svm.c 186.9 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;
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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
Avi Kivity 已提交
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

780 781 782 783 784 785 786 787 788
	if (!svm->next_rip) {
		if (!kvm_emulate_instruction(vcpu, EMULTYPE_SKIP))
			return 0;
	} else {
		if (svm->next_rip - kvm_rip_read(vcpu) > MAX_INST_SIZE)
			pr_err("%s: ip 0x%lx next 0x%llx\n",
			       __func__, kvm_rip_read(vcpu), svm->next_rip);
		kvm_rip_write(vcpu, svm->next_rip);
	}
789
	svm_set_interrupt_shadow(vcpu, 0);
790

791
	return 1;
A
Avi Kivity 已提交
792 793
}

794
static void svm_queue_exception(struct kvm_vcpu *vcpu)
J
Jan Kiszka 已提交
795 796
{
	struct vcpu_svm *svm = to_svm(vcpu);
797 798
	unsigned nr = vcpu->arch.exception.nr;
	bool has_error_code = vcpu->arch.exception.has_error_code;
799
	bool reinject = vcpu->arch.exception.injected;
800
	u32 error_code = vcpu->arch.exception.error_code;
J
Jan Kiszka 已提交
801

J
Joerg Roedel 已提交
802 803 804 805
	/*
	 * If we are within a nested VM we'd better #VMEXIT and let the guest
	 * handle the exception
	 */
806 807
	if (!reinject &&
	    nested_svm_check_exception(svm, nr, has_error_code, error_code))
J
Jan Kiszka 已提交
808 809
		return;

810 811
	kvm_deliver_exception_payload(&svm->vcpu);

812
	if (nr == BP_VECTOR && !nrips) {
813 814 815 816 817 818 819 820 821
		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.
		 */
822
		(void)skip_emulated_instruction(&svm->vcpu);
823 824 825 826 827
		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
828 829 830 831 832 833 834
	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;
}

835 836 837 838 839 840
static void svm_init_erratum_383(void)
{
	u32 low, high;
	int err;
	u64 val;

841
	if (!static_cpu_has_bug(X86_BUG_AMD_TLB_MMATCH))
842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858
		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;
}

859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879
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
880 881
static int has_svm(void)
{
882
	const char *msg;
A
Avi Kivity 已提交
883

884
	if (!cpu_has_svm(&msg)) {
J
Joe Perches 已提交
885
		printk(KERN_INFO "has_svm: %s\n", msg);
A
Avi Kivity 已提交
886 887 888 889 890 891
		return 0;
	}

	return 1;
}

892
static void svm_hardware_disable(void)
A
Avi Kivity 已提交
893
{
894 895 896 897
	/* Make sure we clean up behind us */
	if (static_cpu_has(X86_FEATURE_TSCRATEMSR))
		wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);

898
	cpu_svm_disable();
899 900

	amd_pmu_disable_virt();
A
Avi Kivity 已提交
901 902
}

903
static int svm_hardware_enable(void)
A
Avi Kivity 已提交
904 905
{

906
	struct svm_cpu_data *sd;
A
Avi Kivity 已提交
907 908 909 910
	uint64_t efer;
	struct desc_struct *gdt;
	int me = raw_smp_processor_id();

911 912 913 914
	rdmsrl(MSR_EFER, efer);
	if (efer & EFER_SVME)
		return -EBUSY;

A
Avi Kivity 已提交
915
	if (!has_svm()) {
916
		pr_err("%s: err EOPNOTSUPP on %d\n", __func__, me);
917
		return -EINVAL;
A
Avi Kivity 已提交
918
	}
919 920
	sd = per_cpu(svm_data, me);
	if (!sd) {
921
		pr_err("%s: svm_data is NULL on %d\n", __func__, me);
922
		return -EINVAL;
A
Avi Kivity 已提交
923 924
	}

925 926 927
	sd->asid_generation = 1;
	sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
	sd->next_asid = sd->max_asid + 1;
928
	sd->min_asid = max_sev_asid + 1;
A
Avi Kivity 已提交
929

930
	gdt = get_current_gdt_rw();
931
	sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
A
Avi Kivity 已提交
932

933
	wrmsrl(MSR_EFER, efer | EFER_SVME);
A
Avi Kivity 已提交
934

935
	wrmsrl(MSR_VM_HSAVE_PA, page_to_pfn(sd->save_area) << PAGE_SHIFT);
936

937 938
	if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) {
		wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);
939
		__this_cpu_write(current_tsc_ratio, TSC_RATIO_DEFAULT);
940 941
	}

942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971

	/*
	 * 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;

972 973
	svm_init_erratum_383();

974 975
	amd_pmu_enable_virt();

976
	return 0;
A
Avi Kivity 已提交
977 978
}

979 980
static void svm_cpu_uninit(int cpu)
{
981
	struct svm_cpu_data *sd = per_cpu(svm_data, raw_smp_processor_id());
982

983
	if (!sd)
984 985 986
		return;

	per_cpu(svm_data, raw_smp_processor_id()) = NULL;
987
	kfree(sd->sev_vmcbs);
988 989
	__free_page(sd->save_area);
	kfree(sd);
990 991
}

A
Avi Kivity 已提交
992 993
static int svm_cpu_init(int cpu)
{
994
	struct svm_cpu_data *sd;
A
Avi Kivity 已提交
995 996
	int r;

997 998
	sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
	if (!sd)
A
Avi Kivity 已提交
999
		return -ENOMEM;
1000
	sd->cpu = cpu;
A
Avi Kivity 已提交
1001
	r = -ENOMEM;
1002
	sd->save_area = alloc_page(GFP_KERNEL);
1003
	if (!sd->save_area)
A
Avi Kivity 已提交
1004 1005
		goto err_1;

1006 1007
	if (svm_sev_enabled()) {
		r = -ENOMEM;
1008 1009 1010
		sd->sev_vmcbs = kmalloc_array(max_sev_asid + 1,
					      sizeof(void *),
					      GFP_KERNEL);
1011 1012 1013 1014
		if (!sd->sev_vmcbs)
			goto err_1;
	}

1015
	per_cpu(svm_data, cpu) = sd;
A
Avi Kivity 已提交
1016 1017 1018 1019

	return 0;

err_1:
1020
	kfree(sd);
A
Avi Kivity 已提交
1021 1022 1023 1024
	return r;

}

1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035
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;
}

1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054
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);
}

1055 1056
static void set_msr_interception(u32 *msrpm, unsigned msr,
				 int read, int write)
A
Avi Kivity 已提交
1057
{
1058 1059 1060
	u8 bit_read, bit_write;
	unsigned long tmp;
	u32 offset;
A
Avi Kivity 已提交
1061

1062 1063 1064 1065 1066 1067
	/*
	 * If this warning triggers extend the direct_access_msrs list at the
	 * beginning of the file
	 */
	WARN_ON(!valid_msr_intercept(msr));

1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078
	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
1079 1080
}

1081
static void svm_vcpu_init_msrpm(u32 *msrpm)
A
Avi Kivity 已提交
1082 1083 1084
{
	int i;

1085 1086
	memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));

1087 1088 1089 1090 1091 1092
	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);
	}
1093 1094
}

1095 1096 1097 1098 1099 1100 1101 1102
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)
1103
			return;
1104 1105 1106 1107 1108 1109 1110 1111 1112

		/* 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
1113
	}
1114 1115 1116 1117 1118

	/*
	 * If this BUG triggers the msrpm_offsets table has an overflow. Just
	 * increase MSRPM_OFFSETS in this case.
	 */
1119
	BUG();
A
Avi Kivity 已提交
1120 1121
}

1122
static void init_msrpm_offsets(void)
1123
{
1124
	int i;
1125

1126 1127 1128 1129 1130 1131 1132 1133 1134 1135
	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);
	}
1136 1137
}

1138 1139 1140 1141
static void svm_enable_lbrv(struct vcpu_svm *svm)
{
	u32 *msrpm = svm->msrpm;

1142
	svm->vmcb->control.virt_ext |= LBR_CTL_ENABLE_MASK;
1143 1144 1145 1146 1147 1148 1149 1150 1151 1152
	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;

1153
	svm->vmcb->control.virt_ext &= ~LBR_CTL_ENABLE_MASK;
1154 1155 1156 1157 1158 1159
	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);
}

1160 1161 1162
static void disable_nmi_singlestep(struct vcpu_svm *svm)
{
	svm->nmi_singlestep = false;
1163

1164 1165 1166 1167 1168 1169 1170
	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;
	}
1171 1172
}

1173
/* Note:
1174
 * This hash table is used to map VM_ID to a struct kvm_svm,
1175 1176 1177 1178
 * when handling AMD IOMMU GALOG notification to schedule in
 * a particular vCPU.
 */
#define SVM_VM_DATA_HASH_BITS	8
1179
static DEFINE_HASHTABLE(svm_vm_data_hash, SVM_VM_DATA_HASH_BITS);
1180 1181
static u32 next_vm_id = 0;
static bool next_vm_id_wrapped = 0;
1182
static DEFINE_SPINLOCK(svm_vm_data_hash_lock);
1183 1184 1185 1186 1187 1188 1189 1190

/* 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;
1191
	struct kvm_svm *kvm_svm;
1192 1193 1194 1195 1196 1197 1198
	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);
1199 1200
	hash_for_each_possible(svm_vm_data_hash, kvm_svm, hnode, vm_id) {
		if (kvm_svm->avic_vm_id != vm_id)
1201
			continue;
1202
		vcpu = kvm_get_vcpu_by_id(&kvm_svm->kvm, vcpu_id);
1203 1204 1205 1206 1207 1208 1209 1210 1211
		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.
	 */
1212
	if (vcpu)
1213 1214 1215 1216 1217
		kvm_vcpu_wake_up(vcpu);

	return 0;
}

B
Brijesh Singh 已提交
1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228
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
1229 1230 1231 1232
	/* Minimum ASID value that should be used for SEV guest */
	min_sev_asid = cpuid_edx(0x8000001F);

	/* Initialize SEV ASID bitmap */
1233
	sev_asid_bitmap = bitmap_zalloc(max_sev_asid, GFP_KERNEL);
B
Brijesh Singh 已提交
1234 1235 1236
	if (!sev_asid_bitmap)
		return 1;

B
Brijesh Singh 已提交
1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258
	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;
}

1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269
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
1270
	if (control->pause_filter_count != old) {
1271
		mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
P
Peter Xu 已提交
1272 1273 1274
		trace_kvm_ple_window_update(vcpu->vcpu_id,
					    control->pause_filter_count, old);
	}
1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287
}

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
1288
	if (control->pause_filter_count != old) {
1289
		mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
P
Peter Xu 已提交
1290 1291 1292
		trace_kvm_ple_window_update(vcpu->vcpu_id,
					    control->pause_filter_count, old);
	}
1293 1294
}

A
Avi Kivity 已提交
1295 1296 1297 1298
static __init int svm_hardware_setup(void)
{
	int cpu;
	struct page *iopm_pages;
1299
	void *iopm_va;
A
Avi Kivity 已提交
1300 1301 1302 1303 1304 1305
	int r;

	iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);

	if (!iopm_pages)
		return -ENOMEM;
1306 1307 1308

	iopm_va = page_address(iopm_pages);
	memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
A
Avi Kivity 已提交
1309 1310
	iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;

1311 1312
	init_msrpm_offsets();

1313 1314 1315
	if (boot_cpu_has(X86_FEATURE_NX))
		kvm_enable_efer_bits(EFER_NX);

A
Alexander Graf 已提交
1316 1317 1318
	if (boot_cpu_has(X86_FEATURE_FXSR_OPT))
		kvm_enable_efer_bits(EFER_FFXSR);

1319 1320
	if (boot_cpu_has(X86_FEATURE_TSCRATEMSR)) {
		kvm_has_tsc_control = true;
1321 1322
		kvm_max_tsc_scaling_ratio = TSC_RATIO_MAX;
		kvm_tsc_scaling_ratio_frac_bits = 32;
1323 1324
	}

1325 1326 1327 1328 1329 1330 1331 1332
	/* 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;
	}

1333 1334
	if (nested) {
		printk(KERN_INFO "kvm: Nested Virtualization enabled\n");
1335
		kvm_enable_efer_bits(EFER_SVME | EFER_LMSLE);
1336 1337
	}

B
Brijesh Singh 已提交
1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348
	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
1349
	for_each_possible_cpu(cpu) {
A
Avi Kivity 已提交
1350 1351
		r = svm_cpu_init(cpu);
		if (r)
1352
			goto err;
A
Avi Kivity 已提交
1353
	}
1354

1355
	if (!boot_cpu_has(X86_FEATURE_NPT))
1356 1357
		npt_enabled = false;

1358 1359 1360 1361 1362
	if (npt_enabled && !npt) {
		printk(KERN_INFO "kvm: Nested Paging disabled\n");
		npt_enabled = false;
	}

1363
	if (npt_enabled) {
1364
		printk(KERN_INFO "kvm: Nested Paging enabled\n");
1365
		kvm_enable_tdp();
1366 1367
	} else
		kvm_disable_tdp();
1368

1369 1370 1371 1372 1373
	if (nrips) {
		if (!boot_cpu_has(X86_FEATURE_NRIPS))
			nrips = false;
	}

1374 1375 1376
	if (avic) {
		if (!npt_enabled ||
		    !boot_cpu_has(X86_FEATURE_AVIC) ||
1377
		    !IS_ENABLED(CONFIG_X86_LOCAL_APIC)) {
1378
			avic = false;
1379
		} else {
1380
			pr_info("AVIC enabled\n");
1381 1382 1383

			amd_iommu_register_ga_log_notifier(&avic_ga_log_notifier);
		}
1384
	}
1385

1386 1387
	if (vls) {
		if (!npt_enabled ||
1388
		    !boot_cpu_has(X86_FEATURE_V_VMSAVE_VMLOAD) ||
1389 1390 1391 1392 1393 1394 1395
		    !IS_ENABLED(CONFIG_X86_64)) {
			vls = false;
		} else {
			pr_info("Virtual VMLOAD VMSAVE supported\n");
		}
	}

1396 1397 1398 1399 1400 1401 1402
	if (vgif) {
		if (!boot_cpu_has(X86_FEATURE_VGIF))
			vgif = false;
		else
			pr_info("Virtual GIF supported\n");
	}

A
Avi Kivity 已提交
1403 1404
	return 0;

1405
err:
A
Avi Kivity 已提交
1406 1407 1408 1409 1410 1411 1412
	__free_pages(iopm_pages, IOPM_ALLOC_ORDER);
	iopm_base = 0;
	return r;
}

static __exit void svm_hardware_unsetup(void)
{
1413 1414
	int cpu;

B
Brijesh Singh 已提交
1415
	if (svm_sev_enabled())
1416
		bitmap_free(sev_asid_bitmap);
B
Brijesh Singh 已提交
1417

Z
Zachary Amsden 已提交
1418
	for_each_possible_cpu(cpu)
1419 1420
		svm_cpu_uninit(cpu);

A
Avi Kivity 已提交
1421
	__free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
1422
	iopm_base = 0;
A
Avi Kivity 已提交
1423 1424 1425 1426 1427 1428
}

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
1429
		      SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
A
Avi Kivity 已提交
1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441
	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;
}

1442 1443 1444 1445 1446 1447 1448 1449 1450 1451
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;
}

1452
static u64 svm_write_l1_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
1453 1454 1455 1456
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u64 g_tsc_offset = 0;

1457
	if (is_guest_mode(vcpu)) {
1458
		/* Write L1's TSC offset.  */
1459 1460 1461
		g_tsc_offset = svm->vmcb->control.tsc_offset -
			       svm->nested.hsave->control.tsc_offset;
		svm->nested.hsave->control.tsc_offset = offset;
1462 1463 1464 1465 1466
	}

	trace_kvm_write_tsc_offset(vcpu->vcpu_id,
				   svm->vmcb->control.tsc_offset - g_tsc_offset,
				   offset);
1467 1468

	svm->vmcb->control.tsc_offset = offset + g_tsc_offset;
1469 1470

	mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
1471
	return svm->vmcb->control.tsc_offset;
1472 1473
}

1474 1475 1476
static void avic_init_vmcb(struct vcpu_svm *svm)
{
	struct vmcb *vmcb = svm->vmcb;
1477
	struct kvm_svm *kvm_svm = to_kvm_svm(svm->vcpu.kvm);
1478
	phys_addr_t bpa = __sme_set(page_to_phys(svm->avic_backing_page));
1479 1480
	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));
1481 1482 1483 1484 1485 1486 1487 1488

	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
1489
static void init_vmcb(struct vcpu_svm *svm)
A
Avi Kivity 已提交
1490
{
1491 1492
	struct vmcb_control_area *control = &svm->vmcb->control;
	struct vmcb_save_area *save = &svm->vmcb->save;
A
Avi Kivity 已提交
1493

1494
	svm->vcpu.arch.hflags = 0;
1495

1496 1497 1498 1499 1500 1501
	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);
1502 1503
	if (!kvm_vcpu_apicv_active(&svm->vcpu))
		set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
A
Avi Kivity 已提交
1504

1505
	set_dr_intercepts(svm);
A
Avi Kivity 已提交
1506

1507 1508 1509
	set_exception_intercept(svm, PF_VECTOR);
	set_exception_intercept(svm, UD_VECTOR);
	set_exception_intercept(svm, MC_VECTOR);
1510
	set_exception_intercept(svm, AC_VECTOR);
1511
	set_exception_intercept(svm, DB_VECTOR);
1512 1513 1514 1515 1516 1517 1518 1519
	/*
	 * 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
1520

1521 1522 1523 1524
	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
1525
	set_intercept(svm, INTERCEPT_RDPMC);
1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541
	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
1542
	set_intercept(svm, INTERCEPT_XSETBV);
J
Jim Mattson 已提交
1543
	set_intercept(svm, INTERCEPT_RDPRU);
B
Brijesh Singh 已提交
1544
	set_intercept(svm, INTERCEPT_RSM);
A
Avi Kivity 已提交
1545

1546
	if (!kvm_mwait_in_guest(svm->vcpu.kvm)) {
1547 1548 1549 1550
		set_intercept(svm, INTERCEPT_MONITOR);
		set_intercept(svm, INTERCEPT_MWAIT);
	}

1551 1552 1553
	if (!kvm_hlt_in_guest(svm->vcpu.kvm))
		set_intercept(svm, INTERCEPT_HLT);

1554 1555
	control->iopm_base_pa = __sme_set(iopm_base);
	control->msrpm_base_pa = __sme_set(__pa(svm->msrpm));
A
Avi Kivity 已提交
1556 1557 1558 1559 1560 1561 1562 1563 1564
	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;
1565
	save->cs.base = 0xffff0000;
A
Avi Kivity 已提交
1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576
	/* 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
1577
	svm_set_efer(&svm->vcpu, 0);
M
Mike Day 已提交
1578
	save->dr6 = 0xffff0ff0;
1579
	kvm_set_rflags(&svm->vcpu, 2);
A
Avi Kivity 已提交
1580
	save->rip = 0x0000fff0;
1581
	svm->vcpu.arch.regs[VCPU_REGS_RIP] = save->rip;
A
Avi Kivity 已提交
1582

J
Joerg Roedel 已提交
1583
	/*
1584
	 * svm_set_cr0() sets PG and WP and clears NW and CD on save->cr0.
1585
	 * It also updates the guest-visible cr0 value.
A
Avi Kivity 已提交
1586
	 */
1587
	svm_set_cr0(&svm->vcpu, X86_CR0_NW | X86_CR0_CD | X86_CR0_ET);
1588
	kvm_mmu_reset_context(&svm->vcpu);
1589

1590
	save->cr4 = X86_CR4_PAE;
A
Avi Kivity 已提交
1591
	/* rdx = ?? */
1592 1593 1594

	if (npt_enabled) {
		/* Setup VMCB for Nested Paging */
1595
		control->nested_ctl |= SVM_NESTED_CTL_NP_ENABLE;
1596
		clr_intercept(svm, INTERCEPT_INVLPG);
1597
		clr_exception_intercept(svm, PF_VECTOR);
1598 1599
		clr_cr_intercept(svm, INTERCEPT_CR3_READ);
		clr_cr_intercept(svm, INTERCEPT_CR3_WRITE);
1600
		save->g_pat = svm->vcpu.arch.pat;
1601 1602 1603
		save->cr3 = 0;
		save->cr4 = 0;
	}
1604
	svm->asid_generation = 0;
1605

1606
	svm->nested.vmcb = 0;
1607 1608
	svm->vcpu.arch.hflags = 0;

1609 1610 1611 1612
	if (pause_filter_count) {
		control->pause_filter_count = pause_filter_count;
		if (pause_filter_thresh)
			control->pause_filter_thresh = pause_filter_thresh;
1613
		set_intercept(svm, INTERCEPT_PAUSE);
1614 1615
	} else {
		clr_intercept(svm, INTERCEPT_PAUSE);
1616 1617
	}

1618
	if (kvm_vcpu_apicv_active(&svm->vcpu))
1619 1620
		avic_init_vmcb(svm);

1621 1622 1623 1624 1625 1626 1627 1628 1629 1630
	/*
	 * 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;
	}

1631 1632 1633 1634 1635 1636
	if (vgif) {
		clr_intercept(svm, INTERCEPT_STGI);
		clr_intercept(svm, INTERCEPT_CLGI);
		svm->vmcb->control.int_ctl |= V_GIF_ENABLE_MASK;
	}

1637
	if (sev_guest(svm->vcpu.kvm)) {
B
Brijesh Singh 已提交
1638
		svm->vmcb->control.nested_ctl |= SVM_NESTED_CTL_SEV_ENABLE;
1639 1640
		clr_exception_intercept(svm, UD_VECTOR);
	}
B
Brijesh Singh 已提交
1641

1642 1643
	mark_all_dirty(svm->vmcb);

1644
	enable_gif(svm);
1645 1646 1647

}

1648 1649
static u64 *avic_get_physical_id_entry(struct kvm_vcpu *vcpu,
				       unsigned int index)
1650 1651
{
	u64 *avic_physical_id_table;
1652
	struct kvm_svm *kvm_svm = to_kvm_svm(vcpu->kvm);
1653 1654 1655 1656

	if (index >= AVIC_MAX_PHYSICAL_ID_COUNT)
		return NULL;

1657
	avic_physical_id_table = page_address(kvm_svm->avic_physical_id_table_page);
1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672

	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;
1673
	int ret = 0;
1674

1675
	mutex_lock(&kvm->slots_lock);
1676
	if (kvm->arch.apic_access_page_done)
1677
		goto out;
1678

1679 1680 1681 1682
	ret = __x86_set_memory_region(kvm,
				      APIC_ACCESS_PAGE_PRIVATE_MEMSLOT,
				      APIC_DEFAULT_PHYS_BASE,
				      PAGE_SIZE);
1683
	if (ret)
1684
		goto out;
1685 1686

	kvm->arch.apic_access_page_done = true;
1687 1688 1689
out:
	mutex_unlock(&kvm->slots_lock);
	return ret;
1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715
}

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;

1716 1717 1718
	new_entry = __sme_set((page_to_phys(svm->avic_backing_page) &
			      AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK) |
			      AVIC_PHYSICAL_ID_ENTRY_VALID_MASK);
1719 1720 1721 1722 1723 1724 1725
	WRITE_ONCE(*entry, new_entry);

	svm->avic_physical_id_cache = entry;

	return 0;
}

B
Brijesh Singh 已提交
1726 1727
static void __sev_asid_free(int asid)
{
1728 1729
	struct svm_cpu_data *sd;
	int cpu, pos;
B
Brijesh Singh 已提交
1730 1731 1732

	pos = asid - 1;
	clear_bit(pos, sev_asid_bitmap);
1733 1734 1735 1736 1737

	for_each_possible_cpu(cpu) {
		sd = per_cpu(svm_data, cpu);
		sd->sev_vmcbs[pos] = NULL;
	}
B
Brijesh Singh 已提交
1738 1739 1740 1741
}

static void sev_asid_free(struct kvm *kvm)
{
1742
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
B
Brijesh Singh 已提交
1743 1744 1745 1746

	__sev_asid_free(sev->asid);
}

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 1776 1777
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);
}

1778 1779 1780 1781
static struct page **sev_pin_memory(struct kvm *kvm, unsigned long uaddr,
				    unsigned long ulen, unsigned long *n,
				    int write)
{
1782
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1783 1784 1785
	unsigned long npages, npinned, size;
	unsigned long locked, lock_limit;
	struct page **pages;
1786 1787 1788 1789
	unsigned long first, last;

	if (ulen == 0 || uaddr + ulen < uaddr)
		return NULL;
1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805

	/* 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)
1806 1807
		pages = __vmalloc(size, GFP_KERNEL_ACCOUNT | __GFP_ZERO,
				  PAGE_KERNEL);
1808
	else
1809
		pages = kmalloc(size, GFP_KERNEL_ACCOUNT);
1810 1811 1812 1813 1814

	if (!pages)
		return NULL;

	/* Pin the user virtual address. */
1815
	npinned = get_user_pages_fast(uaddr, npages, FOLL_WRITE, pages);
1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836
	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)
{
1837
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858

	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);
	}
}

1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874
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);
}

1875 1876
static struct kvm *svm_vm_alloc(void)
{
1877 1878 1879
	struct kvm_svm *kvm_svm = __vmalloc(sizeof(struct kvm_svm),
					    GFP_KERNEL_ACCOUNT | __GFP_ZERO,
					    PAGE_KERNEL);
1880
	return &kvm_svm->kvm;
1881 1882 1883 1884
}

static void svm_vm_free(struct kvm *kvm)
{
1885
	vfree(to_kvm_svm(kvm));
1886 1887
}

B
Brijesh Singh 已提交
1888 1889
static void sev_vm_destroy(struct kvm *kvm)
{
1890
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1891 1892
	struct list_head *head = &sev->regions_list;
	struct list_head *pos, *q;
1893

B
Brijesh Singh 已提交
1894 1895 1896
	if (!sev_guest(kvm))
		return;

1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911
	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);

1912
	sev_unbind_asid(kvm, sev->handle);
B
Brijesh Singh 已提交
1913 1914 1915
	sev_asid_free(kvm);
}

1916 1917
static void avic_vm_destroy(struct kvm *kvm)
{
1918
	unsigned long flags;
1919
	struct kvm_svm *kvm_svm = to_kvm_svm(kvm);
1920

1921 1922 1923
	if (!avic)
		return;

1924 1925 1926 1927
	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);
1928 1929

	spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
1930
	hash_del(&kvm_svm->hnode);
1931
	spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);
1932 1933
}

B
Brijesh Singh 已提交
1934 1935 1936 1937 1938 1939
static void svm_vm_destroy(struct kvm *kvm)
{
	avic_vm_destroy(kvm);
	sev_vm_destroy(kvm);
}

1940 1941
static int avic_vm_init(struct kvm *kvm)
{
1942
	unsigned long flags;
1943
	int err = -ENOMEM;
1944 1945
	struct kvm_svm *kvm_svm = to_kvm_svm(kvm);
	struct kvm_svm *k2;
1946 1947
	struct page *p_page;
	struct page *l_page;
1948
	u32 vm_id;
1949 1950 1951 1952 1953

	if (!avic)
		return 0;

	/* Allocating physical APIC ID table (4KB) */
1954
	p_page = alloc_page(GFP_KERNEL_ACCOUNT);
1955 1956 1957
	if (!p_page)
		goto free_avic;

1958
	kvm_svm->avic_physical_id_table_page = p_page;
1959 1960 1961
	clear_page(page_address(p_page));

	/* Allocating logical APIC ID table (4KB) */
1962
	l_page = alloc_page(GFP_KERNEL_ACCOUNT);
1963 1964 1965
	if (!l_page)
		goto free_avic;

1966
	kvm_svm->avic_logical_id_table_page = l_page;
1967 1968
	clear_page(page_address(l_page));

1969
	spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
1970 1971 1972 1973 1974 1975 1976 1977
 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) {
1978 1979
		hash_for_each_possible(svm_vm_data_hash, k2, hnode, vm_id) {
			if (k2->avic_vm_id == vm_id)
1980 1981 1982
				goto again;
		}
	}
1983 1984
	kvm_svm->avic_vm_id = vm_id;
	hash_add(svm_vm_data_hash, &kvm_svm->hnode, kvm_svm->avic_vm_id);
1985 1986
	spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);

1987 1988 1989 1990 1991
	return 0;

free_avic:
	avic_vm_destroy(kvm);
	return err;
A
Avi Kivity 已提交
1992 1993
}

1994 1995
static inline int
avic_update_iommu_vcpu_affinity(struct kvm_vcpu *vcpu, int cpu, bool r)
1996
{
1997 1998 1999
	int ret = 0;
	unsigned long flags;
	struct amd_svm_iommu_ir *ir;
2000 2001
	struct vcpu_svm *svm = to_svm(vcpu);

2002 2003
	if (!kvm_arch_has_assigned_device(vcpu->kvm))
		return 0;
2004

2005 2006 2007 2008 2009
	/*
	 * 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);
2010

2011 2012
	if (list_empty(&svm->ir_list))
		goto out;
2013

2014 2015 2016 2017 2018 2019 2020 2021
	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;
2022 2023 2024 2025 2026 2027
}

static void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
	u64 entry;
	/* ID = 0xff (broadcast), ID > 0xff (reserved) */
2028
	int h_physical_id = kvm_cpu_get_apicid(cpu);
2029 2030 2031 2032 2033
	struct vcpu_svm *svm = to_svm(vcpu);

	if (!kvm_vcpu_apicv_active(vcpu))
		return;

2034 2035 2036 2037 2038
	/*
	 * 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))
2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051
		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);
2052 2053
	avic_update_iommu_vcpu_affinity(vcpu, h_physical_id,
					svm->avic_is_running);
2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064
}

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));
2065 2066 2067
	if (entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK)
		avic_update_iommu_vcpu_affinity(vcpu, -1, 0);

2068 2069
	entry &= ~AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK;
	WRITE_ONCE(*(svm->avic_physical_id_cache), entry);
A
Avi Kivity 已提交
2070 2071
}

2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085
/**
 * 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);
}

2086
static void svm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event)
2087 2088
{
	struct vcpu_svm *svm = to_svm(vcpu);
2089 2090
	u32 dummy;
	u32 eax = 1;
2091

2092
	vcpu->arch.microcode_version = 0x01000065;
2093
	svm->spec_ctrl = 0;
2094
	svm->virt_spec_ctrl = 0;
2095

2096 2097 2098 2099 2100 2101
	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
2102
	init_vmcb(svm);
A
Avi Kivity 已提交
2103

2104
	kvm_cpuid(vcpu, &eax, &dummy, &dummy, &dummy, true);
2105
	kvm_rdx_write(vcpu, eax);
2106 2107 2108

	if (kvm_vcpu_apicv_active(vcpu) && !init_event)
		avic_update_vapic_bar(svm, APIC_DEFAULT_PHYS_BASE);
2109 2110
}

2111 2112 2113 2114
static int avic_init_vcpu(struct vcpu_svm *svm)
{
	int ret;

2115
	if (!kvm_vcpu_apicv_active(&svm->vcpu))
2116 2117 2118 2119 2120 2121 2122 2123
		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);
2124
	svm->dfr_reg = APIC_DFR_FLAT;
2125 2126 2127 2128

	return ret;
}

R
Rusty Russell 已提交
2129
static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
A
Avi Kivity 已提交
2130
{
2131
	struct vcpu_svm *svm;
A
Avi Kivity 已提交
2132
	struct page *page;
2133
	struct page *msrpm_pages;
A
Alexander Graf 已提交
2134
	struct page *hsave_page;
A
Alexander Graf 已提交
2135
	struct page *nested_msrpm_pages;
R
Rusty Russell 已提交
2136
	int err;
A
Avi Kivity 已提交
2137

2138 2139 2140
	BUILD_BUG_ON_MSG(offsetof(struct vcpu_svm, vcpu) != 0,
		"struct kvm_vcpu must be at offset 0 for arch usercopy region");

2141
	svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL_ACCOUNT);
R
Rusty Russell 已提交
2142 2143 2144 2145 2146
	if (!svm) {
		err = -ENOMEM;
		goto out;
	}

2147 2148 2149 2150 2151 2152 2153 2154
	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;
	}

2155 2156
	svm->vcpu.arch.guest_fpu = kmem_cache_zalloc(x86_fpu_cache,
						     GFP_KERNEL_ACCOUNT);
2157 2158 2159
	if (!svm->vcpu.arch.guest_fpu) {
		printk(KERN_ERR "kvm: failed to allocate vcpu's fpu\n");
		err = -ENOMEM;
2160
		goto free_user_fpu;
2161 2162
	}

R
Rusty Russell 已提交
2163 2164 2165 2166
	err = kvm_vcpu_init(&svm->vcpu, kvm, id);
	if (err)
		goto free_svm;

2167
	err = -ENOMEM;
2168
	page = alloc_page(GFP_KERNEL_ACCOUNT);
2169
	if (!page)
R
Rusty Russell 已提交
2170
		goto uninit;
A
Avi Kivity 已提交
2171

2172
	msrpm_pages = alloc_pages(GFP_KERNEL_ACCOUNT, MSRPM_ALLOC_ORDER);
2173
	if (!msrpm_pages)
2174
		goto free_page1;
A
Alexander Graf 已提交
2175

2176
	nested_msrpm_pages = alloc_pages(GFP_KERNEL_ACCOUNT, MSRPM_ALLOC_ORDER);
A
Alexander Graf 已提交
2177
	if (!nested_msrpm_pages)
2178
		goto free_page2;
2179

2180
	hsave_page = alloc_page(GFP_KERNEL_ACCOUNT);
A
Alexander Graf 已提交
2181
	if (!hsave_page)
2182 2183
		goto free_page3;

2184 2185 2186
	err = avic_init_vcpu(svm);
	if (err)
		goto free_page4;
2187

2188 2189 2190 2191 2192
	/* 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;

2193
	svm->nested.hsave = page_address(hsave_page);
A
Alexander Graf 已提交
2194

2195 2196 2197
	svm->msrpm = page_address(msrpm_pages);
	svm_vcpu_init_msrpm(svm->msrpm);

2198
	svm->nested.msrpm = page_address(nested_msrpm_pages);
2199
	svm_vcpu_init_msrpm(svm->nested.msrpm);
A
Alexander Graf 已提交
2200

2201 2202
	svm->vmcb = page_address(page);
	clear_page(svm->vmcb);
2203
	svm->vmcb_pa = __sme_set(page_to_pfn(page) << PAGE_SHIFT);
2204
	svm->asid_generation = 0;
P
Paolo Bonzini 已提交
2205
	init_vmcb(svm);
A
Avi Kivity 已提交
2206

2207 2208
	svm_init_osvw(&svm->vcpu);

R
Rusty Russell 已提交
2209
	return &svm->vcpu;
2210

2211 2212
free_page4:
	__free_page(hsave_page);
2213 2214 2215 2216 2217 2218
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
2219 2220 2221
uninit:
	kvm_vcpu_uninit(&svm->vcpu);
free_svm:
2222
	kmem_cache_free(x86_fpu_cache, svm->vcpu.arch.guest_fpu);
2223 2224
free_user_fpu:
	kmem_cache_free(x86_fpu_cache, svm->vcpu.arch.user_fpu);
2225
free_partial_svm:
2226
	kmem_cache_free(kvm_vcpu_cache, svm);
R
Rusty Russell 已提交
2227 2228
out:
	return ERR_PTR(err);
A
Avi Kivity 已提交
2229 2230
}

2231 2232 2233 2234 2235 2236 2237 2238
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
2239 2240
static void svm_free_vcpu(struct kvm_vcpu *vcpu)
{
2241 2242
	struct vcpu_svm *svm = to_svm(vcpu);

2243 2244 2245 2246 2247 2248 2249
	/*
	 * 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);

2250
	__free_page(pfn_to_page(__sme_clr(svm->vmcb_pa) >> PAGE_SHIFT));
2251
	__free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER);
2252 2253
	__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
2254
	kvm_vcpu_uninit(vcpu);
2255
	kmem_cache_free(x86_fpu_cache, svm->vcpu.arch.user_fpu);
2256
	kmem_cache_free(x86_fpu_cache, svm->vcpu.arch.guest_fpu);
2257
	kmem_cache_free(kvm_vcpu_cache, svm);
A
Avi Kivity 已提交
2258 2259
}

2260
static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
A
Avi Kivity 已提交
2261
{
2262
	struct vcpu_svm *svm = to_svm(vcpu);
A
Ashok Raj 已提交
2263
	struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
2264
	int i;
2265 2266

	if (unlikely(cpu != vcpu->cpu)) {
2267
		svm->asid_generation = 0;
2268
		mark_all_dirty(svm->vmcb);
2269
	}
2270

2271 2272 2273
#ifdef CONFIG_X86_64
	rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host.gs_base);
#endif
2274 2275 2276 2277
	savesegment(fs, svm->host.fs);
	savesegment(gs, svm->host.gs);
	svm->host.ldt = kvm_read_ldt();

2278
	for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
2279
		rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
2280

2281 2282 2283 2284 2285 2286
	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);
		}
2287
	}
P
Paolo Bonzini 已提交
2288 2289 2290
	/* This assumes that the kernel never uses MSR_TSC_AUX */
	if (static_cpu_has(X86_FEATURE_RDTSCP))
		wrmsrl(MSR_TSC_AUX, svm->tsc_aux);
2291

A
Ashok Raj 已提交
2292 2293 2294 2295
	if (sd->current_vmcb != svm->vmcb) {
		sd->current_vmcb = svm->vmcb;
		indirect_branch_prediction_barrier();
	}
2296
	avic_vcpu_load(vcpu, cpu);
A
Avi Kivity 已提交
2297 2298 2299 2300
}

static void svm_vcpu_put(struct kvm_vcpu *vcpu)
{
2301
	struct vcpu_svm *svm = to_svm(vcpu);
2302 2303
	int i;

2304 2305
	avic_vcpu_put(vcpu);

2306
	++vcpu->stat.host_state_reload;
2307 2308 2309
	kvm_load_ldt(svm->host.ldt);
#ifdef CONFIG_X86_64
	loadsegment(fs, svm->host.fs);
2310
	wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gsbase);
2311
	load_gs_index(svm->host.gs);
2312
#else
2313
#ifdef CONFIG_X86_32_LAZY_GS
2314
	loadsegment(gs, svm->host.gs);
2315
#endif
2316
#endif
2317
	for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
2318
		wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
A
Avi Kivity 已提交
2319 2320
}

2321 2322 2323 2324 2325 2326 2327 2328 2329 2330
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
2331 2332
static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
{
2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343
	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
2344 2345 2346 2347
}

static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
{
2348 2349 2350
	if (to_svm(vcpu)->nmi_singlestep)
		rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);

P
Paolo Bonzini 已提交
2351
       /*
A
Andrea Gelmini 已提交
2352
        * Any change of EFLAGS.VM is accompanied by a reload of SS
P
Paolo Bonzini 已提交
2353 2354 2355
        * (caused by either a task switch or an inter-privilege IRET),
        * so we do not need to update the CPL here.
        */
2356
	to_svm(vcpu)->vmcb->save.rflags = rflags;
A
Avi Kivity 已提交
2357 2358
}

A
Avi Kivity 已提交
2359 2360 2361 2362 2363
static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
{
	switch (reg) {
	case VCPU_EXREG_PDPTR:
		BUG_ON(!npt_enabled);
2364
		load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu));
A
Avi Kivity 已提交
2365 2366 2367 2368 2369 2370
		break;
	default:
		BUG();
	}
}

2371 2372
static void svm_set_vintr(struct vcpu_svm *svm)
{
2373
	set_intercept(svm, INTERCEPT_VINTR);
2374 2375 2376 2377
}

static void svm_clear_vintr(struct vcpu_svm *svm)
{
2378
	clr_intercept(svm, INTERCEPT_VINTR);
2379 2380
}

A
Avi Kivity 已提交
2381 2382
static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
{
2383
	struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
A
Avi Kivity 已提交
2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395

	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
2396
	return NULL;
A
Avi Kivity 已提交
2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420
}

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;
2421 2422 2423 2424 2425 2426 2427 2428 2429 2430

	/*
	 * 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;
2431

J
Joerg Roedel 已提交
2432 2433
	/*
	 * AMD's VMCB does not have an explicit unusable field, so emulate it
2434 2435
	 * for cross vendor migration purposes by "not present"
	 */
2436
	var->unusable = !var->present;
2437

2438 2439 2440 2441 2442 2443
	switch (seg) {
	case VCPU_SREG_TR:
		/*
		 * Work around a bug where the busy flag in the tr selector
		 * isn't exposed
		 */
2444
		var->type |= 0x2;
2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459
		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;
2460
	case VCPU_SREG_SS:
J
Joerg Roedel 已提交
2461 2462
		/*
		 * On AMD CPUs sometimes the DB bit in the segment
2463 2464 2465 2466 2467 2468
		 * 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;
2469
		/* This is symmetric with svm_set_segment() */
J
Jan Kiszka 已提交
2470
		var->dpl = to_svm(vcpu)->vmcb->save.cpl;
2471
		break;
2472
	}
A
Avi Kivity 已提交
2473 2474
}

2475 2476 2477 2478 2479 2480 2481
static int svm_get_cpl(struct kvm_vcpu *vcpu)
{
	struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;

	return save->cpl;
}

2482
static void svm_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2483
{
2484 2485
	struct vcpu_svm *svm = to_svm(vcpu);

2486 2487
	dt->size = svm->vmcb->save.idtr.limit;
	dt->address = svm->vmcb->save.idtr.base;
A
Avi Kivity 已提交
2488 2489
}

2490
static void svm_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2491
{
2492 2493
	struct vcpu_svm *svm = to_svm(vcpu);

2494 2495
	svm->vmcb->save.idtr.limit = dt->size;
	svm->vmcb->save.idtr.base = dt->address ;
2496
	mark_dirty(svm->vmcb, VMCB_DT);
A
Avi Kivity 已提交
2497 2498
}

2499
static void svm_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2500
{
2501 2502
	struct vcpu_svm *svm = to_svm(vcpu);

2503 2504
	dt->size = svm->vmcb->save.gdtr.limit;
	dt->address = svm->vmcb->save.gdtr.base;
A
Avi Kivity 已提交
2505 2506
}

2507
static void svm_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2508
{
2509 2510
	struct vcpu_svm *svm = to_svm(vcpu);

2511 2512
	svm->vmcb->save.gdtr.limit = dt->size;
	svm->vmcb->save.gdtr.base = dt->address ;
2513
	mark_dirty(svm->vmcb, VMCB_DT);
A
Avi Kivity 已提交
2514 2515
}

2516 2517 2518 2519
static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
{
}

2520 2521 2522 2523
static void svm_decache_cr3(struct kvm_vcpu *vcpu)
{
}

2524
static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
2525 2526 2527
{
}

A
Avi Kivity 已提交
2528 2529 2530 2531 2532
static void update_cr0_intercept(struct vcpu_svm *svm)
{
	ulong gcr0 = svm->vcpu.arch.cr0;
	u64 *hcr0 = &svm->vmcb->save.cr0;

2533 2534
	*hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK)
		| (gcr0 & SVM_CR0_SELECTIVE_MASK);
A
Avi Kivity 已提交
2535

2536
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
2537

2538
	if (gcr0 == *hcr0) {
2539 2540
		clr_cr_intercept(svm, INTERCEPT_CR0_READ);
		clr_cr_intercept(svm, INTERCEPT_CR0_WRITE);
A
Avi Kivity 已提交
2541
	} else {
2542 2543
		set_cr_intercept(svm, INTERCEPT_CR0_READ);
		set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
A
Avi Kivity 已提交
2544 2545 2546
	}
}

A
Avi Kivity 已提交
2547 2548
static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
{
2549 2550
	struct vcpu_svm *svm = to_svm(vcpu);

2551
#ifdef CONFIG_X86_64
2552
	if (vcpu->arch.efer & EFER_LME) {
2553
		if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
2554
			vcpu->arch.efer |= EFER_LMA;
2555
			svm->vmcb->save.efer |= EFER_LMA | EFER_LME;
A
Avi Kivity 已提交
2556 2557
		}

M
Mike Day 已提交
2558
		if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) {
2559
			vcpu->arch.efer &= ~EFER_LMA;
2560
			svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME);
A
Avi Kivity 已提交
2561 2562 2563
		}
	}
#endif
2564
	vcpu->arch.cr0 = cr0;
2565 2566 2567

	if (!npt_enabled)
		cr0 |= X86_CR0_PG | X86_CR0_WP;
2568

2569 2570 2571 2572 2573 2574 2575
	/*
	 * 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);
2576
	svm->vmcb->save.cr0 = cr0;
2577
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
2578
	update_cr0_intercept(svm);
A
Avi Kivity 已提交
2579 2580
}

2581
static int svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
A
Avi Kivity 已提交
2582
{
2583
	unsigned long host_cr4_mce = cr4_read_shadow() & X86_CR4_MCE;
2584 2585
	unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4;

2586 2587 2588
	if (cr4 & X86_CR4_VMXE)
		return 1;

2589
	if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE))
2590
		svm_flush_tlb(vcpu, true);
2591

2592 2593 2594
	vcpu->arch.cr4 = cr4;
	if (!npt_enabled)
		cr4 |= X86_CR4_PAE;
2595
	cr4 |= host_cr4_mce;
2596
	to_svm(vcpu)->vmcb->save.cr4 = cr4;
2597
	mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
2598
	return 0;
A
Avi Kivity 已提交
2599 2600 2601 2602 2603
}

static void svm_set_segment(struct kvm_vcpu *vcpu,
			    struct kvm_segment *var, int seg)
{
2604
	struct vcpu_svm *svm = to_svm(vcpu);
A
Avi Kivity 已提交
2605 2606 2607 2608 2609
	struct vmcb_seg *s = svm_seg(vcpu, seg);

	s->base = var->base;
	s->limit = var->limit;
	s->selector = var->selector;
2610 2611 2612 2613 2614 2615 2616 2617
	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
2618 2619 2620 2621 2622 2623 2624 2625

	/*
	 * 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)
2626 2627
		/* This is symmetric with svm_get_segment() */
		svm->vmcb->save.cpl = (var->dpl & 3);
A
Avi Kivity 已提交
2628

2629
	mark_dirty(svm->vmcb, VMCB_SEG);
A
Avi Kivity 已提交
2630 2631
}

2632
static void update_bp_intercept(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
2633
{
J
Jan Kiszka 已提交
2634 2635
	struct vcpu_svm *svm = to_svm(vcpu);

2636
	clr_exception_intercept(svm, BP_VECTOR);
2637

J
Jan Kiszka 已提交
2638 2639
	if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) {
		if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
2640
			set_exception_intercept(svm, BP_VECTOR);
J
Jan Kiszka 已提交
2641 2642
	} else
		vcpu->guest_debug = 0;
2643 2644
}

2645
static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd)
A
Avi Kivity 已提交
2646
{
2647 2648
	if (sd->next_asid > sd->max_asid) {
		++sd->asid_generation;
2649
		sd->next_asid = sd->min_asid;
2650
		svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
A
Avi Kivity 已提交
2651 2652
	}

2653 2654
	svm->asid_generation = sd->asid_generation;
	svm->vmcb->control.asid = sd->next_asid++;
2655 2656

	mark_dirty(svm->vmcb, VMCB_ASID);
A
Avi Kivity 已提交
2657 2658
}

J
Jan Kiszka 已提交
2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671
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);
}

2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686
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);
}

2687
static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value)
A
Avi Kivity 已提交
2688
{
2689 2690
	struct vcpu_svm *svm = to_svm(vcpu);

2691
	svm->vmcb->save.dr7 = value;
2692
	mark_dirty(svm->vmcb, VMCB_DR);
A
Avi Kivity 已提交
2693 2694
}

A
Avi Kivity 已提交
2695
static int pf_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2696
{
2697
	u64 fault_address = __sme_clr(svm->vmcb->control.exit_info_2);
2698
	u64 error_code = svm->vmcb->control.exit_info_1;
A
Avi Kivity 已提交
2699

2700
	return kvm_handle_page_fault(&svm->vcpu, error_code, fault_address,
2701 2702
			static_cpu_has(X86_FEATURE_DECODEASSISTS) ?
			svm->vmcb->control.insn_bytes : NULL,
2703 2704 2705 2706 2707
			svm->vmcb->control.insn_len);
}

static int npf_interception(struct vcpu_svm *svm)
{
2708
	u64 fault_address = __sme_clr(svm->vmcb->control.exit_info_2);
2709 2710 2711 2712
	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,
2713 2714
			static_cpu_has(X86_FEATURE_DECODEASSISTS) ?
			svm->vmcb->control.insn_bytes : NULL,
2715
			svm->vmcb->control.insn_len);
A
Avi Kivity 已提交
2716 2717
}

A
Avi Kivity 已提交
2718
static int db_interception(struct vcpu_svm *svm)
J
Jan Kiszka 已提交
2719
{
A
Avi Kivity 已提交
2720
	struct kvm_run *kvm_run = svm->vcpu.run;
2721
	struct kvm_vcpu *vcpu = &svm->vcpu;
A
Avi Kivity 已提交
2722

J
Jan Kiszka 已提交
2723
	if (!(svm->vcpu.guest_debug &
2724
	      (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) &&
J
Jan Kiszka 已提交
2725
		!svm->nmi_singlestep) {
J
Jan Kiszka 已提交
2726 2727 2728
		kvm_queue_exception(&svm->vcpu, DB_VECTOR);
		return 1;
	}
2729

J
Jan Kiszka 已提交
2730
	if (svm->nmi_singlestep) {
2731
		disable_nmi_singlestep(svm);
2732 2733
		/* Make sure we check for pending NMIs upon entry */
		kvm_make_request(KVM_REQ_EVENT, vcpu);
2734 2735 2736
	}

	if (svm->vcpu.guest_debug &
J
Joerg Roedel 已提交
2737
	    (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) {
2738 2739 2740 2741 2742 2743 2744 2745
		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
2746 2747
}

A
Avi Kivity 已提交
2748
static int bp_interception(struct vcpu_svm *svm)
J
Jan Kiszka 已提交
2749
{
A
Avi Kivity 已提交
2750 2751
	struct kvm_run *kvm_run = svm->vcpu.run;

J
Jan Kiszka 已提交
2752 2753 2754 2755 2756 2757
	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
2758
static int ud_interception(struct vcpu_svm *svm)
2759
{
W
Wanpeng Li 已提交
2760
	return handle_ud(&svm->vcpu);
2761 2762
}

2763 2764 2765 2766 2767 2768
static int ac_interception(struct vcpu_svm *svm)
{
	kvm_queue_exception_e(&svm->vcpu, AC_VECTOR, 0);
	return 1;
}

2769 2770 2771 2772 2773 2774 2775
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);

2776 2777 2778 2779 2780 2781 2782 2783
	/*
	 * 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;
	}
2784
	return kvm_emulate_instruction(vcpu, EMULTYPE_VMWARE_GP);
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 2825
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;
}

2826
static void svm_handle_mce(struct vcpu_svm *svm)
2827
{
2828 2829 2830 2831 2832 2833 2834
	if (is_erratum_383()) {
		/*
		 * Erratum 383 triggered. Guest state is corrupt so kill the
		 * guest.
		 */
		pr_err("KVM: Guest triggered AMD Erratum 383\n");

2835
		kvm_make_request(KVM_REQ_TRIPLE_FAULT, &svm->vcpu);
2836 2837 2838 2839

		return;
	}

2840 2841 2842 2843 2844 2845 2846 2847
	/*
	 * 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 */

2848 2849 2850 2851 2852
	return;
}

static int mc_interception(struct vcpu_svm *svm)
{
2853 2854 2855
	return 1;
}

A
Avi Kivity 已提交
2856
static int shutdown_interception(struct vcpu_svm *svm)
2857
{
A
Avi Kivity 已提交
2858 2859
	struct kvm_run *kvm_run = svm->vcpu.run;

2860 2861 2862 2863
	/*
	 * VMCB is undefined after a SHUTDOWN intercept
	 * so reinitialize it.
	 */
2864
	clear_page(svm->vmcb);
P
Paolo Bonzini 已提交
2865
	init_vmcb(svm);
2866 2867 2868 2869 2870

	kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
	return 0;
}

A
Avi Kivity 已提交
2871
static int io_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2872
{
2873
	struct kvm_vcpu *vcpu = &svm->vcpu;
M
Mike Day 已提交
2874
	u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */
2875
	int size, in, string;
2876
	unsigned port;
A
Avi Kivity 已提交
2877

R
Rusty Russell 已提交
2878
	++svm->vcpu.stat.io_exits;
2879
	string = (io_info & SVM_IOIO_STR_MASK) != 0;
2880
	in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
2881
	if (string)
2882
		return kvm_emulate_instruction(vcpu, 0);
2883

2884 2885
	port = io_info >> 16;
	size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
2886 2887
	svm->next_rip = svm->vmcb->control.exit_info_2;

2888
	return kvm_fast_pio(&svm->vcpu, size, port, in);
A
Avi Kivity 已提交
2889 2890
}

A
Avi Kivity 已提交
2891
static int nmi_interception(struct vcpu_svm *svm)
2892 2893 2894 2895
{
	return 1;
}

A
Avi Kivity 已提交
2896
static int intr_interception(struct vcpu_svm *svm)
2897 2898 2899 2900 2901
{
	++svm->vcpu.stat.irq_exits;
	return 1;
}

A
Avi Kivity 已提交
2902
static int nop_on_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2903 2904 2905 2906
{
	return 1;
}

A
Avi Kivity 已提交
2907
static int halt_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2908
{
R
Rusty Russell 已提交
2909
	return kvm_emulate_halt(&svm->vcpu);
A
Avi Kivity 已提交
2910 2911
}

A
Avi Kivity 已提交
2912
static int vmmcall_interception(struct vcpu_svm *svm)
2913
{
2914
	return kvm_emulate_hypercall(&svm->vcpu);
2915 2916
}

2917 2918 2919 2920 2921 2922 2923
static unsigned long nested_svm_get_tdp_cr3(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	return svm->nested.nested_cr3;
}

2924 2925 2926 2927 2928 2929 2930
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;

2931
	ret = kvm_vcpu_read_guest_page(vcpu, gpa_to_gfn(__sme_clr(cr3)), &pdpte,
2932
				       offset_in_page(cr3) + index * 8, 8);
2933 2934 2935 2936 2937
	if (ret)
		return 0;
	return pdpte;
}

2938 2939 2940 2941 2942
static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu,
				   unsigned long root)
{
	struct vcpu_svm *svm = to_svm(vcpu);

2943
	svm->vmcb->control.nested_cr3 = __sme_set(root);
2944
	mark_dirty(svm->vmcb, VMCB_NPT);
2945 2946
}

2947 2948
static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu,
				       struct x86_exception *fault)
2949 2950 2951
{
	struct vcpu_svm *svm = to_svm(vcpu);

2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971
	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;
2972 2973 2974 2975

	nested_svm_vmexit(svm);
}

2976
static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu)
2977
{
2978
	WARN_ON(mmu_is_nested(vcpu));
2979 2980

	vcpu->arch.mmu = &vcpu->arch.guest_mmu;
2981
	kvm_init_shadow_mmu(vcpu);
2982 2983 2984 2985 2986 2987
	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);
2988 2989 2990 2991 2992
	vcpu->arch.walk_mmu              = &vcpu->arch.nested_mmu;
}

static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu)
{
2993
	vcpu->arch.mmu = &vcpu->arch.root_mmu;
2994
	vcpu->arch.walk_mmu = &vcpu->arch.root_mmu;
2995 2996
}

2997 2998
static int nested_svm_check_permissions(struct vcpu_svm *svm)
{
2999 3000
	if (!(svm->vcpu.arch.efer & EFER_SVME) ||
	    !is_paging(&svm->vcpu)) {
3001 3002 3003 3004 3005 3006 3007 3008 3009
		kvm_queue_exception(&svm->vcpu, UD_VECTOR);
		return 1;
	}

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

3010
	return 0;
3011 3012
}

3013 3014 3015
static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
				      bool has_error_code, u32 error_code)
{
3016 3017
	int vmexit;

3018
	if (!is_guest_mode(&svm->vcpu))
3019
		return 0;
3020

3021 3022 3023 3024
	vmexit = nested_svm_intercept(svm);
	if (vmexit != NESTED_EXIT_DONE)
		return 0;

3025 3026 3027
	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;
3028 3029

	/*
3030 3031
	 * EXITINFO2 is undefined for all exception intercepts other
	 * than #PF.
3032
	 */
3033 3034
	if (svm->vcpu.arch.exception.nested_apf)
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.apf.nested_apf_token;
3035 3036
	else if (svm->vcpu.arch.exception.has_payload)
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.exception.payload;
3037 3038
	else
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2;
3039

3040
	svm->nested.exit_required = true;
3041
	return vmexit;
3042 3043
}

3044 3045
/* This function returns true if it is save to enable the irq window */
static inline bool nested_svm_intr(struct vcpu_svm *svm)
3046
{
3047
	if (!is_guest_mode(&svm->vcpu))
3048
		return true;
3049

3050
	if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
3051
		return true;
3052

3053
	if (!(svm->vcpu.arch.hflags & HF_HIF_MASK))
3054
		return false;
3055

3056 3057 3058 3059 3060 3061 3062 3063
	/*
	 * 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;

3064 3065 3066
	svm->vmcb->control.exit_code   = SVM_EXIT_INTR;
	svm->vmcb->control.exit_info_1 = 0;
	svm->vmcb->control.exit_info_2 = 0;
3067

3068 3069 3070
	if (svm->nested.intercept & 1ULL) {
		/*
		 * The #vmexit can't be emulated here directly because this
G
Guo Chao 已提交
3071
		 * code path runs with irqs and preemption disabled. A
3072 3073 3074 3075
		 * #vmexit emulation might sleep. Only signal request for
		 * the #vmexit here.
		 */
		svm->nested.exit_required = true;
3076
		trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip);
3077
		return false;
3078 3079
	}

3080
	return true;
3081 3082
}

3083 3084 3085
/* This function returns true if it is save to enable the nmi window */
static inline bool nested_svm_nmi(struct vcpu_svm *svm)
{
3086
	if (!is_guest_mode(&svm->vcpu))
3087 3088 3089 3090 3091 3092 3093 3094 3095
		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;
3096 3097
}

3098 3099
static int nested_svm_intercept_ioio(struct vcpu_svm *svm)
{
3100 3101 3102
	unsigned port, size, iopm_len;
	u16 val, mask;
	u8 start_bit;
3103
	u64 gpa;
3104

3105 3106
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_IOIO_PROT)))
		return NESTED_EXIT_HOST;
3107

3108
	port = svm->vmcb->control.exit_info_1 >> 16;
3109 3110
	size = (svm->vmcb->control.exit_info_1 & SVM_IOIO_SIZE_MASK) >>
		SVM_IOIO_SIZE_SHIFT;
3111
	gpa  = svm->nested.vmcb_iopm + (port / 8);
3112 3113 3114 3115
	start_bit = port % 8;
	iopm_len = (start_bit + size > 8) ? 2 : 1;
	mask = (0xf >> (4 - size)) << start_bit;
	val = 0;
3116

3117
	if (kvm_vcpu_read_guest(&svm->vcpu, gpa, &val, iopm_len))
3118
		return NESTED_EXIT_DONE;
3119

3120
	return (val & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
3121 3122
}

3123
static int nested_svm_exit_handled_msr(struct vcpu_svm *svm)
3124
{
3125 3126
	u32 offset, msr, value;
	int write, mask;
3127

3128
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
3129
		return NESTED_EXIT_HOST;
3130

3131 3132 3133 3134
	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);
3135

3136 3137
	if (offset == MSR_INVALID)
		return NESTED_EXIT_DONE;
3138

3139 3140
	/* Offset is in 32 bit units but need in 8 bit units */
	offset *= 4;
3141

3142
	if (kvm_vcpu_read_guest(&svm->vcpu, svm->nested.vmcb_msrpm + offset, &value, 4))
3143
		return NESTED_EXIT_DONE;
3144

3145
	return (value & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
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 3172
/* 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;
}

3173
static int nested_svm_exit_special(struct vcpu_svm *svm)
3174 3175
{
	u32 exit_code = svm->vmcb->control.exit_code;
3176

3177 3178 3179
	switch (exit_code) {
	case SVM_EXIT_INTR:
	case SVM_EXIT_NMI:
3180
	case SVM_EXIT_EXCP_BASE + MC_VECTOR:
3181 3182
		return NESTED_EXIT_HOST;
	case SVM_EXIT_NPF:
J
Joerg Roedel 已提交
3183
		/* For now we are always handling NPFs when using them */
3184 3185 3186 3187
		if (npt_enabled)
			return NESTED_EXIT_HOST;
		break;
	case SVM_EXIT_EXCP_BASE + PF_VECTOR:
G
Gleb Natapov 已提交
3188
		/* When we're shadowing, trap PFs, but not async PF */
3189
		if (!npt_enabled && svm->vcpu.arch.apf.host_apf_reason == 0)
3190 3191 3192 3193
			return NESTED_EXIT_HOST;
		break;
	default:
		break;
3194 3195
	}

3196 3197 3198 3199 3200 3201
	return NESTED_EXIT_CONTINUE;
}

/*
 * If this function returns true, this #vmexit was already handled
 */
3202
static int nested_svm_intercept(struct vcpu_svm *svm)
3203 3204 3205 3206
{
	u32 exit_code = svm->vmcb->control.exit_code;
	int vmexit = NESTED_EXIT_HOST;

3207
	switch (exit_code) {
3208
	case SVM_EXIT_MSR:
3209
		vmexit = nested_svm_exit_handled_msr(svm);
3210
		break;
3211 3212 3213
	case SVM_EXIT_IOIO:
		vmexit = nested_svm_intercept_ioio(svm);
		break;
3214 3215 3216
	case SVM_EXIT_READ_CR0 ... SVM_EXIT_WRITE_CR8: {
		u32 bit = 1U << (exit_code - SVM_EXIT_READ_CR0);
		if (svm->nested.intercept_cr & bit)
3217
			vmexit = NESTED_EXIT_DONE;
3218 3219
		break;
	}
3220 3221 3222
	case SVM_EXIT_READ_DR0 ... SVM_EXIT_WRITE_DR7: {
		u32 bit = 1U << (exit_code - SVM_EXIT_READ_DR0);
		if (svm->nested.intercept_dr & bit)
3223
			vmexit = NESTED_EXIT_DONE;
3224 3225 3226 3227
		break;
	}
	case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: {
		u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE);
3228 3229 3230 3231 3232 3233
		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
3234 3235
		/* async page fault always cause vmexit */
		else if ((exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) &&
3236
			 svm->vcpu.arch.exception.nested_apf != 0)
G
Gleb Natapov 已提交
3237
			vmexit = NESTED_EXIT_DONE;
3238 3239
		break;
	}
3240 3241 3242 3243
	case SVM_EXIT_ERR: {
		vmexit = NESTED_EXIT_DONE;
		break;
	}
3244 3245
	default: {
		u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR);
J
Joerg Roedel 已提交
3246
		if (svm->nested.intercept & exit_bits)
3247
			vmexit = NESTED_EXIT_DONE;
3248 3249 3250
	}
	}

3251 3252 3253 3254 3255 3256 3257 3258 3259 3260
	return vmexit;
}

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

	vmexit = nested_svm_intercept(svm);

	if (vmexit == NESTED_EXIT_DONE)
3261 3262 3263
		nested_svm_vmexit(svm);

	return vmexit;
3264 3265
}

3266 3267 3268 3269 3270
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;

3271
	dst->intercept_cr         = from->intercept_cr;
3272
	dst->intercept_dr         = from->intercept_dr;
3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292
	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;
3293
	dst->virt_ext              = from->virt_ext;
3294 3295
	dst->pause_filter_count   = from->pause_filter_count;
	dst->pause_filter_thresh  = from->pause_filter_thresh;
3296 3297
}

3298
static int nested_svm_vmexit(struct vcpu_svm *svm)
3299
{
3300
	int rc;
3301
	struct vmcb *nested_vmcb;
3302
	struct vmcb *hsave = svm->nested.hsave;
J
Joerg Roedel 已提交
3303
	struct vmcb *vmcb = svm->vmcb;
3304
	struct kvm_host_map map;
3305

3306 3307 3308 3309
	trace_kvm_nested_vmexit_inject(vmcb->control.exit_code,
				       vmcb->control.exit_info_1,
				       vmcb->control.exit_info_2,
				       vmcb->control.exit_int_info,
3310 3311
				       vmcb->control.exit_int_info_err,
				       KVM_ISA_SVM);
3312

3313
	rc = kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(svm->nested.vmcb), &map);
3314 3315 3316
	if (rc) {
		if (rc == -EINVAL)
			kvm_inject_gp(&svm->vcpu, 0);
3317
		return 1;
3318 3319 3320
	}

	nested_vmcb = map.hva;
3321

3322 3323
	/* Exit Guest-Mode */
	leave_guest_mode(&svm->vcpu);
3324 3325
	svm->nested.vmcb = 0;

3326
	/* Give the current vmcb to the guest */
J
Joerg Roedel 已提交
3327 3328 3329 3330 3331 3332 3333 3334
	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;
3335
	nested_vmcb->save.efer   = svm->vcpu.arch.efer;
3336
	nested_vmcb->save.cr0    = kvm_read_cr0(&svm->vcpu);
3337
	nested_vmcb->save.cr3    = kvm_read_cr3(&svm->vcpu);
J
Joerg Roedel 已提交
3338
	nested_vmcb->save.cr2    = vmcb->save.cr2;
3339
	nested_vmcb->save.cr4    = svm->vcpu.arch.cr4;
3340
	nested_vmcb->save.rflags = kvm_get_rflags(&svm->vcpu);
J
Joerg Roedel 已提交
3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356
	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;
3357 3358 3359

	if (svm->nrips_enabled)
		nested_vmcb->control.next_rip  = vmcb->control.next_rip;
3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375

	/*
	 * 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
3376 3377 3378
	nested_vmcb->control.tlb_ctl           = 0;
	nested_vmcb->control.event_inj         = 0;
	nested_vmcb->control.event_inj_err     = 0;
3379

3380 3381 3382 3383 3384
	nested_vmcb->control.pause_filter_count =
		svm->vmcb->control.pause_filter_count;
	nested_vmcb->control.pause_filter_thresh =
		svm->vmcb->control.pause_filter_thresh;

3385 3386 3387 3388 3389
	/* 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 */
3390
	copy_vmcb_control_area(vmcb, hsave);
3391

3392
	svm->vcpu.arch.tsc_offset = svm->vmcb->control.tsc_offset;
3393 3394
	kvm_clear_exception_queue(&svm->vcpu);
	kvm_clear_interrupt_queue(&svm->vcpu);
3395

3396 3397
	svm->nested.nested_cr3 = 0;

3398 3399 3400 3401 3402 3403 3404
	/* 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;
3405
	kvm_set_rflags(&svm->vcpu, hsave->save.rflags);
3406 3407 3408 3409 3410 3411 3412
	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 {
3413
		(void)kvm_set_cr3(&svm->vcpu, hsave->save.cr3);
3414
	}
3415
	kvm_rax_write(&svm->vcpu, hsave->save.rax);
3416 3417
	kvm_rsp_write(&svm->vcpu, hsave->save.rsp);
	kvm_rip_write(&svm->vcpu, hsave->save.rip);
3418 3419 3420 3421
	svm->vmcb->save.dr7 = 0;
	svm->vmcb->save.cpl = 0;
	svm->vmcb->control.exit_int_info = 0;

3422 3423
	mark_all_dirty(svm->vmcb);

3424
	kvm_vcpu_unmap(&svm->vcpu, &map, true);
3425

3426
	nested_svm_uninit_mmu_context(&svm->vcpu);
3427 3428 3429
	kvm_mmu_reset_context(&svm->vcpu);
	kvm_mmu_load(&svm->vcpu);

3430 3431 3432 3433 3434 3435 3436 3437
	/*
	 * 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);

3438 3439
	return 0;
}
A
Alexander Graf 已提交
3440

3441
static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3442
{
3443 3444
	/*
	 * This function merges the msr permission bitmaps of kvm and the
G
Guo Chao 已提交
3445
	 * nested vmcb. It is optimized in that it only merges the parts where
3446 3447
	 * the kvm msr permission bitmap may contain zero bits
	 */
A
Alexander Graf 已提交
3448
	int i;
3449

3450 3451
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
		return true;
3452

3453 3454 3455
	for (i = 0; i < MSRPM_OFFSETS; i++) {
		u32 value, p;
		u64 offset;
3456

3457 3458
		if (msrpm_offsets[i] == 0xffffffff)
			break;
A
Alexander Graf 已提交
3459

3460 3461
		p      = msrpm_offsets[i];
		offset = svm->nested.vmcb_msrpm + (p * 4);
3462

3463
		if (kvm_vcpu_read_guest(&svm->vcpu, offset, &value, 4))
3464 3465 3466 3467
			return false;

		svm->nested.msrpm[p] = svm->msrpm[p] | value;
	}
A
Alexander Graf 已提交
3468

3469
	svm->vmcb->control.msrpm_base_pa = __sme_set(__pa(svm->nested.msrpm));
3470 3471

	return true;
A
Alexander Graf 已提交
3472 3473
}

3474 3475 3476 3477 3478
static bool nested_vmcb_checks(struct vmcb *vmcb)
{
	if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0)
		return false;

3479 3480 3481
	if (vmcb->control.asid == 0)
		return false;

3482 3483
	if ((vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) &&
	    !npt_enabled)
3484 3485
		return false;

3486 3487 3488
	return true;
}

L
Ladi Prosek 已提交
3489
static void enter_svm_guest_mode(struct vcpu_svm *svm, u64 vmcb_gpa,
3490
				 struct vmcb *nested_vmcb, struct kvm_host_map *map)
A
Alexander Graf 已提交
3491
{
3492
	if (kvm_get_rflags(&svm->vcpu) & X86_EFLAGS_IF)
A
Alexander Graf 已提交
3493 3494 3495 3496
		svm->vcpu.arch.hflags |= HF_HIF_MASK;
	else
		svm->vcpu.arch.hflags &= ~HF_HIF_MASK;

3497
	if (nested_vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) {
3498 3499 3500 3501
		svm->nested.nested_cr3 = nested_vmcb->control.nested_cr3;
		nested_svm_init_mmu_context(&svm->vcpu);
	}

A
Alexander Graf 已提交
3502 3503 3504 3505 3506 3507 3508
	/* 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;
3509
	kvm_set_rflags(&svm->vcpu, nested_vmcb->save.rflags);
A
Alexander Graf 已提交
3510 3511 3512 3513 3514 3515
	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;
3516
	} else
3517
		(void)kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3);
3518 3519 3520 3521

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

J
Joerg Roedel 已提交
3522
	svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2;
3523
	kvm_rax_write(&svm->vcpu, nested_vmcb->save.rax);
3524 3525
	kvm_rsp_write(&svm->vcpu, nested_vmcb->save.rsp);
	kvm_rip_write(&svm->vcpu, nested_vmcb->save.rip);
J
Joerg Roedel 已提交
3526

A
Alexander Graf 已提交
3527 3528 3529 3530 3531 3532 3533 3534
	/* 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;

3535
	svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa & ~0x0fffULL;
3536
	svm->nested.vmcb_iopm  = nested_vmcb->control.iopm_base_pa  & ~0x0fffULL;
A
Alexander Graf 已提交
3537

J
Joerg Roedel 已提交
3538
	/* cache intercepts */
3539
	svm->nested.intercept_cr         = nested_vmcb->control.intercept_cr;
3540
	svm->nested.intercept_dr         = nested_vmcb->control.intercept_dr;
J
Joerg Roedel 已提交
3541 3542 3543
	svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions;
	svm->nested.intercept            = nested_vmcb->control.intercept;

3544
	svm_flush_tlb(&svm->vcpu, true);
A
Alexander Graf 已提交
3545 3546 3547 3548 3549 3550
	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;

3551 3552
	if (svm->vcpu.arch.hflags & HF_VINTR_MASK) {
		/* We only want the cr8 intercept bits of the guest */
3553 3554
		clr_cr_intercept(svm, INTERCEPT_CR8_READ);
		clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
3555 3556
	}

3557
	/* We don't want to see VMMCALLs from a nested guest */
3558
	clr_intercept(svm, INTERCEPT_VMMCALL);
3559

3560 3561 3562
	svm->vcpu.arch.tsc_offset += nested_vmcb->control.tsc_offset;
	svm->vmcb->control.tsc_offset = svm->vcpu.arch.tsc_offset;

3563
	svm->vmcb->control.virt_ext = nested_vmcb->control.virt_ext;
A
Alexander Graf 已提交
3564 3565 3566 3567 3568
	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;

3569 3570 3571 3572 3573
	svm->vmcb->control.pause_filter_count =
		nested_vmcb->control.pause_filter_count;
	svm->vmcb->control.pause_filter_thresh =
		nested_vmcb->control.pause_filter_thresh;

3574
	kvm_vcpu_unmap(&svm->vcpu, map, true);
3575

3576 3577 3578
	/* Enter Guest-Mode */
	enter_guest_mode(&svm->vcpu);

3579 3580 3581 3582 3583 3584
	/*
	 * Merge guest and host intercepts - must be called  with vcpu in
	 * guest-mode to take affect here
	 */
	recalc_intercepts(svm);

3585
	svm->nested.vmcb = vmcb_gpa;
3586

3587
	enable_gif(svm);
A
Alexander Graf 已提交
3588

3589
	mark_all_dirty(svm->vmcb);
L
Ladi Prosek 已提交
3590 3591
}

3592
static int nested_svm_vmrun(struct vcpu_svm *svm)
L
Ladi Prosek 已提交
3593
{
3594
	int ret;
L
Ladi Prosek 已提交
3595 3596 3597
	struct vmcb *nested_vmcb;
	struct vmcb *hsave = svm->nested.hsave;
	struct vmcb *vmcb = svm->vmcb;
3598
	struct kvm_host_map map;
L
Ladi Prosek 已提交
3599 3600 3601 3602
	u64 vmcb_gpa;

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

3603
	ret = kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(vmcb_gpa), &map);
3604
	if (ret == -EINVAL) {
3605
		kvm_inject_gp(&svm->vcpu, 0);
3606
		return 1;
3607 3608
	} else if (ret) {
		return kvm_skip_emulated_instruction(&svm->vcpu);
3609 3610
	}

3611 3612
	ret = kvm_skip_emulated_instruction(&svm->vcpu);

3613
	nested_vmcb = map.hva;
L
Ladi Prosek 已提交
3614 3615 3616 3617 3618 3619 3620

	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;

3621
		kvm_vcpu_unmap(&svm->vcpu, &map, true);
L
Ladi Prosek 已提交
3622

3623
		return ret;
L
Ladi Prosek 已提交
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 3664
	}

	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);

3665
	enter_svm_guest_mode(svm, vmcb_gpa, nested_vmcb, &map);
3666

3667 3668 3669 3670 3671 3672 3673 3674 3675
	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);
	}

3676
	return ret;
A
Alexander Graf 已提交
3677 3678
}

3679
static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694
{
	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
3695
static int vmload_interception(struct vcpu_svm *svm)
3696
{
3697
	struct vmcb *nested_vmcb;
3698
	struct kvm_host_map map;
3699
	int ret;
3700

3701 3702 3703
	if (nested_svm_check_permissions(svm))
		return 1;

3704 3705 3706 3707
	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);
3708
		return 1;
3709 3710 3711
	}

	nested_vmcb = map.hva;
3712

3713
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3714

3715
	nested_svm_vmloadsave(nested_vmcb, svm->vmcb);
3716
	kvm_vcpu_unmap(&svm->vcpu, &map, true);
3717

3718
	return ret;
3719 3720
}

A
Avi Kivity 已提交
3721
static int vmsave_interception(struct vcpu_svm *svm)
3722
{
3723
	struct vmcb *nested_vmcb;
3724
	struct kvm_host_map map;
3725
	int ret;
3726

3727 3728 3729
	if (nested_svm_check_permissions(svm))
		return 1;

3730 3731 3732 3733
	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);
3734
		return 1;
3735 3736 3737
	}

	nested_vmcb = map.hva;
3738

3739
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3740

3741
	nested_svm_vmloadsave(svm->vmcb, nested_vmcb);
3742
	kvm_vcpu_unmap(&svm->vcpu, &map, true);
3743

3744
	return ret;
3745 3746
}

A
Avi Kivity 已提交
3747
static int vmrun_interception(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3748 3749 3750 3751
{
	if (nested_svm_check_permissions(svm))
		return 1;

3752
	return nested_svm_vmrun(svm);
A
Alexander Graf 已提交
3753 3754
}

A
Avi Kivity 已提交
3755
static int stgi_interception(struct vcpu_svm *svm)
3756
{
3757 3758
	int ret;

3759 3760 3761
	if (nested_svm_check_permissions(svm))
		return 1;

3762 3763
	/*
	 * If VGIF is enabled, the STGI intercept is only added to
3764
	 * detect the opening of the SMI/NMI window; remove it now.
3765 3766 3767 3768
	 */
	if (vgif_enabled(svm))
		clr_intercept(svm, INTERCEPT_STGI);

3769
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3770
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3771

3772
	enable_gif(svm);
3773

3774
	return ret;
3775 3776
}

A
Avi Kivity 已提交
3777
static int clgi_interception(struct vcpu_svm *svm)
3778
{
3779 3780
	int ret;

3781 3782 3783
	if (nested_svm_check_permissions(svm))
		return 1;

3784
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3785

3786
	disable_gif(svm);
3787 3788

	/* After a CLGI no interrupts should come */
3789 3790 3791 3792 3793
	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);
	}
3794

3795
	return ret;
3796 3797
}

A
Avi Kivity 已提交
3798
static int invlpga_interception(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3799 3800 3801
{
	struct kvm_vcpu *vcpu = &svm->vcpu;

3802 3803
	trace_kvm_invlpga(svm->vmcb->save.rip, kvm_rcx_read(&svm->vcpu),
			  kvm_rax_read(&svm->vcpu));
3804

A
Alexander Graf 已提交
3805
	/* Let's treat INVLPGA the same as INVLPG (can be optimized!) */
3806
	kvm_mmu_invlpg(vcpu, kvm_rax_read(&svm->vcpu));
A
Alexander Graf 已提交
3807

3808
	return kvm_skip_emulated_instruction(&svm->vcpu);
A
Alexander Graf 已提交
3809 3810
}

3811 3812
static int skinit_interception(struct vcpu_svm *svm)
{
3813
	trace_kvm_skinit(svm->vmcb->save.rip, kvm_rax_read(&svm->vcpu));
3814 3815 3816 3817 3818

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

D
David Kaplan 已提交
3819 3820
static int wbinvd_interception(struct vcpu_svm *svm)
{
3821
	return kvm_emulate_wbinvd(&svm->vcpu);
D
David Kaplan 已提交
3822 3823
}

J
Joerg Roedel 已提交
3824 3825 3826
static int xsetbv_interception(struct vcpu_svm *svm)
{
	u64 new_bv = kvm_read_edx_eax(&svm->vcpu);
3827
	u32 index = kvm_rcx_read(&svm->vcpu);
J
Joerg Roedel 已提交
3828 3829

	if (kvm_set_xcr(&svm->vcpu, index, new_bv) == 0) {
3830
		return kvm_skip_emulated_instruction(&svm->vcpu);
J
Joerg Roedel 已提交
3831 3832 3833 3834 3835
	}

	return 1;
}

J
Jim Mattson 已提交
3836 3837 3838 3839 3840 3841
static int rdpru_interception(struct vcpu_svm *svm)
{
	kvm_queue_exception(&svm->vcpu, UD_VECTOR);
	return 1;
}

A
Avi Kivity 已提交
3842
static int task_switch_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3843
{
3844
	u16 tss_selector;
3845 3846 3847
	int reason;
	int int_type = svm->vmcb->control.exit_int_info &
		SVM_EXITINTINFO_TYPE_MASK;
3848
	int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK;
3849 3850 3851 3852
	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;
3853 3854
	bool has_error_code = false;
	u32 error_code = 0;
3855 3856

	tss_selector = (u16)svm->vmcb->control.exit_info_1;
3857

3858 3859
	if (svm->vmcb->control.exit_info_2 &
	    (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET))
3860 3861 3862 3863
		reason = TASK_SWITCH_IRET;
	else if (svm->vmcb->control.exit_info_2 &
		 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP))
		reason = TASK_SWITCH_JMP;
3864
	else if (idt_v)
3865 3866 3867 3868
		reason = TASK_SWITCH_GATE;
	else
		reason = TASK_SWITCH_CALL;

3869 3870 3871 3872 3873 3874
	if (reason == TASK_SWITCH_GATE) {
		switch (type) {
		case SVM_EXITINTINFO_TYPE_NMI:
			svm->vcpu.arch.nmi_injected = false;
			break;
		case SVM_EXITINTINFO_TYPE_EXEPT:
3875 3876 3877 3878 3879 3880
			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;
			}
3881 3882 3883 3884 3885 3886 3887 3888 3889
			kvm_clear_exception_queue(&svm->vcpu);
			break;
		case SVM_EXITINTINFO_TYPE_INTR:
			kvm_clear_interrupt_queue(&svm->vcpu);
			break;
		default:
			break;
		}
	}
3890

3891 3892 3893
	if (reason != TASK_SWITCH_GATE ||
	    int_type == SVM_EXITINTINFO_TYPE_SOFT ||
	    (int_type == SVM_EXITINTINFO_TYPE_EXEPT &&
3894
	     (int_vec == OF_VECTOR || int_vec == BP_VECTOR))) {
3895
		if (!skip_emulated_instruction(&svm->vcpu))
3896
			return 0;
3897
	}
3898

3899 3900 3901
	if (int_type != SVM_EXITINTINFO_TYPE_SOFT)
		int_vec = -1;

3902
	return kvm_task_switch(&svm->vcpu, tss_selector, int_vec, reason,
3903
			       has_error_code, error_code);
A
Avi Kivity 已提交
3904 3905
}

A
Avi Kivity 已提交
3906
static int cpuid_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3907
{
3908
	return kvm_emulate_cpuid(&svm->vcpu);
A
Avi Kivity 已提交
3909 3910
}

A
Avi Kivity 已提交
3911
static int iret_interception(struct vcpu_svm *svm)
3912 3913
{
	++svm->vcpu.stat.nmi_window_exits;
3914
	clr_intercept(svm, INTERCEPT_IRET);
3915
	svm->vcpu.arch.hflags |= HF_IRET_MASK;
3916
	svm->nmi_iret_rip = kvm_rip_read(&svm->vcpu);
3917
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3918 3919 3920
	return 1;
}

A
Avi Kivity 已提交
3921
static int invlpg_interception(struct vcpu_svm *svm)
M
Marcelo Tosatti 已提交
3922
{
3923
	if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
3924
		return kvm_emulate_instruction(&svm->vcpu, 0);
3925 3926

	kvm_mmu_invlpg(&svm->vcpu, svm->vmcb->control.exit_info_1);
3927
	return kvm_skip_emulated_instruction(&svm->vcpu);
M
Marcelo Tosatti 已提交
3928 3929
}

A
Avi Kivity 已提交
3930
static int emulate_on_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3931
{
3932
	return kvm_emulate_instruction(&svm->vcpu, 0);
A
Avi Kivity 已提交
3933 3934
}

B
Brijesh Singh 已提交
3935 3936
static int rsm_interception(struct vcpu_svm *svm)
{
3937
	return kvm_emulate_instruction_from_buffer(&svm->vcpu, rsm_ins_bytes, 2);
B
Brijesh Singh 已提交
3938 3939
}

A
Avi Kivity 已提交
3940 3941 3942 3943
static int rdpmc_interception(struct vcpu_svm *svm)
{
	int err;

3944
	if (!nrips)
A
Avi Kivity 已提交
3945 3946 3947
		return emulate_on_interception(svm);

	err = kvm_rdpmc(&svm->vcpu);
3948
	return kvm_complete_insn_gp(&svm->vcpu, err);
A
Avi Kivity 已提交
3949 3950
}

3951 3952
static bool check_selective_cr0_intercepted(struct vcpu_svm *svm,
					    unsigned long val)
3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974
{
	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;
}

3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989
#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;
3990 3991 3992 3993
	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;
3994 3995 3996 3997 3998 3999 4000

	err = 0;
	if (cr >= 16) { /* mov to cr */
		cr -= 16;
		val = kvm_register_read(&svm->vcpu, reg);
		switch (cr) {
		case 0:
4001 4002
			if (!check_selective_cr0_intercepted(svm, val))
				err = kvm_set_cr0(&svm->vcpu, val);
4003 4004 4005
			else
				return 1;

4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029
			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:
4030
			val = kvm_read_cr3(&svm->vcpu);
4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044
			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);
	}
4045
	return kvm_complete_insn_gp(&svm->vcpu, err);
4046 4047
}

4048 4049 4050 4051 4052
static int dr_interception(struct vcpu_svm *svm)
{
	int reg, dr;
	unsigned long val;

4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063
	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;
	}

4064 4065 4066 4067 4068 4069 4070
	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 */
4071 4072
		if (!kvm_require_dr(&svm->vcpu, dr - 16))
			return 1;
4073 4074 4075
		val = kvm_register_read(&svm->vcpu, reg);
		kvm_set_dr(&svm->vcpu, dr - 16, val);
	} else {
4076 4077 4078 4079
		if (!kvm_require_dr(&svm->vcpu, dr))
			return 1;
		kvm_get_dr(&svm->vcpu, dr, &val);
		kvm_register_write(&svm->vcpu, reg, val);
4080 4081
	}

4082
	return kvm_skip_emulated_instruction(&svm->vcpu);
4083 4084
}

A
Avi Kivity 已提交
4085
static int cr8_write_interception(struct vcpu_svm *svm)
4086
{
A
Avi Kivity 已提交
4087
	struct kvm_run *kvm_run = svm->vcpu.run;
A
Andre Przywara 已提交
4088
	int r;
A
Avi Kivity 已提交
4089

4090 4091
	u8 cr8_prev = kvm_get_cr8(&svm->vcpu);
	/* instruction emulation calls kvm_set_cr8() */
4092
	r = cr_interception(svm);
4093
	if (lapic_in_kernel(&svm->vcpu))
4094
		return r;
4095
	if (cr8_prev <= kvm_get_cr8(&svm->vcpu))
4096
		return r;
4097 4098 4099 4100
	kvm_run->exit_reason = KVM_EXIT_SET_TPR;
	return 0;
}

4101 4102
static int svm_get_msr_feature(struct kvm_msr_entry *msr)
{
4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114
	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;
4115 4116
}

4117
static int svm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
A
Avi Kivity 已提交
4118
{
4119 4120
	struct vcpu_svm *svm = to_svm(vcpu);

4121
	switch (msr_info->index) {
B
Brian Gerst 已提交
4122
	case MSR_STAR:
4123
		msr_info->data = svm->vmcb->save.star;
A
Avi Kivity 已提交
4124
		break;
4125
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
4126
	case MSR_LSTAR:
4127
		msr_info->data = svm->vmcb->save.lstar;
A
Avi Kivity 已提交
4128 4129
		break;
	case MSR_CSTAR:
4130
		msr_info->data = svm->vmcb->save.cstar;
A
Avi Kivity 已提交
4131 4132
		break;
	case MSR_KERNEL_GS_BASE:
4133
		msr_info->data = svm->vmcb->save.kernel_gs_base;
A
Avi Kivity 已提交
4134 4135
		break;
	case MSR_SYSCALL_MASK:
4136
		msr_info->data = svm->vmcb->save.sfmask;
A
Avi Kivity 已提交
4137 4138 4139
		break;
#endif
	case MSR_IA32_SYSENTER_CS:
4140
		msr_info->data = svm->vmcb->save.sysenter_cs;
A
Avi Kivity 已提交
4141 4142
		break;
	case MSR_IA32_SYSENTER_EIP:
4143
		msr_info->data = svm->sysenter_eip;
A
Avi Kivity 已提交
4144 4145
		break;
	case MSR_IA32_SYSENTER_ESP:
4146
		msr_info->data = svm->sysenter_esp;
A
Avi Kivity 已提交
4147
		break;
P
Paolo Bonzini 已提交
4148 4149 4150 4151 4152
	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
4153 4154 4155 4156 4157
	/*
	 * 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.
	 */
4158
	case MSR_IA32_DEBUGCTLMSR:
4159
		msr_info->data = svm->vmcb->save.dbgctl;
4160 4161
		break;
	case MSR_IA32_LASTBRANCHFROMIP:
4162
		msr_info->data = svm->vmcb->save.br_from;
4163 4164
		break;
	case MSR_IA32_LASTBRANCHTOIP:
4165
		msr_info->data = svm->vmcb->save.br_to;
4166 4167
		break;
	case MSR_IA32_LASTINTFROMIP:
4168
		msr_info->data = svm->vmcb->save.last_excp_from;
4169 4170
		break;
	case MSR_IA32_LASTINTTOIP:
4171
		msr_info->data = svm->vmcb->save.last_excp_to;
4172
		break;
A
Alexander Graf 已提交
4173
	case MSR_VM_HSAVE_PA:
4174
		msr_info->data = svm->nested.hsave_msr;
A
Alexander Graf 已提交
4175
		break;
4176
	case MSR_VM_CR:
4177
		msr_info->data = svm->nested.vm_cr_msr;
4178
		break;
4179 4180
	case MSR_IA32_SPEC_CTRL:
		if (!msr_info->host_initiated &&
4181 4182
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBRS) &&
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_SSBD))
4183 4184 4185 4186
			return 1;

		msr_info->data = svm->spec_ctrl;
		break;
4187 4188 4189 4190 4191 4192 4193
	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;
4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210
	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;
4211 4212 4213
	case MSR_F10H_DECFG:
		msr_info->data = svm->msr_decfg;
		break;
A
Avi Kivity 已提交
4214
	default:
4215
		return kvm_get_msr_common(vcpu, msr_info);
A
Avi Kivity 已提交
4216 4217 4218 4219
	}
	return 0;
}

A
Avi Kivity 已提交
4220
static int rdmsr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4221
{
4222
	return kvm_emulate_rdmsr(&svm->vcpu);
A
Avi Kivity 已提交
4223 4224
}

4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249
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;
}

4250
static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
A
Avi Kivity 已提交
4251
{
4252 4253
	struct vcpu_svm *svm = to_svm(vcpu);

4254 4255
	u32 ecx = msr->index;
	u64 data = msr->data;
A
Avi Kivity 已提交
4256
	switch (ecx) {
P
Paolo Bonzini 已提交
4257 4258 4259 4260 4261 4262 4263
	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;
4264 4265
	case MSR_IA32_SPEC_CTRL:
		if (!msr->host_initiated &&
4266 4267
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBRS) &&
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_SSBD))
4268 4269 4270
			return 1;

		/* The STIBP bit doesn't fault even if it's not advertised */
4271
		if (data & ~(SPEC_CTRL_IBRS | SPEC_CTRL_STIBP | SPEC_CTRL_SSBD))
4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291
			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
4292 4293
	case MSR_IA32_PRED_CMD:
		if (!msr->host_initiated &&
4294
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBPB))
A
Ashok Raj 已提交
4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306 4307
			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;
4308 4309 4310 4311 4312 4313 4314 4315 4316 4317
	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
4318
	case MSR_STAR:
4319
		svm->vmcb->save.star = data;
A
Avi Kivity 已提交
4320
		break;
4321
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
4322
	case MSR_LSTAR:
4323
		svm->vmcb->save.lstar = data;
A
Avi Kivity 已提交
4324 4325
		break;
	case MSR_CSTAR:
4326
		svm->vmcb->save.cstar = data;
A
Avi Kivity 已提交
4327 4328
		break;
	case MSR_KERNEL_GS_BASE:
4329
		svm->vmcb->save.kernel_gs_base = data;
A
Avi Kivity 已提交
4330 4331
		break;
	case MSR_SYSCALL_MASK:
4332
		svm->vmcb->save.sfmask = data;
A
Avi Kivity 已提交
4333 4334 4335
		break;
#endif
	case MSR_IA32_SYSENTER_CS:
4336
		svm->vmcb->save.sysenter_cs = data;
A
Avi Kivity 已提交
4337 4338
		break;
	case MSR_IA32_SYSENTER_EIP:
4339
		svm->sysenter_eip = data;
4340
		svm->vmcb->save.sysenter_eip = data;
A
Avi Kivity 已提交
4341 4342
		break;
	case MSR_IA32_SYSENTER_ESP:
4343
		svm->sysenter_esp = data;
4344
		svm->vmcb->save.sysenter_esp = data;
A
Avi Kivity 已提交
4345
		break;
P
Paolo Bonzini 已提交
4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357
	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;
4358
	case MSR_IA32_DEBUGCTLMSR:
4359
		if (!boot_cpu_has(X86_FEATURE_LBRV)) {
4360 4361
			vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n",
				    __func__, data);
4362 4363 4364 4365 4366 4367
			break;
		}
		if (data & DEBUGCTL_RESERVED_BITS)
			return 1;

		svm->vmcb->save.dbgctl = data;
4368
		mark_dirty(svm->vmcb, VMCB_LBR);
4369 4370 4371 4372
		if (data & (1ULL<<0))
			svm_enable_lbrv(svm);
		else
			svm_disable_lbrv(svm);
4373
		break;
A
Alexander Graf 已提交
4374
	case MSR_VM_HSAVE_PA:
4375
		svm->nested.hsave_msr = data;
4376
		break;
4377
	case MSR_VM_CR:
4378
		return svm_set_vm_cr(vcpu, data);
4379
	case MSR_VM_IGNNE:
4380
		vcpu_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data);
4381
		break;
4382 4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399
	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;
	}
4400 4401 4402
	case MSR_IA32_APICBASE:
		if (kvm_vcpu_apicv_active(vcpu))
			avic_update_vapic_bar(to_svm(vcpu), data);
4403
		/* Fall through */
A
Avi Kivity 已提交
4404
	default:
4405
		return kvm_set_msr_common(vcpu, msr);
A
Avi Kivity 已提交
4406 4407 4408 4409
	}
	return 0;
}

A
Avi Kivity 已提交
4410
static int wrmsr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4411
{
4412
	return kvm_emulate_wrmsr(&svm->vcpu);
A
Avi Kivity 已提交
4413 4414
}

A
Avi Kivity 已提交
4415
static int msr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4416
{
R
Rusty Russell 已提交
4417
	if (svm->vmcb->control.exit_info_1)
A
Avi Kivity 已提交
4418
		return wrmsr_interception(svm);
A
Avi Kivity 已提交
4419
	else
A
Avi Kivity 已提交
4420
		return rdmsr_interception(svm);
A
Avi Kivity 已提交
4421 4422
}

A
Avi Kivity 已提交
4423
static int interrupt_window_interception(struct vcpu_svm *svm)
4424
{
4425
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
4426
	svm_clear_vintr(svm);
4427
	svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
4428
	mark_dirty(svm->vmcb, VMCB_INTR);
4429
	++svm->vcpu.stat.irq_window_exits;
4430 4431 4432
	return 1;
}

4433 4434
static int pause_interception(struct vcpu_svm *svm)
{
4435 4436 4437
	struct kvm_vcpu *vcpu = &svm->vcpu;
	bool in_kernel = (svm_get_cpl(vcpu) == 0);

4438 4439 4440
	if (pause_filter_thresh)
		grow_ple_window(vcpu);

4441
	kvm_vcpu_on_spin(vcpu, in_kernel);
4442 4443 4444
	return 1;
}

4445 4446
static int nop_interception(struct vcpu_svm *svm)
{
4447
	return kvm_skip_emulated_instruction(&(svm->vcpu));
4448 4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460 4461
}

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);
}

4462 4463 4464 4465 4466 4467 4468 4469 4470 4471 4472 4473
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
4474
	u32 index = svm->vmcb->control.exit_info_2 & 0xFF;
4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495
	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: {
4496 4497 4498
		int i;
		struct kvm_vcpu *vcpu;
		struct kvm *kvm = svm->vcpu.kvm;
4499 4500 4501
		struct kvm_lapic *apic = svm->vcpu.arch.apic;

		/*
4502 4503 4504
		 * 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.
4505
		 */
4506 4507 4508 4509 4510 4511 4512 4513 4514
		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);
		}
4515 4516 4517
		break;
	}
	case AVIC_IPI_FAILURE_INVALID_TARGET:
4518 4519
		WARN_ONCE(1, "Invalid IPI target: index=%u, vcpu=%d, icr=%#0x:%#0x\n",
			  index, svm->vcpu.vcpu_id, icrh, icrl);
4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530 4531 4532
		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)
{
4533
	struct kvm_svm *kvm_svm = to_kvm_svm(vcpu->kvm);
4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554
	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;
	}

4555
	logical_apic_id_table = (u32 *) page_address(kvm_svm->avic_logical_id_table_page);
4556 4557 4558 4559

	return &logical_apic_id_table[index];
}

4560
static int avic_ldr_write(struct kvm_vcpu *vcpu, u8 g_physical_id, u32 ldr)
4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572
{
	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);
4573
	new_entry |= AVIC_LOGICAL_ID_ENTRY_VALID_MASK;
4574 4575 4576 4577 4578
	WRITE_ONCE(*entry, new_entry);

	return 0;
}

4579 4580 4581 4582 4583 4584 4585
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)
4586
		clear_bit(AVIC_LOGICAL_ID_ENTRY_VALID_BIT, (unsigned long *)entry);
4587 4588
}

4589 4590
static int avic_handle_ldr_update(struct kvm_vcpu *vcpu)
{
4591
	int ret = 0;
4592 4593 4594
	struct vcpu_svm *svm = to_svm(vcpu);
	u32 ldr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_LDR);

4595 4596
	if (ldr == svm->ldr_reg)
		return 0;
4597

4598 4599 4600 4601 4602 4603
	avic_invalidate_logical_id_entry(vcpu);

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

	if (!ret)
4604
		svm->ldr_reg = ldr;
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 4635 4636 4637 4638
	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;
}

4639
static void avic_handle_dfr_update(struct kvm_vcpu *vcpu)
4640 4641 4642 4643
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u32 dfr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_DFR);

4644 4645
	if (svm->dfr_reg == dfr)
		return;
4646

4647 4648
	avic_invalidate_logical_id_entry(vcpu);
	svm->dfr_reg = dfr;
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 4722 4723 4724 4725
}

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 */
4726
		ret = kvm_emulate_instruction(&svm->vcpu, 0);
4727 4728 4729 4730 4731
	}

	return ret;
}

4732
static int (*const svm_exit_handlers[])(struct vcpu_svm *svm) = {
4733 4734 4735 4736
	[SVM_EXIT_READ_CR0]			= cr_interception,
	[SVM_EXIT_READ_CR3]			= cr_interception,
	[SVM_EXIT_READ_CR4]			= cr_interception,
	[SVM_EXIT_READ_CR8]			= cr_interception,
4737
	[SVM_EXIT_CR0_SEL_WRITE]		= cr_interception,
4738
	[SVM_EXIT_WRITE_CR0]			= cr_interception,
4739 4740
	[SVM_EXIT_WRITE_CR3]			= cr_interception,
	[SVM_EXIT_WRITE_CR4]			= cr_interception,
J
Joerg Roedel 已提交
4741
	[SVM_EXIT_WRITE_CR8]			= cr8_write_interception,
4742 4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757
	[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
4758 4759
	[SVM_EXIT_EXCP_BASE + DB_VECTOR]	= db_interception,
	[SVM_EXIT_EXCP_BASE + BP_VECTOR]	= bp_interception,
4760
	[SVM_EXIT_EXCP_BASE + UD_VECTOR]	= ud_interception,
J
Joerg Roedel 已提交
4761 4762
	[SVM_EXIT_EXCP_BASE + PF_VECTOR]	= pf_interception,
	[SVM_EXIT_EXCP_BASE + MC_VECTOR]	= mc_interception,
4763
	[SVM_EXIT_EXCP_BASE + AC_VECTOR]	= ac_interception,
4764
	[SVM_EXIT_EXCP_BASE + GP_VECTOR]	= gp_interception,
J
Joerg Roedel 已提交
4765
	[SVM_EXIT_INTR]				= intr_interception,
4766
	[SVM_EXIT_NMI]				= nmi_interception,
A
Avi Kivity 已提交
4767 4768
	[SVM_EXIT_SMI]				= nop_on_interception,
	[SVM_EXIT_INIT]				= nop_on_interception,
4769
	[SVM_EXIT_VINTR]			= interrupt_window_interception,
A
Avi Kivity 已提交
4770
	[SVM_EXIT_RDPMC]			= rdpmc_interception,
A
Avi Kivity 已提交
4771
	[SVM_EXIT_CPUID]			= cpuid_interception,
4772
	[SVM_EXIT_IRET]                         = iret_interception,
4773
	[SVM_EXIT_INVD]                         = emulate_on_interception,
4774
	[SVM_EXIT_PAUSE]			= pause_interception,
A
Avi Kivity 已提交
4775
	[SVM_EXIT_HLT]				= halt_interception,
M
Marcelo Tosatti 已提交
4776
	[SVM_EXIT_INVLPG]			= invlpg_interception,
A
Alexander Graf 已提交
4777
	[SVM_EXIT_INVLPGA]			= invlpga_interception,
J
Joerg Roedel 已提交
4778
	[SVM_EXIT_IOIO]				= io_interception,
A
Avi Kivity 已提交
4779 4780
	[SVM_EXIT_MSR]				= msr_interception,
	[SVM_EXIT_TASK_SWITCH]			= task_switch_interception,
4781
	[SVM_EXIT_SHUTDOWN]			= shutdown_interception,
A
Alexander Graf 已提交
4782
	[SVM_EXIT_VMRUN]			= vmrun_interception,
4783
	[SVM_EXIT_VMMCALL]			= vmmcall_interception,
4784 4785
	[SVM_EXIT_VMLOAD]			= vmload_interception,
	[SVM_EXIT_VMSAVE]			= vmsave_interception,
4786 4787
	[SVM_EXIT_STGI]				= stgi_interception,
	[SVM_EXIT_CLGI]				= clgi_interception,
4788
	[SVM_EXIT_SKINIT]			= skinit_interception,
D
David Kaplan 已提交
4789
	[SVM_EXIT_WBINVD]                       = wbinvd_interception,
4790 4791
	[SVM_EXIT_MONITOR]			= monitor_interception,
	[SVM_EXIT_MWAIT]			= mwait_interception,
J
Joerg Roedel 已提交
4792
	[SVM_EXIT_XSETBV]			= xsetbv_interception,
J
Jim Mattson 已提交
4793
	[SVM_EXIT_RDPRU]			= rdpru_interception,
4794
	[SVM_EXIT_NPF]				= npf_interception,
B
Brijesh Singh 已提交
4795
	[SVM_EXIT_RSM]                          = rsm_interception,
4796 4797
	[SVM_EXIT_AVIC_INCOMPLETE_IPI]		= avic_incomplete_ipi_interception,
	[SVM_EXIT_AVIC_UNACCELERATED_ACCESS]	= avic_unaccelerated_access_interception,
A
Avi Kivity 已提交
4798 4799
};

4800
static void dump_vmcb(struct kvm_vcpu *vcpu)
4801 4802 4803 4804 4805
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb_control_area *control = &svm->vmcb->control;
	struct vmcb_save_area *save = &svm->vmcb->save;

4806 4807 4808 4809 4810
	if (!dump_invalid_vmcb) {
		pr_warn_ratelimited("set kvm_amd.dump_invalid_vmcb=1 to dump internal KVM state.\n");
		return;
	}

4811
	pr_err("VMCB Control Area:\n");
4812 4813 4814 4815 4816 4817 4818
	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);
4819 4820
	pr_err("%-20s%d\n", "pause filter threshold:",
	       control->pause_filter_thresh);
4821 4822 4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834 4835
	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);
4836
	pr_err("%-20s%016llx\n", "avic_vapic_bar:", control->avic_vapic_bar);
4837 4838
	pr_err("%-20s%08x\n", "event_inj:", control->event_inj);
	pr_err("%-20s%08x\n", "event_inj_err:", control->event_inj_err);
4839
	pr_err("%-20s%lld\n", "virt_ext:", control->virt_ext);
4840
	pr_err("%-20s%016llx\n", "next_rip:", control->next_rip);
4841 4842 4843
	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);
4844
	pr_err("VMCB State Save Area:\n");
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 4880 4881 4882 4883 4884
	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);
4885 4886
	pr_err("cpl:            %d                efer:         %016llx\n",
		save->cpl, save->efer);
4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913
	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);
4914 4915
}

4916 4917 4918 4919 4920 4921 4922 4923
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
4924
static int handle_exit(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
4925
{
4926
	struct vcpu_svm *svm = to_svm(vcpu);
A
Avi Kivity 已提交
4927
	struct kvm_run *kvm_run = vcpu->run;
4928
	u32 exit_code = svm->vmcb->control.exit_code;
A
Avi Kivity 已提交
4929

4930 4931
	trace_kvm_exit(exit_code, vcpu, KVM_ISA_SVM);

4932
	if (!is_cr_intercept(svm, INTERCEPT_CR0_WRITE))
4933 4934 4935
		vcpu->arch.cr0 = svm->vmcb->save.cr0;
	if (npt_enabled)
		vcpu->arch.cr3 = svm->vmcb->save.cr3;
4936

4937 4938 4939 4940 4941 4942 4943
	if (unlikely(svm->nested.exit_required)) {
		nested_svm_vmexit(svm);
		svm->nested.exit_required = false;

		return 1;
	}

4944
	if (is_guest_mode(vcpu)) {
4945 4946
		int vmexit;

4947 4948 4949 4950
		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,
4951 4952
					svm->vmcb->control.exit_int_info_err,
					KVM_ISA_SVM);
4953

4954 4955 4956 4957 4958 4959
		vmexit = nested_svm_exit_special(svm);

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

		if (vmexit == NESTED_EXIT_DONE)
4960 4961 4962
			return 1;
	}

4963 4964
	svm_complete_interrupts(svm);

4965 4966 4967 4968
	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;
4969
		dump_vmcb(vcpu);
4970 4971 4972
		return 0;
	}

4973
	if (is_external_interrupt(svm->vmcb->control.exit_int_info) &&
4974
	    exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR &&
4975 4976
	    exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH &&
	    exit_code != SVM_EXIT_INTR && exit_code != SVM_EXIT_NMI)
4977
		printk(KERN_ERR "%s: unexpected exit_int_info 0x%x "
A
Avi Kivity 已提交
4978
		       "exit_code 0x%x\n",
4979
		       __func__, svm->vmcb->control.exit_int_info,
A
Avi Kivity 已提交
4980 4981
		       exit_code);

4982
	if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
J
Joe Perches 已提交
4983
	    || !svm_exit_handlers[exit_code]) {
4984 4985 4986 4987 4988 4989 4990 4991
		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
4992 4993
	}

A
Avi Kivity 已提交
4994
	return svm_exit_handlers[exit_code](svm);
A
Avi Kivity 已提交
4995 4996 4997 4998 4999 5000
}

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

5001 5002
	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
5003 5004 5005
	load_TR_desc();
}

5006 5007 5008 5009 5010 5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024 5025 5026 5027 5028 5029
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
5030
static void pre_svm_run(struct vcpu_svm *svm)
A
Avi Kivity 已提交
5031 5032 5033
{
	int cpu = raw_smp_processor_id();

5034
	struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
A
Avi Kivity 已提交
5035

5036 5037 5038
	if (sev_guest(svm->vcpu.kvm))
		return pre_sev_run(svm, cpu);

5039
	/* FIXME: handle wraparound of asid_generation */
5040 5041
	if (svm->asid_generation != sd->asid_generation)
		new_asid(svm, sd);
A
Avi Kivity 已提交
5042 5043
}

5044 5045 5046 5047 5048 5049
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;
5050
	set_intercept(svm, INTERCEPT_IRET);
5051 5052
	++vcpu->stat.nmi_injections;
}
A
Avi Kivity 已提交
5053

5054
static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
A
Avi Kivity 已提交
5055 5056 5057
{
	struct vmcb_control_area *control;

5058
	/* The following fields are ignored when AVIC is enabled */
R
Rusty Russell 已提交
5059
	control = &svm->vmcb->control;
5060
	control->int_vector = irq;
A
Avi Kivity 已提交
5061 5062 5063
	control->int_ctl &= ~V_INTR_PRIO_MASK;
	control->int_ctl |= V_IRQ_MASK |
		((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
5064
	mark_dirty(svm->vmcb, VMCB_INTR);
A
Avi Kivity 已提交
5065 5066
}

5067
static void svm_set_irq(struct kvm_vcpu *vcpu)
E
Eddie Dong 已提交
5068 5069 5070
{
	struct vcpu_svm *svm = to_svm(vcpu);

5071
	BUG_ON(!(gif_set(svm)));
5072

5073 5074 5075
	trace_kvm_inj_virq(vcpu->arch.interrupt.nr);
	++vcpu->stat.irq_injections;

5076 5077
	svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr |
		SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR;
E
Eddie Dong 已提交
5078 5079
}

5080 5081 5082 5083 5084
static inline bool svm_nested_virtualize_tpr(struct kvm_vcpu *vcpu)
{
	return is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK);
}

5085
static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
5086 5087 5088
{
	struct vcpu_svm *svm = to_svm(vcpu);

5089 5090
	if (svm_nested_virtualize_tpr(vcpu) ||
	    kvm_vcpu_apicv_active(vcpu))
5091 5092
		return;

5093 5094
	clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);

5095
	if (irr == -1)
5096 5097
		return;

5098
	if (tpr >= irr)
5099
		set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
5100
}
5101

5102
static void svm_set_virtual_apic_mode(struct kvm_vcpu *vcpu)
5103 5104 5105 5106
{
	return;
}

5107
static bool svm_get_enable_apicv(struct kvm_vcpu *vcpu)
5108
{
5109
	return avic && irqchip_split(vcpu->kvm);
5110 5111 5112 5113
}

static void svm_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr)
{
5114 5115
}

5116
static void svm_hwapic_isr_update(struct kvm_vcpu *vcpu, int max_isr)
5117
{
5118 5119
}

5120
/* Note: Currently only used by Hyper-V. */
5121
static void svm_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu)
5122
{
5123 5124 5125
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *vmcb = svm->vmcb;

5126 5127 5128 5129 5130
	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);
5131 5132
}

5133
static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
5134 5135 5136 5137
{
	return;
}

5138 5139 5140 5141 5142
static void svm_deliver_avic_intr(struct kvm_vcpu *vcpu, int vec)
{
	kvm_lapic_set_irr(vec, vcpu->arch.apic);
	smp_mb__after_atomic();

5143 5144 5145 5146 5147 5148 5149
	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
5150 5151 5152
		kvm_vcpu_wake_up(vcpu);
}

5153 5154 5155 5156 5157
static bool svm_dy_apicv_has_pending_interrupt(struct kvm_vcpu *vcpu)
{
	return false;
}

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 5199 5200 5201 5202 5203
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.
	 */
5204
	ir = kzalloc(sizeof(struct amd_svm_iommu_ir), GFP_KERNEL_ACCOUNT);
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 5233 5234 5235 5236 5237
	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);

5238 5239
	if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu) ||
	    !kvm_irq_is_postable(&irq)) {
5240 5241 5242 5243 5244 5245 5246 5247
		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);
5248
	vcpu_info->pi_desc_addr = __sme_set(page_to_phys((*svm)->avic_backing_page));
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 5288 5289 5290 5291 5292
	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.
5293
		 * 4. IRQ has incompatible delivery mode (SMI, INIT, etc)
5294 5295 5296 5297 5298 5299
		 */
		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 */
5300 5301
			pi.base = __sme_set(page_to_phys(svm->avic_backing_page) &
					    AVIC_HPA_MASK);
5302
			pi.ga_tag = AVIC_GATAG(to_kvm_svm(kvm)->avic_vm_id,
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 5341 5342 5343 5344 5345
						     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) {
5346 5347
			trace_kvm_pi_irte_update(host_irq, svm->vcpu.vcpu_id,
						 e->gsi, vcpu_info.vector,
5348 5349 5350 5351 5352 5353 5354 5355 5356 5357 5358 5359 5360 5361 5362
						 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;
}

5363 5364 5365 5366
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
5367 5368 5369 5370 5371 5372
	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;
5373 5374
}

J
Jan Kiszka 已提交
5375 5376 5377 5378 5379 5380 5381 5382 5383 5384 5385 5386 5387
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;
5388
		set_intercept(svm, INTERCEPT_IRET);
J
Jan Kiszka 已提交
5389 5390
	} else {
		svm->vcpu.arch.hflags &= ~HF_NMI_MASK;
5391
		clr_intercept(svm, INTERCEPT_IRET);
J
Jan Kiszka 已提交
5392 5393 5394
	}
}

5395 5396 5397 5398
static int svm_interrupt_allowed(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *vmcb = svm->vmcb;
5399 5400 5401 5402 5403 5404
	int ret;

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

5405
	ret = !!(kvm_get_rflags(vcpu) & X86_EFLAGS_IF);
5406

5407
	if (is_guest_mode(vcpu))
5408 5409 5410
		return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK);

	return ret;
5411 5412
}

5413
static void enable_irq_window(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
5414
{
5415 5416
	struct vcpu_svm *svm = to_svm(vcpu);

5417 5418 5419
	if (kvm_vcpu_apicv_active(vcpu))
		return;

J
Joerg Roedel 已提交
5420 5421 5422 5423
	/*
	 * 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
5424 5425 5426
	 * 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
5427
	 */
5428
	if ((vgif_enabled(svm) || gif_set(svm)) && nested_svm_intr(svm)) {
5429 5430 5431
		svm_set_vintr(svm);
		svm_inject_irq(svm, 0x0);
	}
5432 5433
}

5434
static void enable_nmi_window(struct kvm_vcpu *vcpu)
5435
{
5436
	struct vcpu_svm *svm = to_svm(vcpu);
5437

5438 5439
	if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK))
	    == HF_NMI_MASK)
5440
		return; /* IRET will cause a vm exit */
5441

5442 5443 5444
	if (!gif_set(svm)) {
		if (vgif_enabled(svm))
			set_intercept(svm, INTERCEPT_STGI);
5445
		return; /* STGI will cause a vm exit */
5446
	}
5447 5448 5449 5450

	if (svm->nested.exit_required)
		return; /* we're not going to run the guest yet */

J
Joerg Roedel 已提交
5451 5452 5453 5454
	/*
	 * Something prevents NMI from been injected. Single step over possible
	 * problem (IRET or exception injection or interrupt shadow)
	 */
5455
	svm->nmi_singlestep_guest_rflags = svm_get_rflags(vcpu);
J
Jan Kiszka 已提交
5456
	svm->nmi_singlestep = true;
5457
	svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);
5458 5459
}

5460 5461 5462 5463 5464
static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)
{
	return 0;
}

5465 5466 5467 5468 5469
static int svm_set_identity_map_addr(struct kvm *kvm, u64 ident_addr)
{
	return 0;
}

5470
static void svm_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa)
5471
{
5472 5473 5474 5475 5476 5477
	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--;
5478 5479
}

5480 5481 5482 5483 5484 5485 5486
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);
}

5487 5488 5489 5490
static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
{
}

5491 5492 5493 5494
static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

5495
	if (svm_nested_virtualize_tpr(vcpu))
5496 5497
		return;

5498
	if (!is_cr_intercept(svm, INTERCEPT_CR8_WRITE)) {
5499
		int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK;
5500
		kvm_set_cr8(vcpu, cr8);
5501 5502 5503
	}
}

5504 5505 5506 5507 5508
static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u64 cr8;

5509 5510
	if (svm_nested_virtualize_tpr(vcpu) ||
	    kvm_vcpu_apicv_active(vcpu))
5511 5512
		return;

5513 5514 5515 5516 5517
	cr8 = kvm_get_cr8(vcpu);
	svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
	svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK;
}

5518 5519 5520 5521 5522
static void svm_complete_interrupts(struct vcpu_svm *svm)
{
	u8 vector;
	int type;
	u32 exitintinfo = svm->vmcb->control.exit_int_info;
5523 5524 5525
	unsigned int3_injected = svm->int3_injected;

	svm->int3_injected = 0;
5526

5527 5528 5529 5530 5531 5532
	/*
	 * 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) {
5533
		svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK);
5534 5535
		kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
	}
5536

5537 5538 5539 5540 5541 5542 5543
	svm->vcpu.arch.nmi_injected = false;
	kvm_clear_exception_queue(&svm->vcpu);
	kvm_clear_interrupt_queue(&svm->vcpu);

	if (!(exitintinfo & SVM_EXITINTINFO_VALID))
		return;

5544 5545
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);

5546 5547 5548 5549 5550 5551 5552 5553
	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:
5554 5555 5556 5557 5558 5559 5560 5561 5562 5563 5564
		/*
		 * 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);
5565
			break;
5566
		}
5567 5568
		if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) {
			u32 err = svm->vmcb->control.exit_int_info_err;
5569
			kvm_requeue_exception_e(&svm->vcpu, vector, err);
5570 5571

		} else
5572
			kvm_requeue_exception(&svm->vcpu, vector);
5573 5574
		break;
	case SVM_EXITINTINFO_TYPE_INTR:
5575
		kvm_queue_interrupt(&svm->vcpu, vector, false);
5576 5577 5578 5579 5580 5581
		break;
	default:
		break;
	}
}

A
Avi Kivity 已提交
5582 5583 5584 5585 5586 5587 5588 5589 5590 5591 5592
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
5593
static void svm_vcpu_run(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
5594
{
5595
	struct vcpu_svm *svm = to_svm(vcpu);
5596

5597 5598 5599 5600
	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];

5601 5602 5603 5604 5605 5606 5607
	/*
	 * A vmexit emulation is required before the vcpu can be executed
	 * again.
	 */
	if (unlikely(svm->nested.exit_required))
		return;

5608 5609 5610 5611 5612 5613 5614 5615 5616 5617 5618 5619 5620 5621 5622 5623
	/*
	 * 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
5624
	pre_svm_run(svm);
A
Avi Kivity 已提交
5625

5626 5627
	sync_lapic_to_cr8(vcpu);

5628
	svm->vmcb->save.cr2 = vcpu->arch.cr2;
A
Avi Kivity 已提交
5629

5630
	clgi();
5631
	kvm_load_guest_xcr0(vcpu);
5632

5633 5634 5635 5636
	if (lapic_in_kernel(vcpu) &&
		vcpu->arch.apic->lapic_timer.timer_advance_ns)
		kvm_wait_lapic_expire(vcpu);

5637 5638 5639 5640 5641 5642
	/*
	 * 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.
	 */
5643
	x86_spec_ctrl_set_guest(svm->spec_ctrl, svm->virt_spec_ctrl);
5644

5645 5646
	local_irq_enable();

A
Avi Kivity 已提交
5647
	asm volatile (
A
Avi Kivity 已提交
5648 5649 5650 5651 5652 5653 5654
		"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"
5655
#ifdef CONFIG_X86_64
R
Rusty Russell 已提交
5656 5657 5658 5659 5660 5661 5662 5663
		"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
Avi Kivity 已提交
5664 5665 5666
#endif

		/* Enter guest mode */
A
Avi Kivity 已提交
5667 5668
		"push %%" _ASM_AX " \n\t"
		"mov %c[vmcb](%[svm]), %%" _ASM_AX " \n\t"
5669 5670 5671
		__ex("vmload %%" _ASM_AX) "\n\t"
		__ex("vmrun %%" _ASM_AX) "\n\t"
		__ex("vmsave %%" _ASM_AX) "\n\t"
A
Avi Kivity 已提交
5672
		"pop %%" _ASM_AX " \n\t"
A
Avi Kivity 已提交
5673 5674

		/* Save guest registers, load host registers */
A
Avi Kivity 已提交
5675 5676 5677 5678 5679 5680
		"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"
5681
#ifdef CONFIG_X86_64
R
Rusty Russell 已提交
5682 5683 5684 5685 5686 5687 5688 5689
		"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"
5690 5691 5692 5693
		/*
		* Clear host registers marked as clobbered to prevent
		* speculative use.
		*/
5694 5695 5696 5697 5698 5699 5700 5701
		"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
5702
#endif
5703 5704 5705 5706 5707
		"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
Avi Kivity 已提交
5708
		"pop %%" _ASM_BP
A
Avi Kivity 已提交
5709
		:
R
Rusty Russell 已提交
5710
		: [svm]"a"(svm),
A
Avi Kivity 已提交
5711
		  [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
5712 5713 5714 5715 5716 5717
		  [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]))
5718
#ifdef CONFIG_X86_64
5719 5720 5721 5722 5723 5724 5725 5726
		  , [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
Avi Kivity 已提交
5727
#endif
5728 5729
		: "cc", "memory"
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
5730
		, "rbx", "rcx", "rdx", "rsi", "rdi"
5731
		, "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15"
A
Avi Kivity 已提交
5732 5733
#else
		, "ebx", "ecx", "edx", "esi", "edi"
5734 5735
#endif
		);
A
Avi Kivity 已提交
5736

5737 5738 5739 5740 5741 5742 5743 5744 5745 5746 5747 5748
	/* 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

5749 5750 5751 5752 5753 5754 5755 5756 5757 5758 5759 5760 5761 5762 5763
	/*
	 * 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.
	 */
5764
	if (unlikely(!msr_write_intercepted(vcpu, MSR_IA32_SPEC_CTRL)))
5765
		svm->spec_ctrl = native_read_msr(MSR_IA32_SPEC_CTRL);
5766

A
Avi Kivity 已提交
5767 5768
	reload_tss(vcpu);

5769 5770
	local_irq_disable();

5771 5772
	x86_spec_ctrl_restore_host(svm->spec_ctrl, svm->virt_spec_ctrl);

5773 5774 5775 5776 5777
	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;

5778
	if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
5779
		kvm_before_interrupt(&svm->vcpu);
5780

5781
	kvm_put_guest_xcr0(vcpu);
5782 5783 5784 5785 5786
	stgi();

	/* Any pending NMI will happen here */

	if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
5787
		kvm_after_interrupt(&svm->vcpu);
5788

5789 5790
	sync_cr8_to_lapic(vcpu);

5791
	svm->next_rip = 0;
5792

5793 5794
	svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;

G
Gleb Natapov 已提交
5795 5796
	/* if exit due to PF check for async PF */
	if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR)
5797
		svm->vcpu.arch.apf.host_apf_reason = kvm_read_and_reset_pf_reason();
G
Gleb Natapov 已提交
5798

A
Avi Kivity 已提交
5799 5800 5801 5802
	if (npt_enabled) {
		vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR);
		vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR);
	}
5803 5804 5805 5806 5807 5808 5809 5810

	/*
	 * 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);
5811 5812

	mark_all_clean(svm->vmcb);
A
Avi Kivity 已提交
5813
}
5814
STACK_FRAME_NON_STANDARD(svm_vcpu_run);
A
Avi Kivity 已提交
5815 5816 5817

static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
{
5818 5819
	struct vcpu_svm *svm = to_svm(vcpu);

5820
	svm->vmcb->save.cr3 = __sme_set(root);
5821
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
5822 5823
}

5824 5825 5826 5827
static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root)
{
	struct vcpu_svm *svm = to_svm(vcpu);

5828
	svm->vmcb->control.nested_cr3 = __sme_set(root);
5829
	mark_dirty(svm->vmcb, VMCB_NPT);
5830 5831

	/* Also sync guest cr3 here in case we live migrate */
5832
	svm->vmcb->save.cr3 = kvm_read_cr3(vcpu);
5833
	mark_dirty(svm->vmcb, VMCB_CR);
5834 5835
}

A
Avi Kivity 已提交
5836 5837
static int is_disabled(void)
{
5838 5839 5840 5841 5842 5843
	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
5844 5845 5846
	return 0;
}

I
Ingo Molnar 已提交
5847 5848 5849 5850 5851 5852 5853 5854 5855 5856 5857
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;
}

5858
static int __init svm_check_processor_compat(void)
Y
Yang, Sheng 已提交
5859
{
5860
	return 0;
Y
Yang, Sheng 已提交
5861 5862
}

5863 5864 5865 5866 5867
static bool svm_cpu_has_accelerated_tpr(void)
{
	return false;
}

5868
static bool svm_has_emulated_msr(int index)
5869
{
5870 5871
	switch (index) {
	case MSR_IA32_MCG_EXT_CTL:
5872
	case MSR_IA32_VMX_BASIC ... MSR_IA32_VMX_VMFUNC:
5873 5874 5875 5876 5877
		return false;
	default:
		break;
	}

5878 5879 5880
	return true;
}

5881 5882 5883 5884 5885
static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
{
	return 0;
}

5886 5887
static void svm_cpuid_update(struct kvm_vcpu *vcpu)
{
5888 5889 5890
	struct vcpu_svm *svm = to_svm(vcpu);

	/* Update nrips enabled cache */
5891
	svm->nrips_enabled = !!guest_cpuid_has(&svm->vcpu, X86_FEATURE_NRIPS);
5892 5893 5894 5895

	if (!kvm_vcpu_apicv_active(vcpu))
		return;

5896
	guest_cpuid_clear(vcpu, X86_FEATURE_X2APIC);
5897 5898
}

5899 5900
#define F(x) bit(X86_FEATURE_##x)

5901 5902
static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
{
5903
	switch (func) {
5904 5905 5906 5907
	case 0x1:
		if (avic)
			entry->ecx &= ~bit(X86_FEATURE_X2APIC);
		break;
5908 5909 5910 5911
	case 0x80000001:
		if (nested)
			entry->ecx |= (1 << 2); /* Set SVM bit */
		break;
5912 5913 5914 5915 5916
	case 0x80000008:
		if (boot_cpu_has(X86_FEATURE_LS_CFG_SSBD) ||
		     boot_cpu_has(X86_FEATURE_AMD_SSBD))
			entry->ebx |= F(VIRT_SSBD);
		break;
5917 5918 5919 5920 5921
	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 */
5922 5923 5924 5925
		entry->edx = 0; /* Per default do not support any
				   additional features */

		/* Support next_rip if host supports it */
5926
		if (boot_cpu_has(X86_FEATURE_NRIPS))
5927
			entry->edx |= F(NRIPS);
5928

5929 5930
		/* Support NPT for the guest if enabled */
		if (npt_enabled)
5931
			entry->edx |= F(NPT);
5932

5933
		break;
5934 5935 5936 5937 5938 5939
	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);

5940
	}
5941 5942
}

5943
static int svm_get_lpage_level(void)
5944
{
5945
	return PT_PDPE_LEVEL;
5946 5947
}

5948 5949
static bool svm_rdtscp_supported(void)
{
P
Paolo Bonzini 已提交
5950
	return boot_cpu_has(X86_FEATURE_RDTSCP);
5951 5952
}

5953 5954 5955 5956 5957
static bool svm_invpcid_supported(void)
{
	return false;
}

5958 5959 5960 5961 5962
static bool svm_mpx_supported(void)
{
	return false;
}

5963 5964 5965 5966 5967
static bool svm_xsaves_supported(void)
{
	return false;
}

5968 5969 5970 5971 5972
static bool svm_umip_emulated(void)
{
	return false;
}

5973 5974 5975 5976 5977
static bool svm_pt_supported(void)
{
	return false;
}

5978 5979 5980 5981 5982
static bool svm_has_wbinvd_exit(void)
{
	return true;
}

5983
#define PRE_EX(exit)  { .exit_code = (exit), \
5984
			.stage = X86_ICPT_PRE_EXCEPT, }
5985
#define POST_EX(exit) { .exit_code = (exit), \
5986
			.stage = X86_ICPT_POST_EXCEPT, }
5987
#define POST_MEM(exit) { .exit_code = (exit), \
5988
			.stage = X86_ICPT_POST_MEMACCESS, }
5989

5990
static const struct __x86_intercept {
5991 5992 5993 5994 5995 5996 5997 5998
	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),
5999 6000
	[x86_intercept_dr_read]		= POST_EX(SVM_EXIT_READ_DR0),
	[x86_intercept_dr_write]	= POST_EX(SVM_EXIT_WRITE_DR0),
6001 6002 6003 6004 6005 6006 6007 6008
	[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),
6009 6010 6011 6012 6013 6014 6015 6016
	[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),
6017 6018 6019
	[x86_intercept_rdtscp]		= POST_EX(SVM_EXIT_RDTSCP),
	[x86_intercept_monitor]		= POST_MEM(SVM_EXIT_MONITOR),
	[x86_intercept_mwait]		= POST_EX(SVM_EXIT_MWAIT),
6020 6021 6022 6023 6024 6025 6026 6027 6028
	[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),
6029 6030 6031 6032 6033 6034 6035
	[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),
6036 6037 6038 6039
	[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),
6040
	[x86_intercept_xsetbv]		= PRE_EX(SVM_EXIT_XSETBV),
6041 6042
};

6043
#undef PRE_EX
6044
#undef POST_EX
6045
#undef POST_MEM
6046

6047 6048 6049 6050
static int svm_check_intercept(struct kvm_vcpu *vcpu,
			       struct x86_instruction_info *info,
			       enum x86_intercept_stage stage)
{
6051 6052 6053 6054 6055 6056 6057 6058 6059 6060
	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];

6061
	if (stage != icpt_info.stage)
6062 6063 6064 6065 6066 6067 6068 6069 6070 6071 6072 6073 6074 6075
		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;

6076 6077
		if (icpt_info.exit_code != SVM_EXIT_WRITE_CR0 ||
		    info->intercept == x86_intercept_clts)
6078 6079 6080 6081 6082 6083 6084 6085 6086 6087 6088 6089 6090 6091 6092 6093 6094 6095 6096 6097 6098 6099 6100
			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;
	}
6101 6102 6103 6104
	case SVM_EXIT_READ_DR0:
	case SVM_EXIT_WRITE_DR0:
		icpt_info.exit_code += info->modrm_reg;
		break;
6105 6106 6107 6108 6109 6110
	case SVM_EXIT_MSR:
		if (info->intercept == x86_intercept_wrmsr)
			vmcb->control.exit_info_1 = 1;
		else
			vmcb->control.exit_info_1 = 0;
		break;
6111 6112 6113 6114 6115 6116 6117
	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;
6118
		break;
6119 6120 6121 6122 6123 6124
	case SVM_EXIT_IOIO: {
		u64 exit_info;
		u32 bytes;

		if (info->intercept == x86_intercept_in ||
		    info->intercept == x86_intercept_ins) {
6125 6126
			exit_info = ((info->src_val & 0xffff) << 16) |
				SVM_IOIO_TYPE_MASK;
6127
			bytes = info->dst_bytes;
6128
		} else {
6129
			exit_info = (info->dst_val & 0xffff) << 16;
6130
			bytes = info->src_bytes;
6131 6132 6133 6134 6135 6136 6137 6138 6139 6140 6141 6142 6143 6144 6145 6146 6147 6148 6149 6150
		}

		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;
	}
6151 6152 6153 6154
	default:
		break;
	}

6155 6156 6157
	/* TODO: Advertise NRIPS to guest hypervisor unconditionally */
	if (static_cpu_has(X86_FEATURE_NRIPS))
		vmcb->control.next_rip  = info->next_rip;
6158 6159 6160 6161 6162 6163 6164 6165
	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;
6166 6167
}

6168
static void svm_handle_exit_irqoff(struct kvm_vcpu *vcpu)
6169
{
6170

6171 6172
}

6173 6174
static void svm_sched_in(struct kvm_vcpu *vcpu, int cpu)
{
6175 6176
	if (pause_filter_thresh)
		shrink_ple_window(vcpu);
6177 6178
}

6179 6180 6181 6182
static inline void avic_post_state_restore(struct kvm_vcpu *vcpu)
{
	if (avic_handle_apic_id_update(vcpu) != 0)
		return;
6183
	avic_handle_dfr_update(vcpu);
6184 6185 6186
	avic_handle_ldr_update(vcpu);
}

6187 6188 6189 6190 6191 6192
static void svm_setup_mce(struct kvm_vcpu *vcpu)
{
	/* [63:9] are reserved. */
	vcpu->arch.mcg_cap &= 0x1ff;
}

6193 6194
static int svm_smi_allowed(struct kvm_vcpu *vcpu)
{
6195 6196 6197 6198 6199 6200 6201 6202 6203 6204 6205 6206 6207 6208
	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;
	}

6209 6210 6211
	return 1;
}

6212 6213
static int svm_pre_enter_smm(struct kvm_vcpu *vcpu, char *smstate)
{
6214 6215 6216 6217 6218 6219 6220 6221 6222 6223 6224 6225 6226 6227 6228 6229 6230
	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;
	}
6231 6232 6233
	return 0;
}

6234
static int svm_pre_leave_smm(struct kvm_vcpu *vcpu, const char *smstate)
6235
{
6236 6237
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *nested_vmcb;
6238
	struct kvm_host_map map;
6239 6240
	u64 guest;
	u64 vmcb;
6241

6242 6243
	guest = GET_SMSTATE(u64, smstate, 0x7ed8);
	vmcb = GET_SMSTATE(u64, smstate, 0x7ee0);
6244

6245
	if (guest) {
6246
		if (kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(vmcb), &map) == -EINVAL)
6247
			return 1;
6248 6249
		nested_vmcb = map.hva;
		enter_svm_guest_mode(svm, vmcb, nested_vmcb, &map);
6250
	}
6251
	return 0;
6252 6253
}

6254 6255 6256 6257 6258 6259 6260 6261 6262 6263 6264 6265 6266
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
6267 6268 6269 6270 6271 6272 6273 6274 6275 6276 6277 6278 6279 6280 6281 6282 6283
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)
{
6284
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
B
Brijesh Singh 已提交
6285 6286 6287
	int asid, ret;

	ret = -EBUSY;
6288 6289 6290
	if (unlikely(sev->active))
		return ret;

B
Brijesh Singh 已提交
6291 6292 6293 6294 6295 6296 6297 6298 6299 6300
	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;
6301
	INIT_LIST_HEAD(&sev->regions_list);
B
Brijesh Singh 已提交
6302 6303 6304 6305 6306 6307 6308 6309

	return 0;

e_free:
	__sev_asid_free(asid);
	return ret;
}

6310 6311 6312 6313 6314 6315 6316 6317 6318 6319 6320 6321
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;

6322
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6323 6324 6325 6326 6327 6328 6329 6330 6331 6332 6333 6334
	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;
}

6335
static int __sev_issue_cmd(int fd, int id, void *data, int *error)
6336 6337 6338 6339 6340 6341 6342 6343 6344 6345 6346 6347 6348 6349
{
	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;
}

6350 6351
static int sev_issue_cmd(struct kvm *kvm, int id, void *data, int *error)
{
6352
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6353 6354 6355 6356

	return __sev_issue_cmd(sev->fd, id, data, error);
}

6357 6358
static int sev_launch_start(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6359
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6360 6361 6362 6363 6364 6365 6366 6367 6368 6369 6370 6371
	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;

6372
	start = kzalloc(sizeof(*start), GFP_KERNEL_ACCOUNT);
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 6399 6400 6401 6402 6403
	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 */
6404
	ret = __sev_issue_cmd(argp->sev_fd, SEV_CMD_LAUNCH_START, start, error);
6405 6406 6407 6408 6409 6410 6411 6412 6413 6414 6415 6416 6417 6418 6419 6420 6421 6422 6423 6424 6425 6426 6427 6428 6429 6430 6431 6432
	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;
}

6433 6434
static unsigned long get_num_contig_pages(unsigned long idx,
				struct page **inpages, unsigned long npages)
6435 6436
{
	unsigned long paddr, next_paddr;
6437
	unsigned long i = idx + 1, pages = 1;
6438 6439 6440 6441 6442 6443 6444 6445 6446 6447 6448 6449 6450 6451 6452 6453 6454 6455

	/* 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)
{
6456
	unsigned long vaddr, vaddr_end, next_vaddr, npages, pages, size, i;
6457
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6458 6459 6460
	struct kvm_sev_launch_update_data params;
	struct sev_data_launch_update_data *data;
	struct page **inpages;
6461
	int ret;
6462 6463 6464 6465 6466 6467 6468

	if (!sev_guest(kvm))
		return -ENOTTY;

	if (copy_from_user(&params, (void __user *)(uintptr_t)argp->data, sizeof(params)))
		return -EFAULT;

6469
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
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 6525 6526 6527 6528 6529
	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;
}

6530 6531
static int sev_launch_measure(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6532
	void __user *measure = (void __user *)(uintptr_t)argp->data;
6533
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6534 6535
	struct sev_data_launch_measure *data;
	struct kvm_sev_launch_measure params;
6536
	void __user *p = NULL;
6537 6538 6539 6540 6541 6542
	void *blob = NULL;
	int ret;

	if (!sev_guest(kvm))
		return -ENOTTY;

6543
	if (copy_from_user(&params, measure, sizeof(params)))
6544 6545
		return -EFAULT;

6546
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6547 6548 6549 6550 6551 6552 6553
	if (!data)
		return -ENOMEM;

	/* User wants to query the blob length */
	if (!params.len)
		goto cmd;

6554 6555
	p = (void __user *)(uintptr_t)params.uaddr;
	if (p) {
6556 6557 6558 6559 6560 6561 6562 6563 6564 6565 6566 6567 6568 6569 6570 6571 6572 6573 6574 6575 6576 6577 6578 6579 6580 6581 6582 6583
		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) {
6584
		if (copy_to_user(p, blob, params.len))
6585 6586 6587 6588 6589
			ret = -EFAULT;
	}

done:
	params.len = data->len;
6590
	if (copy_to_user(measure, &params, sizeof(params)))
6591 6592 6593 6594 6595 6596 6597 6598
		ret = -EFAULT;
e_free_blob:
	kfree(blob);
e_free:
	kfree(data);
	return ret;
}

6599 6600
static int sev_launch_finish(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6601
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6602 6603 6604 6605 6606 6607
	struct sev_data_launch_finish *data;
	int ret;

	if (!sev_guest(kvm))
		return -ENOTTY;

6608
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6609 6610 6611 6612 6613 6614 6615 6616 6617 6618
	if (!data)
		return -ENOMEM;

	data->handle = sev->handle;
	ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_FINISH, data, &argp->error);

	kfree(data);
	return ret;
}

6619 6620
static int sev_guest_status(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6621
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6622 6623 6624 6625 6626 6627 6628
	struct kvm_sev_guest_status params;
	struct sev_data_guest_status *data;
	int ret;

	if (!sev_guest(kvm))
		return -ENOTTY;

6629
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6630 6631 6632 6633 6634 6635 6636 6637 6638 6639 6640 6641 6642 6643 6644 6645 6646 6647 6648
	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;
}

6649 6650 6651 6652
static int __sev_issue_dbg_cmd(struct kvm *kvm, unsigned long src,
			       unsigned long dst, int size,
			       int *error, bool enc)
{
6653
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6654 6655 6656
	struct sev_data_dbg *data;
	int ret;

6657
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
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 6721 6722 6723 6724 6725
	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;
}

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 6798 6799 6800 6801 6802
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;
}

6803 6804 6805
static int sev_dbg_crypt(struct kvm *kvm, struct kvm_sev_cmd *argp, bool dec)
{
	unsigned long vaddr, vaddr_end, next_vaddr;
6806
	unsigned long dst_vaddr;
6807 6808 6809
	struct page **src_p, **dst_p;
	struct kvm_sev_dbg debug;
	unsigned long n;
6810 6811
	unsigned int size;
	int ret;
6812 6813 6814 6815 6816 6817 6818

	if (!sev_guest(kvm))
		return -ENOTTY;

	if (copy_from_user(&debug, (void __user *)(uintptr_t)argp->data, sizeof(debug)))
		return -EFAULT;

6819 6820 6821 6822 6823
	if (!debug.len || debug.src_uaddr + debug.len < debug.src_uaddr)
		return -EINVAL;
	if (!debug.dst_uaddr)
		return -EINVAL;

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 6855 6856 6857 6858 6859
	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);

6860 6861 6862 6863 6864 6865 6866 6867 6868 6869 6870 6871 6872
		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);
6873

6874 6875
		sev_unpin_memory(kvm, src_p, n);
		sev_unpin_memory(kvm, dst_p, n);
6876 6877 6878 6879 6880 6881 6882 6883 6884 6885 6886 6887

		if (ret)
			goto err;

		next_vaddr = vaddr + len;
		dst_vaddr = dst_vaddr + len;
		size -= len;
	}
err:
	return ret;
}

6888 6889
static int sev_launch_secret(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6890
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6891 6892 6893 6894 6895
	struct sev_data_launch_secret *data;
	struct kvm_sev_launch_secret params;
	struct page **pages;
	void *blob, *hdr;
	unsigned long n;
6896
	int ret, offset;
6897 6898 6899 6900 6901 6902 6903 6904 6905 6906 6907 6908 6909 6910 6911 6912 6913 6914 6915 6916 6917

	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;
6918
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6919 6920 6921
	if (!data)
		goto e_unpin_memory;

6922 6923 6924 6925
	offset = params.guest_uaddr & (PAGE_SIZE - 1);
	data->guest_address = __sme_page_pa(pages[0]) + offset;
	data->guest_len = params.guest_len;

6926 6927 6928 6929 6930 6931 6932 6933 6934 6935 6936 6937 6938 6939
	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;
	}
6940 6941
	data->hdr_address = __psp_pa(hdr);
	data->hdr_len = params.hdr_len;
6942 6943 6944 6945 6946 6947 6948 6949 6950 6951 6952 6953 6954 6955 6956

	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
6957 6958 6959 6960 6961 6962 6963 6964 6965 6966 6967 6968 6969 6970 6971 6972 6973
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;
6974 6975 6976
	case KVM_SEV_LAUNCH_START:
		r = sev_launch_start(kvm, &sev_cmd);
		break;
6977 6978 6979
	case KVM_SEV_LAUNCH_UPDATE_DATA:
		r = sev_launch_update_data(kvm, &sev_cmd);
		break;
6980 6981 6982
	case KVM_SEV_LAUNCH_MEASURE:
		r = sev_launch_measure(kvm, &sev_cmd);
		break;
6983 6984 6985
	case KVM_SEV_LAUNCH_FINISH:
		r = sev_launch_finish(kvm, &sev_cmd);
		break;
6986 6987 6988
	case KVM_SEV_GUEST_STATUS:
		r = sev_guest_status(kvm, &sev_cmd);
		break;
6989 6990 6991
	case KVM_SEV_DBG_DECRYPT:
		r = sev_dbg_crypt(kvm, &sev_cmd, true);
		break;
6992 6993 6994
	case KVM_SEV_DBG_ENCRYPT:
		r = sev_dbg_crypt(kvm, &sev_cmd, false);
		break;
6995 6996 6997
	case KVM_SEV_LAUNCH_SECRET:
		r = sev_launch_secret(kvm, &sev_cmd);
		break;
B
Brijesh Singh 已提交
6998 6999 7000 7001 7002 7003 7004 7005 7006 7007 7008 7009 7010
	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;
}

7011 7012 7013
static int svm_register_enc_region(struct kvm *kvm,
				   struct kvm_enc_region *range)
{
7014
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
7015 7016 7017 7018 7019 7020
	struct enc_region *region;
	int ret = 0;

	if (!sev_guest(kvm))
		return -ENOTTY;

7021 7022 7023
	if (range->addr > ULONG_MAX || range->size > ULONG_MAX)
		return -EINVAL;

7024
	region = kzalloc(sizeof(*region), GFP_KERNEL_ACCOUNT);
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 7054 7055 7056 7057 7058
	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)
{
7059
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
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 7097 7098 7099 7100 7101
	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;
}

7102 7103
static bool svm_need_emulation_on_page_fault(struct kvm_vcpu *vcpu)
{
7104 7105 7106 7107
	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;
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 7134 7135 7136 7137 7138
	 * 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.
7139 7140 7141 7142 7143 7144 7145 7146 7147 7148
	 *
	 * 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.
	 */
7149
	if (smap && (!smep || is_user)) {
7150 7151 7152
		if (!sev_guest(vcpu->kvm))
			return true;

7153
		pr_err_ratelimited("KVM: SEV Guest triggered AMD Erratum 1096\n");
7154 7155 7156 7157 7158 7159
		kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
	}

	return false;
}

7160 7161 7162 7163 7164 7165 7166 7167 7168 7169 7170 7171 7172 7173 7174
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));
}

7175
static struct kvm_x86_ops svm_x86_ops __ro_after_init = {
A
Avi Kivity 已提交
7176 7177 7178 7179
	.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
7180
	.check_processor_compatibility = svm_check_processor_compat,
A
Avi Kivity 已提交
7181 7182
	.hardware_enable = svm_hardware_enable,
	.hardware_disable = svm_hardware_disable,
7183
	.cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr,
7184
	.has_emulated_msr = svm_has_emulated_msr,
A
Avi Kivity 已提交
7185 7186 7187

	.vcpu_create = svm_create_vcpu,
	.vcpu_free = svm_free_vcpu,
7188
	.vcpu_reset = svm_vcpu_reset,
A
Avi Kivity 已提交
7189

7190 7191
	.vm_alloc = svm_vm_alloc,
	.vm_free = svm_vm_free,
7192
	.vm_init = avic_vm_init,
B
Brijesh Singh 已提交
7193
	.vm_destroy = svm_vm_destroy,
7194

7195
	.prepare_guest_switch = svm_prepare_guest_switch,
A
Avi Kivity 已提交
7196 7197
	.vcpu_load = svm_vcpu_load,
	.vcpu_put = svm_vcpu_put,
7198 7199
	.vcpu_blocking = svm_vcpu_blocking,
	.vcpu_unblocking = svm_vcpu_unblocking,
A
Avi Kivity 已提交
7200

7201
	.update_bp_intercept = update_bp_intercept,
7202
	.get_msr_feature = svm_get_msr_feature,
A
Avi Kivity 已提交
7203 7204 7205 7206 7207
	.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,
7208
	.get_cpl = svm_get_cpl,
7209
	.get_cs_db_l_bits = kvm_get_cs_db_l_bits,
7210
	.decache_cr0_guest_bits = svm_decache_cr0_guest_bits,
7211
	.decache_cr3 = svm_decache_cr3,
7212
	.decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
A
Avi Kivity 已提交
7213 7214 7215 7216 7217 7218 7219 7220
	.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
7221 7222
	.get_dr6 = svm_get_dr6,
	.set_dr6 = svm_set_dr6,
7223
	.set_dr7 = svm_set_dr7,
7224
	.sync_dirty_debug_regs = svm_sync_dirty_debug_regs,
A
Avi Kivity 已提交
7225
	.cache_reg = svm_cache_reg,
A
Avi Kivity 已提交
7226 7227
	.get_rflags = svm_get_rflags,
	.set_rflags = svm_set_rflags,
7228

A
Avi Kivity 已提交
7229
	.tlb_flush = svm_flush_tlb,
7230
	.tlb_flush_gva = svm_flush_tlb_gva,
A
Avi Kivity 已提交
7231 7232

	.run = svm_vcpu_run,
7233
	.handle_exit = handle_exit,
A
Avi Kivity 已提交
7234
	.skip_emulated_instruction = skip_emulated_instruction,
7235 7236
	.set_interrupt_shadow = svm_set_interrupt_shadow,
	.get_interrupt_shadow = svm_get_interrupt_shadow,
I
Ingo Molnar 已提交
7237
	.patch_hypercall = svm_patch_hypercall,
E
Eddie Dong 已提交
7238
	.set_irq = svm_set_irq,
7239
	.set_nmi = svm_inject_nmi,
7240
	.queue_exception = svm_queue_exception,
A
Avi Kivity 已提交
7241
	.cancel_injection = svm_cancel_injection,
7242
	.interrupt_allowed = svm_interrupt_allowed,
7243
	.nmi_allowed = svm_nmi_allowed,
J
Jan Kiszka 已提交
7244 7245
	.get_nmi_mask = svm_get_nmi_mask,
	.set_nmi_mask = svm_set_nmi_mask,
7246 7247 7248
	.enable_nmi_window = enable_nmi_window,
	.enable_irq_window = enable_irq_window,
	.update_cr8_intercept = update_cr8_intercept,
7249
	.set_virtual_apic_mode = svm_set_virtual_apic_mode,
7250 7251
	.get_enable_apicv = svm_get_enable_apicv,
	.refresh_apicv_exec_ctrl = svm_refresh_apicv_exec_ctrl,
7252
	.load_eoi_exitmap = svm_load_eoi_exitmap,
7253 7254
	.hwapic_irr_update = svm_hwapic_irr_update,
	.hwapic_isr_update = svm_hwapic_isr_update,
7255
	.sync_pir_to_irr = kvm_lapic_find_highest_irr,
7256
	.apicv_post_state_restore = avic_post_state_restore,
7257 7258

	.set_tss_addr = svm_set_tss_addr,
7259
	.set_identity_map_addr = svm_set_identity_map_addr,
7260
	.get_tdp_level = get_npt_level,
7261
	.get_mt_mask = svm_get_mt_mask,
7262

7263 7264
	.get_exit_info = svm_get_exit_info,

7265
	.get_lpage_level = svm_get_lpage_level,
7266 7267

	.cpuid_update = svm_cpuid_update,
7268 7269

	.rdtscp_supported = svm_rdtscp_supported,
7270
	.invpcid_supported = svm_invpcid_supported,
7271
	.mpx_supported = svm_mpx_supported,
7272
	.xsaves_supported = svm_xsaves_supported,
7273
	.umip_emulated = svm_umip_emulated,
7274
	.pt_supported = svm_pt_supported,
7275 7276

	.set_supported_cpuid = svm_set_supported_cpuid,
7277 7278

	.has_wbinvd_exit = svm_has_wbinvd_exit,
7279

7280
	.read_l1_tsc_offset = svm_read_l1_tsc_offset,
7281
	.write_l1_tsc_offset = svm_write_l1_tsc_offset,
7282 7283

	.set_tdp_cr3 = set_tdp_cr3,
7284 7285

	.check_intercept = svm_check_intercept,
7286
	.handle_exit_irqoff = svm_handle_exit_irqoff,
7287

7288 7289
	.request_immediate_exit = __kvm_request_immediate_exit,

7290
	.sched_in = svm_sched_in,
7291 7292

	.pmu_ops = &amd_pmu_ops,
7293
	.deliver_posted_interrupt = svm_deliver_avic_intr,
7294
	.dy_apicv_has_pending_interrupt = svm_dy_apicv_has_pending_interrupt,
7295
	.update_pi_irte = svm_update_pi_irte,
7296
	.setup_mce = svm_setup_mce,
7297

7298
	.smi_allowed = svm_smi_allowed,
7299 7300
	.pre_enter_smm = svm_pre_enter_smm,
	.pre_leave_smm = svm_pre_leave_smm,
7301
	.enable_smi_window = enable_smi_window,
B
Brijesh Singh 已提交
7302 7303

	.mem_enc_op = svm_mem_enc_op,
7304 7305
	.mem_enc_reg_region = svm_register_enc_region,
	.mem_enc_unreg_region = svm_unregister_enc_region,
7306

7307
	.nested_enable_evmcs = NULL,
7308
	.nested_get_evmcs_version = NULL,
7309 7310

	.need_emulation_on_page_fault = svm_need_emulation_on_page_fault,
7311 7312

	.apic_init_signal_blocked = svm_apic_init_signal_blocked,
A
Avi Kivity 已提交
7313 7314 7315 7316
};

static int __init svm_init(void)
{
7317
	return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm),
7318
			__alignof__(struct vcpu_svm), THIS_MODULE);
A
Avi Kivity 已提交
7319 7320 7321 7322
}

static void __exit svm_exit(void)
{
7323
	kvm_exit();
A
Avi Kivity 已提交
7324 7325 7326 7327
}

module_init(svm_init)
module_exit(svm_exit)