svm.c 186.8 KB
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// SPDX-License-Identifier: GPL-2.0-only
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/*
 * Kernel-based Virtual Machine driver for Linux
 *
 * AMD SVM support
 *
 * Copyright (C) 2006 Qumranet, Inc.
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 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
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 *
 * Authors:
 *   Yaniv Kamay  <yaniv@qumranet.com>
 *   Avi Kivity   <avi@qumranet.com>
 */
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#define pr_fmt(fmt) "SVM: " fmt

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#include <linux/kvm_host.h>

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#include "irq.h"
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#include "mmu.h"
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#include "kvm_cache_regs.h"
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#include "x86.h"
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#include "cpuid.h"
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#include "pmu.h"
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/kernel.h>
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#include <linux/vmalloc.h>
#include <linux/highmem.h>
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#include <linux/sched.h>
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#include <linux/trace_events.h>
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#include <linux/slab.h>
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#include <linux/amd-iommu.h>
#include <linux/hashtable.h>
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#include <linux/frame.h>
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#include <linux/psp-sev.h>
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#include <linux/file.h>
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#include <linux/pagemap.h>
#include <linux/swap.h>
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#include <asm/apic.h>
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#include <asm/perf_event.h>
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#include <asm/tlbflush.h>
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#include <asm/desc.h>
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#include <asm/debugreg.h>
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#include <asm/kvm_para.h>
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#include <asm/irq_remapping.h>
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#include <asm/spec-ctrl.h>
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#include <asm/virtext.h>
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#include "trace.h"
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#define __ex(x) __kvm_handle_fault_on_reboot(x)

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MODULE_AUTHOR("Qumranet");
MODULE_LICENSE("GPL");

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static const struct x86_cpu_id svm_cpu_id[] = {
	X86_FEATURE_MATCH(X86_FEATURE_SVM),
	{}
};
MODULE_DEVICE_TABLE(x86cpu, svm_cpu_id);

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#define IOPM_ALLOC_ORDER 2
#define MSRPM_ALLOC_ORDER 1

#define SEG_TYPE_LDT 2
#define SEG_TYPE_BUSY_TSS16 3

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#define SVM_FEATURE_LBRV           (1 <<  1)
#define SVM_FEATURE_SVML           (1 <<  2)
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#define SVM_FEATURE_TSC_RATE       (1 <<  4)
#define SVM_FEATURE_VMCB_CLEAN     (1 <<  5)
#define SVM_FEATURE_FLUSH_ASID     (1 <<  6)
#define SVM_FEATURE_DECODE_ASSIST  (1 <<  7)
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#define SVM_FEATURE_PAUSE_FILTER   (1 << 10)
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#define SVM_AVIC_DOORBELL	0xc001011b

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#define NESTED_EXIT_HOST	0	/* Exit handled on host level */
#define NESTED_EXIT_DONE	1	/* Exit caused nested vmexit  */
#define NESTED_EXIT_CONTINUE	2	/* Further checks needed      */

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#define DEBUGCTL_RESERVED_BITS (~(0x3fULL))

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#define TSC_RATIO_RSVD          0xffffff0000000000ULL
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#define TSC_RATIO_MIN		0x0000000000000001ULL
#define TSC_RATIO_MAX		0x000000ffffffffffULL
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#define AVIC_HPA_MASK	~((0xFFFULL << 52) | 0xFFF)
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/*
 * 0xff is broadcast, so the max index allowed for physical APIC ID
 * table is 0xfe.  APIC IDs above 0xff are reserved.
 */
#define AVIC_MAX_PHYSICAL_ID_COUNT	255

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#define AVIC_UNACCEL_ACCESS_WRITE_MASK		1
#define AVIC_UNACCEL_ACCESS_OFFSET_MASK		0xFF0
#define AVIC_UNACCEL_ACCESS_VECTOR_MASK		0xFFFFFFFF

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/* AVIC GATAG is encoded using VM and VCPU IDs */
#define AVIC_VCPU_ID_BITS		8
#define AVIC_VCPU_ID_MASK		((1 << AVIC_VCPU_ID_BITS) - 1)

#define AVIC_VM_ID_BITS			24
#define AVIC_VM_ID_NR			(1 << AVIC_VM_ID_BITS)
#define AVIC_VM_ID_MASK			((1 << AVIC_VM_ID_BITS) - 1)

#define AVIC_GATAG(x, y)		(((x & AVIC_VM_ID_MASK) << AVIC_VCPU_ID_BITS) | \
						(y & AVIC_VCPU_ID_MASK))
#define AVIC_GATAG_TO_VMID(x)		((x >> AVIC_VCPU_ID_BITS) & AVIC_VM_ID_MASK)
#define AVIC_GATAG_TO_VCPUID(x)		(x & AVIC_VCPU_ID_MASK)

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static bool erratum_383_found __read_mostly;

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static const u32 host_save_user_msrs[] = {
#ifdef CONFIG_X86_64
	MSR_STAR, MSR_LSTAR, MSR_CSTAR, MSR_SYSCALL_MASK, MSR_KERNEL_GS_BASE,
	MSR_FS_BASE,
#endif
	MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
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	MSR_TSC_AUX,
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};

#define NR_HOST_SAVE_USER_MSRS ARRAY_SIZE(host_save_user_msrs)

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struct kvm_sev_info {
	bool active;		/* SEV enabled guest */
	unsigned int asid;	/* ASID used for this guest */
	unsigned int handle;	/* SEV firmware handle */
	int fd;			/* SEV device fd */
	unsigned long pages_locked; /* Number of pages locked */
	struct list_head regions_list;  /* List of registered regions */
};

struct kvm_svm {
	struct kvm kvm;

	/* Struct members for AVIC */
	u32 avic_vm_id;
	struct page *avic_logical_id_table_page;
	struct page *avic_physical_id_table_page;
	struct hlist_node hnode;

	struct kvm_sev_info sev_info;
};

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struct kvm_vcpu;

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struct nested_state {
	struct vmcb *hsave;
	u64 hsave_msr;
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	u64 vm_cr_msr;
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	u64 vmcb;

	/* These are the merged vectors */
	u32 *msrpm;

	/* gpa pointers to the real vectors */
	u64 vmcb_msrpm;
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	u64 vmcb_iopm;
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	/* A VMEXIT is required but not yet emulated */
	bool exit_required;

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	/* cache for intercepts of the guest */
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	u32 intercept_cr;
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	u32 intercept_dr;
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	u32 intercept_exceptions;
	u64 intercept;

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	/* Nested Paging related state */
	u64 nested_cr3;
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};

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#define MSRPM_OFFSETS	16
static u32 msrpm_offsets[MSRPM_OFFSETS] __read_mostly;

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/*
 * Set osvw_len to higher value when updated Revision Guides
 * are published and we know what the new status bits are
 */
static uint64_t osvw_len = 4, osvw_status;

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struct vcpu_svm {
	struct kvm_vcpu vcpu;
	struct vmcb *vmcb;
	unsigned long vmcb_pa;
	struct svm_cpu_data *svm_data;
	uint64_t asid_generation;
	uint64_t sysenter_esp;
	uint64_t sysenter_eip;
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	uint64_t tsc_aux;
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	u64 msr_decfg;

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	u64 next_rip;

	u64 host_user_msrs[NR_HOST_SAVE_USER_MSRS];
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	struct {
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		u16 fs;
		u16 gs;
		u16 ldt;
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		u64 gs_base;
	} host;
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	u64 spec_ctrl;
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	/*
	 * Contains guest-controlled bits of VIRT_SPEC_CTRL, which will be
	 * translated into the appropriate L2_CFG bits on the host to
	 * perform speculative control.
	 */
	u64 virt_spec_ctrl;
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	u32 *msrpm;

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	ulong nmi_iret_rip;

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	struct nested_state nested;
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	bool nmi_singlestep;
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	u64 nmi_singlestep_guest_rflags;
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	unsigned int3_injected;
	unsigned long int3_rip;
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	/* cached guest cpuid flags for faster access */
	bool nrips_enabled	: 1;
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	u32 ldr_reg;
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	u32 dfr_reg;
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	struct page *avic_backing_page;
	u64 *avic_physical_id_cache;
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	bool avic_is_running;
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	/*
	 * Per-vcpu list of struct amd_svm_iommu_ir:
	 * This is used mainly to store interrupt remapping information used
	 * when update the vcpu affinity. This avoids the need to scan for
	 * IRTE and try to match ga_tag in the IOMMU driver.
	 */
	struct list_head ir_list;
	spinlock_t ir_list_lock;
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	/* which host CPU was used for running this vcpu */
	unsigned int last_cpu;
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};

/*
 * This is a wrapper of struct amd_iommu_ir_data.
 */
struct amd_svm_iommu_ir {
	struct list_head node;	/* Used by SVM for per-vcpu ir_list */
	void *data;		/* Storing pointer to struct amd_ir_data */
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};

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#define AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK	(0xFF)
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#define AVIC_LOGICAL_ID_ENTRY_VALID_BIT			31
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#define AVIC_LOGICAL_ID_ENTRY_VALID_MASK		(1 << 31)

#define AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK	(0xFFULL)
#define AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK	(0xFFFFFFFFFFULL << 12)
#define AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK		(1ULL << 62)
#define AVIC_PHYSICAL_ID_ENTRY_VALID_MASK		(1ULL << 63)

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static DEFINE_PER_CPU(u64, current_tsc_ratio);
#define TSC_RATIO_DEFAULT	0x0100000000ULL

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#define MSR_INVALID			0xffffffffU

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static const struct svm_direct_access_msrs {
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	u32 index;   /* Index of the MSR */
	bool always; /* True if intercept is always on */
} direct_access_msrs[] = {
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	{ .index = MSR_STAR,				.always = true  },
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	{ .index = MSR_IA32_SYSENTER_CS,		.always = true  },
#ifdef CONFIG_X86_64
	{ .index = MSR_GS_BASE,				.always = true  },
	{ .index = MSR_FS_BASE,				.always = true  },
	{ .index = MSR_KERNEL_GS_BASE,			.always = true  },
	{ .index = MSR_LSTAR,				.always = true  },
	{ .index = MSR_CSTAR,				.always = true  },
	{ .index = MSR_SYSCALL_MASK,			.always = true  },
#endif
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	{ .index = MSR_IA32_SPEC_CTRL,			.always = false },
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	{ .index = MSR_IA32_PRED_CMD,			.always = false },
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	{ .index = MSR_IA32_LASTBRANCHFROMIP,		.always = false },
	{ .index = MSR_IA32_LASTBRANCHTOIP,		.always = false },
	{ .index = MSR_IA32_LASTINTFROMIP,		.always = false },
	{ .index = MSR_IA32_LASTINTTOIP,		.always = false },
	{ .index = MSR_INVALID,				.always = false },
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};

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/* enable NPT for AMD64 and X86 with PAE */
#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
static bool npt_enabled = true;
#else
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static bool npt_enabled;
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#endif
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/*
 * These 2 parameters are used to config the controls for Pause-Loop Exiting:
 * pause_filter_count: On processors that support Pause filtering(indicated
 *	by CPUID Fn8000_000A_EDX), the VMCB provides a 16 bit pause filter
 *	count value. On VMRUN this value is loaded into an internal counter.
 *	Each time a pause instruction is executed, this counter is decremented
 *	until it reaches zero at which time a #VMEXIT is generated if pause
 *	intercept is enabled. Refer to  AMD APM Vol 2 Section 15.14.4 Pause
 *	Intercept Filtering for more details.
 *	This also indicate if ple logic enabled.
 *
 * pause_filter_thresh: In addition, some processor families support advanced
 *	pause filtering (indicated by CPUID Fn8000_000A_EDX) upper bound on
 *	the amount of time a guest is allowed to execute in a pause loop.
 *	In this mode, a 16-bit pause filter threshold field is added in the
 *	VMCB. The threshold value is a cycle count that is used to reset the
 *	pause counter. As with simple pause filtering, VMRUN loads the pause
 *	count value from VMCB into an internal counter. Then, on each pause
 *	instruction the hardware checks the elapsed number of cycles since
 *	the most recent pause instruction against the pause filter threshold.
 *	If the elapsed cycle count is greater than the pause filter threshold,
 *	then the internal pause count is reloaded from the VMCB and execution
 *	continues. If the elapsed cycle count is less than the pause filter
 *	threshold, then the internal pause count is decremented. If the count
 *	value is less than zero and PAUSE intercept is enabled, a #VMEXIT is
 *	triggered. If advanced pause filtering is supported and pause filter
 *	threshold field is set to zero, the filter will operate in the simpler,
 *	count only mode.
 */

static unsigned short pause_filter_thresh = KVM_DEFAULT_PLE_GAP;
module_param(pause_filter_thresh, ushort, 0444);

static unsigned short pause_filter_count = KVM_SVM_DEFAULT_PLE_WINDOW;
module_param(pause_filter_count, ushort, 0444);

/* Default doubles per-vcpu window every exit. */
static unsigned short pause_filter_count_grow = KVM_DEFAULT_PLE_WINDOW_GROW;
module_param(pause_filter_count_grow, ushort, 0444);

/* Default resets per-vcpu window every exit to pause_filter_count. */
static unsigned short pause_filter_count_shrink = KVM_DEFAULT_PLE_WINDOW_SHRINK;
module_param(pause_filter_count_shrink, ushort, 0444);

/* Default is to compute the maximum so we can never overflow. */
static unsigned short pause_filter_count_max = KVM_SVM_DEFAULT_PLE_WINDOW_MAX;
module_param(pause_filter_count_max, ushort, 0444);

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/* allow nested paging (virtualized MMU) for all guests */
static int npt = true;
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module_param(npt, int, S_IRUGO);
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/* allow nested virtualization in KVM/SVM */
static int nested = true;
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module_param(nested, int, S_IRUGO);

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/* enable / disable AVIC */
static int avic;
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#ifdef CONFIG_X86_LOCAL_APIC
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module_param(avic, int, S_IRUGO);
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#endif
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/* enable/disable Next RIP Save */
static int nrips = true;
module_param(nrips, int, 0444);

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/* enable/disable Virtual VMLOAD VMSAVE */
static int vls = true;
module_param(vls, int, 0444);

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/* enable/disable Virtual GIF */
static int vgif = true;
module_param(vgif, int, 0444);
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/* enable/disable SEV support */
static int sev = IS_ENABLED(CONFIG_AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT);
module_param(sev, int, 0444);

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static bool __read_mostly dump_invalid_vmcb = 0;
module_param(dump_invalid_vmcb, bool, 0644);

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static u8 rsm_ins_bytes[] = "\x0f\xaa";

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static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
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static void svm_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa);
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static void svm_complete_interrupts(struct vcpu_svm *svm);
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static int nested_svm_exit_handled(struct vcpu_svm *svm);
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static int nested_svm_intercept(struct vcpu_svm *svm);
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static int nested_svm_vmexit(struct vcpu_svm *svm);
static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
				      bool has_error_code, u32 error_code);

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enum {
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	VMCB_INTERCEPTS, /* Intercept vectors, TSC offset,
			    pause filter count */
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	VMCB_PERM_MAP,   /* IOPM Base and MSRPM Base */
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	VMCB_ASID,	 /* ASID */
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	VMCB_INTR,	 /* int_ctl, int_vector */
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	VMCB_NPT,        /* npt_en, nCR3, gPAT */
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	VMCB_CR,	 /* CR0, CR3, CR4, EFER */
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	VMCB_DR,         /* DR6, DR7 */
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	VMCB_DT,         /* GDT, IDT */
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	VMCB_SEG,        /* CS, DS, SS, ES, CPL */
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	VMCB_CR2,        /* CR2 only */
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	VMCB_LBR,        /* DBGCTL, BR_FROM, BR_TO, LAST_EX_FROM, LAST_EX_TO */
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	VMCB_AVIC,       /* AVIC APIC_BAR, AVIC APIC_BACKING_PAGE,
			  * AVIC PHYSICAL_TABLE pointer,
			  * AVIC LOGICAL_TABLE pointer
			  */
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	VMCB_DIRTY_MAX,
};

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/* TPR and CR2 are always written before VMRUN */
#define VMCB_ALWAYS_DIRTY_MASK	((1U << VMCB_INTR) | (1U << VMCB_CR2))
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#define VMCB_AVIC_APIC_BAR_MASK		0xFFFFFFFFFF000ULL

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static unsigned int max_sev_asid;
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static unsigned int min_sev_asid;
static unsigned long *sev_asid_bitmap;
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#define __sme_page_pa(x) __sme_set(page_to_pfn(x) << PAGE_SHIFT)
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struct enc_region {
	struct list_head list;
	unsigned long npages;
	struct page **pages;
	unsigned long uaddr;
	unsigned long size;
};

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static inline struct kvm_svm *to_kvm_svm(struct kvm *kvm)
{
	return container_of(kvm, struct kvm_svm, kvm);
}

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static inline bool svm_sev_enabled(void)
{
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	return IS_ENABLED(CONFIG_KVM_AMD_SEV) ? max_sev_asid : 0;
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}

static inline bool sev_guest(struct kvm *kvm)
{
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#ifdef CONFIG_KVM_AMD_SEV
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	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
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	return sev->active;
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#else
	return false;
#endif
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}
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static inline int sev_get_asid(struct kvm *kvm)
{
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	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
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	return sev->asid;
}

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static inline void mark_all_dirty(struct vmcb *vmcb)
{
	vmcb->control.clean = 0;
}

static inline void mark_all_clean(struct vmcb *vmcb)
{
	vmcb->control.clean = ((1 << VMCB_DIRTY_MAX) - 1)
			       & ~VMCB_ALWAYS_DIRTY_MASK;
}

static inline void mark_dirty(struct vmcb *vmcb, int bit)
{
	vmcb->control.clean &= ~(1 << bit);
}

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static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu)
{
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	return container_of(vcpu, struct vcpu_svm, vcpu);
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}

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static inline void avic_update_vapic_bar(struct vcpu_svm *svm, u64 data)
{
	svm->vmcb->control.avic_vapic_bar = data & VMCB_AVIC_APIC_BAR_MASK;
	mark_dirty(svm->vmcb, VMCB_AVIC);
}

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static inline bool avic_vcpu_is_running(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u64 *entry = svm->avic_physical_id_cache;

	if (!entry)
		return false;

	return (READ_ONCE(*entry) & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK);
}

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static void recalc_intercepts(struct vcpu_svm *svm)
{
	struct vmcb_control_area *c, *h;
	struct nested_state *g;

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	mark_dirty(svm->vmcb, VMCB_INTERCEPTS);

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	if (!is_guest_mode(&svm->vcpu))
		return;

	c = &svm->vmcb->control;
	h = &svm->nested.hsave->control;
	g = &svm->nested;

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	c->intercept_cr = h->intercept_cr | g->intercept_cr;
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	c->intercept_dr = h->intercept_dr | g->intercept_dr;
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	c->intercept_exceptions = h->intercept_exceptions | g->intercept_exceptions;
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	c->intercept = h->intercept | g->intercept;
}

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static inline struct vmcb *get_host_vmcb(struct vcpu_svm *svm)
{
	if (is_guest_mode(&svm->vcpu))
		return svm->nested.hsave;
	else
		return svm->vmcb;
}

static inline void set_cr_intercept(struct vcpu_svm *svm, int bit)
{
	struct vmcb *vmcb = get_host_vmcb(svm);

	vmcb->control.intercept_cr |= (1U << bit);

	recalc_intercepts(svm);
}

static inline void clr_cr_intercept(struct vcpu_svm *svm, int bit)
{
	struct vmcb *vmcb = get_host_vmcb(svm);

	vmcb->control.intercept_cr &= ~(1U << bit);

	recalc_intercepts(svm);
}

static inline bool is_cr_intercept(struct vcpu_svm *svm, int bit)
{
	struct vmcb *vmcb = get_host_vmcb(svm);

	return vmcb->control.intercept_cr & (1U << bit);
}

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static inline void set_dr_intercepts(struct vcpu_svm *svm)
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{
	struct vmcb *vmcb = get_host_vmcb(svm);

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	vmcb->control.intercept_dr = (1 << INTERCEPT_DR0_READ)
		| (1 << INTERCEPT_DR1_READ)
		| (1 << INTERCEPT_DR2_READ)
		| (1 << INTERCEPT_DR3_READ)
		| (1 << INTERCEPT_DR4_READ)
		| (1 << INTERCEPT_DR5_READ)
		| (1 << INTERCEPT_DR6_READ)
		| (1 << INTERCEPT_DR7_READ)
		| (1 << INTERCEPT_DR0_WRITE)
		| (1 << INTERCEPT_DR1_WRITE)
		| (1 << INTERCEPT_DR2_WRITE)
		| (1 << INTERCEPT_DR3_WRITE)
		| (1 << INTERCEPT_DR4_WRITE)
		| (1 << INTERCEPT_DR5_WRITE)
		| (1 << INTERCEPT_DR6_WRITE)
		| (1 << INTERCEPT_DR7_WRITE);
574 575 576 577

	recalc_intercepts(svm);
}

578
static inline void clr_dr_intercepts(struct vcpu_svm *svm)
579 580 581
{
	struct vmcb *vmcb = get_host_vmcb(svm);

582
	vmcb->control.intercept_dr = 0;
583 584 585 586

	recalc_intercepts(svm);
}

587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604
static inline void set_exception_intercept(struct vcpu_svm *svm, int bit)
{
	struct vmcb *vmcb = get_host_vmcb(svm);

	vmcb->control.intercept_exceptions |= (1U << bit);

	recalc_intercepts(svm);
}

static inline void clr_exception_intercept(struct vcpu_svm *svm, int bit)
{
	struct vmcb *vmcb = get_host_vmcb(svm);

	vmcb->control.intercept_exceptions &= ~(1U << bit);

	recalc_intercepts(svm);
}

605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622
static inline void set_intercept(struct vcpu_svm *svm, int bit)
{
	struct vmcb *vmcb = get_host_vmcb(svm);

	vmcb->control.intercept |= (1ULL << bit);

	recalc_intercepts(svm);
}

static inline void clr_intercept(struct vcpu_svm *svm, int bit)
{
	struct vmcb *vmcb = get_host_vmcb(svm);

	vmcb->control.intercept &= ~(1ULL << bit);

	recalc_intercepts(svm);
}

623 624 625 626 627
static inline bool vgif_enabled(struct vcpu_svm *svm)
{
	return !!(svm->vmcb->control.int_ctl & V_GIF_ENABLE_MASK);
}

628 629
static inline void enable_gif(struct vcpu_svm *svm)
{
630 631 632 633
	if (vgif_enabled(svm))
		svm->vmcb->control.int_ctl |= V_GIF_MASK;
	else
		svm->vcpu.arch.hflags |= HF_GIF_MASK;
634 635 636 637
}

static inline void disable_gif(struct vcpu_svm *svm)
{
638 639 640 641
	if (vgif_enabled(svm))
		svm->vmcb->control.int_ctl &= ~V_GIF_MASK;
	else
		svm->vcpu.arch.hflags &= ~HF_GIF_MASK;
642 643 644 645
}

static inline bool gif_set(struct vcpu_svm *svm)
{
646 647 648 649
	if (vgif_enabled(svm))
		return !!(svm->vmcb->control.int_ctl & V_GIF_MASK);
	else
		return !!(svm->vcpu.arch.hflags & HF_GIF_MASK);
650 651
}

652
static unsigned long iopm_base;
A
Avi Kivity 已提交
653 654 655 656

struct kvm_ldttss_desc {
	u16 limit0;
	u16 base0;
J
Joerg Roedel 已提交
657 658
	unsigned base1:8, type:5, dpl:2, p:1;
	unsigned limit1:4, zero0:3, g:1, base2:8;
A
Avi Kivity 已提交
659 660 661 662 663 664 665
	u32 base3;
	u32 zero1;
} __attribute__((packed));

struct svm_cpu_data {
	int cpu;

A
Avi Kivity 已提交
666 667 668
	u64 asid_generation;
	u32 max_asid;
	u32 next_asid;
669
	u32 min_asid;
A
Avi Kivity 已提交
670 671 672
	struct kvm_ldttss_desc *tss_desc;

	struct page *save_area;
A
Ashok Raj 已提交
673
	struct vmcb *current_vmcb;
674 675 676

	/* index = sev_asid, value = vmcb pointer */
	struct vmcb **sev_vmcbs;
A
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677 678 679 680
};

static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);

681
static const u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
A
Avi Kivity 已提交
682

683
#define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges)
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684 685 686
#define MSRS_RANGE_SIZE 2048
#define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)

687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707
static u32 svm_msrpm_offset(u32 msr)
{
	u32 offset;
	int i;

	for (i = 0; i < NUM_MSR_MAPS; i++) {
		if (msr < msrpm_ranges[i] ||
		    msr >= msrpm_ranges[i] + MSRS_IN_RANGE)
			continue;

		offset  = (msr - msrpm_ranges[i]) / 4; /* 4 msrs per u8 */
		offset += (i * MSRS_RANGE_SIZE);       /* add range offset */

		/* Now we have the u8 offset - but need the u32 offset */
		return offset / 4;
	}

	/* MSR not in any range */
	return MSR_INVALID;
}

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708 709 710 711
#define MAX_INST_SIZE 15

static inline void clgi(void)
{
712
	asm volatile (__ex("clgi"));
A
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713 714 715 716
}

static inline void stgi(void)
{
717
	asm volatile (__ex("stgi"));
A
Avi Kivity 已提交
718 719 720 721
}

static inline void invlpga(unsigned long addr, u32 asid)
{
722
	asm volatile (__ex("invlpga %1, %0") : : "c"(asid), "a"(addr));
A
Avi Kivity 已提交
723 724
}

725
static int get_npt_level(struct kvm_vcpu *vcpu)
726 727
{
#ifdef CONFIG_X86_64
728
	return PT64_ROOT_4LEVEL;
729 730 731 732 733
#else
	return PT32E_ROOT_LEVEL;
#endif
}

A
Avi Kivity 已提交
734 735
static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
{
736
	vcpu->arch.efer = efer;
737
	if (!npt_enabled && !(efer & EFER_LMA))
738
		efer &= ~EFER_LME;
A
Avi Kivity 已提交
739

740
	to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME;
741
	mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
A
Avi Kivity 已提交
742 743 744 745 746 747 748 749
}

static int is_external_interrupt(u32 info)
{
	info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
	return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR);
}

750
static u32 svm_get_interrupt_shadow(struct kvm_vcpu *vcpu)
751 752 753 754 755
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u32 ret = 0;

	if (svm->vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK)
756 757
		ret = KVM_X86_SHADOW_INT_STI | KVM_X86_SHADOW_INT_MOV_SS;
	return ret;
758 759 760 761 762 763 764 765 766 767 768 769 770
}

static void svm_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	if (mask == 0)
		svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK;
	else
		svm->vmcb->control.int_state |= SVM_INTERRUPT_SHADOW_MASK;

}

771
static int skip_emulated_instruction(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
772
{
773 774
	struct vcpu_svm *svm = to_svm(vcpu);

775
	if (nrips && svm->vmcb->control.next_rip != 0) {
776
		WARN_ON_ONCE(!static_cpu_has(X86_FEATURE_NRIPS));
777
		svm->next_rip = svm->vmcb->control.next_rip;
778
	}
779

780 781 782
	if (!svm->next_rip)
		return kvm_emulate_instruction(vcpu, EMULTYPE_SKIP);

783 784 785
	if (svm->next_rip - kvm_rip_read(vcpu) > MAX_INST_SIZE)
		printk(KERN_ERR "%s: ip 0x%lx next 0x%llx\n",
		       __func__, kvm_rip_read(vcpu), svm->next_rip);
A
Avi Kivity 已提交
786

787
	kvm_rip_write(vcpu, svm->next_rip);
788
	svm_set_interrupt_shadow(vcpu, 0);
789 790

	return EMULATE_DONE;
A
Avi Kivity 已提交
791 792
}

793
static void svm_queue_exception(struct kvm_vcpu *vcpu)
J
Jan Kiszka 已提交
794 795
{
	struct vcpu_svm *svm = to_svm(vcpu);
796 797
	unsigned nr = vcpu->arch.exception.nr;
	bool has_error_code = vcpu->arch.exception.has_error_code;
798
	bool reinject = vcpu->arch.exception.injected;
799
	u32 error_code = vcpu->arch.exception.error_code;
J
Jan Kiszka 已提交
800

J
Joerg Roedel 已提交
801 802 803 804
	/*
	 * If we are within a nested VM we'd better #VMEXIT and let the guest
	 * handle the exception
	 */
805 806
	if (!reinject &&
	    nested_svm_check_exception(svm, nr, has_error_code, error_code))
J
Jan Kiszka 已提交
807 808
		return;

809 810
	kvm_deliver_exception_payload(&svm->vcpu);

811
	if (nr == BP_VECTOR && !nrips) {
812 813 814 815 816 817 818 819 820
		unsigned long rip, old_rip = kvm_rip_read(&svm->vcpu);

		/*
		 * For guest debugging where we have to reinject #BP if some
		 * INT3 is guest-owned:
		 * Emulate nRIP by moving RIP forward. Will fail if injection
		 * raises a fault that is not intercepted. Still better than
		 * failing in all cases.
		 */
821
		(void)skip_emulated_instruction(&svm->vcpu);
822 823 824 825 826
		rip = kvm_rip_read(&svm->vcpu);
		svm->int3_rip = rip + svm->vmcb->save.cs.base;
		svm->int3_injected = rip - old_rip;
	}

J
Jan Kiszka 已提交
827 828 829 830 831 832 833
	svm->vmcb->control.event_inj = nr
		| SVM_EVTINJ_VALID
		| (has_error_code ? SVM_EVTINJ_VALID_ERR : 0)
		| SVM_EVTINJ_TYPE_EXEPT;
	svm->vmcb->control.event_inj_err = error_code;
}

834 835 836 837 838 839
static void svm_init_erratum_383(void)
{
	u32 low, high;
	int err;
	u64 val;

840
	if (!static_cpu_has_bug(X86_BUG_AMD_TLB_MMATCH))
841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857
		return;

	/* Use _safe variants to not break nested virtualization */
	val = native_read_msr_safe(MSR_AMD64_DC_CFG, &err);
	if (err)
		return;

	val |= (1ULL << 47);

	low  = lower_32_bits(val);
	high = upper_32_bits(val);

	native_write_msr_safe(MSR_AMD64_DC_CFG, low, high);

	erratum_383_found = true;
}

858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878
static void svm_init_osvw(struct kvm_vcpu *vcpu)
{
	/*
	 * Guests should see errata 400 and 415 as fixed (assuming that
	 * HLT and IO instructions are intercepted).
	 */
	vcpu->arch.osvw.length = (osvw_len >= 3) ? (osvw_len) : 3;
	vcpu->arch.osvw.status = osvw_status & ~(6ULL);

	/*
	 * By increasing VCPU's osvw.length to 3 we are telling the guest that
	 * all osvw.status bits inside that length, including bit 0 (which is
	 * reserved for erratum 298), are valid. However, if host processor's
	 * osvw_len is 0 then osvw_status[0] carries no information. We need to
	 * be conservative here and therefore we tell the guest that erratum 298
	 * is present (because we really don't know).
	 */
	if (osvw_len == 0 && boot_cpu_data.x86 == 0x10)
		vcpu->arch.osvw.status |= 1;
}

A
Avi Kivity 已提交
879 880
static int has_svm(void)
{
881
	const char *msg;
A
Avi Kivity 已提交
882

883
	if (!cpu_has_svm(&msg)) {
J
Joe Perches 已提交
884
		printk(KERN_INFO "has_svm: %s\n", msg);
A
Avi Kivity 已提交
885 886 887 888 889 890
		return 0;
	}

	return 1;
}

891
static void svm_hardware_disable(void)
A
Avi Kivity 已提交
892
{
893 894 895 896
	/* Make sure we clean up behind us */
	if (static_cpu_has(X86_FEATURE_TSCRATEMSR))
		wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);

897
	cpu_svm_disable();
898 899

	amd_pmu_disable_virt();
A
Avi Kivity 已提交
900 901
}

902
static int svm_hardware_enable(void)
A
Avi Kivity 已提交
903 904
{

905
	struct svm_cpu_data *sd;
A
Avi Kivity 已提交
906 907 908 909
	uint64_t efer;
	struct desc_struct *gdt;
	int me = raw_smp_processor_id();

910 911 912 913
	rdmsrl(MSR_EFER, efer);
	if (efer & EFER_SVME)
		return -EBUSY;

A
Avi Kivity 已提交
914
	if (!has_svm()) {
915
		pr_err("%s: err EOPNOTSUPP on %d\n", __func__, me);
916
		return -EINVAL;
A
Avi Kivity 已提交
917
	}
918 919
	sd = per_cpu(svm_data, me);
	if (!sd) {
920
		pr_err("%s: svm_data is NULL on %d\n", __func__, me);
921
		return -EINVAL;
A
Avi Kivity 已提交
922 923
	}

924 925 926
	sd->asid_generation = 1;
	sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
	sd->next_asid = sd->max_asid + 1;
927
	sd->min_asid = max_sev_asid + 1;
A
Avi Kivity 已提交
928

929
	gdt = get_current_gdt_rw();
930
	sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
A
Avi Kivity 已提交
931

932
	wrmsrl(MSR_EFER, efer | EFER_SVME);
A
Avi Kivity 已提交
933

934
	wrmsrl(MSR_VM_HSAVE_PA, page_to_pfn(sd->save_area) << PAGE_SHIFT);
935

936 937
	if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) {
		wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);
938
		__this_cpu_write(current_tsc_ratio, TSC_RATIO_DEFAULT);
939 940
	}

941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970

	/*
	 * Get OSVW bits.
	 *
	 * Note that it is possible to have a system with mixed processor
	 * revisions and therefore different OSVW bits. If bits are not the same
	 * on different processors then choose the worst case (i.e. if erratum
	 * is present on one processor and not on another then assume that the
	 * erratum is present everywhere).
	 */
	if (cpu_has(&boot_cpu_data, X86_FEATURE_OSVW)) {
		uint64_t len, status = 0;
		int err;

		len = native_read_msr_safe(MSR_AMD64_OSVW_ID_LENGTH, &err);
		if (!err)
			status = native_read_msr_safe(MSR_AMD64_OSVW_STATUS,
						      &err);

		if (err)
			osvw_status = osvw_len = 0;
		else {
			if (len < osvw_len)
				osvw_len = len;
			osvw_status |= status;
			osvw_status &= (1ULL << osvw_len) - 1;
		}
	} else
		osvw_status = osvw_len = 0;

971 972
	svm_init_erratum_383();

973 974
	amd_pmu_enable_virt();

975
	return 0;
A
Avi Kivity 已提交
976 977
}

978 979
static void svm_cpu_uninit(int cpu)
{
980
	struct svm_cpu_data *sd = per_cpu(svm_data, raw_smp_processor_id());
981

982
	if (!sd)
983 984 985
		return;

	per_cpu(svm_data, raw_smp_processor_id()) = NULL;
986
	kfree(sd->sev_vmcbs);
987 988
	__free_page(sd->save_area);
	kfree(sd);
989 990
}

A
Avi Kivity 已提交
991 992
static int svm_cpu_init(int cpu)
{
993
	struct svm_cpu_data *sd;
A
Avi Kivity 已提交
994 995
	int r;

996 997
	sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
	if (!sd)
A
Avi Kivity 已提交
998
		return -ENOMEM;
999
	sd->cpu = cpu;
A
Avi Kivity 已提交
1000
	r = -ENOMEM;
1001
	sd->save_area = alloc_page(GFP_KERNEL);
1002
	if (!sd->save_area)
A
Avi Kivity 已提交
1003 1004
		goto err_1;

1005 1006
	if (svm_sev_enabled()) {
		r = -ENOMEM;
1007 1008 1009
		sd->sev_vmcbs = kmalloc_array(max_sev_asid + 1,
					      sizeof(void *),
					      GFP_KERNEL);
1010 1011 1012 1013
		if (!sd->sev_vmcbs)
			goto err_1;
	}

1014
	per_cpu(svm_data, cpu) = sd;
A
Avi Kivity 已提交
1015 1016 1017 1018

	return 0;

err_1:
1019
	kfree(sd);
A
Avi Kivity 已提交
1020 1021 1022 1023
	return r;

}

1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034
static bool valid_msr_intercept(u32 index)
{
	int i;

	for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++)
		if (direct_access_msrs[i].index == index)
			return true;

	return false;
}

1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053
static bool msr_write_intercepted(struct kvm_vcpu *vcpu, unsigned msr)
{
	u8 bit_write;
	unsigned long tmp;
	u32 offset;
	u32 *msrpm;

	msrpm = is_guest_mode(vcpu) ? to_svm(vcpu)->nested.msrpm:
				      to_svm(vcpu)->msrpm;

	offset    = svm_msrpm_offset(msr);
	bit_write = 2 * (msr & 0x0f) + 1;
	tmp       = msrpm[offset];

	BUG_ON(offset == MSR_INVALID);

	return !!test_bit(bit_write,  &tmp);
}

1054 1055
static void set_msr_interception(u32 *msrpm, unsigned msr,
				 int read, int write)
A
Avi Kivity 已提交
1056
{
1057 1058 1059
	u8 bit_read, bit_write;
	unsigned long tmp;
	u32 offset;
A
Avi Kivity 已提交
1060

1061 1062 1063 1064 1065 1066
	/*
	 * If this warning triggers extend the direct_access_msrs list at the
	 * beginning of the file
	 */
	WARN_ON(!valid_msr_intercept(msr));

1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077
	offset    = svm_msrpm_offset(msr);
	bit_read  = 2 * (msr & 0x0f);
	bit_write = 2 * (msr & 0x0f) + 1;
	tmp       = msrpm[offset];

	BUG_ON(offset == MSR_INVALID);

	read  ? clear_bit(bit_read,  &tmp) : set_bit(bit_read,  &tmp);
	write ? clear_bit(bit_write, &tmp) : set_bit(bit_write, &tmp);

	msrpm[offset] = tmp;
A
Avi Kivity 已提交
1078 1079
}

1080
static void svm_vcpu_init_msrpm(u32 *msrpm)
A
Avi Kivity 已提交
1081 1082 1083
{
	int i;

1084 1085
	memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));

1086 1087 1088 1089 1090 1091
	for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) {
		if (!direct_access_msrs[i].always)
			continue;

		set_msr_interception(msrpm, direct_access_msrs[i].index, 1, 1);
	}
1092 1093
}

1094 1095 1096 1097 1098 1099 1100 1101
static void add_msr_offset(u32 offset)
{
	int i;

	for (i = 0; i < MSRPM_OFFSETS; ++i) {

		/* Offset already in list? */
		if (msrpm_offsets[i] == offset)
1102
			return;
1103 1104 1105 1106 1107 1108 1109 1110 1111

		/* Slot used by another offset? */
		if (msrpm_offsets[i] != MSR_INVALID)
			continue;

		/* Add offset to list */
		msrpm_offsets[i] = offset;

		return;
A
Avi Kivity 已提交
1112
	}
1113 1114 1115 1116 1117

	/*
	 * If this BUG triggers the msrpm_offsets table has an overflow. Just
	 * increase MSRPM_OFFSETS in this case.
	 */
1118
	BUG();
A
Avi Kivity 已提交
1119 1120
}

1121
static void init_msrpm_offsets(void)
1122
{
1123
	int i;
1124

1125 1126 1127 1128 1129 1130 1131 1132 1133 1134
	memset(msrpm_offsets, 0xff, sizeof(msrpm_offsets));

	for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) {
		u32 offset;

		offset = svm_msrpm_offset(direct_access_msrs[i].index);
		BUG_ON(offset == MSR_INVALID);

		add_msr_offset(offset);
	}
1135 1136
}

1137 1138 1139 1140
static void svm_enable_lbrv(struct vcpu_svm *svm)
{
	u32 *msrpm = svm->msrpm;

1141
	svm->vmcb->control.virt_ext |= LBR_CTL_ENABLE_MASK;
1142 1143 1144 1145 1146 1147 1148 1149 1150 1151
	set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 1, 1);
	set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 1, 1);
	set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 1, 1);
	set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 1, 1);
}

static void svm_disable_lbrv(struct vcpu_svm *svm)
{
	u32 *msrpm = svm->msrpm;

1152
	svm->vmcb->control.virt_ext &= ~LBR_CTL_ENABLE_MASK;
1153 1154 1155 1156 1157 1158
	set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 0, 0);
	set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 0, 0);
	set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 0, 0);
	set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 0, 0);
}

1159 1160 1161
static void disable_nmi_singlestep(struct vcpu_svm *svm)
{
	svm->nmi_singlestep = false;
1162

1163 1164 1165 1166 1167 1168 1169
	if (!(svm->vcpu.guest_debug & KVM_GUESTDBG_SINGLESTEP)) {
		/* Clear our flags if they were not set by the guest */
		if (!(svm->nmi_singlestep_guest_rflags & X86_EFLAGS_TF))
			svm->vmcb->save.rflags &= ~X86_EFLAGS_TF;
		if (!(svm->nmi_singlestep_guest_rflags & X86_EFLAGS_RF))
			svm->vmcb->save.rflags &= ~X86_EFLAGS_RF;
	}
1170 1171
}

1172
/* Note:
1173
 * This hash table is used to map VM_ID to a struct kvm_svm,
1174 1175 1176 1177
 * when handling AMD IOMMU GALOG notification to schedule in
 * a particular vCPU.
 */
#define SVM_VM_DATA_HASH_BITS	8
1178
static DEFINE_HASHTABLE(svm_vm_data_hash, SVM_VM_DATA_HASH_BITS);
1179 1180
static u32 next_vm_id = 0;
static bool next_vm_id_wrapped = 0;
1181
static DEFINE_SPINLOCK(svm_vm_data_hash_lock);
1182 1183 1184 1185 1186 1187 1188 1189

/* Note:
 * This function is called from IOMMU driver to notify
 * SVM to schedule in a particular vCPU of a particular VM.
 */
static int avic_ga_log_notifier(u32 ga_tag)
{
	unsigned long flags;
1190
	struct kvm_svm *kvm_svm;
1191 1192 1193 1194 1195 1196 1197
	struct kvm_vcpu *vcpu = NULL;
	u32 vm_id = AVIC_GATAG_TO_VMID(ga_tag);
	u32 vcpu_id = AVIC_GATAG_TO_VCPUID(ga_tag);

	pr_debug("SVM: %s: vm_id=%#x, vcpu_id=%#x\n", __func__, vm_id, vcpu_id);

	spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
1198 1199
	hash_for_each_possible(svm_vm_data_hash, kvm_svm, hnode, vm_id) {
		if (kvm_svm->avic_vm_id != vm_id)
1200
			continue;
1201
		vcpu = kvm_get_vcpu_by_id(&kvm_svm->kvm, vcpu_id);
1202 1203 1204 1205 1206 1207 1208 1209 1210
		break;
	}
	spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);

	/* Note:
	 * At this point, the IOMMU should have already set the pending
	 * bit in the vAPIC backing page. So, we just need to schedule
	 * in the vcpu.
	 */
1211
	if (vcpu)
1212 1213 1214 1215 1216
		kvm_vcpu_wake_up(vcpu);

	return 0;
}

B
Brijesh Singh 已提交
1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227
static __init int sev_hardware_setup(void)
{
	struct sev_user_data_status *status;
	int rc;

	/* Maximum number of encrypted guests supported simultaneously */
	max_sev_asid = cpuid_ecx(0x8000001F);

	if (!max_sev_asid)
		return 1;

B
Brijesh Singh 已提交
1228 1229 1230 1231
	/* Minimum ASID value that should be used for SEV guest */
	min_sev_asid = cpuid_edx(0x8000001F);

	/* Initialize SEV ASID bitmap */
1232
	sev_asid_bitmap = bitmap_zalloc(max_sev_asid, GFP_KERNEL);
B
Brijesh Singh 已提交
1233 1234 1235
	if (!sev_asid_bitmap)
		return 1;

B
Brijesh Singh 已提交
1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257
	status = kmalloc(sizeof(*status), GFP_KERNEL);
	if (!status)
		return 1;

	/*
	 * Check SEV platform status.
	 *
	 * PLATFORM_STATUS can be called in any state, if we failed to query
	 * the PLATFORM status then either PSP firmware does not support SEV
	 * feature or SEV firmware is dead.
	 */
	rc = sev_platform_status(status, NULL);
	if (rc)
		goto err;

	pr_info("SEV supported\n");

err:
	kfree(status);
	return rc;
}

1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268
static void grow_ple_window(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb_control_area *control = &svm->vmcb->control;
	int old = control->pause_filter_count;

	control->pause_filter_count = __grow_ple_window(old,
							pause_filter_count,
							pause_filter_count_grow,
							pause_filter_count_max);

P
Peter Xu 已提交
1269
	if (control->pause_filter_count != old) {
1270
		mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
P
Peter Xu 已提交
1271 1272 1273
		trace_kvm_ple_window_update(vcpu->vcpu_id,
					    control->pause_filter_count, old);
	}
1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286
}

static void shrink_ple_window(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb_control_area *control = &svm->vmcb->control;
	int old = control->pause_filter_count;

	control->pause_filter_count =
				__shrink_ple_window(old,
						    pause_filter_count,
						    pause_filter_count_shrink,
						    pause_filter_count);
P
Peter Xu 已提交
1287
	if (control->pause_filter_count != old) {
1288
		mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
P
Peter Xu 已提交
1289 1290 1291
		trace_kvm_ple_window_update(vcpu->vcpu_id,
					    control->pause_filter_count, old);
	}
1292 1293
}

A
Avi Kivity 已提交
1294 1295 1296 1297
static __init int svm_hardware_setup(void)
{
	int cpu;
	struct page *iopm_pages;
1298
	void *iopm_va;
A
Avi Kivity 已提交
1299 1300 1301 1302 1303 1304
	int r;

	iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);

	if (!iopm_pages)
		return -ENOMEM;
1305 1306 1307

	iopm_va = page_address(iopm_pages);
	memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
A
Avi Kivity 已提交
1308 1309
	iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;

1310 1311
	init_msrpm_offsets();

1312 1313 1314
	if (boot_cpu_has(X86_FEATURE_NX))
		kvm_enable_efer_bits(EFER_NX);

A
Alexander Graf 已提交
1315 1316 1317
	if (boot_cpu_has(X86_FEATURE_FXSR_OPT))
		kvm_enable_efer_bits(EFER_FFXSR);

1318 1319
	if (boot_cpu_has(X86_FEATURE_TSCRATEMSR)) {
		kvm_has_tsc_control = true;
1320 1321
		kvm_max_tsc_scaling_ratio = TSC_RATIO_MAX;
		kvm_tsc_scaling_ratio_frac_bits = 32;
1322 1323
	}

1324 1325 1326 1327 1328 1329 1330 1331
	/* Check for pause filtering support */
	if (!boot_cpu_has(X86_FEATURE_PAUSEFILTER)) {
		pause_filter_count = 0;
		pause_filter_thresh = 0;
	} else if (!boot_cpu_has(X86_FEATURE_PFTHRESHOLD)) {
		pause_filter_thresh = 0;
	}

1332 1333
	if (nested) {
		printk(KERN_INFO "kvm: Nested Virtualization enabled\n");
1334
		kvm_enable_efer_bits(EFER_SVME | EFER_LMSLE);
1335 1336
	}

B
Brijesh Singh 已提交
1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347
	if (sev) {
		if (boot_cpu_has(X86_FEATURE_SEV) &&
		    IS_ENABLED(CONFIG_KVM_AMD_SEV)) {
			r = sev_hardware_setup();
			if (r)
				sev = false;
		} else {
			sev = false;
		}
	}

Z
Zachary Amsden 已提交
1348
	for_each_possible_cpu(cpu) {
A
Avi Kivity 已提交
1349 1350
		r = svm_cpu_init(cpu);
		if (r)
1351
			goto err;
A
Avi Kivity 已提交
1352
	}
1353

1354
	if (!boot_cpu_has(X86_FEATURE_NPT))
1355 1356
		npt_enabled = false;

1357 1358 1359 1360 1361
	if (npt_enabled && !npt) {
		printk(KERN_INFO "kvm: Nested Paging disabled\n");
		npt_enabled = false;
	}

1362
	if (npt_enabled) {
1363
		printk(KERN_INFO "kvm: Nested Paging enabled\n");
1364
		kvm_enable_tdp();
1365 1366
	} else
		kvm_disable_tdp();
1367

1368 1369 1370 1371 1372
	if (nrips) {
		if (!boot_cpu_has(X86_FEATURE_NRIPS))
			nrips = false;
	}

1373 1374 1375
	if (avic) {
		if (!npt_enabled ||
		    !boot_cpu_has(X86_FEATURE_AVIC) ||
1376
		    !IS_ENABLED(CONFIG_X86_LOCAL_APIC)) {
1377
			avic = false;
1378
		} else {
1379
			pr_info("AVIC enabled\n");
1380 1381 1382

			amd_iommu_register_ga_log_notifier(&avic_ga_log_notifier);
		}
1383
	}
1384

1385 1386
	if (vls) {
		if (!npt_enabled ||
1387
		    !boot_cpu_has(X86_FEATURE_V_VMSAVE_VMLOAD) ||
1388 1389 1390 1391 1392 1393 1394
		    !IS_ENABLED(CONFIG_X86_64)) {
			vls = false;
		} else {
			pr_info("Virtual VMLOAD VMSAVE supported\n");
		}
	}

1395 1396 1397 1398 1399 1400 1401
	if (vgif) {
		if (!boot_cpu_has(X86_FEATURE_VGIF))
			vgif = false;
		else
			pr_info("Virtual GIF supported\n");
	}

A
Avi Kivity 已提交
1402 1403
	return 0;

1404
err:
A
Avi Kivity 已提交
1405 1406 1407 1408 1409 1410 1411
	__free_pages(iopm_pages, IOPM_ALLOC_ORDER);
	iopm_base = 0;
	return r;
}

static __exit void svm_hardware_unsetup(void)
{
1412 1413
	int cpu;

B
Brijesh Singh 已提交
1414
	if (svm_sev_enabled())
1415
		bitmap_free(sev_asid_bitmap);
B
Brijesh Singh 已提交
1416

Z
Zachary Amsden 已提交
1417
	for_each_possible_cpu(cpu)
1418 1419
		svm_cpu_uninit(cpu);

A
Avi Kivity 已提交
1420
	__free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
1421
	iopm_base = 0;
A
Avi Kivity 已提交
1422 1423 1424 1425 1426 1427
}

static void init_seg(struct vmcb_seg *seg)
{
	seg->selector = 0;
	seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK |
J
Joerg Roedel 已提交
1428
		      SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
A
Avi Kivity 已提交
1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440
	seg->limit = 0xffff;
	seg->base = 0;
}

static void init_sys_seg(struct vmcb_seg *seg, uint32_t type)
{
	seg->selector = 0;
	seg->attrib = SVM_SELECTOR_P_MASK | type;
	seg->limit = 0xffff;
	seg->base = 0;
}

1441 1442 1443 1444 1445 1446 1447 1448 1449 1450
static u64 svm_read_l1_tsc_offset(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	if (is_guest_mode(vcpu))
		return svm->nested.hsave->control.tsc_offset;

	return vcpu->arch.tsc_offset;
}

1451
static u64 svm_write_l1_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
1452 1453 1454 1455
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u64 g_tsc_offset = 0;

1456
	if (is_guest_mode(vcpu)) {
1457
		/* Write L1's TSC offset.  */
1458 1459 1460
		g_tsc_offset = svm->vmcb->control.tsc_offset -
			       svm->nested.hsave->control.tsc_offset;
		svm->nested.hsave->control.tsc_offset = offset;
1461 1462 1463 1464 1465
	}

	trace_kvm_write_tsc_offset(vcpu->vcpu_id,
				   svm->vmcb->control.tsc_offset - g_tsc_offset,
				   offset);
1466 1467

	svm->vmcb->control.tsc_offset = offset + g_tsc_offset;
1468 1469

	mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
1470
	return svm->vmcb->control.tsc_offset;
1471 1472
}

1473 1474 1475
static void avic_init_vmcb(struct vcpu_svm *svm)
{
	struct vmcb *vmcb = svm->vmcb;
1476
	struct kvm_svm *kvm_svm = to_kvm_svm(svm->vcpu.kvm);
1477
	phys_addr_t bpa = __sme_set(page_to_phys(svm->avic_backing_page));
1478 1479
	phys_addr_t lpa = __sme_set(page_to_phys(kvm_svm->avic_logical_id_table_page));
	phys_addr_t ppa = __sme_set(page_to_phys(kvm_svm->avic_physical_id_table_page));
1480 1481 1482 1483 1484 1485 1486 1487

	vmcb->control.avic_backing_page = bpa & AVIC_HPA_MASK;
	vmcb->control.avic_logical_id = lpa & AVIC_HPA_MASK;
	vmcb->control.avic_physical_id = ppa & AVIC_HPA_MASK;
	vmcb->control.avic_physical_id |= AVIC_MAX_PHYSICAL_ID_COUNT;
	vmcb->control.int_ctl |= AVIC_ENABLE_MASK;
}

P
Paolo Bonzini 已提交
1488
static void init_vmcb(struct vcpu_svm *svm)
A
Avi Kivity 已提交
1489
{
1490 1491
	struct vmcb_control_area *control = &svm->vmcb->control;
	struct vmcb_save_area *save = &svm->vmcb->save;
A
Avi Kivity 已提交
1492

1493
	svm->vcpu.arch.hflags = 0;
1494

1495 1496 1497 1498 1499 1500
	set_cr_intercept(svm, INTERCEPT_CR0_READ);
	set_cr_intercept(svm, INTERCEPT_CR3_READ);
	set_cr_intercept(svm, INTERCEPT_CR4_READ);
	set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
	set_cr_intercept(svm, INTERCEPT_CR3_WRITE);
	set_cr_intercept(svm, INTERCEPT_CR4_WRITE);
1501 1502
	if (!kvm_vcpu_apicv_active(&svm->vcpu))
		set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
A
Avi Kivity 已提交
1503

1504
	set_dr_intercepts(svm);
A
Avi Kivity 已提交
1505

1506 1507 1508
	set_exception_intercept(svm, PF_VECTOR);
	set_exception_intercept(svm, UD_VECTOR);
	set_exception_intercept(svm, MC_VECTOR);
1509
	set_exception_intercept(svm, AC_VECTOR);
1510
	set_exception_intercept(svm, DB_VECTOR);
1511 1512 1513 1514 1515 1516 1517 1518
	/*
	 * Guest access to VMware backdoor ports could legitimately
	 * trigger #GP because of TSS I/O permission bitmap.
	 * We intercept those #GP and allow access to them anyway
	 * as VMware does.
	 */
	if (enable_vmware_backdoor)
		set_exception_intercept(svm, GP_VECTOR);
A
Avi Kivity 已提交
1519

1520 1521 1522 1523
	set_intercept(svm, INTERCEPT_INTR);
	set_intercept(svm, INTERCEPT_NMI);
	set_intercept(svm, INTERCEPT_SMI);
	set_intercept(svm, INTERCEPT_SELECTIVE_CR0);
A
Avi Kivity 已提交
1524
	set_intercept(svm, INTERCEPT_RDPMC);
1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540
	set_intercept(svm, INTERCEPT_CPUID);
	set_intercept(svm, INTERCEPT_INVD);
	set_intercept(svm, INTERCEPT_INVLPG);
	set_intercept(svm, INTERCEPT_INVLPGA);
	set_intercept(svm, INTERCEPT_IOIO_PROT);
	set_intercept(svm, INTERCEPT_MSR_PROT);
	set_intercept(svm, INTERCEPT_TASK_SWITCH);
	set_intercept(svm, INTERCEPT_SHUTDOWN);
	set_intercept(svm, INTERCEPT_VMRUN);
	set_intercept(svm, INTERCEPT_VMMCALL);
	set_intercept(svm, INTERCEPT_VMLOAD);
	set_intercept(svm, INTERCEPT_VMSAVE);
	set_intercept(svm, INTERCEPT_STGI);
	set_intercept(svm, INTERCEPT_CLGI);
	set_intercept(svm, INTERCEPT_SKINIT);
	set_intercept(svm, INTERCEPT_WBINVD);
J
Joerg Roedel 已提交
1541
	set_intercept(svm, INTERCEPT_XSETBV);
B
Brijesh Singh 已提交
1542
	set_intercept(svm, INTERCEPT_RSM);
A
Avi Kivity 已提交
1543

1544
	if (!kvm_mwait_in_guest(svm->vcpu.kvm)) {
1545 1546 1547 1548
		set_intercept(svm, INTERCEPT_MONITOR);
		set_intercept(svm, INTERCEPT_MWAIT);
	}

1549 1550 1551
	if (!kvm_hlt_in_guest(svm->vcpu.kvm))
		set_intercept(svm, INTERCEPT_HLT);

1552 1553
	control->iopm_base_pa = __sme_set(iopm_base);
	control->msrpm_base_pa = __sme_set(__pa(svm->msrpm));
A
Avi Kivity 已提交
1554 1555 1556 1557 1558 1559 1560 1561 1562
	control->int_ctl = V_INTR_MASKING_MASK;

	init_seg(&save->es);
	init_seg(&save->ss);
	init_seg(&save->ds);
	init_seg(&save->fs);
	init_seg(&save->gs);

	save->cs.selector = 0xf000;
1563
	save->cs.base = 0xffff0000;
A
Avi Kivity 已提交
1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574
	/* Executable/Readable Code Segment */
	save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK |
		SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK;
	save->cs.limit = 0xffff;

	save->gdtr.limit = 0xffff;
	save->idtr.limit = 0xffff;

	init_sys_seg(&save->ldtr, SEG_TYPE_LDT);
	init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16);

P
Paolo Bonzini 已提交
1575
	svm_set_efer(&svm->vcpu, 0);
M
Mike Day 已提交
1576
	save->dr6 = 0xffff0ff0;
1577
	kvm_set_rflags(&svm->vcpu, 2);
A
Avi Kivity 已提交
1578
	save->rip = 0x0000fff0;
1579
	svm->vcpu.arch.regs[VCPU_REGS_RIP] = save->rip;
A
Avi Kivity 已提交
1580

J
Joerg Roedel 已提交
1581
	/*
1582
	 * svm_set_cr0() sets PG and WP and clears NW and CD on save->cr0.
1583
	 * It also updates the guest-visible cr0 value.
A
Avi Kivity 已提交
1584
	 */
1585
	svm_set_cr0(&svm->vcpu, X86_CR0_NW | X86_CR0_CD | X86_CR0_ET);
1586
	kvm_mmu_reset_context(&svm->vcpu);
1587

1588
	save->cr4 = X86_CR4_PAE;
A
Avi Kivity 已提交
1589
	/* rdx = ?? */
1590 1591 1592

	if (npt_enabled) {
		/* Setup VMCB for Nested Paging */
1593
		control->nested_ctl |= SVM_NESTED_CTL_NP_ENABLE;
1594
		clr_intercept(svm, INTERCEPT_INVLPG);
1595
		clr_exception_intercept(svm, PF_VECTOR);
1596 1597
		clr_cr_intercept(svm, INTERCEPT_CR3_READ);
		clr_cr_intercept(svm, INTERCEPT_CR3_WRITE);
1598
		save->g_pat = svm->vcpu.arch.pat;
1599 1600 1601
		save->cr3 = 0;
		save->cr4 = 0;
	}
1602
	svm->asid_generation = 0;
1603

1604
	svm->nested.vmcb = 0;
1605 1606
	svm->vcpu.arch.hflags = 0;

1607 1608 1609 1610
	if (pause_filter_count) {
		control->pause_filter_count = pause_filter_count;
		if (pause_filter_thresh)
			control->pause_filter_thresh = pause_filter_thresh;
1611
		set_intercept(svm, INTERCEPT_PAUSE);
1612 1613
	} else {
		clr_intercept(svm, INTERCEPT_PAUSE);
1614 1615
	}

1616
	if (kvm_vcpu_apicv_active(&svm->vcpu))
1617 1618
		avic_init_vmcb(svm);

1619 1620 1621 1622 1623 1624 1625 1626 1627 1628
	/*
	 * If hardware supports Virtual VMLOAD VMSAVE then enable it
	 * in VMCB and clear intercepts to avoid #VMEXIT.
	 */
	if (vls) {
		clr_intercept(svm, INTERCEPT_VMLOAD);
		clr_intercept(svm, INTERCEPT_VMSAVE);
		svm->vmcb->control.virt_ext |= VIRTUAL_VMLOAD_VMSAVE_ENABLE_MASK;
	}

1629 1630 1631 1632 1633 1634
	if (vgif) {
		clr_intercept(svm, INTERCEPT_STGI);
		clr_intercept(svm, INTERCEPT_CLGI);
		svm->vmcb->control.int_ctl |= V_GIF_ENABLE_MASK;
	}

1635
	if (sev_guest(svm->vcpu.kvm)) {
B
Brijesh Singh 已提交
1636
		svm->vmcb->control.nested_ctl |= SVM_NESTED_CTL_SEV_ENABLE;
1637 1638
		clr_exception_intercept(svm, UD_VECTOR);
	}
B
Brijesh Singh 已提交
1639

1640 1641
	mark_all_dirty(svm->vmcb);

1642
	enable_gif(svm);
1643 1644 1645

}

1646 1647
static u64 *avic_get_physical_id_entry(struct kvm_vcpu *vcpu,
				       unsigned int index)
1648 1649
{
	u64 *avic_physical_id_table;
1650
	struct kvm_svm *kvm_svm = to_kvm_svm(vcpu->kvm);
1651 1652 1653 1654

	if (index >= AVIC_MAX_PHYSICAL_ID_COUNT)
		return NULL;

1655
	avic_physical_id_table = page_address(kvm_svm->avic_physical_id_table_page);
1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670

	return &avic_physical_id_table[index];
}

/**
 * Note:
 * AVIC hardware walks the nested page table to check permissions,
 * but does not use the SPA address specified in the leaf page
 * table entry since it uses  address in the AVIC_BACKING_PAGE pointer
 * field of the VMCB. Therefore, we set up the
 * APIC_ACCESS_PAGE_PRIVATE_MEMSLOT (4KB) here.
 */
static int avic_init_access_page(struct kvm_vcpu *vcpu)
{
	struct kvm *kvm = vcpu->kvm;
1671
	int ret = 0;
1672

1673
	mutex_lock(&kvm->slots_lock);
1674
	if (kvm->arch.apic_access_page_done)
1675
		goto out;
1676

1677 1678 1679 1680
	ret = __x86_set_memory_region(kvm,
				      APIC_ACCESS_PAGE_PRIVATE_MEMSLOT,
				      APIC_DEFAULT_PHYS_BASE,
				      PAGE_SIZE);
1681
	if (ret)
1682
		goto out;
1683 1684

	kvm->arch.apic_access_page_done = true;
1685 1686 1687
out:
	mutex_unlock(&kvm->slots_lock);
	return ret;
1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713
}

static int avic_init_backing_page(struct kvm_vcpu *vcpu)
{
	int ret;
	u64 *entry, new_entry;
	int id = vcpu->vcpu_id;
	struct vcpu_svm *svm = to_svm(vcpu);

	ret = avic_init_access_page(vcpu);
	if (ret)
		return ret;

	if (id >= AVIC_MAX_PHYSICAL_ID_COUNT)
		return -EINVAL;

	if (!svm->vcpu.arch.apic->regs)
		return -EINVAL;

	svm->avic_backing_page = virt_to_page(svm->vcpu.arch.apic->regs);

	/* Setting AVIC backing page address in the phy APIC ID table */
	entry = avic_get_physical_id_entry(vcpu, id);
	if (!entry)
		return -EINVAL;

1714 1715 1716
	new_entry = __sme_set((page_to_phys(svm->avic_backing_page) &
			      AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK) |
			      AVIC_PHYSICAL_ID_ENTRY_VALID_MASK);
1717 1718 1719 1720 1721 1722 1723
	WRITE_ONCE(*entry, new_entry);

	svm->avic_physical_id_cache = entry;

	return 0;
}

B
Brijesh Singh 已提交
1724 1725
static void __sev_asid_free(int asid)
{
1726 1727
	struct svm_cpu_data *sd;
	int cpu, pos;
B
Brijesh Singh 已提交
1728 1729 1730

	pos = asid - 1;
	clear_bit(pos, sev_asid_bitmap);
1731 1732 1733 1734 1735

	for_each_possible_cpu(cpu) {
		sd = per_cpu(svm_data, cpu);
		sd->sev_vmcbs[pos] = NULL;
	}
B
Brijesh Singh 已提交
1736 1737 1738 1739
}

static void sev_asid_free(struct kvm *kvm)
{
1740
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
B
Brijesh Singh 已提交
1741 1742 1743 1744

	__sev_asid_free(sev->asid);
}

1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775
static void sev_unbind_asid(struct kvm *kvm, unsigned int handle)
{
	struct sev_data_decommission *decommission;
	struct sev_data_deactivate *data;

	if (!handle)
		return;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (!data)
		return;

	/* deactivate handle */
	data->handle = handle;
	sev_guest_deactivate(data, NULL);

	wbinvd_on_all_cpus();
	sev_guest_df_flush(NULL);
	kfree(data);

	decommission = kzalloc(sizeof(*decommission), GFP_KERNEL);
	if (!decommission)
		return;

	/* decommission handle */
	decommission->handle = handle;
	sev_guest_decommission(decommission, NULL);

	kfree(decommission);
}

1776 1777 1778 1779
static struct page **sev_pin_memory(struct kvm *kvm, unsigned long uaddr,
				    unsigned long ulen, unsigned long *n,
				    int write)
{
1780
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1781 1782 1783
	unsigned long npages, npinned, size;
	unsigned long locked, lock_limit;
	struct page **pages;
1784 1785 1786 1787
	unsigned long first, last;

	if (ulen == 0 || uaddr + ulen < uaddr)
		return NULL;
1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803

	/* Calculate number of pages. */
	first = (uaddr & PAGE_MASK) >> PAGE_SHIFT;
	last = ((uaddr + ulen - 1) & PAGE_MASK) >> PAGE_SHIFT;
	npages = (last - first + 1);

	locked = sev->pages_locked + npages;
	lock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
	if (locked > lock_limit && !capable(CAP_IPC_LOCK)) {
		pr_err("SEV: %lu locked pages exceed the lock limit of %lu.\n", locked, lock_limit);
		return NULL;
	}

	/* Avoid using vmalloc for smaller buffers. */
	size = npages * sizeof(struct page *);
	if (size > PAGE_SIZE)
1804 1805
		pages = __vmalloc(size, GFP_KERNEL_ACCOUNT | __GFP_ZERO,
				  PAGE_KERNEL);
1806
	else
1807
		pages = kmalloc(size, GFP_KERNEL_ACCOUNT);
1808 1809 1810 1811 1812

	if (!pages)
		return NULL;

	/* Pin the user virtual address. */
1813
	npinned = get_user_pages_fast(uaddr, npages, FOLL_WRITE, pages);
1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834
	if (npinned != npages) {
		pr_err("SEV: Failure locking %lu pages.\n", npages);
		goto err;
	}

	*n = npages;
	sev->pages_locked = locked;

	return pages;

err:
	if (npinned > 0)
		release_pages(pages, npinned);

	kvfree(pages);
	return NULL;
}

static void sev_unpin_memory(struct kvm *kvm, struct page **pages,
			     unsigned long npages)
{
1835
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856

	release_pages(pages, npages);
	kvfree(pages);
	sev->pages_locked -= npages;
}

static void sev_clflush_pages(struct page *pages[], unsigned long npages)
{
	uint8_t *page_virtual;
	unsigned long i;

	if (npages == 0 || pages == NULL)
		return;

	for (i = 0; i < npages; i++) {
		page_virtual = kmap_atomic(pages[i]);
		clflush_cache_range(page_virtual, PAGE_SIZE);
		kunmap_atomic(page_virtual);
	}
}

1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872
static void __unregister_enc_region_locked(struct kvm *kvm,
					   struct enc_region *region)
{
	/*
	 * The guest may change the memory encryption attribute from C=0 -> C=1
	 * or vice versa for this memory range. Lets make sure caches are
	 * flushed to ensure that guest data gets written into memory with
	 * correct C-bit.
	 */
	sev_clflush_pages(region->pages, region->npages);

	sev_unpin_memory(kvm, region->pages, region->npages);
	list_del(&region->list);
	kfree(region);
}

1873 1874
static struct kvm *svm_vm_alloc(void)
{
1875 1876 1877
	struct kvm_svm *kvm_svm = __vmalloc(sizeof(struct kvm_svm),
					    GFP_KERNEL_ACCOUNT | __GFP_ZERO,
					    PAGE_KERNEL);
1878
	return &kvm_svm->kvm;
1879 1880 1881 1882
}

static void svm_vm_free(struct kvm *kvm)
{
1883
	vfree(to_kvm_svm(kvm));
1884 1885
}

B
Brijesh Singh 已提交
1886 1887
static void sev_vm_destroy(struct kvm *kvm)
{
1888
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1889 1890
	struct list_head *head = &sev->regions_list;
	struct list_head *pos, *q;
1891

B
Brijesh Singh 已提交
1892 1893 1894
	if (!sev_guest(kvm))
		return;

1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909
	mutex_lock(&kvm->lock);

	/*
	 * if userspace was terminated before unregistering the memory regions
	 * then lets unpin all the registered memory.
	 */
	if (!list_empty(head)) {
		list_for_each_safe(pos, q, head) {
			__unregister_enc_region_locked(kvm,
				list_entry(pos, struct enc_region, list));
		}
	}

	mutex_unlock(&kvm->lock);

1910
	sev_unbind_asid(kvm, sev->handle);
B
Brijesh Singh 已提交
1911 1912 1913
	sev_asid_free(kvm);
}

1914 1915
static void avic_vm_destroy(struct kvm *kvm)
{
1916
	unsigned long flags;
1917
	struct kvm_svm *kvm_svm = to_kvm_svm(kvm);
1918

1919 1920 1921
	if (!avic)
		return;

1922 1923 1924 1925
	if (kvm_svm->avic_logical_id_table_page)
		__free_page(kvm_svm->avic_logical_id_table_page);
	if (kvm_svm->avic_physical_id_table_page)
		__free_page(kvm_svm->avic_physical_id_table_page);
1926 1927

	spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
1928
	hash_del(&kvm_svm->hnode);
1929
	spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);
1930 1931
}

B
Brijesh Singh 已提交
1932 1933 1934 1935 1936 1937
static void svm_vm_destroy(struct kvm *kvm)
{
	avic_vm_destroy(kvm);
	sev_vm_destroy(kvm);
}

1938 1939
static int avic_vm_init(struct kvm *kvm)
{
1940
	unsigned long flags;
1941
	int err = -ENOMEM;
1942 1943
	struct kvm_svm *kvm_svm = to_kvm_svm(kvm);
	struct kvm_svm *k2;
1944 1945
	struct page *p_page;
	struct page *l_page;
1946
	u32 vm_id;
1947 1948 1949 1950 1951

	if (!avic)
		return 0;

	/* Allocating physical APIC ID table (4KB) */
1952
	p_page = alloc_page(GFP_KERNEL_ACCOUNT);
1953 1954 1955
	if (!p_page)
		goto free_avic;

1956
	kvm_svm->avic_physical_id_table_page = p_page;
1957 1958 1959
	clear_page(page_address(p_page));

	/* Allocating logical APIC ID table (4KB) */
1960
	l_page = alloc_page(GFP_KERNEL_ACCOUNT);
1961 1962 1963
	if (!l_page)
		goto free_avic;

1964
	kvm_svm->avic_logical_id_table_page = l_page;
1965 1966
	clear_page(page_address(l_page));

1967
	spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
1968 1969 1970 1971 1972 1973 1974 1975
 again:
	vm_id = next_vm_id = (next_vm_id + 1) & AVIC_VM_ID_MASK;
	if (vm_id == 0) { /* id is 1-based, zero is not okay */
		next_vm_id_wrapped = 1;
		goto again;
	}
	/* Is it still in use? Only possible if wrapped at least once */
	if (next_vm_id_wrapped) {
1976 1977
		hash_for_each_possible(svm_vm_data_hash, k2, hnode, vm_id) {
			if (k2->avic_vm_id == vm_id)
1978 1979 1980
				goto again;
		}
	}
1981 1982
	kvm_svm->avic_vm_id = vm_id;
	hash_add(svm_vm_data_hash, &kvm_svm->hnode, kvm_svm->avic_vm_id);
1983 1984
	spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);

1985 1986 1987 1988 1989
	return 0;

free_avic:
	avic_vm_destroy(kvm);
	return err;
A
Avi Kivity 已提交
1990 1991
}

1992 1993
static inline int
avic_update_iommu_vcpu_affinity(struct kvm_vcpu *vcpu, int cpu, bool r)
1994
{
1995 1996 1997
	int ret = 0;
	unsigned long flags;
	struct amd_svm_iommu_ir *ir;
1998 1999
	struct vcpu_svm *svm = to_svm(vcpu);

2000 2001
	if (!kvm_arch_has_assigned_device(vcpu->kvm))
		return 0;
2002

2003 2004 2005 2006 2007
	/*
	 * Here, we go through the per-vcpu ir_list to update all existing
	 * interrupt remapping table entry targeting this vcpu.
	 */
	spin_lock_irqsave(&svm->ir_list_lock, flags);
2008

2009 2010
	if (list_empty(&svm->ir_list))
		goto out;
2011

2012 2013 2014 2015 2016 2017 2018 2019
	list_for_each_entry(ir, &svm->ir_list, node) {
		ret = amd_iommu_update_ga(cpu, r, ir->data);
		if (ret)
			break;
	}
out:
	spin_unlock_irqrestore(&svm->ir_list_lock, flags);
	return ret;
2020 2021 2022 2023 2024 2025
}

static void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
	u64 entry;
	/* ID = 0xff (broadcast), ID > 0xff (reserved) */
2026
	int h_physical_id = kvm_cpu_get_apicid(cpu);
2027 2028 2029 2030 2031
	struct vcpu_svm *svm = to_svm(vcpu);

	if (!kvm_vcpu_apicv_active(vcpu))
		return;

2032 2033 2034 2035 2036
	/*
	 * Since the host physical APIC id is 8 bits,
	 * we can support host APIC ID upto 255.
	 */
	if (WARN_ON(h_physical_id > AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK))
2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049
		return;

	entry = READ_ONCE(*(svm->avic_physical_id_cache));
	WARN_ON(entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK);

	entry &= ~AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK;
	entry |= (h_physical_id & AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK);

	entry &= ~AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK;
	if (svm->avic_is_running)
		entry |= AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK;

	WRITE_ONCE(*(svm->avic_physical_id_cache), entry);
2050 2051
	avic_update_iommu_vcpu_affinity(vcpu, h_physical_id,
					svm->avic_is_running);
2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062
}

static void avic_vcpu_put(struct kvm_vcpu *vcpu)
{
	u64 entry;
	struct vcpu_svm *svm = to_svm(vcpu);

	if (!kvm_vcpu_apicv_active(vcpu))
		return;

	entry = READ_ONCE(*(svm->avic_physical_id_cache));
2063 2064 2065
	if (entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK)
		avic_update_iommu_vcpu_affinity(vcpu, -1, 0);

2066 2067
	entry &= ~AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK;
	WRITE_ONCE(*(svm->avic_physical_id_cache), entry);
A
Avi Kivity 已提交
2068 2069
}

2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083
/**
 * This function is called during VCPU halt/unhalt.
 */
static void avic_set_running(struct kvm_vcpu *vcpu, bool is_run)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	svm->avic_is_running = is_run;
	if (is_run)
		avic_vcpu_load(vcpu, vcpu->cpu);
	else
		avic_vcpu_put(vcpu);
}

2084
static void svm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event)
2085 2086
{
	struct vcpu_svm *svm = to_svm(vcpu);
2087 2088
	u32 dummy;
	u32 eax = 1;
2089

2090
	vcpu->arch.microcode_version = 0x01000065;
2091
	svm->spec_ctrl = 0;
2092
	svm->virt_spec_ctrl = 0;
2093

2094 2095 2096 2097 2098 2099
	if (!init_event) {
		svm->vcpu.arch.apic_base = APIC_DEFAULT_PHYS_BASE |
					   MSR_IA32_APICBASE_ENABLE;
		if (kvm_vcpu_is_reset_bsp(&svm->vcpu))
			svm->vcpu.arch.apic_base |= MSR_IA32_APICBASE_BSP;
	}
P
Paolo Bonzini 已提交
2100
	init_vmcb(svm);
A
Avi Kivity 已提交
2101

2102
	kvm_cpuid(vcpu, &eax, &dummy, &dummy, &dummy, true);
2103
	kvm_rdx_write(vcpu, eax);
2104 2105 2106

	if (kvm_vcpu_apicv_active(vcpu) && !init_event)
		avic_update_vapic_bar(svm, APIC_DEFAULT_PHYS_BASE);
2107 2108
}

2109 2110 2111 2112
static int avic_init_vcpu(struct vcpu_svm *svm)
{
	int ret;

2113
	if (!kvm_vcpu_apicv_active(&svm->vcpu))
2114 2115 2116 2117 2118 2119 2120 2121
		return 0;

	ret = avic_init_backing_page(&svm->vcpu);
	if (ret)
		return ret;

	INIT_LIST_HEAD(&svm->ir_list);
	spin_lock_init(&svm->ir_list_lock);
2122
	svm->dfr_reg = APIC_DFR_FLAT;
2123 2124 2125 2126

	return ret;
}

R
Rusty Russell 已提交
2127
static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
A
Avi Kivity 已提交
2128
{
2129
	struct vcpu_svm *svm;
A
Avi Kivity 已提交
2130
	struct page *page;
2131
	struct page *msrpm_pages;
A
Alexander Graf 已提交
2132
	struct page *hsave_page;
A
Alexander Graf 已提交
2133
	struct page *nested_msrpm_pages;
R
Rusty Russell 已提交
2134
	int err;
A
Avi Kivity 已提交
2135

2136 2137 2138
	BUILD_BUG_ON_MSG(offsetof(struct vcpu_svm, vcpu) != 0,
		"struct kvm_vcpu must be at offset 0 for arch usercopy region");

2139
	svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL_ACCOUNT);
R
Rusty Russell 已提交
2140 2141 2142 2143 2144
	if (!svm) {
		err = -ENOMEM;
		goto out;
	}

2145 2146 2147 2148 2149 2150 2151 2152
	svm->vcpu.arch.user_fpu = kmem_cache_zalloc(x86_fpu_cache,
						     GFP_KERNEL_ACCOUNT);
	if (!svm->vcpu.arch.user_fpu) {
		printk(KERN_ERR "kvm: failed to allocate kvm userspace's fpu\n");
		err = -ENOMEM;
		goto free_partial_svm;
	}

2153 2154
	svm->vcpu.arch.guest_fpu = kmem_cache_zalloc(x86_fpu_cache,
						     GFP_KERNEL_ACCOUNT);
2155 2156 2157
	if (!svm->vcpu.arch.guest_fpu) {
		printk(KERN_ERR "kvm: failed to allocate vcpu's fpu\n");
		err = -ENOMEM;
2158
		goto free_user_fpu;
2159 2160
	}

R
Rusty Russell 已提交
2161 2162 2163 2164
	err = kvm_vcpu_init(&svm->vcpu, kvm, id);
	if (err)
		goto free_svm;

2165
	err = -ENOMEM;
2166
	page = alloc_page(GFP_KERNEL_ACCOUNT);
2167
	if (!page)
R
Rusty Russell 已提交
2168
		goto uninit;
A
Avi Kivity 已提交
2169

2170
	msrpm_pages = alloc_pages(GFP_KERNEL_ACCOUNT, MSRPM_ALLOC_ORDER);
2171
	if (!msrpm_pages)
2172
		goto free_page1;
A
Alexander Graf 已提交
2173

2174
	nested_msrpm_pages = alloc_pages(GFP_KERNEL_ACCOUNT, MSRPM_ALLOC_ORDER);
A
Alexander Graf 已提交
2175
	if (!nested_msrpm_pages)
2176
		goto free_page2;
2177

2178
	hsave_page = alloc_page(GFP_KERNEL_ACCOUNT);
A
Alexander Graf 已提交
2179
	if (!hsave_page)
2180 2181
		goto free_page3;

2182 2183 2184
	err = avic_init_vcpu(svm);
	if (err)
		goto free_page4;
2185

2186 2187 2188 2189 2190
	/* We initialize this flag to true to make sure that the is_running
	 * bit would be set the first time the vcpu is loaded.
	 */
	svm->avic_is_running = true;

2191
	svm->nested.hsave = page_address(hsave_page);
A
Alexander Graf 已提交
2192

2193 2194 2195
	svm->msrpm = page_address(msrpm_pages);
	svm_vcpu_init_msrpm(svm->msrpm);

2196
	svm->nested.msrpm = page_address(nested_msrpm_pages);
2197
	svm_vcpu_init_msrpm(svm->nested.msrpm);
A
Alexander Graf 已提交
2198

2199 2200
	svm->vmcb = page_address(page);
	clear_page(svm->vmcb);
2201
	svm->vmcb_pa = __sme_set(page_to_pfn(page) << PAGE_SHIFT);
2202
	svm->asid_generation = 0;
P
Paolo Bonzini 已提交
2203
	init_vmcb(svm);
A
Avi Kivity 已提交
2204

2205 2206
	svm_init_osvw(&svm->vcpu);

R
Rusty Russell 已提交
2207
	return &svm->vcpu;
2208

2209 2210
free_page4:
	__free_page(hsave_page);
2211 2212 2213 2214 2215 2216
free_page3:
	__free_pages(nested_msrpm_pages, MSRPM_ALLOC_ORDER);
free_page2:
	__free_pages(msrpm_pages, MSRPM_ALLOC_ORDER);
free_page1:
	__free_page(page);
R
Rusty Russell 已提交
2217 2218 2219
uninit:
	kvm_vcpu_uninit(&svm->vcpu);
free_svm:
2220
	kmem_cache_free(x86_fpu_cache, svm->vcpu.arch.guest_fpu);
2221 2222
free_user_fpu:
	kmem_cache_free(x86_fpu_cache, svm->vcpu.arch.user_fpu);
2223
free_partial_svm:
2224
	kmem_cache_free(kvm_vcpu_cache, svm);
R
Rusty Russell 已提交
2225 2226
out:
	return ERR_PTR(err);
A
Avi Kivity 已提交
2227 2228
}

2229 2230 2231 2232 2233 2234 2235 2236
static void svm_clear_current_vmcb(struct vmcb *vmcb)
{
	int i;

	for_each_online_cpu(i)
		cmpxchg(&per_cpu(svm_data, i)->current_vmcb, vmcb, NULL);
}

A
Avi Kivity 已提交
2237 2238
static void svm_free_vcpu(struct kvm_vcpu *vcpu)
{
2239 2240
	struct vcpu_svm *svm = to_svm(vcpu);

2241 2242 2243 2244 2245 2246 2247
	/*
	 * The vmcb page can be recycled, causing a false negative in
	 * svm_vcpu_load(). So, ensure that no logical CPU has this
	 * vmcb page recorded as its current vmcb.
	 */
	svm_clear_current_vmcb(svm->vmcb);

2248
	__free_page(pfn_to_page(__sme_clr(svm->vmcb_pa) >> PAGE_SHIFT));
2249
	__free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER);
2250 2251
	__free_page(virt_to_page(svm->nested.hsave));
	__free_pages(virt_to_page(svm->nested.msrpm), MSRPM_ALLOC_ORDER);
R
Rusty Russell 已提交
2252
	kvm_vcpu_uninit(vcpu);
2253
	kmem_cache_free(x86_fpu_cache, svm->vcpu.arch.user_fpu);
2254
	kmem_cache_free(x86_fpu_cache, svm->vcpu.arch.guest_fpu);
2255
	kmem_cache_free(kvm_vcpu_cache, svm);
A
Avi Kivity 已提交
2256 2257
}

2258
static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
A
Avi Kivity 已提交
2259
{
2260
	struct vcpu_svm *svm = to_svm(vcpu);
A
Ashok Raj 已提交
2261
	struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
2262
	int i;
2263 2264

	if (unlikely(cpu != vcpu->cpu)) {
2265
		svm->asid_generation = 0;
2266
		mark_all_dirty(svm->vmcb);
2267
	}
2268

2269 2270 2271
#ifdef CONFIG_X86_64
	rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host.gs_base);
#endif
2272 2273 2274 2275
	savesegment(fs, svm->host.fs);
	savesegment(gs, svm->host.gs);
	svm->host.ldt = kvm_read_ldt();

2276
	for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
2277
		rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
2278

2279 2280 2281 2282 2283 2284
	if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) {
		u64 tsc_ratio = vcpu->arch.tsc_scaling_ratio;
		if (tsc_ratio != __this_cpu_read(current_tsc_ratio)) {
			__this_cpu_write(current_tsc_ratio, tsc_ratio);
			wrmsrl(MSR_AMD64_TSC_RATIO, tsc_ratio);
		}
2285
	}
P
Paolo Bonzini 已提交
2286 2287 2288
	/* This assumes that the kernel never uses MSR_TSC_AUX */
	if (static_cpu_has(X86_FEATURE_RDTSCP))
		wrmsrl(MSR_TSC_AUX, svm->tsc_aux);
2289

A
Ashok Raj 已提交
2290 2291 2292 2293
	if (sd->current_vmcb != svm->vmcb) {
		sd->current_vmcb = svm->vmcb;
		indirect_branch_prediction_barrier();
	}
2294
	avic_vcpu_load(vcpu, cpu);
A
Avi Kivity 已提交
2295 2296 2297 2298
}

static void svm_vcpu_put(struct kvm_vcpu *vcpu)
{
2299
	struct vcpu_svm *svm = to_svm(vcpu);
2300 2301
	int i;

2302 2303
	avic_vcpu_put(vcpu);

2304
	++vcpu->stat.host_state_reload;
2305 2306 2307
	kvm_load_ldt(svm->host.ldt);
#ifdef CONFIG_X86_64
	loadsegment(fs, svm->host.fs);
2308
	wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gsbase);
2309
	load_gs_index(svm->host.gs);
2310
#else
2311
#ifdef CONFIG_X86_32_LAZY_GS
2312
	loadsegment(gs, svm->host.gs);
2313
#endif
2314
#endif
2315
	for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
2316
		wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
A
Avi Kivity 已提交
2317 2318
}

2319 2320 2321 2322 2323 2324 2325 2326 2327 2328
static void svm_vcpu_blocking(struct kvm_vcpu *vcpu)
{
	avic_set_running(vcpu, false);
}

static void svm_vcpu_unblocking(struct kvm_vcpu *vcpu)
{
	avic_set_running(vcpu, true);
}

A
Avi Kivity 已提交
2329 2330
static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
{
2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341
	struct vcpu_svm *svm = to_svm(vcpu);
	unsigned long rflags = svm->vmcb->save.rflags;

	if (svm->nmi_singlestep) {
		/* Hide our flags if they were not set by the guest */
		if (!(svm->nmi_singlestep_guest_rflags & X86_EFLAGS_TF))
			rflags &= ~X86_EFLAGS_TF;
		if (!(svm->nmi_singlestep_guest_rflags & X86_EFLAGS_RF))
			rflags &= ~X86_EFLAGS_RF;
	}
	return rflags;
A
Avi Kivity 已提交
2342 2343 2344 2345
}

static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
{
2346 2347 2348
	if (to_svm(vcpu)->nmi_singlestep)
		rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);

P
Paolo Bonzini 已提交
2349
       /*
A
Andrea Gelmini 已提交
2350
        * Any change of EFLAGS.VM is accompanied by a reload of SS
P
Paolo Bonzini 已提交
2351 2352 2353
        * (caused by either a task switch or an inter-privilege IRET),
        * so we do not need to update the CPL here.
        */
2354
	to_svm(vcpu)->vmcb->save.rflags = rflags;
A
Avi Kivity 已提交
2355 2356
}

A
Avi Kivity 已提交
2357 2358 2359 2360 2361
static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
{
	switch (reg) {
	case VCPU_EXREG_PDPTR:
		BUG_ON(!npt_enabled);
2362
		load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu));
A
Avi Kivity 已提交
2363 2364 2365 2366 2367 2368
		break;
	default:
		BUG();
	}
}

2369 2370
static void svm_set_vintr(struct vcpu_svm *svm)
{
2371
	set_intercept(svm, INTERCEPT_VINTR);
2372 2373 2374 2375
}

static void svm_clear_vintr(struct vcpu_svm *svm)
{
2376
	clr_intercept(svm, INTERCEPT_VINTR);
2377 2378
}

A
Avi Kivity 已提交
2379 2380
static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
{
2381
	struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
A
Avi Kivity 已提交
2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393

	switch (seg) {
	case VCPU_SREG_CS: return &save->cs;
	case VCPU_SREG_DS: return &save->ds;
	case VCPU_SREG_ES: return &save->es;
	case VCPU_SREG_FS: return &save->fs;
	case VCPU_SREG_GS: return &save->gs;
	case VCPU_SREG_SS: return &save->ss;
	case VCPU_SREG_TR: return &save->tr;
	case VCPU_SREG_LDTR: return &save->ldtr;
	}
	BUG();
A
Al Viro 已提交
2394
	return NULL;
A
Avi Kivity 已提交
2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418
}

static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg)
{
	struct vmcb_seg *s = svm_seg(vcpu, seg);

	return s->base;
}

static void svm_get_segment(struct kvm_vcpu *vcpu,
			    struct kvm_segment *var, int seg)
{
	struct vmcb_seg *s = svm_seg(vcpu, seg);

	var->base = s->base;
	var->limit = s->limit;
	var->selector = s->selector;
	var->type = s->attrib & SVM_SELECTOR_TYPE_MASK;
	var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1;
	var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3;
	var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1;
	var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1;
	var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
	var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
2419 2420 2421 2422 2423 2424 2425 2426 2427 2428

	/*
	 * AMD CPUs circa 2014 track the G bit for all segments except CS.
	 * However, the SVM spec states that the G bit is not observed by the
	 * CPU, and some VMware virtual CPUs drop the G bit for all segments.
	 * So let's synthesize a legal G bit for all segments, this helps
	 * running KVM nested. It also helps cross-vendor migration, because
	 * Intel's vmentry has a check on the 'G' bit.
	 */
	var->g = s->limit > 0xfffff;
2429

J
Joerg Roedel 已提交
2430 2431
	/*
	 * AMD's VMCB does not have an explicit unusable field, so emulate it
2432 2433
	 * for cross vendor migration purposes by "not present"
	 */
2434
	var->unusable = !var->present;
2435

2436 2437 2438 2439 2440 2441
	switch (seg) {
	case VCPU_SREG_TR:
		/*
		 * Work around a bug where the busy flag in the tr selector
		 * isn't exposed
		 */
2442
		var->type |= 0x2;
2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457
		break;
	case VCPU_SREG_DS:
	case VCPU_SREG_ES:
	case VCPU_SREG_FS:
	case VCPU_SREG_GS:
		/*
		 * The accessed bit must always be set in the segment
		 * descriptor cache, although it can be cleared in the
		 * descriptor, the cached bit always remains at 1. Since
		 * Intel has a check on this, set it here to support
		 * cross-vendor migration.
		 */
		if (!var->unusable)
			var->type |= 0x1;
		break;
2458
	case VCPU_SREG_SS:
J
Joerg Roedel 已提交
2459 2460
		/*
		 * On AMD CPUs sometimes the DB bit in the segment
2461 2462 2463 2464 2465 2466
		 * descriptor is left as 1, although the whole segment has
		 * been made unusable. Clear it here to pass an Intel VMX
		 * entry check when cross vendor migrating.
		 */
		if (var->unusable)
			var->db = 0;
2467
		/* This is symmetric with svm_set_segment() */
J
Jan Kiszka 已提交
2468
		var->dpl = to_svm(vcpu)->vmcb->save.cpl;
2469
		break;
2470
	}
A
Avi Kivity 已提交
2471 2472
}

2473 2474 2475 2476 2477 2478 2479
static int svm_get_cpl(struct kvm_vcpu *vcpu)
{
	struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;

	return save->cpl;
}

2480
static void svm_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2481
{
2482 2483
	struct vcpu_svm *svm = to_svm(vcpu);

2484 2485
	dt->size = svm->vmcb->save.idtr.limit;
	dt->address = svm->vmcb->save.idtr.base;
A
Avi Kivity 已提交
2486 2487
}

2488
static void svm_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2489
{
2490 2491
	struct vcpu_svm *svm = to_svm(vcpu);

2492 2493
	svm->vmcb->save.idtr.limit = dt->size;
	svm->vmcb->save.idtr.base = dt->address ;
2494
	mark_dirty(svm->vmcb, VMCB_DT);
A
Avi Kivity 已提交
2495 2496
}

2497
static void svm_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2498
{
2499 2500
	struct vcpu_svm *svm = to_svm(vcpu);

2501 2502
	dt->size = svm->vmcb->save.gdtr.limit;
	dt->address = svm->vmcb->save.gdtr.base;
A
Avi Kivity 已提交
2503 2504
}

2505
static void svm_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2506
{
2507 2508
	struct vcpu_svm *svm = to_svm(vcpu);

2509 2510
	svm->vmcb->save.gdtr.limit = dt->size;
	svm->vmcb->save.gdtr.base = dt->address ;
2511
	mark_dirty(svm->vmcb, VMCB_DT);
A
Avi Kivity 已提交
2512 2513
}

2514 2515 2516 2517
static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
{
}

2518 2519 2520 2521
static void svm_decache_cr3(struct kvm_vcpu *vcpu)
{
}

2522
static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
2523 2524 2525
{
}

A
Avi Kivity 已提交
2526 2527 2528 2529 2530
static void update_cr0_intercept(struct vcpu_svm *svm)
{
	ulong gcr0 = svm->vcpu.arch.cr0;
	u64 *hcr0 = &svm->vmcb->save.cr0;

2531 2532
	*hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK)
		| (gcr0 & SVM_CR0_SELECTIVE_MASK);
A
Avi Kivity 已提交
2533

2534
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
2535

2536
	if (gcr0 == *hcr0) {
2537 2538
		clr_cr_intercept(svm, INTERCEPT_CR0_READ);
		clr_cr_intercept(svm, INTERCEPT_CR0_WRITE);
A
Avi Kivity 已提交
2539
	} else {
2540 2541
		set_cr_intercept(svm, INTERCEPT_CR0_READ);
		set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
A
Avi Kivity 已提交
2542 2543 2544
	}
}

A
Avi Kivity 已提交
2545 2546
static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
{
2547 2548
	struct vcpu_svm *svm = to_svm(vcpu);

2549
#ifdef CONFIG_X86_64
2550
	if (vcpu->arch.efer & EFER_LME) {
2551
		if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
2552
			vcpu->arch.efer |= EFER_LMA;
2553
			svm->vmcb->save.efer |= EFER_LMA | EFER_LME;
A
Avi Kivity 已提交
2554 2555
		}

M
Mike Day 已提交
2556
		if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) {
2557
			vcpu->arch.efer &= ~EFER_LMA;
2558
			svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME);
A
Avi Kivity 已提交
2559 2560 2561
		}
	}
#endif
2562
	vcpu->arch.cr0 = cr0;
2563 2564 2565

	if (!npt_enabled)
		cr0 |= X86_CR0_PG | X86_CR0_WP;
2566

2567 2568 2569 2570 2571 2572 2573
	/*
	 * re-enable caching here because the QEMU bios
	 * does not do it - this results in some delay at
	 * reboot
	 */
	if (kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_CD_NW_CLEARED))
		cr0 &= ~(X86_CR0_CD | X86_CR0_NW);
2574
	svm->vmcb->save.cr0 = cr0;
2575
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
2576
	update_cr0_intercept(svm);
A
Avi Kivity 已提交
2577 2578
}

2579
static int svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
A
Avi Kivity 已提交
2580
{
2581
	unsigned long host_cr4_mce = cr4_read_shadow() & X86_CR4_MCE;
2582 2583
	unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4;

2584 2585 2586
	if (cr4 & X86_CR4_VMXE)
		return 1;

2587
	if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE))
2588
		svm_flush_tlb(vcpu, true);
2589

2590 2591 2592
	vcpu->arch.cr4 = cr4;
	if (!npt_enabled)
		cr4 |= X86_CR4_PAE;
2593
	cr4 |= host_cr4_mce;
2594
	to_svm(vcpu)->vmcb->save.cr4 = cr4;
2595
	mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
2596
	return 0;
A
Avi Kivity 已提交
2597 2598 2599 2600 2601
}

static void svm_set_segment(struct kvm_vcpu *vcpu,
			    struct kvm_segment *var, int seg)
{
2602
	struct vcpu_svm *svm = to_svm(vcpu);
A
Avi Kivity 已提交
2603 2604 2605 2606 2607
	struct vmcb_seg *s = svm_seg(vcpu, seg);

	s->base = var->base;
	s->limit = var->limit;
	s->selector = var->selector;
2608 2609 2610 2611 2612 2613 2614 2615
	s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK);
	s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT;
	s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT;
	s->attrib |= ((var->present & 1) && !var->unusable) << SVM_SELECTOR_P_SHIFT;
	s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT;
	s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT;
	s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
	s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
P
Paolo Bonzini 已提交
2616 2617 2618 2619 2620 2621 2622 2623

	/*
	 * This is always accurate, except if SYSRET returned to a segment
	 * with SS.DPL != 3.  Intel does not have this quirk, and always
	 * forces SS.DPL to 3 on sysret, so we ignore that case; fixing it
	 * would entail passing the CPL to userspace and back.
	 */
	if (seg == VCPU_SREG_SS)
2624 2625
		/* This is symmetric with svm_get_segment() */
		svm->vmcb->save.cpl = (var->dpl & 3);
A
Avi Kivity 已提交
2626

2627
	mark_dirty(svm->vmcb, VMCB_SEG);
A
Avi Kivity 已提交
2628 2629
}

2630
static void update_bp_intercept(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
2631
{
J
Jan Kiszka 已提交
2632 2633
	struct vcpu_svm *svm = to_svm(vcpu);

2634
	clr_exception_intercept(svm, BP_VECTOR);
2635

J
Jan Kiszka 已提交
2636 2637
	if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) {
		if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
2638
			set_exception_intercept(svm, BP_VECTOR);
J
Jan Kiszka 已提交
2639 2640
	} else
		vcpu->guest_debug = 0;
2641 2642
}

2643
static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd)
A
Avi Kivity 已提交
2644
{
2645 2646
	if (sd->next_asid > sd->max_asid) {
		++sd->asid_generation;
2647
		sd->next_asid = sd->min_asid;
2648
		svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
A
Avi Kivity 已提交
2649 2650
	}

2651 2652
	svm->asid_generation = sd->asid_generation;
	svm->vmcb->control.asid = sd->next_asid++;
2653 2654

	mark_dirty(svm->vmcb, VMCB_ASID);
A
Avi Kivity 已提交
2655 2656
}

J
Jan Kiszka 已提交
2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669
static u64 svm_get_dr6(struct kvm_vcpu *vcpu)
{
	return to_svm(vcpu)->vmcb->save.dr6;
}

static void svm_set_dr6(struct kvm_vcpu *vcpu, unsigned long value)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	svm->vmcb->save.dr6 = value;
	mark_dirty(svm->vmcb, VMCB_DR);
}

2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684
static void svm_sync_dirty_debug_regs(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	get_debugreg(vcpu->arch.db[0], 0);
	get_debugreg(vcpu->arch.db[1], 1);
	get_debugreg(vcpu->arch.db[2], 2);
	get_debugreg(vcpu->arch.db[3], 3);
	vcpu->arch.dr6 = svm_get_dr6(vcpu);
	vcpu->arch.dr7 = svm->vmcb->save.dr7;

	vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_WONT_EXIT;
	set_dr_intercepts(svm);
}

2685
static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value)
A
Avi Kivity 已提交
2686
{
2687 2688
	struct vcpu_svm *svm = to_svm(vcpu);

2689
	svm->vmcb->save.dr7 = value;
2690
	mark_dirty(svm->vmcb, VMCB_DR);
A
Avi Kivity 已提交
2691 2692
}

A
Avi Kivity 已提交
2693
static int pf_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2694
{
2695
	u64 fault_address = __sme_clr(svm->vmcb->control.exit_info_2);
2696
	u64 error_code = svm->vmcb->control.exit_info_1;
A
Avi Kivity 已提交
2697

2698
	return kvm_handle_page_fault(&svm->vcpu, error_code, fault_address,
2699 2700
			static_cpu_has(X86_FEATURE_DECODEASSISTS) ?
			svm->vmcb->control.insn_bytes : NULL,
2701 2702 2703 2704 2705
			svm->vmcb->control.insn_len);
}

static int npf_interception(struct vcpu_svm *svm)
{
2706
	u64 fault_address = __sme_clr(svm->vmcb->control.exit_info_2);
2707 2708 2709 2710
	u64 error_code = svm->vmcb->control.exit_info_1;

	trace_kvm_page_fault(fault_address, error_code);
	return kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code,
2711 2712
			static_cpu_has(X86_FEATURE_DECODEASSISTS) ?
			svm->vmcb->control.insn_bytes : NULL,
2713
			svm->vmcb->control.insn_len);
A
Avi Kivity 已提交
2714 2715
}

A
Avi Kivity 已提交
2716
static int db_interception(struct vcpu_svm *svm)
J
Jan Kiszka 已提交
2717
{
A
Avi Kivity 已提交
2718
	struct kvm_run *kvm_run = svm->vcpu.run;
2719
	struct kvm_vcpu *vcpu = &svm->vcpu;
A
Avi Kivity 已提交
2720

J
Jan Kiszka 已提交
2721
	if (!(svm->vcpu.guest_debug &
2722
	      (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) &&
J
Jan Kiszka 已提交
2723
		!svm->nmi_singlestep) {
J
Jan Kiszka 已提交
2724 2725 2726
		kvm_queue_exception(&svm->vcpu, DB_VECTOR);
		return 1;
	}
2727

J
Jan Kiszka 已提交
2728
	if (svm->nmi_singlestep) {
2729
		disable_nmi_singlestep(svm);
2730 2731
		/* Make sure we check for pending NMIs upon entry */
		kvm_make_request(KVM_REQ_EVENT, vcpu);
2732 2733 2734
	}

	if (svm->vcpu.guest_debug &
J
Joerg Roedel 已提交
2735
	    (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) {
2736 2737 2738 2739 2740 2741 2742 2743
		kvm_run->exit_reason = KVM_EXIT_DEBUG;
		kvm_run->debug.arch.pc =
			svm->vmcb->save.cs.base + svm->vmcb->save.rip;
		kvm_run->debug.arch.exception = DB_VECTOR;
		return 0;
	}

	return 1;
J
Jan Kiszka 已提交
2744 2745
}

A
Avi Kivity 已提交
2746
static int bp_interception(struct vcpu_svm *svm)
J
Jan Kiszka 已提交
2747
{
A
Avi Kivity 已提交
2748 2749
	struct kvm_run *kvm_run = svm->vcpu.run;

J
Jan Kiszka 已提交
2750 2751 2752 2753 2754 2755
	kvm_run->exit_reason = KVM_EXIT_DEBUG;
	kvm_run->debug.arch.pc = svm->vmcb->save.cs.base + svm->vmcb->save.rip;
	kvm_run->debug.arch.exception = BP_VECTOR;
	return 0;
}

A
Avi Kivity 已提交
2756
static int ud_interception(struct vcpu_svm *svm)
2757
{
W
Wanpeng Li 已提交
2758
	return handle_ud(&svm->vcpu);
2759 2760
}

2761 2762 2763 2764 2765 2766
static int ac_interception(struct vcpu_svm *svm)
{
	kvm_queue_exception_e(&svm->vcpu, AC_VECTOR, 0);
	return 1;
}

2767 2768 2769 2770 2771 2772 2773
static int gp_interception(struct vcpu_svm *svm)
{
	struct kvm_vcpu *vcpu = &svm->vcpu;
	u32 error_code = svm->vmcb->control.exit_info_1;

	WARN_ON_ONCE(!enable_vmware_backdoor);

2774 2775 2776 2777 2778 2779 2780 2781
	/*
	 * VMware backdoor emulation on #GP interception only handles IN{S},
	 * OUT{S}, and RDPMC, none of which generate a non-zero error code.
	 */
	if (error_code) {
		kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
		return 1;
	}
2782 2783
	return kvm_emulate_instruction(vcpu, EMULTYPE_VMWARE_GP) !=
						EMULATE_USER_EXIT;
2784 2785
}

2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824
static bool is_erratum_383(void)
{
	int err, i;
	u64 value;

	if (!erratum_383_found)
		return false;

	value = native_read_msr_safe(MSR_IA32_MC0_STATUS, &err);
	if (err)
		return false;

	/* Bit 62 may or may not be set for this mce */
	value &= ~(1ULL << 62);

	if (value != 0xb600000000010015ULL)
		return false;

	/* Clear MCi_STATUS registers */
	for (i = 0; i < 6; ++i)
		native_write_msr_safe(MSR_IA32_MCx_STATUS(i), 0, 0);

	value = native_read_msr_safe(MSR_IA32_MCG_STATUS, &err);
	if (!err) {
		u32 low, high;

		value &= ~(1ULL << 2);
		low    = lower_32_bits(value);
		high   = upper_32_bits(value);

		native_write_msr_safe(MSR_IA32_MCG_STATUS, low, high);
	}

	/* Flush tlb to evict multi-match entries */
	__flush_tlb_all();

	return true;
}

2825
static void svm_handle_mce(struct vcpu_svm *svm)
2826
{
2827 2828 2829 2830 2831 2832 2833
	if (is_erratum_383()) {
		/*
		 * Erratum 383 triggered. Guest state is corrupt so kill the
		 * guest.
		 */
		pr_err("KVM: Guest triggered AMD Erratum 383\n");

2834
		kvm_make_request(KVM_REQ_TRIPLE_FAULT, &svm->vcpu);
2835 2836 2837 2838

		return;
	}

2839 2840 2841 2842 2843 2844 2845 2846
	/*
	 * On an #MC intercept the MCE handler is not called automatically in
	 * the host. So do it by hand here.
	 */
	asm volatile (
		"int $0x12\n");
	/* not sure if we ever come back to this point */

2847 2848 2849 2850 2851
	return;
}

static int mc_interception(struct vcpu_svm *svm)
{
2852 2853 2854
	return 1;
}

A
Avi Kivity 已提交
2855
static int shutdown_interception(struct vcpu_svm *svm)
2856
{
A
Avi Kivity 已提交
2857 2858
	struct kvm_run *kvm_run = svm->vcpu.run;

2859 2860 2861 2862
	/*
	 * VMCB is undefined after a SHUTDOWN intercept
	 * so reinitialize it.
	 */
2863
	clear_page(svm->vmcb);
P
Paolo Bonzini 已提交
2864
	init_vmcb(svm);
2865 2866 2867 2868 2869

	kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
	return 0;
}

A
Avi Kivity 已提交
2870
static int io_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2871
{
2872
	struct kvm_vcpu *vcpu = &svm->vcpu;
M
Mike Day 已提交
2873
	u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */
2874
	int size, in, string;
2875
	unsigned port;
A
Avi Kivity 已提交
2876

R
Rusty Russell 已提交
2877
	++svm->vcpu.stat.io_exits;
2878
	string = (io_info & SVM_IOIO_STR_MASK) != 0;
2879
	in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
2880
	if (string)
2881
		return kvm_emulate_instruction(vcpu, 0) == EMULATE_DONE;
2882

2883 2884
	port = io_info >> 16;
	size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
2885 2886
	svm->next_rip = svm->vmcb->control.exit_info_2;

2887
	return kvm_fast_pio(&svm->vcpu, size, port, in);
A
Avi Kivity 已提交
2888 2889
}

A
Avi Kivity 已提交
2890
static int nmi_interception(struct vcpu_svm *svm)
2891 2892 2893 2894
{
	return 1;
}

A
Avi Kivity 已提交
2895
static int intr_interception(struct vcpu_svm *svm)
2896 2897 2898 2899 2900
{
	++svm->vcpu.stat.irq_exits;
	return 1;
}

A
Avi Kivity 已提交
2901
static int nop_on_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2902 2903 2904 2905
{
	return 1;
}

A
Avi Kivity 已提交
2906
static int halt_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2907
{
R
Rusty Russell 已提交
2908
	return kvm_emulate_halt(&svm->vcpu);
A
Avi Kivity 已提交
2909 2910
}

A
Avi Kivity 已提交
2911
static int vmmcall_interception(struct vcpu_svm *svm)
2912
{
2913
	return kvm_emulate_hypercall(&svm->vcpu);
2914 2915
}

2916 2917 2918 2919 2920 2921 2922
static unsigned long nested_svm_get_tdp_cr3(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	return svm->nested.nested_cr3;
}

2923 2924 2925 2926 2927 2928 2929
static u64 nested_svm_get_tdp_pdptr(struct kvm_vcpu *vcpu, int index)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u64 cr3 = svm->nested.nested_cr3;
	u64 pdpte;
	int ret;

2930
	ret = kvm_vcpu_read_guest_page(vcpu, gpa_to_gfn(__sme_clr(cr3)), &pdpte,
2931
				       offset_in_page(cr3) + index * 8, 8);
2932 2933 2934 2935 2936
	if (ret)
		return 0;
	return pdpte;
}

2937 2938 2939 2940 2941
static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu,
				   unsigned long root)
{
	struct vcpu_svm *svm = to_svm(vcpu);

2942
	svm->vmcb->control.nested_cr3 = __sme_set(root);
2943
	mark_dirty(svm->vmcb, VMCB_NPT);
2944 2945
}

2946 2947
static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu,
				       struct x86_exception *fault)
2948 2949 2950
{
	struct vcpu_svm *svm = to_svm(vcpu);

2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970
	if (svm->vmcb->control.exit_code != SVM_EXIT_NPF) {
		/*
		 * TODO: track the cause of the nested page fault, and
		 * correctly fill in the high bits of exit_info_1.
		 */
		svm->vmcb->control.exit_code = SVM_EXIT_NPF;
		svm->vmcb->control.exit_code_hi = 0;
		svm->vmcb->control.exit_info_1 = (1ULL << 32);
		svm->vmcb->control.exit_info_2 = fault->address;
	}

	svm->vmcb->control.exit_info_1 &= ~0xffffffffULL;
	svm->vmcb->control.exit_info_1 |= fault->error_code;

	/*
	 * The present bit is always zero for page structure faults on real
	 * hardware.
	 */
	if (svm->vmcb->control.exit_info_1 & (2ULL << 32))
		svm->vmcb->control.exit_info_1 &= ~1;
2971 2972 2973 2974

	nested_svm_vmexit(svm);
}

2975
static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu)
2976
{
2977
	WARN_ON(mmu_is_nested(vcpu));
2978 2979

	vcpu->arch.mmu = &vcpu->arch.guest_mmu;
2980
	kvm_init_shadow_mmu(vcpu);
2981 2982 2983 2984 2985 2986
	vcpu->arch.mmu->set_cr3           = nested_svm_set_tdp_cr3;
	vcpu->arch.mmu->get_cr3           = nested_svm_get_tdp_cr3;
	vcpu->arch.mmu->get_pdptr         = nested_svm_get_tdp_pdptr;
	vcpu->arch.mmu->inject_page_fault = nested_svm_inject_npf_exit;
	vcpu->arch.mmu->shadow_root_level = get_npt_level(vcpu);
	reset_shadow_zero_bits_mask(vcpu, vcpu->arch.mmu);
2987 2988 2989 2990 2991
	vcpu->arch.walk_mmu              = &vcpu->arch.nested_mmu;
}

static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu)
{
2992
	vcpu->arch.mmu = &vcpu->arch.root_mmu;
2993
	vcpu->arch.walk_mmu = &vcpu->arch.root_mmu;
2994 2995
}

2996 2997
static int nested_svm_check_permissions(struct vcpu_svm *svm)
{
2998 2999
	if (!(svm->vcpu.arch.efer & EFER_SVME) ||
	    !is_paging(&svm->vcpu)) {
3000 3001 3002 3003 3004 3005 3006 3007 3008
		kvm_queue_exception(&svm->vcpu, UD_VECTOR);
		return 1;
	}

	if (svm->vmcb->save.cpl) {
		kvm_inject_gp(&svm->vcpu, 0);
		return 1;
	}

3009
	return 0;
3010 3011
}

3012 3013 3014
static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
				      bool has_error_code, u32 error_code)
{
3015 3016
	int vmexit;

3017
	if (!is_guest_mode(&svm->vcpu))
3018
		return 0;
3019

3020 3021 3022 3023
	vmexit = nested_svm_intercept(svm);
	if (vmexit != NESTED_EXIT_DONE)
		return 0;

3024 3025 3026
	svm->vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + nr;
	svm->vmcb->control.exit_code_hi = 0;
	svm->vmcb->control.exit_info_1 = error_code;
3027 3028

	/*
3029 3030
	 * EXITINFO2 is undefined for all exception intercepts other
	 * than #PF.
3031
	 */
3032 3033
	if (svm->vcpu.arch.exception.nested_apf)
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.apf.nested_apf_token;
3034 3035
	else if (svm->vcpu.arch.exception.has_payload)
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.exception.payload;
3036 3037
	else
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2;
3038

3039
	svm->nested.exit_required = true;
3040
	return vmexit;
3041 3042
}

3043 3044
/* This function returns true if it is save to enable the irq window */
static inline bool nested_svm_intr(struct vcpu_svm *svm)
3045
{
3046
	if (!is_guest_mode(&svm->vcpu))
3047
		return true;
3048

3049
	if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
3050
		return true;
3051

3052
	if (!(svm->vcpu.arch.hflags & HF_HIF_MASK))
3053
		return false;
3054

3055 3056 3057 3058 3059 3060 3061 3062
	/*
	 * if vmexit was already requested (by intercepted exception
	 * for instance) do not overwrite it with "external interrupt"
	 * vmexit.
	 */
	if (svm->nested.exit_required)
		return false;

3063 3064 3065
	svm->vmcb->control.exit_code   = SVM_EXIT_INTR;
	svm->vmcb->control.exit_info_1 = 0;
	svm->vmcb->control.exit_info_2 = 0;
3066

3067 3068 3069
	if (svm->nested.intercept & 1ULL) {
		/*
		 * The #vmexit can't be emulated here directly because this
G
Guo Chao 已提交
3070
		 * code path runs with irqs and preemption disabled. A
3071 3072 3073 3074
		 * #vmexit emulation might sleep. Only signal request for
		 * the #vmexit here.
		 */
		svm->nested.exit_required = true;
3075
		trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip);
3076
		return false;
3077 3078
	}

3079
	return true;
3080 3081
}

3082 3083 3084
/* This function returns true if it is save to enable the nmi window */
static inline bool nested_svm_nmi(struct vcpu_svm *svm)
{
3085
	if (!is_guest_mode(&svm->vcpu))
3086 3087 3088 3089 3090 3091 3092 3093 3094
		return true;

	if (!(svm->nested.intercept & (1ULL << INTERCEPT_NMI)))
		return true;

	svm->vmcb->control.exit_code = SVM_EXIT_NMI;
	svm->nested.exit_required = true;

	return false;
3095 3096
}

3097 3098
static int nested_svm_intercept_ioio(struct vcpu_svm *svm)
{
3099 3100 3101
	unsigned port, size, iopm_len;
	u16 val, mask;
	u8 start_bit;
3102
	u64 gpa;
3103

3104 3105
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_IOIO_PROT)))
		return NESTED_EXIT_HOST;
3106

3107
	port = svm->vmcb->control.exit_info_1 >> 16;
3108 3109
	size = (svm->vmcb->control.exit_info_1 & SVM_IOIO_SIZE_MASK) >>
		SVM_IOIO_SIZE_SHIFT;
3110
	gpa  = svm->nested.vmcb_iopm + (port / 8);
3111 3112 3113 3114
	start_bit = port % 8;
	iopm_len = (start_bit + size > 8) ? 2 : 1;
	mask = (0xf >> (4 - size)) << start_bit;
	val = 0;
3115

3116
	if (kvm_vcpu_read_guest(&svm->vcpu, gpa, &val, iopm_len))
3117
		return NESTED_EXIT_DONE;
3118

3119
	return (val & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
3120 3121
}

3122
static int nested_svm_exit_handled_msr(struct vcpu_svm *svm)
3123
{
3124 3125
	u32 offset, msr, value;
	int write, mask;
3126

3127
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
3128
		return NESTED_EXIT_HOST;
3129

3130 3131 3132 3133
	msr    = svm->vcpu.arch.regs[VCPU_REGS_RCX];
	offset = svm_msrpm_offset(msr);
	write  = svm->vmcb->control.exit_info_1 & 1;
	mask   = 1 << ((2 * (msr & 0xf)) + write);
3134

3135 3136
	if (offset == MSR_INVALID)
		return NESTED_EXIT_DONE;
3137

3138 3139
	/* Offset is in 32 bit units but need in 8 bit units */
	offset *= 4;
3140

3141
	if (kvm_vcpu_read_guest(&svm->vcpu, svm->nested.vmcb_msrpm + offset, &value, 4))
3142
		return NESTED_EXIT_DONE;
3143

3144
	return (value & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
3145 3146
}

3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171
/* DB exceptions for our internal use must not cause vmexit */
static int nested_svm_intercept_db(struct vcpu_svm *svm)
{
	unsigned long dr6;

	/* if we're not singlestepping, it's not ours */
	if (!svm->nmi_singlestep)
		return NESTED_EXIT_DONE;

	/* if it's not a singlestep exception, it's not ours */
	if (kvm_get_dr(&svm->vcpu, 6, &dr6))
		return NESTED_EXIT_DONE;
	if (!(dr6 & DR6_BS))
		return NESTED_EXIT_DONE;

	/* if the guest is singlestepping, it should get the vmexit */
	if (svm->nmi_singlestep_guest_rflags & X86_EFLAGS_TF) {
		disable_nmi_singlestep(svm);
		return NESTED_EXIT_DONE;
	}

	/* it's ours, the nested hypervisor must not see this one */
	return NESTED_EXIT_HOST;
}

3172
static int nested_svm_exit_special(struct vcpu_svm *svm)
3173 3174
{
	u32 exit_code = svm->vmcb->control.exit_code;
3175

3176 3177 3178
	switch (exit_code) {
	case SVM_EXIT_INTR:
	case SVM_EXIT_NMI:
3179
	case SVM_EXIT_EXCP_BASE + MC_VECTOR:
3180 3181
		return NESTED_EXIT_HOST;
	case SVM_EXIT_NPF:
J
Joerg Roedel 已提交
3182
		/* For now we are always handling NPFs when using them */
3183 3184 3185 3186
		if (npt_enabled)
			return NESTED_EXIT_HOST;
		break;
	case SVM_EXIT_EXCP_BASE + PF_VECTOR:
G
Gleb Natapov 已提交
3187
		/* When we're shadowing, trap PFs, but not async PF */
3188
		if (!npt_enabled && svm->vcpu.arch.apf.host_apf_reason == 0)
3189 3190 3191 3192
			return NESTED_EXIT_HOST;
		break;
	default:
		break;
3193 3194
	}

3195 3196 3197 3198 3199 3200
	return NESTED_EXIT_CONTINUE;
}

/*
 * If this function returns true, this #vmexit was already handled
 */
3201
static int nested_svm_intercept(struct vcpu_svm *svm)
3202 3203 3204 3205
{
	u32 exit_code = svm->vmcb->control.exit_code;
	int vmexit = NESTED_EXIT_HOST;

3206
	switch (exit_code) {
3207
	case SVM_EXIT_MSR:
3208
		vmexit = nested_svm_exit_handled_msr(svm);
3209
		break;
3210 3211 3212
	case SVM_EXIT_IOIO:
		vmexit = nested_svm_intercept_ioio(svm);
		break;
3213 3214 3215
	case SVM_EXIT_READ_CR0 ... SVM_EXIT_WRITE_CR8: {
		u32 bit = 1U << (exit_code - SVM_EXIT_READ_CR0);
		if (svm->nested.intercept_cr & bit)
3216
			vmexit = NESTED_EXIT_DONE;
3217 3218
		break;
	}
3219 3220 3221
	case SVM_EXIT_READ_DR0 ... SVM_EXIT_WRITE_DR7: {
		u32 bit = 1U << (exit_code - SVM_EXIT_READ_DR0);
		if (svm->nested.intercept_dr & bit)
3222
			vmexit = NESTED_EXIT_DONE;
3223 3224 3225 3226
		break;
	}
	case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: {
		u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE);
3227 3228 3229 3230 3231 3232
		if (svm->nested.intercept_exceptions & excp_bits) {
			if (exit_code == SVM_EXIT_EXCP_BASE + DB_VECTOR)
				vmexit = nested_svm_intercept_db(svm);
			else
				vmexit = NESTED_EXIT_DONE;
		}
G
Gleb Natapov 已提交
3233 3234
		/* async page fault always cause vmexit */
		else if ((exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) &&
3235
			 svm->vcpu.arch.exception.nested_apf != 0)
G
Gleb Natapov 已提交
3236
			vmexit = NESTED_EXIT_DONE;
3237 3238
		break;
	}
3239 3240 3241 3242
	case SVM_EXIT_ERR: {
		vmexit = NESTED_EXIT_DONE;
		break;
	}
3243 3244
	default: {
		u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR);
J
Joerg Roedel 已提交
3245
		if (svm->nested.intercept & exit_bits)
3246
			vmexit = NESTED_EXIT_DONE;
3247 3248 3249
	}
	}

3250 3251 3252 3253 3254 3255 3256 3257 3258 3259
	return vmexit;
}

static int nested_svm_exit_handled(struct vcpu_svm *svm)
{
	int vmexit;

	vmexit = nested_svm_intercept(svm);

	if (vmexit == NESTED_EXIT_DONE)
3260 3261 3262
		nested_svm_vmexit(svm);

	return vmexit;
3263 3264
}

3265 3266 3267 3268 3269
static inline void copy_vmcb_control_area(struct vmcb *dst_vmcb, struct vmcb *from_vmcb)
{
	struct vmcb_control_area *dst  = &dst_vmcb->control;
	struct vmcb_control_area *from = &from_vmcb->control;

3270
	dst->intercept_cr         = from->intercept_cr;
3271
	dst->intercept_dr         = from->intercept_dr;
3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291
	dst->intercept_exceptions = from->intercept_exceptions;
	dst->intercept            = from->intercept;
	dst->iopm_base_pa         = from->iopm_base_pa;
	dst->msrpm_base_pa        = from->msrpm_base_pa;
	dst->tsc_offset           = from->tsc_offset;
	dst->asid                 = from->asid;
	dst->tlb_ctl              = from->tlb_ctl;
	dst->int_ctl              = from->int_ctl;
	dst->int_vector           = from->int_vector;
	dst->int_state            = from->int_state;
	dst->exit_code            = from->exit_code;
	dst->exit_code_hi         = from->exit_code_hi;
	dst->exit_info_1          = from->exit_info_1;
	dst->exit_info_2          = from->exit_info_2;
	dst->exit_int_info        = from->exit_int_info;
	dst->exit_int_info_err    = from->exit_int_info_err;
	dst->nested_ctl           = from->nested_ctl;
	dst->event_inj            = from->event_inj;
	dst->event_inj_err        = from->event_inj_err;
	dst->nested_cr3           = from->nested_cr3;
3292
	dst->virt_ext              = from->virt_ext;
3293 3294
	dst->pause_filter_count   = from->pause_filter_count;
	dst->pause_filter_thresh  = from->pause_filter_thresh;
3295 3296
}

3297
static int nested_svm_vmexit(struct vcpu_svm *svm)
3298
{
3299
	int rc;
3300
	struct vmcb *nested_vmcb;
3301
	struct vmcb *hsave = svm->nested.hsave;
J
Joerg Roedel 已提交
3302
	struct vmcb *vmcb = svm->vmcb;
3303
	struct kvm_host_map map;
3304

3305 3306 3307 3308
	trace_kvm_nested_vmexit_inject(vmcb->control.exit_code,
				       vmcb->control.exit_info_1,
				       vmcb->control.exit_info_2,
				       vmcb->control.exit_int_info,
3309 3310
				       vmcb->control.exit_int_info_err,
				       KVM_ISA_SVM);
3311

3312
	rc = kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(svm->nested.vmcb), &map);
3313 3314 3315
	if (rc) {
		if (rc == -EINVAL)
			kvm_inject_gp(&svm->vcpu, 0);
3316
		return 1;
3317 3318 3319
	}

	nested_vmcb = map.hva;
3320

3321 3322
	/* Exit Guest-Mode */
	leave_guest_mode(&svm->vcpu);
3323 3324
	svm->nested.vmcb = 0;

3325
	/* Give the current vmcb to the guest */
J
Joerg Roedel 已提交
3326 3327 3328 3329 3330 3331 3332 3333
	disable_gif(svm);

	nested_vmcb->save.es     = vmcb->save.es;
	nested_vmcb->save.cs     = vmcb->save.cs;
	nested_vmcb->save.ss     = vmcb->save.ss;
	nested_vmcb->save.ds     = vmcb->save.ds;
	nested_vmcb->save.gdtr   = vmcb->save.gdtr;
	nested_vmcb->save.idtr   = vmcb->save.idtr;
3334
	nested_vmcb->save.efer   = svm->vcpu.arch.efer;
3335
	nested_vmcb->save.cr0    = kvm_read_cr0(&svm->vcpu);
3336
	nested_vmcb->save.cr3    = kvm_read_cr3(&svm->vcpu);
J
Joerg Roedel 已提交
3337
	nested_vmcb->save.cr2    = vmcb->save.cr2;
3338
	nested_vmcb->save.cr4    = svm->vcpu.arch.cr4;
3339
	nested_vmcb->save.rflags = kvm_get_rflags(&svm->vcpu);
J
Joerg Roedel 已提交
3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355
	nested_vmcb->save.rip    = vmcb->save.rip;
	nested_vmcb->save.rsp    = vmcb->save.rsp;
	nested_vmcb->save.rax    = vmcb->save.rax;
	nested_vmcb->save.dr7    = vmcb->save.dr7;
	nested_vmcb->save.dr6    = vmcb->save.dr6;
	nested_vmcb->save.cpl    = vmcb->save.cpl;

	nested_vmcb->control.int_ctl           = vmcb->control.int_ctl;
	nested_vmcb->control.int_vector        = vmcb->control.int_vector;
	nested_vmcb->control.int_state         = vmcb->control.int_state;
	nested_vmcb->control.exit_code         = vmcb->control.exit_code;
	nested_vmcb->control.exit_code_hi      = vmcb->control.exit_code_hi;
	nested_vmcb->control.exit_info_1       = vmcb->control.exit_info_1;
	nested_vmcb->control.exit_info_2       = vmcb->control.exit_info_2;
	nested_vmcb->control.exit_int_info     = vmcb->control.exit_int_info;
	nested_vmcb->control.exit_int_info_err = vmcb->control.exit_int_info_err;
3356 3357 3358

	if (svm->nrips_enabled)
		nested_vmcb->control.next_rip  = vmcb->control.next_rip;
3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374

	/*
	 * If we emulate a VMRUN/#VMEXIT in the same host #vmexit cycle we have
	 * to make sure that we do not lose injected events. So check event_inj
	 * here and copy it to exit_int_info if it is valid.
	 * Exit_int_info and event_inj can't be both valid because the case
	 * below only happens on a VMRUN instruction intercept which has
	 * no valid exit_int_info set.
	 */
	if (vmcb->control.event_inj & SVM_EVTINJ_VALID) {
		struct vmcb_control_area *nc = &nested_vmcb->control;

		nc->exit_int_info     = vmcb->control.event_inj;
		nc->exit_int_info_err = vmcb->control.event_inj_err;
	}

J
Joerg Roedel 已提交
3375 3376 3377
	nested_vmcb->control.tlb_ctl           = 0;
	nested_vmcb->control.event_inj         = 0;
	nested_vmcb->control.event_inj_err     = 0;
3378

3379 3380 3381 3382 3383
	nested_vmcb->control.pause_filter_count =
		svm->vmcb->control.pause_filter_count;
	nested_vmcb->control.pause_filter_thresh =
		svm->vmcb->control.pause_filter_thresh;

3384 3385 3386 3387 3388
	/* We always set V_INTR_MASKING and remember the old value in hflags */
	if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
		nested_vmcb->control.int_ctl &= ~V_INTR_MASKING_MASK;

	/* Restore the original control entries */
3389
	copy_vmcb_control_area(vmcb, hsave);
3390

3391
	svm->vcpu.arch.tsc_offset = svm->vmcb->control.tsc_offset;
3392 3393
	kvm_clear_exception_queue(&svm->vcpu);
	kvm_clear_interrupt_queue(&svm->vcpu);
3394

3395 3396
	svm->nested.nested_cr3 = 0;

3397 3398 3399 3400 3401 3402 3403
	/* Restore selected save entries */
	svm->vmcb->save.es = hsave->save.es;
	svm->vmcb->save.cs = hsave->save.cs;
	svm->vmcb->save.ss = hsave->save.ss;
	svm->vmcb->save.ds = hsave->save.ds;
	svm->vmcb->save.gdtr = hsave->save.gdtr;
	svm->vmcb->save.idtr = hsave->save.idtr;
3404
	kvm_set_rflags(&svm->vcpu, hsave->save.rflags);
3405 3406 3407 3408 3409 3410 3411
	svm_set_efer(&svm->vcpu, hsave->save.efer);
	svm_set_cr0(&svm->vcpu, hsave->save.cr0 | X86_CR0_PE);
	svm_set_cr4(&svm->vcpu, hsave->save.cr4);
	if (npt_enabled) {
		svm->vmcb->save.cr3 = hsave->save.cr3;
		svm->vcpu.arch.cr3 = hsave->save.cr3;
	} else {
3412
		(void)kvm_set_cr3(&svm->vcpu, hsave->save.cr3);
3413
	}
3414
	kvm_rax_write(&svm->vcpu, hsave->save.rax);
3415 3416
	kvm_rsp_write(&svm->vcpu, hsave->save.rsp);
	kvm_rip_write(&svm->vcpu, hsave->save.rip);
3417 3418 3419 3420
	svm->vmcb->save.dr7 = 0;
	svm->vmcb->save.cpl = 0;
	svm->vmcb->control.exit_int_info = 0;

3421 3422
	mark_all_dirty(svm->vmcb);

3423
	kvm_vcpu_unmap(&svm->vcpu, &map, true);
3424

3425
	nested_svm_uninit_mmu_context(&svm->vcpu);
3426 3427 3428
	kvm_mmu_reset_context(&svm->vcpu);
	kvm_mmu_load(&svm->vcpu);

3429 3430 3431 3432 3433 3434 3435 3436
	/*
	 * Drop what we picked up for L2 via svm_complete_interrupts() so it
	 * doesn't end up in L1.
	 */
	svm->vcpu.arch.nmi_injected = false;
	kvm_clear_exception_queue(&svm->vcpu);
	kvm_clear_interrupt_queue(&svm->vcpu);

3437 3438
	return 0;
}
A
Alexander Graf 已提交
3439

3440
static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3441
{
3442 3443
	/*
	 * This function merges the msr permission bitmaps of kvm and the
G
Guo Chao 已提交
3444
	 * nested vmcb. It is optimized in that it only merges the parts where
3445 3446
	 * the kvm msr permission bitmap may contain zero bits
	 */
A
Alexander Graf 已提交
3447
	int i;
3448

3449 3450
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
		return true;
3451

3452 3453 3454
	for (i = 0; i < MSRPM_OFFSETS; i++) {
		u32 value, p;
		u64 offset;
3455

3456 3457
		if (msrpm_offsets[i] == 0xffffffff)
			break;
A
Alexander Graf 已提交
3458

3459 3460
		p      = msrpm_offsets[i];
		offset = svm->nested.vmcb_msrpm + (p * 4);
3461

3462
		if (kvm_vcpu_read_guest(&svm->vcpu, offset, &value, 4))
3463 3464 3465 3466
			return false;

		svm->nested.msrpm[p] = svm->msrpm[p] | value;
	}
A
Alexander Graf 已提交
3467

3468
	svm->vmcb->control.msrpm_base_pa = __sme_set(__pa(svm->nested.msrpm));
3469 3470

	return true;
A
Alexander Graf 已提交
3471 3472
}

3473 3474 3475 3476 3477
static bool nested_vmcb_checks(struct vmcb *vmcb)
{
	if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0)
		return false;

3478 3479 3480
	if (vmcb->control.asid == 0)
		return false;

3481 3482
	if ((vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) &&
	    !npt_enabled)
3483 3484
		return false;

3485 3486 3487
	return true;
}

L
Ladi Prosek 已提交
3488
static void enter_svm_guest_mode(struct vcpu_svm *svm, u64 vmcb_gpa,
3489
				 struct vmcb *nested_vmcb, struct kvm_host_map *map)
A
Alexander Graf 已提交
3490
{
3491
	if (kvm_get_rflags(&svm->vcpu) & X86_EFLAGS_IF)
A
Alexander Graf 已提交
3492 3493 3494 3495
		svm->vcpu.arch.hflags |= HF_HIF_MASK;
	else
		svm->vcpu.arch.hflags &= ~HF_HIF_MASK;

3496
	if (nested_vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) {
3497 3498 3499 3500
		svm->nested.nested_cr3 = nested_vmcb->control.nested_cr3;
		nested_svm_init_mmu_context(&svm->vcpu);
	}

A
Alexander Graf 已提交
3501 3502 3503 3504 3505 3506 3507
	/* Load the nested guest state */
	svm->vmcb->save.es = nested_vmcb->save.es;
	svm->vmcb->save.cs = nested_vmcb->save.cs;
	svm->vmcb->save.ss = nested_vmcb->save.ss;
	svm->vmcb->save.ds = nested_vmcb->save.ds;
	svm->vmcb->save.gdtr = nested_vmcb->save.gdtr;
	svm->vmcb->save.idtr = nested_vmcb->save.idtr;
3508
	kvm_set_rflags(&svm->vcpu, nested_vmcb->save.rflags);
A
Alexander Graf 已提交
3509 3510 3511 3512 3513 3514
	svm_set_efer(&svm->vcpu, nested_vmcb->save.efer);
	svm_set_cr0(&svm->vcpu, nested_vmcb->save.cr0);
	svm_set_cr4(&svm->vcpu, nested_vmcb->save.cr4);
	if (npt_enabled) {
		svm->vmcb->save.cr3 = nested_vmcb->save.cr3;
		svm->vcpu.arch.cr3 = nested_vmcb->save.cr3;
3515
	} else
3516
		(void)kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3);
3517 3518 3519 3520

	/* Guest paging mode is active - reset mmu */
	kvm_mmu_reset_context(&svm->vcpu);

J
Joerg Roedel 已提交
3521
	svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2;
3522
	kvm_rax_write(&svm->vcpu, nested_vmcb->save.rax);
3523 3524
	kvm_rsp_write(&svm->vcpu, nested_vmcb->save.rsp);
	kvm_rip_write(&svm->vcpu, nested_vmcb->save.rip);
J
Joerg Roedel 已提交
3525

A
Alexander Graf 已提交
3526 3527 3528 3529 3530 3531 3532 3533
	/* In case we don't even reach vcpu_run, the fields are not updated */
	svm->vmcb->save.rax = nested_vmcb->save.rax;
	svm->vmcb->save.rsp = nested_vmcb->save.rsp;
	svm->vmcb->save.rip = nested_vmcb->save.rip;
	svm->vmcb->save.dr7 = nested_vmcb->save.dr7;
	svm->vmcb->save.dr6 = nested_vmcb->save.dr6;
	svm->vmcb->save.cpl = nested_vmcb->save.cpl;

3534
	svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa & ~0x0fffULL;
3535
	svm->nested.vmcb_iopm  = nested_vmcb->control.iopm_base_pa  & ~0x0fffULL;
A
Alexander Graf 已提交
3536

J
Joerg Roedel 已提交
3537
	/* cache intercepts */
3538
	svm->nested.intercept_cr         = nested_vmcb->control.intercept_cr;
3539
	svm->nested.intercept_dr         = nested_vmcb->control.intercept_dr;
J
Joerg Roedel 已提交
3540 3541 3542
	svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions;
	svm->nested.intercept            = nested_vmcb->control.intercept;

3543
	svm_flush_tlb(&svm->vcpu, true);
A
Alexander Graf 已提交
3544 3545 3546 3547 3548 3549
	svm->vmcb->control.int_ctl = nested_vmcb->control.int_ctl | V_INTR_MASKING_MASK;
	if (nested_vmcb->control.int_ctl & V_INTR_MASKING_MASK)
		svm->vcpu.arch.hflags |= HF_VINTR_MASK;
	else
		svm->vcpu.arch.hflags &= ~HF_VINTR_MASK;

3550 3551
	if (svm->vcpu.arch.hflags & HF_VINTR_MASK) {
		/* We only want the cr8 intercept bits of the guest */
3552 3553
		clr_cr_intercept(svm, INTERCEPT_CR8_READ);
		clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
3554 3555
	}

3556
	/* We don't want to see VMMCALLs from a nested guest */
3557
	clr_intercept(svm, INTERCEPT_VMMCALL);
3558

3559 3560 3561
	svm->vcpu.arch.tsc_offset += nested_vmcb->control.tsc_offset;
	svm->vmcb->control.tsc_offset = svm->vcpu.arch.tsc_offset;

3562
	svm->vmcb->control.virt_ext = nested_vmcb->control.virt_ext;
A
Alexander Graf 已提交
3563 3564 3565 3566 3567
	svm->vmcb->control.int_vector = nested_vmcb->control.int_vector;
	svm->vmcb->control.int_state = nested_vmcb->control.int_state;
	svm->vmcb->control.event_inj = nested_vmcb->control.event_inj;
	svm->vmcb->control.event_inj_err = nested_vmcb->control.event_inj_err;

3568 3569 3570 3571 3572
	svm->vmcb->control.pause_filter_count =
		nested_vmcb->control.pause_filter_count;
	svm->vmcb->control.pause_filter_thresh =
		nested_vmcb->control.pause_filter_thresh;

3573
	kvm_vcpu_unmap(&svm->vcpu, map, true);
3574

3575 3576 3577
	/* Enter Guest-Mode */
	enter_guest_mode(&svm->vcpu);

3578 3579 3580 3581 3582 3583
	/*
	 * Merge guest and host intercepts - must be called  with vcpu in
	 * guest-mode to take affect here
	 */
	recalc_intercepts(svm);

3584
	svm->nested.vmcb = vmcb_gpa;
3585

3586
	enable_gif(svm);
A
Alexander Graf 已提交
3587

3588
	mark_all_dirty(svm->vmcb);
L
Ladi Prosek 已提交
3589 3590
}

3591
static int nested_svm_vmrun(struct vcpu_svm *svm)
L
Ladi Prosek 已提交
3592
{
3593
	int ret;
L
Ladi Prosek 已提交
3594 3595 3596
	struct vmcb *nested_vmcb;
	struct vmcb *hsave = svm->nested.hsave;
	struct vmcb *vmcb = svm->vmcb;
3597
	struct kvm_host_map map;
L
Ladi Prosek 已提交
3598 3599 3600 3601
	u64 vmcb_gpa;

	vmcb_gpa = svm->vmcb->save.rax;

3602
	ret = kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(vmcb_gpa), &map);
3603
	if (ret == -EINVAL) {
3604
		kvm_inject_gp(&svm->vcpu, 0);
3605
		return 1;
3606 3607
	} else if (ret) {
		return kvm_skip_emulated_instruction(&svm->vcpu);
3608 3609
	}

3610 3611
	ret = kvm_skip_emulated_instruction(&svm->vcpu);

3612
	nested_vmcb = map.hva;
L
Ladi Prosek 已提交
3613 3614 3615 3616 3617 3618 3619

	if (!nested_vmcb_checks(nested_vmcb)) {
		nested_vmcb->control.exit_code    = SVM_EXIT_ERR;
		nested_vmcb->control.exit_code_hi = 0;
		nested_vmcb->control.exit_info_1  = 0;
		nested_vmcb->control.exit_info_2  = 0;

3620
		kvm_vcpu_unmap(&svm->vcpu, &map, true);
L
Ladi Prosek 已提交
3621

3622
		return ret;
L
Ladi Prosek 已提交
3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663
	}

	trace_kvm_nested_vmrun(svm->vmcb->save.rip, vmcb_gpa,
			       nested_vmcb->save.rip,
			       nested_vmcb->control.int_ctl,
			       nested_vmcb->control.event_inj,
			       nested_vmcb->control.nested_ctl);

	trace_kvm_nested_intercepts(nested_vmcb->control.intercept_cr & 0xffff,
				    nested_vmcb->control.intercept_cr >> 16,
				    nested_vmcb->control.intercept_exceptions,
				    nested_vmcb->control.intercept);

	/* Clear internal status */
	kvm_clear_exception_queue(&svm->vcpu);
	kvm_clear_interrupt_queue(&svm->vcpu);

	/*
	 * Save the old vmcb, so we don't need to pick what we save, but can
	 * restore everything when a VMEXIT occurs
	 */
	hsave->save.es     = vmcb->save.es;
	hsave->save.cs     = vmcb->save.cs;
	hsave->save.ss     = vmcb->save.ss;
	hsave->save.ds     = vmcb->save.ds;
	hsave->save.gdtr   = vmcb->save.gdtr;
	hsave->save.idtr   = vmcb->save.idtr;
	hsave->save.efer   = svm->vcpu.arch.efer;
	hsave->save.cr0    = kvm_read_cr0(&svm->vcpu);
	hsave->save.cr4    = svm->vcpu.arch.cr4;
	hsave->save.rflags = kvm_get_rflags(&svm->vcpu);
	hsave->save.rip    = kvm_rip_read(&svm->vcpu);
	hsave->save.rsp    = vmcb->save.rsp;
	hsave->save.rax    = vmcb->save.rax;
	if (npt_enabled)
		hsave->save.cr3    = vmcb->save.cr3;
	else
		hsave->save.cr3    = kvm_read_cr3(&svm->vcpu);

	copy_vmcb_control_area(hsave, vmcb);

3664
	enter_svm_guest_mode(svm, vmcb_gpa, nested_vmcb, &map);
3665

3666 3667 3668 3669 3670 3671 3672 3673 3674
	if (!nested_svm_vmrun_msrpm(svm)) {
		svm->vmcb->control.exit_code    = SVM_EXIT_ERR;
		svm->vmcb->control.exit_code_hi = 0;
		svm->vmcb->control.exit_info_1  = 0;
		svm->vmcb->control.exit_info_2  = 0;

		nested_svm_vmexit(svm);
	}

3675
	return ret;
A
Alexander Graf 已提交
3676 3677
}

3678
static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693
{
	to_vmcb->save.fs = from_vmcb->save.fs;
	to_vmcb->save.gs = from_vmcb->save.gs;
	to_vmcb->save.tr = from_vmcb->save.tr;
	to_vmcb->save.ldtr = from_vmcb->save.ldtr;
	to_vmcb->save.kernel_gs_base = from_vmcb->save.kernel_gs_base;
	to_vmcb->save.star = from_vmcb->save.star;
	to_vmcb->save.lstar = from_vmcb->save.lstar;
	to_vmcb->save.cstar = from_vmcb->save.cstar;
	to_vmcb->save.sfmask = from_vmcb->save.sfmask;
	to_vmcb->save.sysenter_cs = from_vmcb->save.sysenter_cs;
	to_vmcb->save.sysenter_esp = from_vmcb->save.sysenter_esp;
	to_vmcb->save.sysenter_eip = from_vmcb->save.sysenter_eip;
}

A
Avi Kivity 已提交
3694
static int vmload_interception(struct vcpu_svm *svm)
3695
{
3696
	struct vmcb *nested_vmcb;
3697
	struct kvm_host_map map;
3698
	int ret;
3699

3700 3701 3702
	if (nested_svm_check_permissions(svm))
		return 1;

3703 3704 3705 3706
	ret = kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(svm->vmcb->save.rax), &map);
	if (ret) {
		if (ret == -EINVAL)
			kvm_inject_gp(&svm->vcpu, 0);
3707
		return 1;
3708 3709 3710
	}

	nested_vmcb = map.hva;
3711

3712
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3713

3714
	nested_svm_vmloadsave(nested_vmcb, svm->vmcb);
3715
	kvm_vcpu_unmap(&svm->vcpu, &map, true);
3716

3717
	return ret;
3718 3719
}

A
Avi Kivity 已提交
3720
static int vmsave_interception(struct vcpu_svm *svm)
3721
{
3722
	struct vmcb *nested_vmcb;
3723
	struct kvm_host_map map;
3724
	int ret;
3725

3726 3727 3728
	if (nested_svm_check_permissions(svm))
		return 1;

3729 3730 3731 3732
	ret = kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(svm->vmcb->save.rax), &map);
	if (ret) {
		if (ret == -EINVAL)
			kvm_inject_gp(&svm->vcpu, 0);
3733
		return 1;
3734 3735 3736
	}

	nested_vmcb = map.hva;
3737

3738
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3739

3740
	nested_svm_vmloadsave(svm->vmcb, nested_vmcb);
3741
	kvm_vcpu_unmap(&svm->vcpu, &map, true);
3742

3743
	return ret;
3744 3745
}

A
Avi Kivity 已提交
3746
static int vmrun_interception(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3747 3748 3749 3750
{
	if (nested_svm_check_permissions(svm))
		return 1;

3751
	return nested_svm_vmrun(svm);
A
Alexander Graf 已提交
3752 3753
}

A
Avi Kivity 已提交
3754
static int stgi_interception(struct vcpu_svm *svm)
3755
{
3756 3757
	int ret;

3758 3759 3760
	if (nested_svm_check_permissions(svm))
		return 1;

3761 3762
	/*
	 * If VGIF is enabled, the STGI intercept is only added to
3763
	 * detect the opening of the SMI/NMI window; remove it now.
3764 3765 3766 3767
	 */
	if (vgif_enabled(svm))
		clr_intercept(svm, INTERCEPT_STGI);

3768
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3769
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3770

3771
	enable_gif(svm);
3772

3773
	return ret;
3774 3775
}

A
Avi Kivity 已提交
3776
static int clgi_interception(struct vcpu_svm *svm)
3777
{
3778 3779
	int ret;

3780 3781 3782
	if (nested_svm_check_permissions(svm))
		return 1;

3783
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3784

3785
	disable_gif(svm);
3786 3787

	/* After a CLGI no interrupts should come */
3788 3789 3790 3791 3792
	if (!kvm_vcpu_apicv_active(&svm->vcpu)) {
		svm_clear_vintr(svm);
		svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
		mark_dirty(svm->vmcb, VMCB_INTR);
	}
3793

3794
	return ret;
3795 3796
}

A
Avi Kivity 已提交
3797
static int invlpga_interception(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3798 3799 3800
{
	struct kvm_vcpu *vcpu = &svm->vcpu;

3801 3802
	trace_kvm_invlpga(svm->vmcb->save.rip, kvm_rcx_read(&svm->vcpu),
			  kvm_rax_read(&svm->vcpu));
3803

A
Alexander Graf 已提交
3804
	/* Let's treat INVLPGA the same as INVLPG (can be optimized!) */
3805
	kvm_mmu_invlpg(vcpu, kvm_rax_read(&svm->vcpu));
A
Alexander Graf 已提交
3806

3807
	return kvm_skip_emulated_instruction(&svm->vcpu);
A
Alexander Graf 已提交
3808 3809
}

3810 3811
static int skinit_interception(struct vcpu_svm *svm)
{
3812
	trace_kvm_skinit(svm->vmcb->save.rip, kvm_rax_read(&svm->vcpu));
3813 3814 3815 3816 3817

	kvm_queue_exception(&svm->vcpu, UD_VECTOR);
	return 1;
}

D
David Kaplan 已提交
3818 3819
static int wbinvd_interception(struct vcpu_svm *svm)
{
3820
	return kvm_emulate_wbinvd(&svm->vcpu);
D
David Kaplan 已提交
3821 3822
}

J
Joerg Roedel 已提交
3823 3824 3825
static int xsetbv_interception(struct vcpu_svm *svm)
{
	u64 new_bv = kvm_read_edx_eax(&svm->vcpu);
3826
	u32 index = kvm_rcx_read(&svm->vcpu);
J
Joerg Roedel 已提交
3827 3828

	if (kvm_set_xcr(&svm->vcpu, index, new_bv) == 0) {
3829
		return kvm_skip_emulated_instruction(&svm->vcpu);
J
Joerg Roedel 已提交
3830 3831 3832 3833 3834
	}

	return 1;
}

A
Avi Kivity 已提交
3835
static int task_switch_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3836
{
3837
	u16 tss_selector;
3838 3839 3840
	int reason;
	int int_type = svm->vmcb->control.exit_int_info &
		SVM_EXITINTINFO_TYPE_MASK;
3841
	int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK;
3842 3843 3844 3845
	uint32_t type =
		svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_TYPE_MASK;
	uint32_t idt_v =
		svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_VALID;
3846 3847
	bool has_error_code = false;
	u32 error_code = 0;
3848 3849

	tss_selector = (u16)svm->vmcb->control.exit_info_1;
3850

3851 3852
	if (svm->vmcb->control.exit_info_2 &
	    (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET))
3853 3854 3855 3856
		reason = TASK_SWITCH_IRET;
	else if (svm->vmcb->control.exit_info_2 &
		 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP))
		reason = TASK_SWITCH_JMP;
3857
	else if (idt_v)
3858 3859 3860 3861
		reason = TASK_SWITCH_GATE;
	else
		reason = TASK_SWITCH_CALL;

3862 3863 3864 3865 3866 3867
	if (reason == TASK_SWITCH_GATE) {
		switch (type) {
		case SVM_EXITINTINFO_TYPE_NMI:
			svm->vcpu.arch.nmi_injected = false;
			break;
		case SVM_EXITINTINFO_TYPE_EXEPT:
3868 3869 3870 3871 3872 3873
			if (svm->vmcb->control.exit_info_2 &
			    (1ULL << SVM_EXITINFOSHIFT_TS_HAS_ERROR_CODE)) {
				has_error_code = true;
				error_code =
					(u32)svm->vmcb->control.exit_info_2;
			}
3874 3875 3876 3877 3878 3879 3880 3881 3882
			kvm_clear_exception_queue(&svm->vcpu);
			break;
		case SVM_EXITINTINFO_TYPE_INTR:
			kvm_clear_interrupt_queue(&svm->vcpu);
			break;
		default:
			break;
		}
	}
3883

3884 3885 3886
	if (reason != TASK_SWITCH_GATE ||
	    int_type == SVM_EXITINTINFO_TYPE_SOFT ||
	    (int_type == SVM_EXITINTINFO_TYPE_EXEPT &&
3887
	     (int_vec == OF_VECTOR || int_vec == BP_VECTOR))) {
3888 3889
		if (skip_emulated_instruction(&svm->vcpu) == EMULATE_USER_EXIT)
			return 0;
3890
	}
3891

3892 3893 3894
	if (int_type != SVM_EXITINTINFO_TYPE_SOFT)
		int_vec = -1;

3895 3896


3897 3898
	return kvm_task_switch(&svm->vcpu, tss_selector, int_vec, reason,
			       has_error_code, error_code) != EMULATE_USER_EXIT;
A
Avi Kivity 已提交
3899 3900
}

A
Avi Kivity 已提交
3901
static int cpuid_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3902
{
3903
	return kvm_emulate_cpuid(&svm->vcpu);
A
Avi Kivity 已提交
3904 3905
}

A
Avi Kivity 已提交
3906
static int iret_interception(struct vcpu_svm *svm)
3907 3908
{
	++svm->vcpu.stat.nmi_window_exits;
3909
	clr_intercept(svm, INTERCEPT_IRET);
3910
	svm->vcpu.arch.hflags |= HF_IRET_MASK;
3911
	svm->nmi_iret_rip = kvm_rip_read(&svm->vcpu);
3912
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3913 3914 3915
	return 1;
}

A
Avi Kivity 已提交
3916
static int invlpg_interception(struct vcpu_svm *svm)
M
Marcelo Tosatti 已提交
3917
{
3918
	if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
3919
		return kvm_emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
3920 3921

	kvm_mmu_invlpg(&svm->vcpu, svm->vmcb->control.exit_info_1);
3922
	return kvm_skip_emulated_instruction(&svm->vcpu);
M
Marcelo Tosatti 已提交
3923 3924
}

A
Avi Kivity 已提交
3925
static int emulate_on_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3926
{
3927
	return kvm_emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
A
Avi Kivity 已提交
3928 3929
}

B
Brijesh Singh 已提交
3930 3931
static int rsm_interception(struct vcpu_svm *svm)
{
3932 3933
	return kvm_emulate_instruction_from_buffer(&svm->vcpu,
					rsm_ins_bytes, 2) == EMULATE_DONE;
B
Brijesh Singh 已提交
3934 3935
}

A
Avi Kivity 已提交
3936 3937 3938 3939
static int rdpmc_interception(struct vcpu_svm *svm)
{
	int err;

3940
	if (!nrips)
A
Avi Kivity 已提交
3941 3942 3943
		return emulate_on_interception(svm);

	err = kvm_rdpmc(&svm->vcpu);
3944
	return kvm_complete_insn_gp(&svm->vcpu, err);
A
Avi Kivity 已提交
3945 3946
}

3947 3948
static bool check_selective_cr0_intercepted(struct vcpu_svm *svm,
					    unsigned long val)
3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970
{
	unsigned long cr0 = svm->vcpu.arch.cr0;
	bool ret = false;
	u64 intercept;

	intercept = svm->nested.intercept;

	if (!is_guest_mode(&svm->vcpu) ||
	    (!(intercept & (1ULL << INTERCEPT_SELECTIVE_CR0))))
		return false;

	cr0 &= ~SVM_CR0_SELECTIVE_MASK;
	val &= ~SVM_CR0_SELECTIVE_MASK;

	if (cr0 ^ val) {
		svm->vmcb->control.exit_code = SVM_EXIT_CR0_SEL_WRITE;
		ret = (nested_svm_exit_handled(svm) == NESTED_EXIT_DONE);
	}

	return ret;
}

3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985
#define CR_VALID (1ULL << 63)

static int cr_interception(struct vcpu_svm *svm)
{
	int reg, cr;
	unsigned long val;
	int err;

	if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
		return emulate_on_interception(svm);

	if (unlikely((svm->vmcb->control.exit_info_1 & CR_VALID) == 0))
		return emulate_on_interception(svm);

	reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK;
3986 3987 3988 3989
	if (svm->vmcb->control.exit_code == SVM_EXIT_CR0_SEL_WRITE)
		cr = SVM_EXIT_WRITE_CR0 - SVM_EXIT_READ_CR0;
	else
		cr = svm->vmcb->control.exit_code - SVM_EXIT_READ_CR0;
3990 3991 3992 3993 3994 3995 3996

	err = 0;
	if (cr >= 16) { /* mov to cr */
		cr -= 16;
		val = kvm_register_read(&svm->vcpu, reg);
		switch (cr) {
		case 0:
3997 3998
			if (!check_selective_cr0_intercepted(svm, val))
				err = kvm_set_cr0(&svm->vcpu, val);
3999 4000 4001
			else
				return 1;

4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025
			break;
		case 3:
			err = kvm_set_cr3(&svm->vcpu, val);
			break;
		case 4:
			err = kvm_set_cr4(&svm->vcpu, val);
			break;
		case 8:
			err = kvm_set_cr8(&svm->vcpu, val);
			break;
		default:
			WARN(1, "unhandled write to CR%d", cr);
			kvm_queue_exception(&svm->vcpu, UD_VECTOR);
			return 1;
		}
	} else { /* mov from cr */
		switch (cr) {
		case 0:
			val = kvm_read_cr0(&svm->vcpu);
			break;
		case 2:
			val = svm->vcpu.arch.cr2;
			break;
		case 3:
4026
			val = kvm_read_cr3(&svm->vcpu);
4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040
			break;
		case 4:
			val = kvm_read_cr4(&svm->vcpu);
			break;
		case 8:
			val = kvm_get_cr8(&svm->vcpu);
			break;
		default:
			WARN(1, "unhandled read from CR%d", cr);
			kvm_queue_exception(&svm->vcpu, UD_VECTOR);
			return 1;
		}
		kvm_register_write(&svm->vcpu, reg, val);
	}
4041
	return kvm_complete_insn_gp(&svm->vcpu, err);
4042 4043
}

4044 4045 4046 4047 4048
static int dr_interception(struct vcpu_svm *svm)
{
	int reg, dr;
	unsigned long val;

4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059
	if (svm->vcpu.guest_debug == 0) {
		/*
		 * No more DR vmexits; force a reload of the debug registers
		 * and reenter on this instruction.  The next vmexit will
		 * retrieve the full state of the debug registers.
		 */
		clr_dr_intercepts(svm);
		svm->vcpu.arch.switch_db_regs |= KVM_DEBUGREG_WONT_EXIT;
		return 1;
	}

4060 4061 4062 4063 4064 4065 4066
	if (!boot_cpu_has(X86_FEATURE_DECODEASSISTS))
		return emulate_on_interception(svm);

	reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK;
	dr = svm->vmcb->control.exit_code - SVM_EXIT_READ_DR0;

	if (dr >= 16) { /* mov to DRn */
4067 4068
		if (!kvm_require_dr(&svm->vcpu, dr - 16))
			return 1;
4069 4070 4071
		val = kvm_register_read(&svm->vcpu, reg);
		kvm_set_dr(&svm->vcpu, dr - 16, val);
	} else {
4072 4073 4074 4075
		if (!kvm_require_dr(&svm->vcpu, dr))
			return 1;
		kvm_get_dr(&svm->vcpu, dr, &val);
		kvm_register_write(&svm->vcpu, reg, val);
4076 4077
	}

4078
	return kvm_skip_emulated_instruction(&svm->vcpu);
4079 4080
}

A
Avi Kivity 已提交
4081
static int cr8_write_interception(struct vcpu_svm *svm)
4082
{
A
Avi Kivity 已提交
4083
	struct kvm_run *kvm_run = svm->vcpu.run;
A
Andre Przywara 已提交
4084
	int r;
A
Avi Kivity 已提交
4085

4086 4087
	u8 cr8_prev = kvm_get_cr8(&svm->vcpu);
	/* instruction emulation calls kvm_set_cr8() */
4088
	r = cr_interception(svm);
4089
	if (lapic_in_kernel(&svm->vcpu))
4090
		return r;
4091
	if (cr8_prev <= kvm_get_cr8(&svm->vcpu))
4092
		return r;
4093 4094 4095 4096
	kvm_run->exit_reason = KVM_EXIT_SET_TPR;
	return 0;
}

4097 4098
static int svm_get_msr_feature(struct kvm_msr_entry *msr)
{
4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110
	msr->data = 0;

	switch (msr->index) {
	case MSR_F10H_DECFG:
		if (boot_cpu_has(X86_FEATURE_LFENCE_RDTSC))
			msr->data |= MSR_F10H_DECFG_LFENCE_SERIALIZE;
		break;
	default:
		return 1;
	}

	return 0;
4111 4112
}

4113
static int svm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
A
Avi Kivity 已提交
4114
{
4115 4116
	struct vcpu_svm *svm = to_svm(vcpu);

4117
	switch (msr_info->index) {
B
Brian Gerst 已提交
4118
	case MSR_STAR:
4119
		msr_info->data = svm->vmcb->save.star;
A
Avi Kivity 已提交
4120
		break;
4121
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
4122
	case MSR_LSTAR:
4123
		msr_info->data = svm->vmcb->save.lstar;
A
Avi Kivity 已提交
4124 4125
		break;
	case MSR_CSTAR:
4126
		msr_info->data = svm->vmcb->save.cstar;
A
Avi Kivity 已提交
4127 4128
		break;
	case MSR_KERNEL_GS_BASE:
4129
		msr_info->data = svm->vmcb->save.kernel_gs_base;
A
Avi Kivity 已提交
4130 4131
		break;
	case MSR_SYSCALL_MASK:
4132
		msr_info->data = svm->vmcb->save.sfmask;
A
Avi Kivity 已提交
4133 4134 4135
		break;
#endif
	case MSR_IA32_SYSENTER_CS:
4136
		msr_info->data = svm->vmcb->save.sysenter_cs;
A
Avi Kivity 已提交
4137 4138
		break;
	case MSR_IA32_SYSENTER_EIP:
4139
		msr_info->data = svm->sysenter_eip;
A
Avi Kivity 已提交
4140 4141
		break;
	case MSR_IA32_SYSENTER_ESP:
4142
		msr_info->data = svm->sysenter_esp;
A
Avi Kivity 已提交
4143
		break;
P
Paolo Bonzini 已提交
4144 4145 4146 4147 4148
	case MSR_TSC_AUX:
		if (!boot_cpu_has(X86_FEATURE_RDTSCP))
			return 1;
		msr_info->data = svm->tsc_aux;
		break;
J
Joerg Roedel 已提交
4149 4150 4151 4152 4153
	/*
	 * Nobody will change the following 5 values in the VMCB so we can
	 * safely return them on rdmsr. They will always be 0 until LBRV is
	 * implemented.
	 */
4154
	case MSR_IA32_DEBUGCTLMSR:
4155
		msr_info->data = svm->vmcb->save.dbgctl;
4156 4157
		break;
	case MSR_IA32_LASTBRANCHFROMIP:
4158
		msr_info->data = svm->vmcb->save.br_from;
4159 4160
		break;
	case MSR_IA32_LASTBRANCHTOIP:
4161
		msr_info->data = svm->vmcb->save.br_to;
4162 4163
		break;
	case MSR_IA32_LASTINTFROMIP:
4164
		msr_info->data = svm->vmcb->save.last_excp_from;
4165 4166
		break;
	case MSR_IA32_LASTINTTOIP:
4167
		msr_info->data = svm->vmcb->save.last_excp_to;
4168
		break;
A
Alexander Graf 已提交
4169
	case MSR_VM_HSAVE_PA:
4170
		msr_info->data = svm->nested.hsave_msr;
A
Alexander Graf 已提交
4171
		break;
4172
	case MSR_VM_CR:
4173
		msr_info->data = svm->nested.vm_cr_msr;
4174
		break;
4175 4176
	case MSR_IA32_SPEC_CTRL:
		if (!msr_info->host_initiated &&
4177 4178
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBRS) &&
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_SSBD))
4179 4180 4181 4182
			return 1;

		msr_info->data = svm->spec_ctrl;
		break;
4183 4184 4185 4186 4187 4188 4189
	case MSR_AMD64_VIRT_SPEC_CTRL:
		if (!msr_info->host_initiated &&
		    !guest_cpuid_has(vcpu, X86_FEATURE_VIRT_SSBD))
			return 1;

		msr_info->data = svm->virt_spec_ctrl;
		break;
4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206
	case MSR_F15H_IC_CFG: {

		int family, model;

		family = guest_cpuid_family(vcpu);
		model  = guest_cpuid_model(vcpu);

		if (family < 0 || model < 0)
			return kvm_get_msr_common(vcpu, msr_info);

		msr_info->data = 0;

		if (family == 0x15 &&
		    (model >= 0x2 && model < 0x20))
			msr_info->data = 0x1E;
		}
		break;
4207 4208 4209
	case MSR_F10H_DECFG:
		msr_info->data = svm->msr_decfg;
		break;
A
Avi Kivity 已提交
4210
	default:
4211
		return kvm_get_msr_common(vcpu, msr_info);
A
Avi Kivity 已提交
4212 4213 4214 4215
	}
	return 0;
}

A
Avi Kivity 已提交
4216
static int rdmsr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4217
{
4218
	return kvm_emulate_rdmsr(&svm->vcpu);
A
Avi Kivity 已提交
4219 4220
}

4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245
static int svm_set_vm_cr(struct kvm_vcpu *vcpu, u64 data)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	int svm_dis, chg_mask;

	if (data & ~SVM_VM_CR_VALID_MASK)
		return 1;

	chg_mask = SVM_VM_CR_VALID_MASK;

	if (svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK)
		chg_mask &= ~(SVM_VM_CR_SVM_LOCK_MASK | SVM_VM_CR_SVM_DIS_MASK);

	svm->nested.vm_cr_msr &= ~chg_mask;
	svm->nested.vm_cr_msr |= (data & chg_mask);

	svm_dis = svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK;

	/* check for svm_disable while efer.svme is set */
	if (svm_dis && (vcpu->arch.efer & EFER_SVME))
		return 1;

	return 0;
}

4246
static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
A
Avi Kivity 已提交
4247
{
4248 4249
	struct vcpu_svm *svm = to_svm(vcpu);

4250 4251
	u32 ecx = msr->index;
	u64 data = msr->data;
A
Avi Kivity 已提交
4252
	switch (ecx) {
P
Paolo Bonzini 已提交
4253 4254 4255 4256 4257 4258 4259
	case MSR_IA32_CR_PAT:
		if (!kvm_mtrr_valid(vcpu, MSR_IA32_CR_PAT, data))
			return 1;
		vcpu->arch.pat = data;
		svm->vmcb->save.g_pat = data;
		mark_dirty(svm->vmcb, VMCB_NPT);
		break;
4260 4261
	case MSR_IA32_SPEC_CTRL:
		if (!msr->host_initiated &&
4262 4263
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBRS) &&
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_SSBD))
4264 4265 4266
			return 1;

		/* The STIBP bit doesn't fault even if it's not advertised */
4267
		if (data & ~(SPEC_CTRL_IBRS | SPEC_CTRL_STIBP | SPEC_CTRL_SSBD))
4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287
			return 1;

		svm->spec_ctrl = data;

		if (!data)
			break;

		/*
		 * For non-nested:
		 * When it's written (to non-zero) for the first time, pass
		 * it through.
		 *
		 * For nested:
		 * The handling of the MSR bitmap for L2 guests is done in
		 * nested_svm_vmrun_msrpm.
		 * We update the L1 MSR bit as well since it will end up
		 * touching the MSR anyway now.
		 */
		set_msr_interception(svm->msrpm, MSR_IA32_SPEC_CTRL, 1, 1);
		break;
A
Ashok Raj 已提交
4288 4289
	case MSR_IA32_PRED_CMD:
		if (!msr->host_initiated &&
4290
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBPB))
A
Ashok Raj 已提交
4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303
			return 1;

		if (data & ~PRED_CMD_IBPB)
			return 1;

		if (!data)
			break;

		wrmsrl(MSR_IA32_PRED_CMD, PRED_CMD_IBPB);
		if (is_guest_mode(vcpu))
			break;
		set_msr_interception(svm->msrpm, MSR_IA32_PRED_CMD, 0, 1);
		break;
4304 4305 4306 4307 4308 4309 4310 4311 4312 4313
	case MSR_AMD64_VIRT_SPEC_CTRL:
		if (!msr->host_initiated &&
		    !guest_cpuid_has(vcpu, X86_FEATURE_VIRT_SSBD))
			return 1;

		if (data & ~SPEC_CTRL_SSBD)
			return 1;

		svm->virt_spec_ctrl = data;
		break;
B
Brian Gerst 已提交
4314
	case MSR_STAR:
4315
		svm->vmcb->save.star = data;
A
Avi Kivity 已提交
4316
		break;
4317
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
4318
	case MSR_LSTAR:
4319
		svm->vmcb->save.lstar = data;
A
Avi Kivity 已提交
4320 4321
		break;
	case MSR_CSTAR:
4322
		svm->vmcb->save.cstar = data;
A
Avi Kivity 已提交
4323 4324
		break;
	case MSR_KERNEL_GS_BASE:
4325
		svm->vmcb->save.kernel_gs_base = data;
A
Avi Kivity 已提交
4326 4327
		break;
	case MSR_SYSCALL_MASK:
4328
		svm->vmcb->save.sfmask = data;
A
Avi Kivity 已提交
4329 4330 4331
		break;
#endif
	case MSR_IA32_SYSENTER_CS:
4332
		svm->vmcb->save.sysenter_cs = data;
A
Avi Kivity 已提交
4333 4334
		break;
	case MSR_IA32_SYSENTER_EIP:
4335
		svm->sysenter_eip = data;
4336
		svm->vmcb->save.sysenter_eip = data;
A
Avi Kivity 已提交
4337 4338
		break;
	case MSR_IA32_SYSENTER_ESP:
4339
		svm->sysenter_esp = data;
4340
		svm->vmcb->save.sysenter_esp = data;
A
Avi Kivity 已提交
4341
		break;
P
Paolo Bonzini 已提交
4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353
	case MSR_TSC_AUX:
		if (!boot_cpu_has(X86_FEATURE_RDTSCP))
			return 1;

		/*
		 * This is rare, so we update the MSR here instead of using
		 * direct_access_msrs.  Doing that would require a rdmsr in
		 * svm_vcpu_put.
		 */
		svm->tsc_aux = data;
		wrmsrl(MSR_TSC_AUX, svm->tsc_aux);
		break;
4354
	case MSR_IA32_DEBUGCTLMSR:
4355
		if (!boot_cpu_has(X86_FEATURE_LBRV)) {
4356 4357
			vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n",
				    __func__, data);
4358 4359 4360 4361 4362 4363
			break;
		}
		if (data & DEBUGCTL_RESERVED_BITS)
			return 1;

		svm->vmcb->save.dbgctl = data;
4364
		mark_dirty(svm->vmcb, VMCB_LBR);
4365 4366 4367 4368
		if (data & (1ULL<<0))
			svm_enable_lbrv(svm);
		else
			svm_disable_lbrv(svm);
4369
		break;
A
Alexander Graf 已提交
4370
	case MSR_VM_HSAVE_PA:
4371
		svm->nested.hsave_msr = data;
4372
		break;
4373
	case MSR_VM_CR:
4374
		return svm_set_vm_cr(vcpu, data);
4375
	case MSR_VM_IGNNE:
4376
		vcpu_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data);
4377
		break;
4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395
	case MSR_F10H_DECFG: {
		struct kvm_msr_entry msr_entry;

		msr_entry.index = msr->index;
		if (svm_get_msr_feature(&msr_entry))
			return 1;

		/* Check the supported bits */
		if (data & ~msr_entry.data)
			return 1;

		/* Don't allow the guest to change a bit, #GP */
		if (!msr->host_initiated && (data ^ msr_entry.data))
			return 1;

		svm->msr_decfg = data;
		break;
	}
4396 4397 4398
	case MSR_IA32_APICBASE:
		if (kvm_vcpu_apicv_active(vcpu))
			avic_update_vapic_bar(to_svm(vcpu), data);
4399
		/* Fall through */
A
Avi Kivity 已提交
4400
	default:
4401
		return kvm_set_msr_common(vcpu, msr);
A
Avi Kivity 已提交
4402 4403 4404 4405
	}
	return 0;
}

A
Avi Kivity 已提交
4406
static int wrmsr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4407
{
4408
	return kvm_emulate_wrmsr(&svm->vcpu);
A
Avi Kivity 已提交
4409 4410
}

A
Avi Kivity 已提交
4411
static int msr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4412
{
R
Rusty Russell 已提交
4413
	if (svm->vmcb->control.exit_info_1)
A
Avi Kivity 已提交
4414
		return wrmsr_interception(svm);
A
Avi Kivity 已提交
4415
	else
A
Avi Kivity 已提交
4416
		return rdmsr_interception(svm);
A
Avi Kivity 已提交
4417 4418
}

A
Avi Kivity 已提交
4419
static int interrupt_window_interception(struct vcpu_svm *svm)
4420
{
4421
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
4422
	svm_clear_vintr(svm);
4423
	svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
4424
	mark_dirty(svm->vmcb, VMCB_INTR);
4425
	++svm->vcpu.stat.irq_window_exits;
4426 4427 4428
	return 1;
}

4429 4430
static int pause_interception(struct vcpu_svm *svm)
{
4431 4432 4433
	struct kvm_vcpu *vcpu = &svm->vcpu;
	bool in_kernel = (svm_get_cpl(vcpu) == 0);

4434 4435 4436
	if (pause_filter_thresh)
		grow_ple_window(vcpu);

4437
	kvm_vcpu_on_spin(vcpu, in_kernel);
4438 4439 4440
	return 1;
}

4441 4442
static int nop_interception(struct vcpu_svm *svm)
{
4443
	return kvm_skip_emulated_instruction(&(svm->vcpu));
4444 4445 4446 4447 4448 4449 4450 4451 4452 4453 4454 4455 4456 4457
}

static int monitor_interception(struct vcpu_svm *svm)
{
	printk_once(KERN_WARNING "kvm: MONITOR instruction emulated as NOP!\n");
	return nop_interception(svm);
}

static int mwait_interception(struct vcpu_svm *svm)
{
	printk_once(KERN_WARNING "kvm: MWAIT instruction emulated as NOP!\n");
	return nop_interception(svm);
}

4458 4459 4460 4461 4462 4463 4464 4465 4466 4467 4468 4469
enum avic_ipi_failure_cause {
	AVIC_IPI_FAILURE_INVALID_INT_TYPE,
	AVIC_IPI_FAILURE_TARGET_NOT_RUNNING,
	AVIC_IPI_FAILURE_INVALID_TARGET,
	AVIC_IPI_FAILURE_INVALID_BACKING_PAGE,
};

static int avic_incomplete_ipi_interception(struct vcpu_svm *svm)
{
	u32 icrh = svm->vmcb->control.exit_info_1 >> 32;
	u32 icrl = svm->vmcb->control.exit_info_1;
	u32 id = svm->vmcb->control.exit_info_2 >> 32;
D
Dan Carpenter 已提交
4470
	u32 index = svm->vmcb->control.exit_info_2 & 0xFF;
4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 4486 4487 4488 4489 4490 4491
	struct kvm_lapic *apic = svm->vcpu.arch.apic;

	trace_kvm_avic_incomplete_ipi(svm->vcpu.vcpu_id, icrh, icrl, id, index);

	switch (id) {
	case AVIC_IPI_FAILURE_INVALID_INT_TYPE:
		/*
		 * AVIC hardware handles the generation of
		 * IPIs when the specified Message Type is Fixed
		 * (also known as fixed delivery mode) and
		 * the Trigger Mode is edge-triggered. The hardware
		 * also supports self and broadcast delivery modes
		 * specified via the Destination Shorthand(DSH)
		 * field of the ICRL. Logical and physical APIC ID
		 * formats are supported. All other IPI types cause
		 * a #VMEXIT, which needs to emulated.
		 */
		kvm_lapic_reg_write(apic, APIC_ICR2, icrh);
		kvm_lapic_reg_write(apic, APIC_ICR, icrl);
		break;
	case AVIC_IPI_FAILURE_TARGET_NOT_RUNNING: {
4492 4493 4494
		int i;
		struct kvm_vcpu *vcpu;
		struct kvm *kvm = svm->vcpu.kvm;
4495 4496 4497
		struct kvm_lapic *apic = svm->vcpu.arch.apic;

		/*
4498 4499 4500
		 * At this point, we expect that the AVIC HW has already
		 * set the appropriate IRR bits on the valid target
		 * vcpus. So, we just need to kick the appropriate vcpu.
4501
		 */
4502 4503 4504 4505 4506 4507 4508 4509 4510
		kvm_for_each_vcpu(i, vcpu, kvm) {
			bool m = kvm_apic_match_dest(vcpu, apic,
						     icrl & KVM_APIC_SHORT_MASK,
						     GET_APIC_DEST_FIELD(icrh),
						     icrl & KVM_APIC_DEST_MASK);

			if (m && !avic_vcpu_is_running(vcpu))
				kvm_vcpu_wake_up(vcpu);
		}
4511 4512 4513
		break;
	}
	case AVIC_IPI_FAILURE_INVALID_TARGET:
4514 4515
		WARN_ONCE(1, "Invalid IPI target: index=%u, vcpu=%d, icr=%#0x:%#0x\n",
			  index, svm->vcpu.vcpu_id, icrh, icrl);
4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528
		break;
	case AVIC_IPI_FAILURE_INVALID_BACKING_PAGE:
		WARN_ONCE(1, "Invalid backing page\n");
		break;
	default:
		pr_err("Unknown IPI interception\n");
	}

	return 1;
}

static u32 *avic_get_logical_id_entry(struct kvm_vcpu *vcpu, u32 ldr, bool flat)
{
4529
	struct kvm_svm *kvm_svm = to_kvm_svm(vcpu->kvm);
4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550
	int index;
	u32 *logical_apic_id_table;
	int dlid = GET_APIC_LOGICAL_ID(ldr);

	if (!dlid)
		return NULL;

	if (flat) { /* flat */
		index = ffs(dlid) - 1;
		if (index > 7)
			return NULL;
	} else { /* cluster */
		int cluster = (dlid & 0xf0) >> 4;
		int apic = ffs(dlid & 0x0f) - 1;

		if ((apic < 0) || (apic > 7) ||
		    (cluster >= 0xf))
			return NULL;
		index = (cluster << 2) + apic;
	}

4551
	logical_apic_id_table = (u32 *) page_address(kvm_svm->avic_logical_id_table_page);
4552 4553 4554 4555

	return &logical_apic_id_table[index];
}

4556
static int avic_ldr_write(struct kvm_vcpu *vcpu, u8 g_physical_id, u32 ldr)
4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568
{
	bool flat;
	u32 *entry, new_entry;

	flat = kvm_lapic_get_reg(vcpu->arch.apic, APIC_DFR) == APIC_DFR_FLAT;
	entry = avic_get_logical_id_entry(vcpu, ldr, flat);
	if (!entry)
		return -EINVAL;

	new_entry = READ_ONCE(*entry);
	new_entry &= ~AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK;
	new_entry |= (g_physical_id & AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK);
4569
	new_entry |= AVIC_LOGICAL_ID_ENTRY_VALID_MASK;
4570 4571 4572 4573 4574
	WRITE_ONCE(*entry, new_entry);

	return 0;
}

4575 4576 4577 4578 4579 4580 4581
static void avic_invalidate_logical_id_entry(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	bool flat = svm->dfr_reg == APIC_DFR_FLAT;
	u32 *entry = avic_get_logical_id_entry(vcpu, svm->ldr_reg, flat);

	if (entry)
4582
		clear_bit(AVIC_LOGICAL_ID_ENTRY_VALID_BIT, (unsigned long *)entry);
4583 4584
}

4585 4586
static int avic_handle_ldr_update(struct kvm_vcpu *vcpu)
{
4587
	int ret = 0;
4588 4589 4590
	struct vcpu_svm *svm = to_svm(vcpu);
	u32 ldr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_LDR);

4591 4592
	if (ldr == svm->ldr_reg)
		return 0;
4593

4594 4595 4596 4597 4598 4599
	avic_invalidate_logical_id_entry(vcpu);

	if (ldr)
		ret = avic_ldr_write(vcpu, vcpu->vcpu_id, ldr);

	if (!ret)
4600
		svm->ldr_reg = ldr;
4601

4602 4603 4604 4605 4606 4607 4608 4609 4610 4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634
	return ret;
}

static int avic_handle_apic_id_update(struct kvm_vcpu *vcpu)
{
	u64 *old, *new;
	struct vcpu_svm *svm = to_svm(vcpu);
	u32 apic_id_reg = kvm_lapic_get_reg(vcpu->arch.apic, APIC_ID);
	u32 id = (apic_id_reg >> 24) & 0xff;

	if (vcpu->vcpu_id == id)
		return 0;

	old = avic_get_physical_id_entry(vcpu, vcpu->vcpu_id);
	new = avic_get_physical_id_entry(vcpu, id);
	if (!new || !old)
		return 1;

	/* We need to move physical_id_entry to new offset */
	*new = *old;
	*old = 0ULL;
	to_svm(vcpu)->avic_physical_id_cache = new;

	/*
	 * Also update the guest physical APIC ID in the logical
	 * APIC ID table entry if already setup the LDR.
	 */
	if (svm->ldr_reg)
		avic_handle_ldr_update(vcpu);

	return 0;
}

4635
static void avic_handle_dfr_update(struct kvm_vcpu *vcpu)
4636 4637 4638 4639
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u32 dfr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_DFR);

4640 4641
	if (svm->dfr_reg == dfr)
		return;
4642

4643 4644
	avic_invalidate_logical_id_entry(vcpu);
	svm->dfr_reg = dfr;
4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721
}

static int avic_unaccel_trap_write(struct vcpu_svm *svm)
{
	struct kvm_lapic *apic = svm->vcpu.arch.apic;
	u32 offset = svm->vmcb->control.exit_info_1 &
				AVIC_UNACCEL_ACCESS_OFFSET_MASK;

	switch (offset) {
	case APIC_ID:
		if (avic_handle_apic_id_update(&svm->vcpu))
			return 0;
		break;
	case APIC_LDR:
		if (avic_handle_ldr_update(&svm->vcpu))
			return 0;
		break;
	case APIC_DFR:
		avic_handle_dfr_update(&svm->vcpu);
		break;
	default:
		break;
	}

	kvm_lapic_reg_write(apic, offset, kvm_lapic_get_reg(apic, offset));

	return 1;
}

static bool is_avic_unaccelerated_access_trap(u32 offset)
{
	bool ret = false;

	switch (offset) {
	case APIC_ID:
	case APIC_EOI:
	case APIC_RRR:
	case APIC_LDR:
	case APIC_DFR:
	case APIC_SPIV:
	case APIC_ESR:
	case APIC_ICR:
	case APIC_LVTT:
	case APIC_LVTTHMR:
	case APIC_LVTPC:
	case APIC_LVT0:
	case APIC_LVT1:
	case APIC_LVTERR:
	case APIC_TMICT:
	case APIC_TDCR:
		ret = true;
		break;
	default:
		break;
	}
	return ret;
}

static int avic_unaccelerated_access_interception(struct vcpu_svm *svm)
{
	int ret = 0;
	u32 offset = svm->vmcb->control.exit_info_1 &
		     AVIC_UNACCEL_ACCESS_OFFSET_MASK;
	u32 vector = svm->vmcb->control.exit_info_2 &
		     AVIC_UNACCEL_ACCESS_VECTOR_MASK;
	bool write = (svm->vmcb->control.exit_info_1 >> 32) &
		     AVIC_UNACCEL_ACCESS_WRITE_MASK;
	bool trap = is_avic_unaccelerated_access_trap(offset);

	trace_kvm_avic_unaccelerated_access(svm->vcpu.vcpu_id, offset,
					    trap, write, vector);
	if (trap) {
		/* Handling Trap */
		WARN_ONCE(!write, "svm: Handling trap read.\n");
		ret = avic_unaccel_trap_write(svm);
	} else {
		/* Handling Fault */
4722
		ret = (kvm_emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE);
4723 4724 4725 4726 4727
	}

	return ret;
}

4728
static int (*const svm_exit_handlers[])(struct vcpu_svm *svm) = {
4729 4730 4731 4732
	[SVM_EXIT_READ_CR0]			= cr_interception,
	[SVM_EXIT_READ_CR3]			= cr_interception,
	[SVM_EXIT_READ_CR4]			= cr_interception,
	[SVM_EXIT_READ_CR8]			= cr_interception,
4733
	[SVM_EXIT_CR0_SEL_WRITE]		= cr_interception,
4734
	[SVM_EXIT_WRITE_CR0]			= cr_interception,
4735 4736
	[SVM_EXIT_WRITE_CR3]			= cr_interception,
	[SVM_EXIT_WRITE_CR4]			= cr_interception,
J
Joerg Roedel 已提交
4737
	[SVM_EXIT_WRITE_CR8]			= cr8_write_interception,
4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753
	[SVM_EXIT_READ_DR0]			= dr_interception,
	[SVM_EXIT_READ_DR1]			= dr_interception,
	[SVM_EXIT_READ_DR2]			= dr_interception,
	[SVM_EXIT_READ_DR3]			= dr_interception,
	[SVM_EXIT_READ_DR4]			= dr_interception,
	[SVM_EXIT_READ_DR5]			= dr_interception,
	[SVM_EXIT_READ_DR6]			= dr_interception,
	[SVM_EXIT_READ_DR7]			= dr_interception,
	[SVM_EXIT_WRITE_DR0]			= dr_interception,
	[SVM_EXIT_WRITE_DR1]			= dr_interception,
	[SVM_EXIT_WRITE_DR2]			= dr_interception,
	[SVM_EXIT_WRITE_DR3]			= dr_interception,
	[SVM_EXIT_WRITE_DR4]			= dr_interception,
	[SVM_EXIT_WRITE_DR5]			= dr_interception,
	[SVM_EXIT_WRITE_DR6]			= dr_interception,
	[SVM_EXIT_WRITE_DR7]			= dr_interception,
J
Jan Kiszka 已提交
4754 4755
	[SVM_EXIT_EXCP_BASE + DB_VECTOR]	= db_interception,
	[SVM_EXIT_EXCP_BASE + BP_VECTOR]	= bp_interception,
4756
	[SVM_EXIT_EXCP_BASE + UD_VECTOR]	= ud_interception,
J
Joerg Roedel 已提交
4757 4758
	[SVM_EXIT_EXCP_BASE + PF_VECTOR]	= pf_interception,
	[SVM_EXIT_EXCP_BASE + MC_VECTOR]	= mc_interception,
4759
	[SVM_EXIT_EXCP_BASE + AC_VECTOR]	= ac_interception,
4760
	[SVM_EXIT_EXCP_BASE + GP_VECTOR]	= gp_interception,
J
Joerg Roedel 已提交
4761
	[SVM_EXIT_INTR]				= intr_interception,
4762
	[SVM_EXIT_NMI]				= nmi_interception,
A
Avi Kivity 已提交
4763 4764
	[SVM_EXIT_SMI]				= nop_on_interception,
	[SVM_EXIT_INIT]				= nop_on_interception,
4765
	[SVM_EXIT_VINTR]			= interrupt_window_interception,
A
Avi Kivity 已提交
4766
	[SVM_EXIT_RDPMC]			= rdpmc_interception,
A
Avi Kivity 已提交
4767
	[SVM_EXIT_CPUID]			= cpuid_interception,
4768
	[SVM_EXIT_IRET]                         = iret_interception,
4769
	[SVM_EXIT_INVD]                         = emulate_on_interception,
4770
	[SVM_EXIT_PAUSE]			= pause_interception,
A
Avi Kivity 已提交
4771
	[SVM_EXIT_HLT]				= halt_interception,
M
Marcelo Tosatti 已提交
4772
	[SVM_EXIT_INVLPG]			= invlpg_interception,
A
Alexander Graf 已提交
4773
	[SVM_EXIT_INVLPGA]			= invlpga_interception,
J
Joerg Roedel 已提交
4774
	[SVM_EXIT_IOIO]				= io_interception,
A
Avi Kivity 已提交
4775 4776
	[SVM_EXIT_MSR]				= msr_interception,
	[SVM_EXIT_TASK_SWITCH]			= task_switch_interception,
4777
	[SVM_EXIT_SHUTDOWN]			= shutdown_interception,
A
Alexander Graf 已提交
4778
	[SVM_EXIT_VMRUN]			= vmrun_interception,
4779
	[SVM_EXIT_VMMCALL]			= vmmcall_interception,
4780 4781
	[SVM_EXIT_VMLOAD]			= vmload_interception,
	[SVM_EXIT_VMSAVE]			= vmsave_interception,
4782 4783
	[SVM_EXIT_STGI]				= stgi_interception,
	[SVM_EXIT_CLGI]				= clgi_interception,
4784
	[SVM_EXIT_SKINIT]			= skinit_interception,
D
David Kaplan 已提交
4785
	[SVM_EXIT_WBINVD]                       = wbinvd_interception,
4786 4787
	[SVM_EXIT_MONITOR]			= monitor_interception,
	[SVM_EXIT_MWAIT]			= mwait_interception,
J
Joerg Roedel 已提交
4788
	[SVM_EXIT_XSETBV]			= xsetbv_interception,
4789
	[SVM_EXIT_NPF]				= npf_interception,
B
Brijesh Singh 已提交
4790
	[SVM_EXIT_RSM]                          = rsm_interception,
4791 4792
	[SVM_EXIT_AVIC_INCOMPLETE_IPI]		= avic_incomplete_ipi_interception,
	[SVM_EXIT_AVIC_UNACCELERATED_ACCESS]	= avic_unaccelerated_access_interception,
A
Avi Kivity 已提交
4793 4794
};

4795
static void dump_vmcb(struct kvm_vcpu *vcpu)
4796 4797 4798 4799 4800
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb_control_area *control = &svm->vmcb->control;
	struct vmcb_save_area *save = &svm->vmcb->save;

4801 4802 4803 4804 4805
	if (!dump_invalid_vmcb) {
		pr_warn_ratelimited("set kvm_amd.dump_invalid_vmcb=1 to dump internal KVM state.\n");
		return;
	}

4806
	pr_err("VMCB Control Area:\n");
4807 4808 4809 4810 4811 4812 4813
	pr_err("%-20s%04x\n", "cr_read:", control->intercept_cr & 0xffff);
	pr_err("%-20s%04x\n", "cr_write:", control->intercept_cr >> 16);
	pr_err("%-20s%04x\n", "dr_read:", control->intercept_dr & 0xffff);
	pr_err("%-20s%04x\n", "dr_write:", control->intercept_dr >> 16);
	pr_err("%-20s%08x\n", "exceptions:", control->intercept_exceptions);
	pr_err("%-20s%016llx\n", "intercepts:", control->intercept);
	pr_err("%-20s%d\n", "pause filter count:", control->pause_filter_count);
4814 4815
	pr_err("%-20s%d\n", "pause filter threshold:",
	       control->pause_filter_thresh);
4816 4817 4818 4819 4820 4821 4822 4823 4824 4825 4826 4827 4828 4829 4830
	pr_err("%-20s%016llx\n", "iopm_base_pa:", control->iopm_base_pa);
	pr_err("%-20s%016llx\n", "msrpm_base_pa:", control->msrpm_base_pa);
	pr_err("%-20s%016llx\n", "tsc_offset:", control->tsc_offset);
	pr_err("%-20s%d\n", "asid:", control->asid);
	pr_err("%-20s%d\n", "tlb_ctl:", control->tlb_ctl);
	pr_err("%-20s%08x\n", "int_ctl:", control->int_ctl);
	pr_err("%-20s%08x\n", "int_vector:", control->int_vector);
	pr_err("%-20s%08x\n", "int_state:", control->int_state);
	pr_err("%-20s%08x\n", "exit_code:", control->exit_code);
	pr_err("%-20s%016llx\n", "exit_info1:", control->exit_info_1);
	pr_err("%-20s%016llx\n", "exit_info2:", control->exit_info_2);
	pr_err("%-20s%08x\n", "exit_int_info:", control->exit_int_info);
	pr_err("%-20s%08x\n", "exit_int_info_err:", control->exit_int_info_err);
	pr_err("%-20s%lld\n", "nested_ctl:", control->nested_ctl);
	pr_err("%-20s%016llx\n", "nested_cr3:", control->nested_cr3);
4831
	pr_err("%-20s%016llx\n", "avic_vapic_bar:", control->avic_vapic_bar);
4832 4833
	pr_err("%-20s%08x\n", "event_inj:", control->event_inj);
	pr_err("%-20s%08x\n", "event_inj_err:", control->event_inj_err);
4834
	pr_err("%-20s%lld\n", "virt_ext:", control->virt_ext);
4835
	pr_err("%-20s%016llx\n", "next_rip:", control->next_rip);
4836 4837 4838
	pr_err("%-20s%016llx\n", "avic_backing_page:", control->avic_backing_page);
	pr_err("%-20s%016llx\n", "avic_logical_id:", control->avic_logical_id);
	pr_err("%-20s%016llx\n", "avic_physical_id:", control->avic_physical_id);
4839
	pr_err("VMCB State Save Area:\n");
4840 4841 4842 4843 4844 4845 4846 4847 4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877 4878 4879
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "es:",
	       save->es.selector, save->es.attrib,
	       save->es.limit, save->es.base);
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "cs:",
	       save->cs.selector, save->cs.attrib,
	       save->cs.limit, save->cs.base);
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "ss:",
	       save->ss.selector, save->ss.attrib,
	       save->ss.limit, save->ss.base);
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "ds:",
	       save->ds.selector, save->ds.attrib,
	       save->ds.limit, save->ds.base);
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "fs:",
	       save->fs.selector, save->fs.attrib,
	       save->fs.limit, save->fs.base);
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "gs:",
	       save->gs.selector, save->gs.attrib,
	       save->gs.limit, save->gs.base);
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "gdtr:",
	       save->gdtr.selector, save->gdtr.attrib,
	       save->gdtr.limit, save->gdtr.base);
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "ldtr:",
	       save->ldtr.selector, save->ldtr.attrib,
	       save->ldtr.limit, save->ldtr.base);
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "idtr:",
	       save->idtr.selector, save->idtr.attrib,
	       save->idtr.limit, save->idtr.base);
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "tr:",
	       save->tr.selector, save->tr.attrib,
	       save->tr.limit, save->tr.base);
4880 4881
	pr_err("cpl:            %d                efer:         %016llx\n",
		save->cpl, save->efer);
4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "cr0:", save->cr0, "cr2:", save->cr2);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "cr3:", save->cr3, "cr4:", save->cr4);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "dr6:", save->dr6, "dr7:", save->dr7);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "rip:", save->rip, "rflags:", save->rflags);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "rsp:", save->rsp, "rax:", save->rax);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "star:", save->star, "lstar:", save->lstar);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "cstar:", save->cstar, "sfmask:", save->sfmask);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "kernel_gs_base:", save->kernel_gs_base,
	       "sysenter_cs:", save->sysenter_cs);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "sysenter_esp:", save->sysenter_esp,
	       "sysenter_eip:", save->sysenter_eip);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "gpat:", save->g_pat, "dbgctl:", save->dbgctl);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "br_from:", save->br_from, "br_to:", save->br_to);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "excp_from:", save->last_excp_from,
	       "excp_to:", save->last_excp_to);
4909 4910
}

4911 4912 4913 4914 4915 4916 4917 4918
static void svm_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2)
{
	struct vmcb_control_area *control = &to_svm(vcpu)->vmcb->control;

	*info1 = control->exit_info_1;
	*info2 = control->exit_info_2;
}

A
Avi Kivity 已提交
4919
static int handle_exit(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
4920
{
4921
	struct vcpu_svm *svm = to_svm(vcpu);
A
Avi Kivity 已提交
4922
	struct kvm_run *kvm_run = vcpu->run;
4923
	u32 exit_code = svm->vmcb->control.exit_code;
A
Avi Kivity 已提交
4924

4925 4926
	trace_kvm_exit(exit_code, vcpu, KVM_ISA_SVM);

4927
	if (!is_cr_intercept(svm, INTERCEPT_CR0_WRITE))
4928 4929 4930
		vcpu->arch.cr0 = svm->vmcb->save.cr0;
	if (npt_enabled)
		vcpu->arch.cr3 = svm->vmcb->save.cr3;
4931

4932 4933 4934 4935 4936 4937 4938
	if (unlikely(svm->nested.exit_required)) {
		nested_svm_vmexit(svm);
		svm->nested.exit_required = false;

		return 1;
	}

4939
	if (is_guest_mode(vcpu)) {
4940 4941
		int vmexit;

4942 4943 4944 4945
		trace_kvm_nested_vmexit(svm->vmcb->save.rip, exit_code,
					svm->vmcb->control.exit_info_1,
					svm->vmcb->control.exit_info_2,
					svm->vmcb->control.exit_int_info,
4946 4947
					svm->vmcb->control.exit_int_info_err,
					KVM_ISA_SVM);
4948

4949 4950 4951 4952 4953 4954
		vmexit = nested_svm_exit_special(svm);

		if (vmexit == NESTED_EXIT_CONTINUE)
			vmexit = nested_svm_exit_handled(svm);

		if (vmexit == NESTED_EXIT_DONE)
4955 4956 4957
			return 1;
	}

4958 4959
	svm_complete_interrupts(svm);

4960 4961 4962 4963
	if (svm->vmcb->control.exit_code == SVM_EXIT_ERR) {
		kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
		kvm_run->fail_entry.hardware_entry_failure_reason
			= svm->vmcb->control.exit_code;
4964
		dump_vmcb(vcpu);
4965 4966 4967
		return 0;
	}

4968
	if (is_external_interrupt(svm->vmcb->control.exit_int_info) &&
4969
	    exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR &&
4970 4971
	    exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH &&
	    exit_code != SVM_EXIT_INTR && exit_code != SVM_EXIT_NMI)
4972
		printk(KERN_ERR "%s: unexpected exit_int_info 0x%x "
A
Avi Kivity 已提交
4973
		       "exit_code 0x%x\n",
4974
		       __func__, svm->vmcb->control.exit_int_info,
A
Avi Kivity 已提交
4975 4976
		       exit_code);

4977
	if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
J
Joe Perches 已提交
4978
	    || !svm_exit_handlers[exit_code]) {
4979 4980 4981 4982 4983 4984 4985 4986
		vcpu_unimpl(vcpu, "svm: unexpected exit reason 0x%x\n", exit_code);
		dump_vmcb(vcpu);
		vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
		vcpu->run->internal.suberror =
			KVM_INTERNAL_ERROR_UNEXPECTED_EXIT_REASON;
		vcpu->run->internal.ndata = 1;
		vcpu->run->internal.data[0] = exit_code;
		return 0;
A
Avi Kivity 已提交
4987 4988
	}

A
Avi Kivity 已提交
4989
	return svm_exit_handlers[exit_code](svm);
A
Avi Kivity 已提交
4990 4991 4992 4993 4994 4995
}

static void reload_tss(struct kvm_vcpu *vcpu)
{
	int cpu = raw_smp_processor_id();

4996 4997
	struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
	sd->tss_desc->type = 9; /* available 32/64-bit TSS */
A
Avi Kivity 已提交
4998 4999 5000
	load_TR_desc();
}

5001 5002 5003 5004 5005 5006 5007 5008 5009 5010 5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024
static void pre_sev_run(struct vcpu_svm *svm, int cpu)
{
	struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
	int asid = sev_get_asid(svm->vcpu.kvm);

	/* Assign the asid allocated with this SEV guest */
	svm->vmcb->control.asid = asid;

	/*
	 * Flush guest TLB:
	 *
	 * 1) when different VMCB for the same ASID is to be run on the same host CPU.
	 * 2) or this VMCB was executed on different host CPU in previous VMRUNs.
	 */
	if (sd->sev_vmcbs[asid] == svm->vmcb &&
	    svm->last_cpu == cpu)
		return;

	svm->last_cpu = cpu;
	sd->sev_vmcbs[asid] = svm->vmcb;
	svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ASID;
	mark_dirty(svm->vmcb, VMCB_ASID);
}

R
Rusty Russell 已提交
5025
static void pre_svm_run(struct vcpu_svm *svm)
A
Avi Kivity 已提交
5026 5027 5028
{
	int cpu = raw_smp_processor_id();

5029
	struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
A
Avi Kivity 已提交
5030

5031 5032 5033
	if (sev_guest(svm->vcpu.kvm))
		return pre_sev_run(svm, cpu);

5034
	/* FIXME: handle wraparound of asid_generation */
5035 5036
	if (svm->asid_generation != sd->asid_generation)
		new_asid(svm, sd);
A
Avi Kivity 已提交
5037 5038
}

5039 5040 5041 5042 5043 5044
static void svm_inject_nmi(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_NMI;
	vcpu->arch.hflags |= HF_NMI_MASK;
5045
	set_intercept(svm, INTERCEPT_IRET);
5046 5047
	++vcpu->stat.nmi_injections;
}
A
Avi Kivity 已提交
5048

5049
static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
A
Avi Kivity 已提交
5050 5051 5052
{
	struct vmcb_control_area *control;

5053
	/* The following fields are ignored when AVIC is enabled */
R
Rusty Russell 已提交
5054
	control = &svm->vmcb->control;
5055
	control->int_vector = irq;
A
Avi Kivity 已提交
5056 5057 5058
	control->int_ctl &= ~V_INTR_PRIO_MASK;
	control->int_ctl |= V_IRQ_MASK |
		((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
5059
	mark_dirty(svm->vmcb, VMCB_INTR);
A
Avi Kivity 已提交
5060 5061
}

5062
static void svm_set_irq(struct kvm_vcpu *vcpu)
E
Eddie Dong 已提交
5063 5064 5065
{
	struct vcpu_svm *svm = to_svm(vcpu);

5066
	BUG_ON(!(gif_set(svm)));
5067

5068 5069 5070
	trace_kvm_inj_virq(vcpu->arch.interrupt.nr);
	++vcpu->stat.irq_injections;

5071 5072
	svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr |
		SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR;
E
Eddie Dong 已提交
5073 5074
}

5075 5076 5077 5078 5079
static inline bool svm_nested_virtualize_tpr(struct kvm_vcpu *vcpu)
{
	return is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK);
}

5080
static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
5081 5082 5083
{
	struct vcpu_svm *svm = to_svm(vcpu);

5084 5085
	if (svm_nested_virtualize_tpr(vcpu) ||
	    kvm_vcpu_apicv_active(vcpu))
5086 5087
		return;

5088 5089
	clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);

5090
	if (irr == -1)
5091 5092
		return;

5093
	if (tpr >= irr)
5094
		set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
5095
}
5096

5097
static void svm_set_virtual_apic_mode(struct kvm_vcpu *vcpu)
5098 5099 5100 5101
{
	return;
}

5102
static bool svm_get_enable_apicv(struct kvm_vcpu *vcpu)
5103
{
5104
	return avic && irqchip_split(vcpu->kvm);
5105 5106 5107 5108
}

static void svm_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr)
{
5109 5110
}

5111
static void svm_hwapic_isr_update(struct kvm_vcpu *vcpu, int max_isr)
5112
{
5113 5114
}

5115
/* Note: Currently only used by Hyper-V. */
5116
static void svm_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu)
5117
{
5118 5119 5120
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *vmcb = svm->vmcb;

5121 5122 5123 5124 5125
	if (kvm_vcpu_apicv_active(vcpu))
		vmcb->control.int_ctl |= AVIC_ENABLE_MASK;
	else
		vmcb->control.int_ctl &= ~AVIC_ENABLE_MASK;
	mark_dirty(vmcb, VMCB_AVIC);
5126 5127
}

5128
static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
5129 5130 5131 5132
{
	return;
}

5133 5134 5135 5136 5137
static void svm_deliver_avic_intr(struct kvm_vcpu *vcpu, int vec)
{
	kvm_lapic_set_irr(vec, vcpu->arch.apic);
	smp_mb__after_atomic();

5138 5139 5140 5141 5142 5143 5144
	if (avic_vcpu_is_running(vcpu)) {
		int cpuid = vcpu->cpu;

		if (cpuid != get_cpu())
			wrmsrl(SVM_AVIC_DOORBELL, kvm_cpu_get_apicid(cpuid));
		put_cpu();
	} else
5145 5146 5147
		kvm_vcpu_wake_up(vcpu);
}

5148 5149 5150 5151 5152
static bool svm_dy_apicv_has_pending_interrupt(struct kvm_vcpu *vcpu)
{
	return false;
}

5153 5154 5155 5156 5157 5158 5159 5160 5161 5162 5163 5164 5165 5166 5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177 5178 5179 5180 5181 5182 5183 5184 5185 5186 5187 5188 5189 5190 5191 5192 5193 5194 5195 5196 5197 5198
static void svm_ir_list_del(struct vcpu_svm *svm, struct amd_iommu_pi_data *pi)
{
	unsigned long flags;
	struct amd_svm_iommu_ir *cur;

	spin_lock_irqsave(&svm->ir_list_lock, flags);
	list_for_each_entry(cur, &svm->ir_list, node) {
		if (cur->data != pi->ir_data)
			continue;
		list_del(&cur->node);
		kfree(cur);
		break;
	}
	spin_unlock_irqrestore(&svm->ir_list_lock, flags);
}

static int svm_ir_list_add(struct vcpu_svm *svm, struct amd_iommu_pi_data *pi)
{
	int ret = 0;
	unsigned long flags;
	struct amd_svm_iommu_ir *ir;

	/**
	 * In some cases, the existing irte is updaed and re-set,
	 * so we need to check here if it's already been * added
	 * to the ir_list.
	 */
	if (pi->ir_data && (pi->prev_ga_tag != 0)) {
		struct kvm *kvm = svm->vcpu.kvm;
		u32 vcpu_id = AVIC_GATAG_TO_VCPUID(pi->prev_ga_tag);
		struct kvm_vcpu *prev_vcpu = kvm_get_vcpu_by_id(kvm, vcpu_id);
		struct vcpu_svm *prev_svm;

		if (!prev_vcpu) {
			ret = -EINVAL;
			goto out;
		}

		prev_svm = to_svm(prev_vcpu);
		svm_ir_list_del(prev_svm, pi);
	}

	/**
	 * Allocating new amd_iommu_pi_data, which will get
	 * add to the per-vcpu ir_list.
	 */
5199
	ir = kzalloc(sizeof(struct amd_svm_iommu_ir), GFP_KERNEL_ACCOUNT);
5200 5201 5202 5203 5204 5205 5206 5207 5208 5209 5210 5211 5212 5213 5214 5215 5216 5217 5218 5219 5220 5221 5222 5223 5224 5225 5226 5227 5228 5229 5230 5231 5232
	if (!ir) {
		ret = -ENOMEM;
		goto out;
	}
	ir->data = pi->ir_data;

	spin_lock_irqsave(&svm->ir_list_lock, flags);
	list_add(&ir->node, &svm->ir_list);
	spin_unlock_irqrestore(&svm->ir_list_lock, flags);
out:
	return ret;
}

/**
 * Note:
 * The HW cannot support posting multicast/broadcast
 * interrupts to a vCPU. So, we still use legacy interrupt
 * remapping for these kind of interrupts.
 *
 * For lowest-priority interrupts, we only support
 * those with single CPU as the destination, e.g. user
 * configures the interrupts via /proc/irq or uses
 * irqbalance to make the interrupts single-CPU.
 */
static int
get_pi_vcpu_info(struct kvm *kvm, struct kvm_kernel_irq_routing_entry *e,
		 struct vcpu_data *vcpu_info, struct vcpu_svm **svm)
{
	struct kvm_lapic_irq irq;
	struct kvm_vcpu *vcpu = NULL;

	kvm_set_msi_irq(kvm, e, &irq);

5233 5234
	if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu) ||
	    !kvm_irq_is_postable(&irq)) {
5235 5236 5237 5238 5239 5240 5241 5242
		pr_debug("SVM: %s: use legacy intr remap mode for irq %u\n",
			 __func__, irq.vector);
		return -1;
	}

	pr_debug("SVM: %s: use GA mode for irq %u\n", __func__,
		 irq.vector);
	*svm = to_svm(vcpu);
5243
	vcpu_info->pi_desc_addr = __sme_set(page_to_phys((*svm)->avic_backing_page));
5244 5245 5246 5247 5248 5249 5250 5251 5252 5253 5254 5255 5256 5257 5258 5259 5260 5261 5262 5263 5264 5265 5266 5267 5268 5269 5270 5271 5272 5273 5274 5275 5276 5277 5278 5279 5280 5281 5282 5283 5284 5285 5286 5287
	vcpu_info->vector = irq.vector;

	return 0;
}

/*
 * svm_update_pi_irte - set IRTE for Posted-Interrupts
 *
 * @kvm: kvm
 * @host_irq: host irq of the interrupt
 * @guest_irq: gsi of the interrupt
 * @set: set or unset PI
 * returns 0 on success, < 0 on failure
 */
static int svm_update_pi_irte(struct kvm *kvm, unsigned int host_irq,
			      uint32_t guest_irq, bool set)
{
	struct kvm_kernel_irq_routing_entry *e;
	struct kvm_irq_routing_table *irq_rt;
	int idx, ret = -EINVAL;

	if (!kvm_arch_has_assigned_device(kvm) ||
	    !irq_remapping_cap(IRQ_POSTING_CAP))
		return 0;

	pr_debug("SVM: %s: host_irq=%#x, guest_irq=%#x, set=%#x\n",
		 __func__, host_irq, guest_irq, set);

	idx = srcu_read_lock(&kvm->irq_srcu);
	irq_rt = srcu_dereference(kvm->irq_routing, &kvm->irq_srcu);
	WARN_ON(guest_irq >= irq_rt->nr_rt_entries);

	hlist_for_each_entry(e, &irq_rt->map[guest_irq], link) {
		struct vcpu_data vcpu_info;
		struct vcpu_svm *svm = NULL;

		if (e->type != KVM_IRQ_ROUTING_MSI)
			continue;

		/**
		 * Here, we setup with legacy mode in the following cases:
		 * 1. When cannot target interrupt to a specific vcpu.
		 * 2. Unsetting posted interrupt.
		 * 3. APIC virtialization is disabled for the vcpu.
5288
		 * 4. IRQ has incompatible delivery mode (SMI, INIT, etc)
5289 5290 5291 5292 5293 5294
		 */
		if (!get_pi_vcpu_info(kvm, e, &vcpu_info, &svm) && set &&
		    kvm_vcpu_apicv_active(&svm->vcpu)) {
			struct amd_iommu_pi_data pi;

			/* Try to enable guest_mode in IRTE */
5295 5296
			pi.base = __sme_set(page_to_phys(svm->avic_backing_page) &
					    AVIC_HPA_MASK);
5297
			pi.ga_tag = AVIC_GATAG(to_kvm_svm(kvm)->avic_vm_id,
5298 5299 5300 5301 5302 5303 5304 5305 5306 5307 5308 5309 5310 5311 5312 5313 5314 5315 5316 5317 5318 5319 5320 5321 5322 5323 5324 5325 5326 5327 5328 5329 5330 5331 5332 5333 5334 5335 5336 5337 5338 5339 5340
						     svm->vcpu.vcpu_id);
			pi.is_guest_mode = true;
			pi.vcpu_data = &vcpu_info;
			ret = irq_set_vcpu_affinity(host_irq, &pi);

			/**
			 * Here, we successfully setting up vcpu affinity in
			 * IOMMU guest mode. Now, we need to store the posted
			 * interrupt information in a per-vcpu ir_list so that
			 * we can reference to them directly when we update vcpu
			 * scheduling information in IOMMU irte.
			 */
			if (!ret && pi.is_guest_mode)
				svm_ir_list_add(svm, &pi);
		} else {
			/* Use legacy mode in IRTE */
			struct amd_iommu_pi_data pi;

			/**
			 * Here, pi is used to:
			 * - Tell IOMMU to use legacy mode for this interrupt.
			 * - Retrieve ga_tag of prior interrupt remapping data.
			 */
			pi.is_guest_mode = false;
			ret = irq_set_vcpu_affinity(host_irq, &pi);

			/**
			 * Check if the posted interrupt was previously
			 * setup with the guest_mode by checking if the ga_tag
			 * was cached. If so, we need to clean up the per-vcpu
			 * ir_list.
			 */
			if (!ret && pi.prev_ga_tag) {
				int id = AVIC_GATAG_TO_VCPUID(pi.prev_ga_tag);
				struct kvm_vcpu *vcpu;

				vcpu = kvm_get_vcpu_by_id(kvm, id);
				if (vcpu)
					svm_ir_list_del(to_svm(vcpu), &pi);
			}
		}

		if (!ret && svm) {
5341 5342
			trace_kvm_pi_irte_update(host_irq, svm->vcpu.vcpu_id,
						 e->gsi, vcpu_info.vector,
5343 5344 5345 5346 5347 5348 5349 5350 5351 5352 5353 5354 5355 5356 5357
						 vcpu_info.pi_desc_addr, set);
		}

		if (ret < 0) {
			pr_err("%s: failed to update PI IRTE\n", __func__);
			goto out;
		}
	}

	ret = 0;
out:
	srcu_read_unlock(&kvm->irq_srcu, idx);
	return ret;
}

5358 5359 5360 5361
static int svm_nmi_allowed(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *vmcb = svm->vmcb;
J
Joerg Roedel 已提交
5362 5363 5364 5365 5366 5367
	int ret;
	ret = !(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) &&
	      !(svm->vcpu.arch.hflags & HF_NMI_MASK);
	ret = ret && gif_set(svm) && nested_svm_nmi(svm);

	return ret;
5368 5369
}

J
Jan Kiszka 已提交
5370 5371 5372 5373 5374 5375 5376 5377 5378 5379 5380 5381 5382
static bool svm_get_nmi_mask(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	return !!(svm->vcpu.arch.hflags & HF_NMI_MASK);
}

static void svm_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	if (masked) {
		svm->vcpu.arch.hflags |= HF_NMI_MASK;
5383
		set_intercept(svm, INTERCEPT_IRET);
J
Jan Kiszka 已提交
5384 5385
	} else {
		svm->vcpu.arch.hflags &= ~HF_NMI_MASK;
5386
		clr_intercept(svm, INTERCEPT_IRET);
J
Jan Kiszka 已提交
5387 5388 5389
	}
}

5390 5391 5392 5393
static int svm_interrupt_allowed(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *vmcb = svm->vmcb;
5394 5395 5396 5397 5398 5399
	int ret;

	if (!gif_set(svm) ||
	     (vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK))
		return 0;

5400
	ret = !!(kvm_get_rflags(vcpu) & X86_EFLAGS_IF);
5401

5402
	if (is_guest_mode(vcpu))
5403 5404 5405
		return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK);

	return ret;
5406 5407
}

5408
static void enable_irq_window(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
5409
{
5410 5411
	struct vcpu_svm *svm = to_svm(vcpu);

5412 5413 5414
	if (kvm_vcpu_apicv_active(vcpu))
		return;

J
Joerg Roedel 已提交
5415 5416 5417 5418
	/*
	 * In case GIF=0 we can't rely on the CPU to tell us when GIF becomes
	 * 1, because that's a separate STGI/VMRUN intercept.  The next time we
	 * get that intercept, this function will be called again though and
5419 5420 5421
	 * we'll get the vintr intercept. However, if the vGIF feature is
	 * enabled, the STGI interception will not occur. Enable the irq
	 * window under the assumption that the hardware will set the GIF.
J
Joerg Roedel 已提交
5422
	 */
5423
	if ((vgif_enabled(svm) || gif_set(svm)) && nested_svm_intr(svm)) {
5424 5425 5426
		svm_set_vintr(svm);
		svm_inject_irq(svm, 0x0);
	}
5427 5428
}

5429
static void enable_nmi_window(struct kvm_vcpu *vcpu)
5430
{
5431
	struct vcpu_svm *svm = to_svm(vcpu);
5432

5433 5434
	if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK))
	    == HF_NMI_MASK)
5435
		return; /* IRET will cause a vm exit */
5436

5437 5438 5439
	if (!gif_set(svm)) {
		if (vgif_enabled(svm))
			set_intercept(svm, INTERCEPT_STGI);
5440
		return; /* STGI will cause a vm exit */
5441
	}
5442 5443 5444 5445

	if (svm->nested.exit_required)
		return; /* we're not going to run the guest yet */

J
Joerg Roedel 已提交
5446 5447 5448 5449
	/*
	 * Something prevents NMI from been injected. Single step over possible
	 * problem (IRET or exception injection or interrupt shadow)
	 */
5450
	svm->nmi_singlestep_guest_rflags = svm_get_rflags(vcpu);
J
Jan Kiszka 已提交
5451
	svm->nmi_singlestep = true;
5452
	svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);
5453 5454
}

5455 5456 5457 5458 5459
static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)
{
	return 0;
}

5460 5461 5462 5463 5464
static int svm_set_identity_map_addr(struct kvm *kvm, u64 ident_addr)
{
	return 0;
}

5465
static void svm_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa)
5466
{
5467 5468 5469 5470 5471 5472
	struct vcpu_svm *svm = to_svm(vcpu);

	if (static_cpu_has(X86_FEATURE_FLUSHBYASID))
		svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ASID;
	else
		svm->asid_generation--;
5473 5474
}

5475 5476 5477 5478 5479 5480 5481
static void svm_flush_tlb_gva(struct kvm_vcpu *vcpu, gva_t gva)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	invlpga(gva, svm->vmcb->control.asid);
}

5482 5483 5484 5485
static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
{
}

5486 5487 5488 5489
static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

5490
	if (svm_nested_virtualize_tpr(vcpu))
5491 5492
		return;

5493
	if (!is_cr_intercept(svm, INTERCEPT_CR8_WRITE)) {
5494
		int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK;
5495
		kvm_set_cr8(vcpu, cr8);
5496 5497 5498
	}
}

5499 5500 5501 5502 5503
static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u64 cr8;

5504 5505
	if (svm_nested_virtualize_tpr(vcpu) ||
	    kvm_vcpu_apicv_active(vcpu))
5506 5507
		return;

5508 5509 5510 5511 5512
	cr8 = kvm_get_cr8(vcpu);
	svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
	svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK;
}

5513 5514 5515 5516 5517
static void svm_complete_interrupts(struct vcpu_svm *svm)
{
	u8 vector;
	int type;
	u32 exitintinfo = svm->vmcb->control.exit_int_info;
5518 5519 5520
	unsigned int3_injected = svm->int3_injected;

	svm->int3_injected = 0;
5521

5522 5523 5524 5525 5526 5527
	/*
	 * If we've made progress since setting HF_IRET_MASK, we've
	 * executed an IRET and can allow NMI injection.
	 */
	if ((svm->vcpu.arch.hflags & HF_IRET_MASK)
	    && kvm_rip_read(&svm->vcpu) != svm->nmi_iret_rip) {
5528
		svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK);
5529 5530
		kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
	}
5531

5532 5533 5534 5535 5536 5537 5538
	svm->vcpu.arch.nmi_injected = false;
	kvm_clear_exception_queue(&svm->vcpu);
	kvm_clear_interrupt_queue(&svm->vcpu);

	if (!(exitintinfo & SVM_EXITINTINFO_VALID))
		return;

5539 5540
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);

5541 5542 5543 5544 5545 5546 5547 5548
	vector = exitintinfo & SVM_EXITINTINFO_VEC_MASK;
	type = exitintinfo & SVM_EXITINTINFO_TYPE_MASK;

	switch (type) {
	case SVM_EXITINTINFO_TYPE_NMI:
		svm->vcpu.arch.nmi_injected = true;
		break;
	case SVM_EXITINTINFO_TYPE_EXEPT:
5549 5550 5551 5552 5553 5554 5555 5556 5557 5558 5559
		/*
		 * In case of software exceptions, do not reinject the vector,
		 * but re-execute the instruction instead. Rewind RIP first
		 * if we emulated INT3 before.
		 */
		if (kvm_exception_is_soft(vector)) {
			if (vector == BP_VECTOR && int3_injected &&
			    kvm_is_linear_rip(&svm->vcpu, svm->int3_rip))
				kvm_rip_write(&svm->vcpu,
					      kvm_rip_read(&svm->vcpu) -
					      int3_injected);
5560
			break;
5561
		}
5562 5563
		if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) {
			u32 err = svm->vmcb->control.exit_int_info_err;
5564
			kvm_requeue_exception_e(&svm->vcpu, vector, err);
5565 5566

		} else
5567
			kvm_requeue_exception(&svm->vcpu, vector);
5568 5569
		break;
	case SVM_EXITINTINFO_TYPE_INTR:
5570
		kvm_queue_interrupt(&svm->vcpu, vector, false);
5571 5572 5573 5574 5575 5576
		break;
	default:
		break;
	}
}

A
Avi Kivity 已提交
5577 5578 5579 5580 5581 5582 5583 5584 5585 5586 5587
static void svm_cancel_injection(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb_control_area *control = &svm->vmcb->control;

	control->exit_int_info = control->event_inj;
	control->exit_int_info_err = control->event_inj_err;
	control->event_inj = 0;
	svm_complete_interrupts(svm);
}

A
Avi Kivity 已提交
5588
static void svm_vcpu_run(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
5589
{
5590
	struct vcpu_svm *svm = to_svm(vcpu);
5591

5592 5593 5594 5595
	svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX];
	svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP];
	svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP];

5596 5597 5598 5599 5600 5601 5602
	/*
	 * A vmexit emulation is required before the vcpu can be executed
	 * again.
	 */
	if (unlikely(svm->nested.exit_required))
		return;

5603 5604 5605 5606 5607 5608 5609 5610 5611 5612 5613 5614 5615 5616 5617 5618
	/*
	 * Disable singlestep if we're injecting an interrupt/exception.
	 * We don't want our modified rflags to be pushed on the stack where
	 * we might not be able to easily reset them if we disabled NMI
	 * singlestep later.
	 */
	if (svm->nmi_singlestep && svm->vmcb->control.event_inj) {
		/*
		 * Event injection happens before external interrupts cause a
		 * vmexit and interrupts are disabled here, so smp_send_reschedule
		 * is enough to force an immediate vmexit.
		 */
		disable_nmi_singlestep(svm);
		smp_send_reschedule(vcpu->cpu);
	}

R
Rusty Russell 已提交
5619
	pre_svm_run(svm);
A
Avi Kivity 已提交
5620

5621 5622
	sync_lapic_to_cr8(vcpu);

5623
	svm->vmcb->save.cr2 = vcpu->arch.cr2;
A
Avi Kivity 已提交
5624

5625
	clgi();
5626
	kvm_load_guest_xcr0(vcpu);
5627

5628 5629 5630 5631
	if (lapic_in_kernel(vcpu) &&
		vcpu->arch.apic->lapic_timer.timer_advance_ns)
		kvm_wait_lapic_expire(vcpu);

5632 5633 5634 5635 5636 5637
	/*
	 * If this vCPU has touched SPEC_CTRL, restore the guest's value if
	 * it's non-zero. Since vmentry is serialising on affected CPUs, there
	 * is no need to worry about the conditional branch over the wrmsr
	 * being speculatively taken.
	 */
5638
	x86_spec_ctrl_set_guest(svm->spec_ctrl, svm->virt_spec_ctrl);
5639

5640 5641
	local_irq_enable();

A
Avi Kivity 已提交
5642
	asm volatile (
A
Avi Kivity 已提交
5643 5644 5645 5646 5647 5648 5649
		"push %%" _ASM_BP "; \n\t"
		"mov %c[rbx](%[svm]), %%" _ASM_BX " \n\t"
		"mov %c[rcx](%[svm]), %%" _ASM_CX " \n\t"
		"mov %c[rdx](%[svm]), %%" _ASM_DX " \n\t"
		"mov %c[rsi](%[svm]), %%" _ASM_SI " \n\t"
		"mov %c[rdi](%[svm]), %%" _ASM_DI " \n\t"
		"mov %c[rbp](%[svm]), %%" _ASM_BP " \n\t"
5650
#ifdef CONFIG_X86_64
R
Rusty Russell 已提交
5651 5652 5653 5654 5655 5656 5657 5658
		"mov %c[r8](%[svm]),  %%r8  \n\t"
		"mov %c[r9](%[svm]),  %%r9  \n\t"
		"mov %c[r10](%[svm]), %%r10 \n\t"
		"mov %c[r11](%[svm]), %%r11 \n\t"
		"mov %c[r12](%[svm]), %%r12 \n\t"
		"mov %c[r13](%[svm]), %%r13 \n\t"
		"mov %c[r14](%[svm]), %%r14 \n\t"
		"mov %c[r15](%[svm]), %%r15 \n\t"
A
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5659 5660 5661
#endif

		/* Enter guest mode */
A
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5662 5663
		"push %%" _ASM_AX " \n\t"
		"mov %c[vmcb](%[svm]), %%" _ASM_AX " \n\t"
5664 5665 5666
		__ex("vmload %%" _ASM_AX) "\n\t"
		__ex("vmrun %%" _ASM_AX) "\n\t"
		__ex("vmsave %%" _ASM_AX) "\n\t"
A
Avi Kivity 已提交
5667
		"pop %%" _ASM_AX " \n\t"
A
Avi Kivity 已提交
5668 5669

		/* Save guest registers, load host registers */
A
Avi Kivity 已提交
5670 5671 5672 5673 5674 5675
		"mov %%" _ASM_BX ", %c[rbx](%[svm]) \n\t"
		"mov %%" _ASM_CX ", %c[rcx](%[svm]) \n\t"
		"mov %%" _ASM_DX ", %c[rdx](%[svm]) \n\t"
		"mov %%" _ASM_SI ", %c[rsi](%[svm]) \n\t"
		"mov %%" _ASM_DI ", %c[rdi](%[svm]) \n\t"
		"mov %%" _ASM_BP ", %c[rbp](%[svm]) \n\t"
5676
#ifdef CONFIG_X86_64
R
Rusty Russell 已提交
5677 5678 5679 5680 5681 5682 5683 5684
		"mov %%r8,  %c[r8](%[svm]) \n\t"
		"mov %%r9,  %c[r9](%[svm]) \n\t"
		"mov %%r10, %c[r10](%[svm]) \n\t"
		"mov %%r11, %c[r11](%[svm]) \n\t"
		"mov %%r12, %c[r12](%[svm]) \n\t"
		"mov %%r13, %c[r13](%[svm]) \n\t"
		"mov %%r14, %c[r14](%[svm]) \n\t"
		"mov %%r15, %c[r15](%[svm]) \n\t"
5685 5686 5687 5688
		/*
		* Clear host registers marked as clobbered to prevent
		* speculative use.
		*/
5689 5690 5691 5692 5693 5694 5695 5696
		"xor %%r8d, %%r8d \n\t"
		"xor %%r9d, %%r9d \n\t"
		"xor %%r10d, %%r10d \n\t"
		"xor %%r11d, %%r11d \n\t"
		"xor %%r12d, %%r12d \n\t"
		"xor %%r13d, %%r13d \n\t"
		"xor %%r14d, %%r14d \n\t"
		"xor %%r15d, %%r15d \n\t"
A
Avi Kivity 已提交
5697
#endif
5698 5699 5700 5701 5702
		"xor %%ebx, %%ebx \n\t"
		"xor %%ecx, %%ecx \n\t"
		"xor %%edx, %%edx \n\t"
		"xor %%esi, %%esi \n\t"
		"xor %%edi, %%edi \n\t"
A
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5703
		"pop %%" _ASM_BP
A
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5704
		:
R
Rusty Russell 已提交
5705
		: [svm]"a"(svm),
A
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5706
		  [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
5707 5708 5709 5710 5711 5712
		  [rbx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBX])),
		  [rcx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RCX])),
		  [rdx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDX])),
		  [rsi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RSI])),
		  [rdi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDI])),
		  [rbp]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBP]))
5713
#ifdef CONFIG_X86_64
5714 5715 5716 5717 5718 5719 5720 5721
		  , [r8]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R8])),
		  [r9]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R9])),
		  [r10]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R10])),
		  [r11]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R11])),
		  [r12]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R12])),
		  [r13]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R13])),
		  [r14]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R14])),
		  [r15]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R15]))
A
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5722
#endif
5723 5724
		: "cc", "memory"
#ifdef CONFIG_X86_64
A
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5725
		, "rbx", "rcx", "rdx", "rsi", "rdi"
5726
		, "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15"
A
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5727 5728
#else
		, "ebx", "ecx", "edx", "esi", "edi"
5729 5730
#endif
		);
A
Avi Kivity 已提交
5731

5732 5733 5734 5735 5736 5737 5738 5739 5740 5741 5742 5743
	/* Eliminate branch target predictions from guest mode */
	vmexit_fill_RSB();

#ifdef CONFIG_X86_64
	wrmsrl(MSR_GS_BASE, svm->host.gs_base);
#else
	loadsegment(fs, svm->host.fs);
#ifndef CONFIG_X86_32_LAZY_GS
	loadsegment(gs, svm->host.gs);
#endif
#endif

5744 5745 5746 5747 5748 5749 5750 5751 5752 5753 5754 5755 5756 5757 5758
	/*
	 * We do not use IBRS in the kernel. If this vCPU has used the
	 * SPEC_CTRL MSR it may have left it on; save the value and
	 * turn it off. This is much more efficient than blindly adding
	 * it to the atomic save/restore list. Especially as the former
	 * (Saving guest MSRs on vmexit) doesn't even exist in KVM.
	 *
	 * For non-nested case:
	 * If the L01 MSR bitmap does not intercept the MSR, then we need to
	 * save it.
	 *
	 * For nested case:
	 * If the L02 MSR bitmap does not intercept the MSR, then we need to
	 * save it.
	 */
5759
	if (unlikely(!msr_write_intercepted(vcpu, MSR_IA32_SPEC_CTRL)))
5760
		svm->spec_ctrl = native_read_msr(MSR_IA32_SPEC_CTRL);
5761

A
Avi Kivity 已提交
5762 5763
	reload_tss(vcpu);

5764 5765
	local_irq_disable();

5766 5767
	x86_spec_ctrl_restore_host(svm->spec_ctrl, svm->virt_spec_ctrl);

5768 5769 5770 5771 5772
	vcpu->arch.cr2 = svm->vmcb->save.cr2;
	vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax;
	vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp;
	vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip;

5773
	if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
5774
		kvm_before_interrupt(&svm->vcpu);
5775

5776
	kvm_put_guest_xcr0(vcpu);
5777 5778 5779 5780 5781
	stgi();

	/* Any pending NMI will happen here */

	if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
5782
		kvm_after_interrupt(&svm->vcpu);
5783

5784 5785
	sync_cr8_to_lapic(vcpu);

5786
	svm->next_rip = 0;
5787

5788 5789
	svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;

G
Gleb Natapov 已提交
5790 5791
	/* if exit due to PF check for async PF */
	if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR)
5792
		svm->vcpu.arch.apf.host_apf_reason = kvm_read_and_reset_pf_reason();
G
Gleb Natapov 已提交
5793

A
Avi Kivity 已提交
5794 5795 5796 5797
	if (npt_enabled) {
		vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR);
		vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR);
	}
5798 5799 5800 5801 5802 5803 5804 5805

	/*
	 * We need to handle MC intercepts here before the vcpu has a chance to
	 * change the physical cpu
	 */
	if (unlikely(svm->vmcb->control.exit_code ==
		     SVM_EXIT_EXCP_BASE + MC_VECTOR))
		svm_handle_mce(svm);
5806 5807

	mark_all_clean(svm->vmcb);
A
Avi Kivity 已提交
5808
}
5809
STACK_FRAME_NON_STANDARD(svm_vcpu_run);
A
Avi Kivity 已提交
5810 5811 5812

static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
{
5813 5814
	struct vcpu_svm *svm = to_svm(vcpu);

5815
	svm->vmcb->save.cr3 = __sme_set(root);
5816
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
5817 5818
}

5819 5820 5821 5822
static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root)
{
	struct vcpu_svm *svm = to_svm(vcpu);

5823
	svm->vmcb->control.nested_cr3 = __sme_set(root);
5824
	mark_dirty(svm->vmcb, VMCB_NPT);
5825 5826

	/* Also sync guest cr3 here in case we live migrate */
5827
	svm->vmcb->save.cr3 = kvm_read_cr3(vcpu);
5828
	mark_dirty(svm->vmcb, VMCB_CR);
5829 5830
}

A
Avi Kivity 已提交
5831 5832
static int is_disabled(void)
{
5833 5834 5835 5836 5837 5838
	u64 vm_cr;

	rdmsrl(MSR_VM_CR, vm_cr);
	if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE))
		return 1;

A
Avi Kivity 已提交
5839 5840 5841
	return 0;
}

I
Ingo Molnar 已提交
5842 5843 5844 5845 5846 5847 5848 5849 5850 5851 5852
static void
svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
{
	/*
	 * Patch in the VMMCALL instruction:
	 */
	hypercall[0] = 0x0f;
	hypercall[1] = 0x01;
	hypercall[2] = 0xd9;
}

5853
static int __init svm_check_processor_compat(void)
Y
Yang, Sheng 已提交
5854
{
5855
	return 0;
Y
Yang, Sheng 已提交
5856 5857
}

5858 5859 5860 5861 5862
static bool svm_cpu_has_accelerated_tpr(void)
{
	return false;
}

5863
static bool svm_has_emulated_msr(int index)
5864
{
5865 5866
	switch (index) {
	case MSR_IA32_MCG_EXT_CTL:
5867
	case MSR_IA32_VMX_BASIC ... MSR_IA32_VMX_VMFUNC:
5868 5869 5870 5871 5872
		return false;
	default:
		break;
	}

5873 5874 5875
	return true;
}

5876 5877 5878 5879 5880
static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
{
	return 0;
}

5881 5882
static void svm_cpuid_update(struct kvm_vcpu *vcpu)
{
5883 5884 5885
	struct vcpu_svm *svm = to_svm(vcpu);

	/* Update nrips enabled cache */
5886
	svm->nrips_enabled = !!guest_cpuid_has(&svm->vcpu, X86_FEATURE_NRIPS);
5887 5888 5889 5890

	if (!kvm_vcpu_apicv_active(vcpu))
		return;

5891
	guest_cpuid_clear(vcpu, X86_FEATURE_X2APIC);
5892 5893
}

5894 5895
#define F(x) bit(X86_FEATURE_##x)

5896 5897
static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
{
5898
	switch (func) {
5899 5900 5901 5902
	case 0x1:
		if (avic)
			entry->ecx &= ~bit(X86_FEATURE_X2APIC);
		break;
5903 5904 5905 5906
	case 0x80000001:
		if (nested)
			entry->ecx |= (1 << 2); /* Set SVM bit */
		break;
5907 5908 5909 5910 5911
	case 0x80000008:
		if (boot_cpu_has(X86_FEATURE_LS_CFG_SSBD) ||
		     boot_cpu_has(X86_FEATURE_AMD_SSBD))
			entry->ebx |= F(VIRT_SSBD);
		break;
5912 5913 5914 5915 5916
	case 0x8000000A:
		entry->eax = 1; /* SVM revision 1 */
		entry->ebx = 8; /* Lets support 8 ASIDs in case we add proper
				   ASID emulation to nested SVM */
		entry->ecx = 0; /* Reserved */
5917 5918 5919 5920
		entry->edx = 0; /* Per default do not support any
				   additional features */

		/* Support next_rip if host supports it */
5921
		if (boot_cpu_has(X86_FEATURE_NRIPS))
5922
			entry->edx |= F(NRIPS);
5923

5924 5925
		/* Support NPT for the guest if enabled */
		if (npt_enabled)
5926
			entry->edx |= F(NPT);
5927

5928
		break;
5929 5930 5931 5932 5933 5934
	case 0x8000001F:
		/* Support memory encryption cpuid if host supports it */
		if (boot_cpu_has(X86_FEATURE_SEV))
			cpuid(0x8000001f, &entry->eax, &entry->ebx,
				&entry->ecx, &entry->edx);

5935
	}
5936 5937
}

5938
static int svm_get_lpage_level(void)
5939
{
5940
	return PT_PDPE_LEVEL;
5941 5942
}

5943 5944
static bool svm_rdtscp_supported(void)
{
P
Paolo Bonzini 已提交
5945
	return boot_cpu_has(X86_FEATURE_RDTSCP);
5946 5947
}

5948 5949 5950 5951 5952
static bool svm_invpcid_supported(void)
{
	return false;
}

5953 5954 5955 5956 5957
static bool svm_mpx_supported(void)
{
	return false;
}

5958 5959 5960 5961 5962
static bool svm_xsaves_supported(void)
{
	return false;
}

5963 5964 5965 5966 5967
static bool svm_umip_emulated(void)
{
	return false;
}

5968 5969 5970 5971 5972
static bool svm_pt_supported(void)
{
	return false;
}

5973 5974 5975 5976 5977
static bool svm_has_wbinvd_exit(void)
{
	return true;
}

5978
#define PRE_EX(exit)  { .exit_code = (exit), \
5979
			.stage = X86_ICPT_PRE_EXCEPT, }
5980
#define POST_EX(exit) { .exit_code = (exit), \
5981
			.stage = X86_ICPT_POST_EXCEPT, }
5982
#define POST_MEM(exit) { .exit_code = (exit), \
5983
			.stage = X86_ICPT_POST_MEMACCESS, }
5984

5985
static const struct __x86_intercept {
5986 5987 5988 5989 5990 5991 5992 5993
	u32 exit_code;
	enum x86_intercept_stage stage;
} x86_intercept_map[] = {
	[x86_intercept_cr_read]		= POST_EX(SVM_EXIT_READ_CR0),
	[x86_intercept_cr_write]	= POST_EX(SVM_EXIT_WRITE_CR0),
	[x86_intercept_clts]		= POST_EX(SVM_EXIT_WRITE_CR0),
	[x86_intercept_lmsw]		= POST_EX(SVM_EXIT_WRITE_CR0),
	[x86_intercept_smsw]		= POST_EX(SVM_EXIT_READ_CR0),
5994 5995
	[x86_intercept_dr_read]		= POST_EX(SVM_EXIT_READ_DR0),
	[x86_intercept_dr_write]	= POST_EX(SVM_EXIT_WRITE_DR0),
5996 5997 5998 5999 6000 6001 6002 6003
	[x86_intercept_sldt]		= POST_EX(SVM_EXIT_LDTR_READ),
	[x86_intercept_str]		= POST_EX(SVM_EXIT_TR_READ),
	[x86_intercept_lldt]		= POST_EX(SVM_EXIT_LDTR_WRITE),
	[x86_intercept_ltr]		= POST_EX(SVM_EXIT_TR_WRITE),
	[x86_intercept_sgdt]		= POST_EX(SVM_EXIT_GDTR_READ),
	[x86_intercept_sidt]		= POST_EX(SVM_EXIT_IDTR_READ),
	[x86_intercept_lgdt]		= POST_EX(SVM_EXIT_GDTR_WRITE),
	[x86_intercept_lidt]		= POST_EX(SVM_EXIT_IDTR_WRITE),
6004 6005 6006 6007 6008 6009 6010 6011
	[x86_intercept_vmrun]		= POST_EX(SVM_EXIT_VMRUN),
	[x86_intercept_vmmcall]		= POST_EX(SVM_EXIT_VMMCALL),
	[x86_intercept_vmload]		= POST_EX(SVM_EXIT_VMLOAD),
	[x86_intercept_vmsave]		= POST_EX(SVM_EXIT_VMSAVE),
	[x86_intercept_stgi]		= POST_EX(SVM_EXIT_STGI),
	[x86_intercept_clgi]		= POST_EX(SVM_EXIT_CLGI),
	[x86_intercept_skinit]		= POST_EX(SVM_EXIT_SKINIT),
	[x86_intercept_invlpga]		= POST_EX(SVM_EXIT_INVLPGA),
6012 6013 6014
	[x86_intercept_rdtscp]		= POST_EX(SVM_EXIT_RDTSCP),
	[x86_intercept_monitor]		= POST_MEM(SVM_EXIT_MONITOR),
	[x86_intercept_mwait]		= POST_EX(SVM_EXIT_MWAIT),
6015 6016 6017 6018 6019 6020 6021 6022 6023
	[x86_intercept_invlpg]		= POST_EX(SVM_EXIT_INVLPG),
	[x86_intercept_invd]		= POST_EX(SVM_EXIT_INVD),
	[x86_intercept_wbinvd]		= POST_EX(SVM_EXIT_WBINVD),
	[x86_intercept_wrmsr]		= POST_EX(SVM_EXIT_MSR),
	[x86_intercept_rdtsc]		= POST_EX(SVM_EXIT_RDTSC),
	[x86_intercept_rdmsr]		= POST_EX(SVM_EXIT_MSR),
	[x86_intercept_rdpmc]		= POST_EX(SVM_EXIT_RDPMC),
	[x86_intercept_cpuid]		= PRE_EX(SVM_EXIT_CPUID),
	[x86_intercept_rsm]		= PRE_EX(SVM_EXIT_RSM),
6024 6025 6026 6027 6028 6029 6030
	[x86_intercept_pause]		= PRE_EX(SVM_EXIT_PAUSE),
	[x86_intercept_pushf]		= PRE_EX(SVM_EXIT_PUSHF),
	[x86_intercept_popf]		= PRE_EX(SVM_EXIT_POPF),
	[x86_intercept_intn]		= PRE_EX(SVM_EXIT_SWINT),
	[x86_intercept_iret]		= PRE_EX(SVM_EXIT_IRET),
	[x86_intercept_icebp]		= PRE_EX(SVM_EXIT_ICEBP),
	[x86_intercept_hlt]		= POST_EX(SVM_EXIT_HLT),
6031 6032 6033 6034
	[x86_intercept_in]		= POST_EX(SVM_EXIT_IOIO),
	[x86_intercept_ins]		= POST_EX(SVM_EXIT_IOIO),
	[x86_intercept_out]		= POST_EX(SVM_EXIT_IOIO),
	[x86_intercept_outs]		= POST_EX(SVM_EXIT_IOIO),
6035
	[x86_intercept_xsetbv]		= PRE_EX(SVM_EXIT_XSETBV),
6036 6037
};

6038
#undef PRE_EX
6039
#undef POST_EX
6040
#undef POST_MEM
6041

6042 6043 6044 6045
static int svm_check_intercept(struct kvm_vcpu *vcpu,
			       struct x86_instruction_info *info,
			       enum x86_intercept_stage stage)
{
6046 6047 6048 6049 6050 6051 6052 6053 6054 6055
	struct vcpu_svm *svm = to_svm(vcpu);
	int vmexit, ret = X86EMUL_CONTINUE;
	struct __x86_intercept icpt_info;
	struct vmcb *vmcb = svm->vmcb;

	if (info->intercept >= ARRAY_SIZE(x86_intercept_map))
		goto out;

	icpt_info = x86_intercept_map[info->intercept];

6056
	if (stage != icpt_info.stage)
6057 6058 6059 6060 6061 6062 6063 6064 6065 6066 6067 6068 6069 6070
		goto out;

	switch (icpt_info.exit_code) {
	case SVM_EXIT_READ_CR0:
		if (info->intercept == x86_intercept_cr_read)
			icpt_info.exit_code += info->modrm_reg;
		break;
	case SVM_EXIT_WRITE_CR0: {
		unsigned long cr0, val;
		u64 intercept;

		if (info->intercept == x86_intercept_cr_write)
			icpt_info.exit_code += info->modrm_reg;

6071 6072
		if (icpt_info.exit_code != SVM_EXIT_WRITE_CR0 ||
		    info->intercept == x86_intercept_clts)
6073 6074 6075 6076 6077 6078 6079 6080 6081 6082 6083 6084 6085 6086 6087 6088 6089 6090 6091 6092 6093 6094 6095
			break;

		intercept = svm->nested.intercept;

		if (!(intercept & (1ULL << INTERCEPT_SELECTIVE_CR0)))
			break;

		cr0 = vcpu->arch.cr0 & ~SVM_CR0_SELECTIVE_MASK;
		val = info->src_val  & ~SVM_CR0_SELECTIVE_MASK;

		if (info->intercept == x86_intercept_lmsw) {
			cr0 &= 0xfUL;
			val &= 0xfUL;
			/* lmsw can't clear PE - catch this here */
			if (cr0 & X86_CR0_PE)
				val |= X86_CR0_PE;
		}

		if (cr0 ^ val)
			icpt_info.exit_code = SVM_EXIT_CR0_SEL_WRITE;

		break;
	}
6096 6097 6098 6099
	case SVM_EXIT_READ_DR0:
	case SVM_EXIT_WRITE_DR0:
		icpt_info.exit_code += info->modrm_reg;
		break;
6100 6101 6102 6103 6104 6105
	case SVM_EXIT_MSR:
		if (info->intercept == x86_intercept_wrmsr)
			vmcb->control.exit_info_1 = 1;
		else
			vmcb->control.exit_info_1 = 0;
		break;
6106 6107 6108 6109 6110 6111 6112
	case SVM_EXIT_PAUSE:
		/*
		 * We get this for NOP only, but pause
		 * is rep not, check this here
		 */
		if (info->rep_prefix != REPE_PREFIX)
			goto out;
6113
		break;
6114 6115 6116 6117 6118 6119
	case SVM_EXIT_IOIO: {
		u64 exit_info;
		u32 bytes;

		if (info->intercept == x86_intercept_in ||
		    info->intercept == x86_intercept_ins) {
6120 6121
			exit_info = ((info->src_val & 0xffff) << 16) |
				SVM_IOIO_TYPE_MASK;
6122
			bytes = info->dst_bytes;
6123
		} else {
6124
			exit_info = (info->dst_val & 0xffff) << 16;
6125
			bytes = info->src_bytes;
6126 6127 6128 6129 6130 6131 6132 6133 6134 6135 6136 6137 6138 6139 6140 6141 6142 6143 6144 6145
		}

		if (info->intercept == x86_intercept_outs ||
		    info->intercept == x86_intercept_ins)
			exit_info |= SVM_IOIO_STR_MASK;

		if (info->rep_prefix)
			exit_info |= SVM_IOIO_REP_MASK;

		bytes = min(bytes, 4u);

		exit_info |= bytes << SVM_IOIO_SIZE_SHIFT;

		exit_info |= (u32)info->ad_bytes << (SVM_IOIO_ASIZE_SHIFT - 1);

		vmcb->control.exit_info_1 = exit_info;
		vmcb->control.exit_info_2 = info->next_rip;

		break;
	}
6146 6147 6148 6149
	default:
		break;
	}

6150 6151 6152
	/* TODO: Advertise NRIPS to guest hypervisor unconditionally */
	if (static_cpu_has(X86_FEATURE_NRIPS))
		vmcb->control.next_rip  = info->next_rip;
6153 6154 6155 6156 6157 6158 6159 6160
	vmcb->control.exit_code = icpt_info.exit_code;
	vmexit = nested_svm_exit_handled(svm);

	ret = (vmexit == NESTED_EXIT_DONE) ? X86EMUL_INTERCEPTED
					   : X86EMUL_CONTINUE;

out:
	return ret;
6161 6162
}

6163
static void svm_handle_exit_irqoff(struct kvm_vcpu *vcpu)
6164
{
6165

6166 6167
}

6168 6169
static void svm_sched_in(struct kvm_vcpu *vcpu, int cpu)
{
6170 6171
	if (pause_filter_thresh)
		shrink_ple_window(vcpu);
6172 6173
}

6174 6175 6176 6177
static inline void avic_post_state_restore(struct kvm_vcpu *vcpu)
{
	if (avic_handle_apic_id_update(vcpu) != 0)
		return;
6178
	avic_handle_dfr_update(vcpu);
6179 6180 6181
	avic_handle_ldr_update(vcpu);
}

6182 6183 6184 6185 6186 6187
static void svm_setup_mce(struct kvm_vcpu *vcpu)
{
	/* [63:9] are reserved. */
	vcpu->arch.mcg_cap &= 0x1ff;
}

6188 6189
static int svm_smi_allowed(struct kvm_vcpu *vcpu)
{
6190 6191 6192 6193 6194 6195 6196 6197 6198 6199 6200 6201 6202 6203
	struct vcpu_svm *svm = to_svm(vcpu);

	/* Per APM Vol.2 15.22.2 "Response to SMI" */
	if (!gif_set(svm))
		return 0;

	if (is_guest_mode(&svm->vcpu) &&
	    svm->nested.intercept & (1ULL << INTERCEPT_SMI)) {
		/* TODO: Might need to set exit_info_1 and exit_info_2 here */
		svm->vmcb->control.exit_code = SVM_EXIT_SMI;
		svm->nested.exit_required = true;
		return 0;
	}

6204 6205 6206
	return 1;
}

6207 6208
static int svm_pre_enter_smm(struct kvm_vcpu *vcpu, char *smstate)
{
6209 6210 6211 6212 6213 6214 6215 6216 6217 6218 6219 6220 6221 6222 6223 6224 6225
	struct vcpu_svm *svm = to_svm(vcpu);
	int ret;

	if (is_guest_mode(vcpu)) {
		/* FED8h - SVM Guest */
		put_smstate(u64, smstate, 0x7ed8, 1);
		/* FEE0h - SVM Guest VMCB Physical Address */
		put_smstate(u64, smstate, 0x7ee0, svm->nested.vmcb);

		svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX];
		svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP];
		svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP];

		ret = nested_svm_vmexit(svm);
		if (ret)
			return ret;
	}
6226 6227 6228
	return 0;
}

6229
static int svm_pre_leave_smm(struct kvm_vcpu *vcpu, const char *smstate)
6230
{
6231 6232
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *nested_vmcb;
6233
	struct kvm_host_map map;
6234 6235
	u64 guest;
	u64 vmcb;
6236

6237 6238
	guest = GET_SMSTATE(u64, smstate, 0x7ed8);
	vmcb = GET_SMSTATE(u64, smstate, 0x7ee0);
6239

6240
	if (guest) {
6241
		if (kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(vmcb), &map) == -EINVAL)
6242
			return 1;
6243 6244
		nested_vmcb = map.hva;
		enter_svm_guest_mode(svm, vmcb, nested_vmcb, &map);
6245
	}
6246
	return 0;
6247 6248
}

6249 6250 6251 6252 6253 6254 6255 6256 6257 6258 6259 6260 6261
static int enable_smi_window(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	if (!gif_set(svm)) {
		if (vgif_enabled(svm))
			set_intercept(svm, INTERCEPT_STGI);
		/* STGI will cause a vm exit */
		return 1;
	}
	return 0;
}

B
Brijesh Singh 已提交
6262 6263 6264 6265 6266 6267 6268 6269 6270 6271 6272 6273 6274 6275 6276 6277 6278
static int sev_asid_new(void)
{
	int pos;

	/*
	 * SEV-enabled guest must use asid from min_sev_asid to max_sev_asid.
	 */
	pos = find_next_zero_bit(sev_asid_bitmap, max_sev_asid, min_sev_asid - 1);
	if (pos >= max_sev_asid)
		return -EBUSY;

	set_bit(pos, sev_asid_bitmap);
	return pos + 1;
}

static int sev_guest_init(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6279
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
B
Brijesh Singh 已提交
6280 6281 6282
	int asid, ret;

	ret = -EBUSY;
6283 6284 6285
	if (unlikely(sev->active))
		return ret;

B
Brijesh Singh 已提交
6286 6287 6288 6289 6290 6291 6292 6293 6294 6295
	asid = sev_asid_new();
	if (asid < 0)
		return ret;

	ret = sev_platform_init(&argp->error);
	if (ret)
		goto e_free;

	sev->active = true;
	sev->asid = asid;
6296
	INIT_LIST_HEAD(&sev->regions_list);
B
Brijesh Singh 已提交
6297 6298 6299 6300 6301 6302 6303 6304

	return 0;

e_free:
	__sev_asid_free(asid);
	return ret;
}

6305 6306 6307 6308 6309 6310 6311 6312 6313 6314 6315 6316
static int sev_bind_asid(struct kvm *kvm, unsigned int handle, int *error)
{
	struct sev_data_activate *data;
	int asid = sev_get_asid(kvm);
	int ret;

	wbinvd_on_all_cpus();

	ret = sev_guest_df_flush(error);
	if (ret)
		return ret;

6317
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6318 6319 6320 6321 6322 6323 6324 6325 6326 6327 6328 6329
	if (!data)
		return -ENOMEM;

	/* activate ASID on the given handle */
	data->handle = handle;
	data->asid   = asid;
	ret = sev_guest_activate(data, error);
	kfree(data);

	return ret;
}

6330
static int __sev_issue_cmd(int fd, int id, void *data, int *error)
6331 6332 6333 6334 6335 6336 6337 6338 6339 6340 6341 6342 6343 6344
{
	struct fd f;
	int ret;

	f = fdget(fd);
	if (!f.file)
		return -EBADF;

	ret = sev_issue_cmd_external_user(f.file, id, data, error);

	fdput(f);
	return ret;
}

6345 6346
static int sev_issue_cmd(struct kvm *kvm, int id, void *data, int *error)
{
6347
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6348 6349 6350 6351

	return __sev_issue_cmd(sev->fd, id, data, error);
}

6352 6353
static int sev_launch_start(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6354
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6355 6356 6357 6358 6359 6360 6361 6362 6363 6364 6365 6366
	struct sev_data_launch_start *start;
	struct kvm_sev_launch_start params;
	void *dh_blob, *session_blob;
	int *error = &argp->error;
	int ret;

	if (!sev_guest(kvm))
		return -ENOTTY;

	if (copy_from_user(&params, (void __user *)(uintptr_t)argp->data, sizeof(params)))
		return -EFAULT;

6367
	start = kzalloc(sizeof(*start), GFP_KERNEL_ACCOUNT);
6368 6369 6370 6371 6372 6373 6374 6375 6376 6377 6378 6379 6380 6381 6382 6383 6384 6385 6386 6387 6388 6389 6390 6391 6392 6393 6394 6395 6396 6397 6398
	if (!start)
		return -ENOMEM;

	dh_blob = NULL;
	if (params.dh_uaddr) {
		dh_blob = psp_copy_user_blob(params.dh_uaddr, params.dh_len);
		if (IS_ERR(dh_blob)) {
			ret = PTR_ERR(dh_blob);
			goto e_free;
		}

		start->dh_cert_address = __sme_set(__pa(dh_blob));
		start->dh_cert_len = params.dh_len;
	}

	session_blob = NULL;
	if (params.session_uaddr) {
		session_blob = psp_copy_user_blob(params.session_uaddr, params.session_len);
		if (IS_ERR(session_blob)) {
			ret = PTR_ERR(session_blob);
			goto e_free_dh;
		}

		start->session_address = __sme_set(__pa(session_blob));
		start->session_len = params.session_len;
	}

	start->handle = params.handle;
	start->policy = params.policy;

	/* create memory encryption context */
6399
	ret = __sev_issue_cmd(argp->sev_fd, SEV_CMD_LAUNCH_START, start, error);
6400 6401 6402 6403 6404 6405 6406 6407 6408 6409 6410 6411 6412 6413 6414 6415 6416 6417 6418 6419 6420 6421 6422 6423 6424 6425 6426 6427
	if (ret)
		goto e_free_session;

	/* Bind ASID to this guest */
	ret = sev_bind_asid(kvm, start->handle, error);
	if (ret)
		goto e_free_session;

	/* return handle to userspace */
	params.handle = start->handle;
	if (copy_to_user((void __user *)(uintptr_t)argp->data, &params, sizeof(params))) {
		sev_unbind_asid(kvm, start->handle);
		ret = -EFAULT;
		goto e_free_session;
	}

	sev->handle = start->handle;
	sev->fd = argp->sev_fd;

e_free_session:
	kfree(session_blob);
e_free_dh:
	kfree(dh_blob);
e_free:
	kfree(start);
	return ret;
}

6428 6429
static unsigned long get_num_contig_pages(unsigned long idx,
				struct page **inpages, unsigned long npages)
6430 6431
{
	unsigned long paddr, next_paddr;
6432
	unsigned long i = idx + 1, pages = 1;
6433 6434 6435 6436 6437 6438 6439 6440 6441 6442 6443 6444 6445 6446 6447 6448 6449 6450

	/* find the number of contiguous pages starting from idx */
	paddr = __sme_page_pa(inpages[idx]);
	while (i < npages) {
		next_paddr = __sme_page_pa(inpages[i++]);
		if ((paddr + PAGE_SIZE) == next_paddr) {
			pages++;
			paddr = next_paddr;
			continue;
		}
		break;
	}

	return pages;
}

static int sev_launch_update_data(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6451
	unsigned long vaddr, vaddr_end, next_vaddr, npages, pages, size, i;
6452
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6453 6454 6455
	struct kvm_sev_launch_update_data params;
	struct sev_data_launch_update_data *data;
	struct page **inpages;
6456
	int ret;
6457 6458 6459 6460 6461 6462 6463

	if (!sev_guest(kvm))
		return -ENOTTY;

	if (copy_from_user(&params, (void __user *)(uintptr_t)argp->data, sizeof(params)))
		return -EFAULT;

6464
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6465 6466 6467 6468 6469 6470 6471 6472 6473 6474 6475 6476 6477 6478 6479 6480 6481 6482 6483 6484 6485 6486 6487 6488 6489 6490 6491 6492 6493 6494 6495 6496 6497 6498 6499 6500 6501 6502 6503 6504 6505 6506 6507 6508 6509 6510 6511 6512 6513 6514 6515 6516 6517 6518 6519 6520 6521 6522 6523 6524
	if (!data)
		return -ENOMEM;

	vaddr = params.uaddr;
	size = params.len;
	vaddr_end = vaddr + size;

	/* Lock the user memory. */
	inpages = sev_pin_memory(kvm, vaddr, size, &npages, 1);
	if (!inpages) {
		ret = -ENOMEM;
		goto e_free;
	}

	/*
	 * The LAUNCH_UPDATE command will perform in-place encryption of the
	 * memory content (i.e it will write the same memory region with C=1).
	 * It's possible that the cache may contain the data with C=0, i.e.,
	 * unencrypted so invalidate it first.
	 */
	sev_clflush_pages(inpages, npages);

	for (i = 0; vaddr < vaddr_end; vaddr = next_vaddr, i += pages) {
		int offset, len;

		/*
		 * If the user buffer is not page-aligned, calculate the offset
		 * within the page.
		 */
		offset = vaddr & (PAGE_SIZE - 1);

		/* Calculate the number of pages that can be encrypted in one go. */
		pages = get_num_contig_pages(i, inpages, npages);

		len = min_t(size_t, ((pages * PAGE_SIZE) - offset), size);

		data->handle = sev->handle;
		data->len = len;
		data->address = __sme_page_pa(inpages[i]) + offset;
		ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_UPDATE_DATA, data, &argp->error);
		if (ret)
			goto e_unpin;

		size -= len;
		next_vaddr = vaddr + len;
	}

e_unpin:
	/* content of memory is updated, mark pages dirty */
	for (i = 0; i < npages; i++) {
		set_page_dirty_lock(inpages[i]);
		mark_page_accessed(inpages[i]);
	}
	/* unlock the user pages */
	sev_unpin_memory(kvm, inpages, npages);
e_free:
	kfree(data);
	return ret;
}

6525 6526
static int sev_launch_measure(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6527
	void __user *measure = (void __user *)(uintptr_t)argp->data;
6528
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6529 6530
	struct sev_data_launch_measure *data;
	struct kvm_sev_launch_measure params;
6531
	void __user *p = NULL;
6532 6533 6534 6535 6536 6537
	void *blob = NULL;
	int ret;

	if (!sev_guest(kvm))
		return -ENOTTY;

6538
	if (copy_from_user(&params, measure, sizeof(params)))
6539 6540
		return -EFAULT;

6541
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6542 6543 6544 6545 6546 6547 6548
	if (!data)
		return -ENOMEM;

	/* User wants to query the blob length */
	if (!params.len)
		goto cmd;

6549 6550
	p = (void __user *)(uintptr_t)params.uaddr;
	if (p) {
6551 6552 6553 6554 6555 6556 6557 6558 6559 6560 6561 6562 6563 6564 6565 6566 6567 6568 6569 6570 6571 6572 6573 6574 6575 6576 6577 6578
		if (params.len > SEV_FW_BLOB_MAX_SIZE) {
			ret = -EINVAL;
			goto e_free;
		}

		ret = -ENOMEM;
		blob = kmalloc(params.len, GFP_KERNEL);
		if (!blob)
			goto e_free;

		data->address = __psp_pa(blob);
		data->len = params.len;
	}

cmd:
	data->handle = sev->handle;
	ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_MEASURE, data, &argp->error);

	/*
	 * If we query the session length, FW responded with expected data.
	 */
	if (!params.len)
		goto done;

	if (ret)
		goto e_free_blob;

	if (blob) {
6579
		if (copy_to_user(p, blob, params.len))
6580 6581 6582 6583 6584
			ret = -EFAULT;
	}

done:
	params.len = data->len;
6585
	if (copy_to_user(measure, &params, sizeof(params)))
6586 6587 6588 6589 6590 6591 6592 6593
		ret = -EFAULT;
e_free_blob:
	kfree(blob);
e_free:
	kfree(data);
	return ret;
}

6594 6595
static int sev_launch_finish(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6596
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6597 6598 6599 6600 6601 6602
	struct sev_data_launch_finish *data;
	int ret;

	if (!sev_guest(kvm))
		return -ENOTTY;

6603
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6604 6605 6606 6607 6608 6609 6610 6611 6612 6613
	if (!data)
		return -ENOMEM;

	data->handle = sev->handle;
	ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_FINISH, data, &argp->error);

	kfree(data);
	return ret;
}

6614 6615
static int sev_guest_status(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6616
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6617 6618 6619 6620 6621 6622 6623
	struct kvm_sev_guest_status params;
	struct sev_data_guest_status *data;
	int ret;

	if (!sev_guest(kvm))
		return -ENOTTY;

6624
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6625 6626 6627 6628 6629 6630 6631 6632 6633 6634 6635 6636 6637 6638 6639 6640 6641 6642 6643
	if (!data)
		return -ENOMEM;

	data->handle = sev->handle;
	ret = sev_issue_cmd(kvm, SEV_CMD_GUEST_STATUS, data, &argp->error);
	if (ret)
		goto e_free;

	params.policy = data->policy;
	params.state = data->state;
	params.handle = data->handle;

	if (copy_to_user((void __user *)(uintptr_t)argp->data, &params, sizeof(params)))
		ret = -EFAULT;
e_free:
	kfree(data);
	return ret;
}

6644 6645 6646 6647
static int __sev_issue_dbg_cmd(struct kvm *kvm, unsigned long src,
			       unsigned long dst, int size,
			       int *error, bool enc)
{
6648
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6649 6650 6651
	struct sev_data_dbg *data;
	int ret;

6652
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6653 6654 6655 6656 6657 6658 6659 6660 6661 6662 6663 6664 6665 6666 6667 6668 6669 6670 6671 6672 6673 6674 6675 6676 6677 6678 6679 6680 6681 6682 6683 6684 6685 6686 6687 6688 6689 6690 6691 6692 6693 6694 6695 6696 6697 6698 6699 6700 6701 6702 6703 6704 6705 6706 6707 6708 6709 6710 6711 6712 6713 6714 6715 6716 6717 6718 6719 6720
	if (!data)
		return -ENOMEM;

	data->handle = sev->handle;
	data->dst_addr = dst;
	data->src_addr = src;
	data->len = size;

	ret = sev_issue_cmd(kvm,
			    enc ? SEV_CMD_DBG_ENCRYPT : SEV_CMD_DBG_DECRYPT,
			    data, error);
	kfree(data);
	return ret;
}

static int __sev_dbg_decrypt(struct kvm *kvm, unsigned long src_paddr,
			     unsigned long dst_paddr, int sz, int *err)
{
	int offset;

	/*
	 * Its safe to read more than we are asked, caller should ensure that
	 * destination has enough space.
	 */
	src_paddr = round_down(src_paddr, 16);
	offset = src_paddr & 15;
	sz = round_up(sz + offset, 16);

	return __sev_issue_dbg_cmd(kvm, src_paddr, dst_paddr, sz, err, false);
}

static int __sev_dbg_decrypt_user(struct kvm *kvm, unsigned long paddr,
				  unsigned long __user dst_uaddr,
				  unsigned long dst_paddr,
				  int size, int *err)
{
	struct page *tpage = NULL;
	int ret, offset;

	/* if inputs are not 16-byte then use intermediate buffer */
	if (!IS_ALIGNED(dst_paddr, 16) ||
	    !IS_ALIGNED(paddr,     16) ||
	    !IS_ALIGNED(size,      16)) {
		tpage = (void *)alloc_page(GFP_KERNEL);
		if (!tpage)
			return -ENOMEM;

		dst_paddr = __sme_page_pa(tpage);
	}

	ret = __sev_dbg_decrypt(kvm, paddr, dst_paddr, size, err);
	if (ret)
		goto e_free;

	if (tpage) {
		offset = paddr & 15;
		if (copy_to_user((void __user *)(uintptr_t)dst_uaddr,
				 page_address(tpage) + offset, size))
			ret = -EFAULT;
	}

e_free:
	if (tpage)
		__free_page(tpage);

	return ret;
}

6721 6722 6723 6724 6725 6726 6727 6728 6729 6730 6731 6732 6733 6734 6735 6736 6737 6738 6739 6740 6741 6742 6743 6744 6745 6746 6747 6748 6749 6750 6751 6752 6753 6754 6755 6756 6757 6758 6759 6760 6761 6762 6763 6764 6765 6766 6767 6768 6769 6770 6771 6772 6773 6774 6775 6776 6777 6778 6779 6780 6781 6782 6783 6784 6785 6786 6787 6788 6789 6790 6791 6792 6793 6794 6795 6796 6797
static int __sev_dbg_encrypt_user(struct kvm *kvm, unsigned long paddr,
				  unsigned long __user vaddr,
				  unsigned long dst_paddr,
				  unsigned long __user dst_vaddr,
				  int size, int *error)
{
	struct page *src_tpage = NULL;
	struct page *dst_tpage = NULL;
	int ret, len = size;

	/* If source buffer is not aligned then use an intermediate buffer */
	if (!IS_ALIGNED(vaddr, 16)) {
		src_tpage = alloc_page(GFP_KERNEL);
		if (!src_tpage)
			return -ENOMEM;

		if (copy_from_user(page_address(src_tpage),
				(void __user *)(uintptr_t)vaddr, size)) {
			__free_page(src_tpage);
			return -EFAULT;
		}

		paddr = __sme_page_pa(src_tpage);
	}

	/*
	 *  If destination buffer or length is not aligned then do read-modify-write:
	 *   - decrypt destination in an intermediate buffer
	 *   - copy the source buffer in an intermediate buffer
	 *   - use the intermediate buffer as source buffer
	 */
	if (!IS_ALIGNED(dst_vaddr, 16) || !IS_ALIGNED(size, 16)) {
		int dst_offset;

		dst_tpage = alloc_page(GFP_KERNEL);
		if (!dst_tpage) {
			ret = -ENOMEM;
			goto e_free;
		}

		ret = __sev_dbg_decrypt(kvm, dst_paddr,
					__sme_page_pa(dst_tpage), size, error);
		if (ret)
			goto e_free;

		/*
		 *  If source is kernel buffer then use memcpy() otherwise
		 *  copy_from_user().
		 */
		dst_offset = dst_paddr & 15;

		if (src_tpage)
			memcpy(page_address(dst_tpage) + dst_offset,
			       page_address(src_tpage), size);
		else {
			if (copy_from_user(page_address(dst_tpage) + dst_offset,
					   (void __user *)(uintptr_t)vaddr, size)) {
				ret = -EFAULT;
				goto e_free;
			}
		}

		paddr = __sme_page_pa(dst_tpage);
		dst_paddr = round_down(dst_paddr, 16);
		len = round_up(size, 16);
	}

	ret = __sev_issue_dbg_cmd(kvm, paddr, dst_paddr, len, error, true);

e_free:
	if (src_tpage)
		__free_page(src_tpage);
	if (dst_tpage)
		__free_page(dst_tpage);
	return ret;
}

6798 6799 6800
static int sev_dbg_crypt(struct kvm *kvm, struct kvm_sev_cmd *argp, bool dec)
{
	unsigned long vaddr, vaddr_end, next_vaddr;
6801
	unsigned long dst_vaddr;
6802 6803 6804
	struct page **src_p, **dst_p;
	struct kvm_sev_dbg debug;
	unsigned long n;
6805 6806
	unsigned int size;
	int ret;
6807 6808 6809 6810 6811 6812 6813

	if (!sev_guest(kvm))
		return -ENOTTY;

	if (copy_from_user(&debug, (void __user *)(uintptr_t)argp->data, sizeof(debug)))
		return -EFAULT;

6814 6815 6816 6817 6818
	if (!debug.len || debug.src_uaddr + debug.len < debug.src_uaddr)
		return -EINVAL;
	if (!debug.dst_uaddr)
		return -EINVAL;

6819 6820 6821 6822 6823 6824 6825 6826 6827 6828 6829 6830 6831 6832 6833 6834 6835 6836 6837 6838 6839 6840 6841 6842 6843 6844 6845 6846 6847 6848 6849 6850 6851 6852 6853 6854
	vaddr = debug.src_uaddr;
	size = debug.len;
	vaddr_end = vaddr + size;
	dst_vaddr = debug.dst_uaddr;

	for (; vaddr < vaddr_end; vaddr = next_vaddr) {
		int len, s_off, d_off;

		/* lock userspace source and destination page */
		src_p = sev_pin_memory(kvm, vaddr & PAGE_MASK, PAGE_SIZE, &n, 0);
		if (!src_p)
			return -EFAULT;

		dst_p = sev_pin_memory(kvm, dst_vaddr & PAGE_MASK, PAGE_SIZE, &n, 1);
		if (!dst_p) {
			sev_unpin_memory(kvm, src_p, n);
			return -EFAULT;
		}

		/*
		 * The DBG_{DE,EN}CRYPT commands will perform {dec,en}cryption of the
		 * memory content (i.e it will write the same memory region with C=1).
		 * It's possible that the cache may contain the data with C=0, i.e.,
		 * unencrypted so invalidate it first.
		 */
		sev_clflush_pages(src_p, 1);
		sev_clflush_pages(dst_p, 1);

		/*
		 * Since user buffer may not be page aligned, calculate the
		 * offset within the page.
		 */
		s_off = vaddr & ~PAGE_MASK;
		d_off = dst_vaddr & ~PAGE_MASK;
		len = min_t(size_t, (PAGE_SIZE - s_off), size);

6855 6856 6857 6858 6859 6860 6861 6862 6863 6864 6865 6866 6867
		if (dec)
			ret = __sev_dbg_decrypt_user(kvm,
						     __sme_page_pa(src_p[0]) + s_off,
						     dst_vaddr,
						     __sme_page_pa(dst_p[0]) + d_off,
						     len, &argp->error);
		else
			ret = __sev_dbg_encrypt_user(kvm,
						     __sme_page_pa(src_p[0]) + s_off,
						     vaddr,
						     __sme_page_pa(dst_p[0]) + d_off,
						     dst_vaddr,
						     len, &argp->error);
6868

6869 6870
		sev_unpin_memory(kvm, src_p, n);
		sev_unpin_memory(kvm, dst_p, n);
6871 6872 6873 6874 6875 6876 6877 6878 6879 6880 6881 6882

		if (ret)
			goto err;

		next_vaddr = vaddr + len;
		dst_vaddr = dst_vaddr + len;
		size -= len;
	}
err:
	return ret;
}

6883 6884
static int sev_launch_secret(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6885
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6886 6887 6888 6889 6890
	struct sev_data_launch_secret *data;
	struct kvm_sev_launch_secret params;
	struct page **pages;
	void *blob, *hdr;
	unsigned long n;
6891
	int ret, offset;
6892 6893 6894 6895 6896 6897 6898 6899 6900 6901 6902 6903 6904 6905 6906 6907 6908 6909 6910 6911 6912

	if (!sev_guest(kvm))
		return -ENOTTY;

	if (copy_from_user(&params, (void __user *)(uintptr_t)argp->data, sizeof(params)))
		return -EFAULT;

	pages = sev_pin_memory(kvm, params.guest_uaddr, params.guest_len, &n, 1);
	if (!pages)
		return -ENOMEM;

	/*
	 * The secret must be copied into contiguous memory region, lets verify
	 * that userspace memory pages are contiguous before we issue command.
	 */
	if (get_num_contig_pages(0, pages, n) != n) {
		ret = -EINVAL;
		goto e_unpin_memory;
	}

	ret = -ENOMEM;
6913
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6914 6915 6916
	if (!data)
		goto e_unpin_memory;

6917 6918 6919 6920
	offset = params.guest_uaddr & (PAGE_SIZE - 1);
	data->guest_address = __sme_page_pa(pages[0]) + offset;
	data->guest_len = params.guest_len;

6921 6922 6923 6924 6925 6926 6927 6928 6929 6930 6931 6932 6933 6934
	blob = psp_copy_user_blob(params.trans_uaddr, params.trans_len);
	if (IS_ERR(blob)) {
		ret = PTR_ERR(blob);
		goto e_free;
	}

	data->trans_address = __psp_pa(blob);
	data->trans_len = params.trans_len;

	hdr = psp_copy_user_blob(params.hdr_uaddr, params.hdr_len);
	if (IS_ERR(hdr)) {
		ret = PTR_ERR(hdr);
		goto e_free_blob;
	}
6935 6936
	data->hdr_address = __psp_pa(hdr);
	data->hdr_len = params.hdr_len;
6937 6938 6939 6940 6941 6942 6943 6944 6945 6946 6947 6948 6949 6950 6951

	data->handle = sev->handle;
	ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_UPDATE_SECRET, data, &argp->error);

	kfree(hdr);

e_free_blob:
	kfree(blob);
e_free:
	kfree(data);
e_unpin_memory:
	sev_unpin_memory(kvm, pages, n);
	return ret;
}

B
Brijesh Singh 已提交
6952 6953 6954 6955 6956 6957 6958 6959 6960 6961 6962 6963 6964 6965 6966 6967 6968
static int svm_mem_enc_op(struct kvm *kvm, void __user *argp)
{
	struct kvm_sev_cmd sev_cmd;
	int r;

	if (!svm_sev_enabled())
		return -ENOTTY;

	if (copy_from_user(&sev_cmd, argp, sizeof(struct kvm_sev_cmd)))
		return -EFAULT;

	mutex_lock(&kvm->lock);

	switch (sev_cmd.id) {
	case KVM_SEV_INIT:
		r = sev_guest_init(kvm, &sev_cmd);
		break;
6969 6970 6971
	case KVM_SEV_LAUNCH_START:
		r = sev_launch_start(kvm, &sev_cmd);
		break;
6972 6973 6974
	case KVM_SEV_LAUNCH_UPDATE_DATA:
		r = sev_launch_update_data(kvm, &sev_cmd);
		break;
6975 6976 6977
	case KVM_SEV_LAUNCH_MEASURE:
		r = sev_launch_measure(kvm, &sev_cmd);
		break;
6978 6979 6980
	case KVM_SEV_LAUNCH_FINISH:
		r = sev_launch_finish(kvm, &sev_cmd);
		break;
6981 6982 6983
	case KVM_SEV_GUEST_STATUS:
		r = sev_guest_status(kvm, &sev_cmd);
		break;
6984 6985 6986
	case KVM_SEV_DBG_DECRYPT:
		r = sev_dbg_crypt(kvm, &sev_cmd, true);
		break;
6987 6988 6989
	case KVM_SEV_DBG_ENCRYPT:
		r = sev_dbg_crypt(kvm, &sev_cmd, false);
		break;
6990 6991 6992
	case KVM_SEV_LAUNCH_SECRET:
		r = sev_launch_secret(kvm, &sev_cmd);
		break;
B
Brijesh Singh 已提交
6993 6994 6995 6996 6997 6998 6999 7000 7001 7002 7003 7004 7005
	default:
		r = -EINVAL;
		goto out;
	}

	if (copy_to_user(argp, &sev_cmd, sizeof(struct kvm_sev_cmd)))
		r = -EFAULT;

out:
	mutex_unlock(&kvm->lock);
	return r;
}

7006 7007 7008
static int svm_register_enc_region(struct kvm *kvm,
				   struct kvm_enc_region *range)
{
7009
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
7010 7011 7012 7013 7014 7015
	struct enc_region *region;
	int ret = 0;

	if (!sev_guest(kvm))
		return -ENOTTY;

7016 7017 7018
	if (range->addr > ULONG_MAX || range->size > ULONG_MAX)
		return -EINVAL;

7019
	region = kzalloc(sizeof(*region), GFP_KERNEL_ACCOUNT);
7020 7021 7022 7023 7024 7025 7026 7027 7028 7029 7030 7031 7032 7033 7034 7035 7036 7037 7038 7039 7040 7041 7042 7043 7044 7045 7046 7047 7048 7049 7050 7051 7052 7053
	if (!region)
		return -ENOMEM;

	region->pages = sev_pin_memory(kvm, range->addr, range->size, &region->npages, 1);
	if (!region->pages) {
		ret = -ENOMEM;
		goto e_free;
	}

	/*
	 * The guest may change the memory encryption attribute from C=0 -> C=1
	 * or vice versa for this memory range. Lets make sure caches are
	 * flushed to ensure that guest data gets written into memory with
	 * correct C-bit.
	 */
	sev_clflush_pages(region->pages, region->npages);

	region->uaddr = range->addr;
	region->size = range->size;

	mutex_lock(&kvm->lock);
	list_add_tail(&region->list, &sev->regions_list);
	mutex_unlock(&kvm->lock);

	return ret;

e_free:
	kfree(region);
	return ret;
}

static struct enc_region *
find_enc_region(struct kvm *kvm, struct kvm_enc_region *range)
{
7054
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
7055 7056 7057 7058 7059 7060 7061 7062 7063 7064 7065 7066 7067 7068 7069 7070 7071 7072 7073 7074 7075 7076 7077 7078 7079 7080 7081 7082 7083 7084 7085 7086 7087 7088 7089 7090 7091 7092 7093 7094 7095 7096
	struct list_head *head = &sev->regions_list;
	struct enc_region *i;

	list_for_each_entry(i, head, list) {
		if (i->uaddr == range->addr &&
		    i->size == range->size)
			return i;
	}

	return NULL;
}


static int svm_unregister_enc_region(struct kvm *kvm,
				     struct kvm_enc_region *range)
{
	struct enc_region *region;
	int ret;

	mutex_lock(&kvm->lock);

	if (!sev_guest(kvm)) {
		ret = -ENOTTY;
		goto failed;
	}

	region = find_enc_region(kvm, range);
	if (!region) {
		ret = -EINVAL;
		goto failed;
	}

	__unregister_enc_region_locked(kvm, region);

	mutex_unlock(&kvm->lock);
	return 0;

failed:
	mutex_unlock(&kvm->lock);
	return ret;
}

7097 7098
static bool svm_need_emulation_on_page_fault(struct kvm_vcpu *vcpu)
{
7099 7100 7101 7102
	unsigned long cr4 = kvm_read_cr4(vcpu);
	bool smep = cr4 & X86_CR4_SMEP;
	bool smap = cr4 & X86_CR4_SMAP;
	bool is_user = svm_get_cpl(vcpu) == 3;
7103 7104

	/*
7105 7106 7107 7108 7109 7110 7111 7112 7113 7114 7115 7116 7117 7118 7119 7120 7121 7122 7123 7124 7125 7126 7127 7128 7129 7130 7131 7132 7133
	 * Detect and workaround Errata 1096 Fam_17h_00_0Fh.
	 *
	 * Errata:
	 * When CPU raise #NPF on guest data access and vCPU CR4.SMAP=1, it is
	 * possible that CPU microcode implementing DecodeAssist will fail
	 * to read bytes of instruction which caused #NPF. In this case,
	 * GuestIntrBytes field of the VMCB on a VMEXIT will incorrectly
	 * return 0 instead of the correct guest instruction bytes.
	 *
	 * This happens because CPU microcode reading instruction bytes
	 * uses a special opcode which attempts to read data using CPL=0
	 * priviledges. The microcode reads CS:RIP and if it hits a SMAP
	 * fault, it gives up and returns no instruction bytes.
	 *
	 * Detection:
	 * We reach here in case CPU supports DecodeAssist, raised #NPF and
	 * returned 0 in GuestIntrBytes field of the VMCB.
	 * First, errata can only be triggered in case vCPU CR4.SMAP=1.
	 * Second, if vCPU CR4.SMEP=1, errata could only be triggered
	 * in case vCPU CPL==3 (Because otherwise guest would have triggered
	 * a SMEP fault instead of #NPF).
	 * Otherwise, vCPU CR4.SMEP=0, errata could be triggered by any vCPU CPL.
	 * As most guests enable SMAP if they have also enabled SMEP, use above
	 * logic in order to attempt minimize false-positive of detecting errata
	 * while still preserving all cases semantic correctness.
	 *
	 * Workaround:
	 * To determine what instruction the guest was executing, the hypervisor
	 * will have to decode the instruction at the instruction pointer.
7134 7135 7136 7137 7138 7139 7140 7141 7142 7143
	 *
	 * In non SEV guest, hypervisor will be able to read the guest
	 * memory to decode the instruction pointer when insn_len is zero
	 * so we return true to indicate that decoding is possible.
	 *
	 * But in the SEV guest, the guest memory is encrypted with the
	 * guest specific key and hypervisor will not be able to decode the
	 * instruction pointer so we will not able to workaround it. Lets
	 * print the error and request to kill the guest.
	 */
7144
	if (smap && (!smep || is_user)) {
7145 7146 7147
		if (!sev_guest(vcpu->kvm))
			return true;

7148
		pr_err_ratelimited("KVM: SEV Guest triggered AMD Erratum 1096\n");
7149 7150 7151 7152 7153 7154
		kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
	}

	return false;
}

7155 7156 7157 7158 7159 7160 7161 7162 7163 7164 7165 7166 7167 7168 7169
static bool svm_apic_init_signal_blocked(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	/*
	 * TODO: Last condition latch INIT signals on vCPU when
	 * vCPU is in guest-mode and vmcb12 defines intercept on INIT.
	 * To properly emulate the INIT intercept, SVM should implement
	 * kvm_x86_ops->check_nested_events() and call nested_svm_vmexit()
	 * there if an INIT signal is pending.
	 */
	return !gif_set(svm) ||
		   (svm->vmcb->control.intercept & (1ULL << INTERCEPT_INIT));
}

7170
static struct kvm_x86_ops svm_x86_ops __ro_after_init = {
A
Avi Kivity 已提交
7171 7172 7173 7174
	.cpu_has_kvm_support = has_svm,
	.disabled_by_bios = is_disabled,
	.hardware_setup = svm_hardware_setup,
	.hardware_unsetup = svm_hardware_unsetup,
Y
Yang, Sheng 已提交
7175
	.check_processor_compatibility = svm_check_processor_compat,
A
Avi Kivity 已提交
7176 7177
	.hardware_enable = svm_hardware_enable,
	.hardware_disable = svm_hardware_disable,
7178
	.cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr,
7179
	.has_emulated_msr = svm_has_emulated_msr,
A
Avi Kivity 已提交
7180 7181 7182

	.vcpu_create = svm_create_vcpu,
	.vcpu_free = svm_free_vcpu,
7183
	.vcpu_reset = svm_vcpu_reset,
A
Avi Kivity 已提交
7184

7185 7186
	.vm_alloc = svm_vm_alloc,
	.vm_free = svm_vm_free,
7187
	.vm_init = avic_vm_init,
B
Brijesh Singh 已提交
7188
	.vm_destroy = svm_vm_destroy,
7189

7190
	.prepare_guest_switch = svm_prepare_guest_switch,
A
Avi Kivity 已提交
7191 7192
	.vcpu_load = svm_vcpu_load,
	.vcpu_put = svm_vcpu_put,
7193 7194
	.vcpu_blocking = svm_vcpu_blocking,
	.vcpu_unblocking = svm_vcpu_unblocking,
A
Avi Kivity 已提交
7195

7196
	.update_bp_intercept = update_bp_intercept,
7197
	.get_msr_feature = svm_get_msr_feature,
A
Avi Kivity 已提交
7198 7199 7200 7201 7202
	.get_msr = svm_get_msr,
	.set_msr = svm_set_msr,
	.get_segment_base = svm_get_segment_base,
	.get_segment = svm_get_segment,
	.set_segment = svm_set_segment,
7203
	.get_cpl = svm_get_cpl,
7204
	.get_cs_db_l_bits = kvm_get_cs_db_l_bits,
7205
	.decache_cr0_guest_bits = svm_decache_cr0_guest_bits,
7206
	.decache_cr3 = svm_decache_cr3,
7207
	.decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
A
Avi Kivity 已提交
7208 7209 7210 7211 7212 7213 7214 7215
	.set_cr0 = svm_set_cr0,
	.set_cr3 = svm_set_cr3,
	.set_cr4 = svm_set_cr4,
	.set_efer = svm_set_efer,
	.get_idt = svm_get_idt,
	.set_idt = svm_set_idt,
	.get_gdt = svm_get_gdt,
	.set_gdt = svm_set_gdt,
J
Jan Kiszka 已提交
7216 7217
	.get_dr6 = svm_get_dr6,
	.set_dr6 = svm_set_dr6,
7218
	.set_dr7 = svm_set_dr7,
7219
	.sync_dirty_debug_regs = svm_sync_dirty_debug_regs,
A
Avi Kivity 已提交
7220
	.cache_reg = svm_cache_reg,
A
Avi Kivity 已提交
7221 7222
	.get_rflags = svm_get_rflags,
	.set_rflags = svm_set_rflags,
7223

A
Avi Kivity 已提交
7224
	.tlb_flush = svm_flush_tlb,
7225
	.tlb_flush_gva = svm_flush_tlb_gva,
A
Avi Kivity 已提交
7226 7227

	.run = svm_vcpu_run,
7228
	.handle_exit = handle_exit,
A
Avi Kivity 已提交
7229
	.skip_emulated_instruction = skip_emulated_instruction,
7230 7231
	.set_interrupt_shadow = svm_set_interrupt_shadow,
	.get_interrupt_shadow = svm_get_interrupt_shadow,
I
Ingo Molnar 已提交
7232
	.patch_hypercall = svm_patch_hypercall,
E
Eddie Dong 已提交
7233
	.set_irq = svm_set_irq,
7234
	.set_nmi = svm_inject_nmi,
7235
	.queue_exception = svm_queue_exception,
A
Avi Kivity 已提交
7236
	.cancel_injection = svm_cancel_injection,
7237
	.interrupt_allowed = svm_interrupt_allowed,
7238
	.nmi_allowed = svm_nmi_allowed,
J
Jan Kiszka 已提交
7239 7240
	.get_nmi_mask = svm_get_nmi_mask,
	.set_nmi_mask = svm_set_nmi_mask,
7241 7242 7243
	.enable_nmi_window = enable_nmi_window,
	.enable_irq_window = enable_irq_window,
	.update_cr8_intercept = update_cr8_intercept,
7244
	.set_virtual_apic_mode = svm_set_virtual_apic_mode,
7245 7246
	.get_enable_apicv = svm_get_enable_apicv,
	.refresh_apicv_exec_ctrl = svm_refresh_apicv_exec_ctrl,
7247
	.load_eoi_exitmap = svm_load_eoi_exitmap,
7248 7249
	.hwapic_irr_update = svm_hwapic_irr_update,
	.hwapic_isr_update = svm_hwapic_isr_update,
7250
	.sync_pir_to_irr = kvm_lapic_find_highest_irr,
7251
	.apicv_post_state_restore = avic_post_state_restore,
7252 7253

	.set_tss_addr = svm_set_tss_addr,
7254
	.set_identity_map_addr = svm_set_identity_map_addr,
7255
	.get_tdp_level = get_npt_level,
7256
	.get_mt_mask = svm_get_mt_mask,
7257

7258 7259
	.get_exit_info = svm_get_exit_info,

7260
	.get_lpage_level = svm_get_lpage_level,
7261 7262

	.cpuid_update = svm_cpuid_update,
7263 7264

	.rdtscp_supported = svm_rdtscp_supported,
7265
	.invpcid_supported = svm_invpcid_supported,
7266
	.mpx_supported = svm_mpx_supported,
7267
	.xsaves_supported = svm_xsaves_supported,
7268
	.umip_emulated = svm_umip_emulated,
7269
	.pt_supported = svm_pt_supported,
7270 7271

	.set_supported_cpuid = svm_set_supported_cpuid,
7272 7273

	.has_wbinvd_exit = svm_has_wbinvd_exit,
7274

7275
	.read_l1_tsc_offset = svm_read_l1_tsc_offset,
7276
	.write_l1_tsc_offset = svm_write_l1_tsc_offset,
7277 7278

	.set_tdp_cr3 = set_tdp_cr3,
7279 7280

	.check_intercept = svm_check_intercept,
7281
	.handle_exit_irqoff = svm_handle_exit_irqoff,
7282

7283 7284
	.request_immediate_exit = __kvm_request_immediate_exit,

7285
	.sched_in = svm_sched_in,
7286 7287

	.pmu_ops = &amd_pmu_ops,
7288
	.deliver_posted_interrupt = svm_deliver_avic_intr,
7289
	.dy_apicv_has_pending_interrupt = svm_dy_apicv_has_pending_interrupt,
7290
	.update_pi_irte = svm_update_pi_irte,
7291
	.setup_mce = svm_setup_mce,
7292

7293
	.smi_allowed = svm_smi_allowed,
7294 7295
	.pre_enter_smm = svm_pre_enter_smm,
	.pre_leave_smm = svm_pre_leave_smm,
7296
	.enable_smi_window = enable_smi_window,
B
Brijesh Singh 已提交
7297 7298

	.mem_enc_op = svm_mem_enc_op,
7299 7300
	.mem_enc_reg_region = svm_register_enc_region,
	.mem_enc_unreg_region = svm_unregister_enc_region,
7301

7302
	.nested_enable_evmcs = NULL,
7303
	.nested_get_evmcs_version = NULL,
7304 7305

	.need_emulation_on_page_fault = svm_need_emulation_on_page_fault,
7306 7307

	.apic_init_signal_blocked = svm_apic_init_signal_blocked,
A
Avi Kivity 已提交
7308 7309 7310 7311
};

static int __init svm_init(void)
{
7312
	return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm),
7313
			__alignof__(struct vcpu_svm), THIS_MODULE);
A
Avi Kivity 已提交
7314 7315 7316 7317
}

static void __exit svm_exit(void)
{
7318
	kvm_exit();
A
Avi Kivity 已提交
7319 7320 7321 7322
}

module_init(svm_init)
module_exit(svm_exit)