svm.c 185.4 KB
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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>
 *
 * This work is licensed under the terms of the GNU GPL, version 2.  See
 * the COPYING file in the top-level directory.
 *
 */
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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_NPT            (1 <<  0)
#define SVM_FEATURE_LBRV           (1 <<  1)
#define SVM_FEATURE_SVML           (1 <<  2)
#define SVM_FEATURE_NRIP           (1 <<  3)
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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 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 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);
572 573 574 575

	recalc_intercepts(svm);
}

576
static inline void clr_dr_intercepts(struct vcpu_svm *svm)
577 578 579
{
	struct vmcb *vmcb = get_host_vmcb(svm);

580
	vmcb->control.intercept_dr = 0;
581 582 583 584

	recalc_intercepts(svm);
}

585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602
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);
}

603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620
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);
}

621 622 623 624 625
static inline bool vgif_enabled(struct vcpu_svm *svm)
{
	return !!(svm->vmcb->control.int_ctl & V_GIF_ENABLE_MASK);
}

626 627
static inline void enable_gif(struct vcpu_svm *svm)
{
628 629 630 631
	if (vgif_enabled(svm))
		svm->vmcb->control.int_ctl |= V_GIF_MASK;
	else
		svm->vcpu.arch.hflags |= HF_GIF_MASK;
632 633 634 635
}

static inline void disable_gif(struct vcpu_svm *svm)
{
636 637 638 639
	if (vgif_enabled(svm))
		svm->vmcb->control.int_ctl &= ~V_GIF_MASK;
	else
		svm->vcpu.arch.hflags &= ~HF_GIF_MASK;
640 641 642 643
}

static inline bool gif_set(struct vcpu_svm *svm)
{
644 645 646 647
	if (vgif_enabled(svm))
		return !!(svm->vmcb->control.int_ctl & V_GIF_MASK);
	else
		return !!(svm->vcpu.arch.hflags & HF_GIF_MASK);
648 649
}

650
static unsigned long iopm_base;
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Avi Kivity 已提交
651 652 653 654

struct kvm_ldttss_desc {
	u16 limit0;
	u16 base0;
J
Joerg Roedel 已提交
655 656
	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
657 658 659 660 661 662 663
	u32 base3;
	u32 zero1;
} __attribute__((packed));

struct svm_cpu_data {
	int cpu;

A
Avi Kivity 已提交
664 665 666
	u64 asid_generation;
	u32 max_asid;
	u32 next_asid;
667
	u32 min_asid;
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668 669 670
	struct kvm_ldttss_desc *tss_desc;

	struct page *save_area;
A
Ashok Raj 已提交
671
	struct vmcb *current_vmcb;
672 673 674

	/* index = sev_asid, value = vmcb pointer */
	struct vmcb **sev_vmcbs;
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675 676 677 678
};

static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);

679
static const u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
A
Avi Kivity 已提交
680

681
#define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges)
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682 683 684
#define MSRS_RANGE_SIZE 2048
#define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)

685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705
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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706 707 708 709
#define MAX_INST_SIZE 15

static inline void clgi(void)
{
710
	asm volatile (__ex("clgi"));
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711 712 713 714
}

static inline void stgi(void)
{
715
	asm volatile (__ex("stgi"));
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Avi Kivity 已提交
716 717 718 719
}

static inline void invlpga(unsigned long addr, u32 asid)
{
720
	asm volatile (__ex("invlpga %1, %0") : : "c"(asid), "a"(addr));
A
Avi Kivity 已提交
721 722
}

723
static int get_npt_level(struct kvm_vcpu *vcpu)
724 725
{
#ifdef CONFIG_X86_64
726
	return PT64_ROOT_4LEVEL;
727 728 729 730 731
#else
	return PT32E_ROOT_LEVEL;
#endif
}

A
Avi Kivity 已提交
732 733
static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
{
734
	vcpu->arch.efer = efer;
735
	if (!npt_enabled && !(efer & EFER_LMA))
736
		efer &= ~EFER_LME;
A
Avi Kivity 已提交
737

738
	to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME;
739
	mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
A
Avi Kivity 已提交
740 741 742 743 744 745 746 747
}

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

748
static u32 svm_get_interrupt_shadow(struct kvm_vcpu *vcpu)
749 750 751 752 753
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u32 ret = 0;

	if (svm->vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK)
754 755
		ret = KVM_X86_SHADOW_INT_STI | KVM_X86_SHADOW_INT_MOV_SS;
	return ret;
756 757 758 759 760 761 762 763 764 765 766 767 768
}

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;

}

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Avi Kivity 已提交
769 770
static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
{
771 772
	struct vcpu_svm *svm = to_svm(vcpu);

773
	if (svm->vmcb->control.next_rip != 0) {
774
		WARN_ON_ONCE(!static_cpu_has(X86_FEATURE_NRIPS));
775
		svm->next_rip = svm->vmcb->control.next_rip;
776
	}
777

778
	if (!svm->next_rip) {
779
		if (kvm_emulate_instruction(vcpu, EMULTYPE_SKIP) !=
780 781
				EMULATE_DONE)
			printk(KERN_DEBUG "%s: NOP\n", __func__);
A
Avi Kivity 已提交
782 783
		return;
	}
784 785 786
	if (svm->next_rip - kvm_rip_read(vcpu) > MAX_INST_SIZE)
		printk(KERN_ERR "%s: ip 0x%lx next 0x%llx\n",
		       __func__, kvm_rip_read(vcpu), svm->next_rip);
A
Avi Kivity 已提交
787

788
	kvm_rip_write(vcpu, svm->next_rip);
789
	svm_set_interrupt_shadow(vcpu, 0);
A
Avi Kivity 已提交
790 791
}

792
static void svm_queue_exception(struct kvm_vcpu *vcpu)
J
Jan Kiszka 已提交
793 794
{
	struct vcpu_svm *svm = to_svm(vcpu);
795 796
	unsigned nr = vcpu->arch.exception.nr;
	bool has_error_code = vcpu->arch.exception.has_error_code;
797
	bool reinject = vcpu->arch.exception.injected;
798
	u32 error_code = vcpu->arch.exception.error_code;
J
Jan Kiszka 已提交
799

J
Joerg Roedel 已提交
800 801 802 803
	/*
	 * If we are within a nested VM we'd better #VMEXIT and let the guest
	 * handle the exception
	 */
804 805
	if (!reinject &&
	    nested_svm_check_exception(svm, nr, has_error_code, error_code))
J
Jan Kiszka 已提交
806 807
		return;

808 809
	kvm_deliver_exception_payload(&svm->vcpu);

810
	if (nr == BP_VECTOR && !static_cpu_has(X86_FEATURE_NRIPS)) {
811 812 813 814 815 816 817 818 819 820 821 822 823 824 825
		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.
		 */
		skip_emulated_instruction(&svm->vcpu);
		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
826 827 828 829 830 831 832
	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;
}

833 834 835 836 837 838
static void svm_init_erratum_383(void)
{
	u32 low, high;
	int err;
	u64 val;

839
	if (!static_cpu_has_bug(X86_BUG_AMD_TLB_MMATCH))
840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856
		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;
}

857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877
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
878 879
static int has_svm(void)
{
880
	const char *msg;
A
Avi Kivity 已提交
881

882
	if (!cpu_has_svm(&msg)) {
J
Joe Perches 已提交
883
		printk(KERN_INFO "has_svm: %s\n", msg);
A
Avi Kivity 已提交
884 885 886 887 888 889
		return 0;
	}

	return 1;
}

890
static void svm_hardware_disable(void)
A
Avi Kivity 已提交
891
{
892 893 894 895
	/* Make sure we clean up behind us */
	if (static_cpu_has(X86_FEATURE_TSCRATEMSR))
		wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);

896
	cpu_svm_disable();
897 898

	amd_pmu_disable_virt();
A
Avi Kivity 已提交
899 900
}

901
static int svm_hardware_enable(void)
A
Avi Kivity 已提交
902 903
{

904
	struct svm_cpu_data *sd;
A
Avi Kivity 已提交
905 906 907 908
	uint64_t efer;
	struct desc_struct *gdt;
	int me = raw_smp_processor_id();

909 910 911 912
	rdmsrl(MSR_EFER, efer);
	if (efer & EFER_SVME)
		return -EBUSY;

A
Avi Kivity 已提交
913
	if (!has_svm()) {
914
		pr_err("%s: err EOPNOTSUPP on %d\n", __func__, me);
915
		return -EINVAL;
A
Avi Kivity 已提交
916
	}
917 918
	sd = per_cpu(svm_data, me);
	if (!sd) {
919
		pr_err("%s: svm_data is NULL on %d\n", __func__, me);
920
		return -EINVAL;
A
Avi Kivity 已提交
921 922
	}

923 924 925
	sd->asid_generation = 1;
	sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
	sd->next_asid = sd->max_asid + 1;
926
	sd->min_asid = max_sev_asid + 1;
A
Avi Kivity 已提交
927

928
	gdt = get_current_gdt_rw();
929
	sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
A
Avi Kivity 已提交
930

931
	wrmsrl(MSR_EFER, efer | EFER_SVME);
A
Avi Kivity 已提交
932

933
	wrmsrl(MSR_VM_HSAVE_PA, page_to_pfn(sd->save_area) << PAGE_SHIFT);
934

935 936
	if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) {
		wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);
937
		__this_cpu_write(current_tsc_ratio, TSC_RATIO_DEFAULT);
938 939
	}

940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969

	/*
	 * 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;

970 971
	svm_init_erratum_383();

972 973
	amd_pmu_enable_virt();

974
	return 0;
A
Avi Kivity 已提交
975 976
}

977 978
static void svm_cpu_uninit(int cpu)
{
979
	struct svm_cpu_data *sd = per_cpu(svm_data, raw_smp_processor_id());
980

981
	if (!sd)
982 983 984
		return;

	per_cpu(svm_data, raw_smp_processor_id()) = NULL;
985
	kfree(sd->sev_vmcbs);
986 987
	__free_page(sd->save_area);
	kfree(sd);
988 989
}

A
Avi Kivity 已提交
990 991
static int svm_cpu_init(int cpu)
{
992
	struct svm_cpu_data *sd;
A
Avi Kivity 已提交
993 994
	int r;

995 996
	sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
	if (!sd)
A
Avi Kivity 已提交
997
		return -ENOMEM;
998
	sd->cpu = cpu;
A
Avi Kivity 已提交
999
	r = -ENOMEM;
1000
	sd->save_area = alloc_page(GFP_KERNEL);
1001
	if (!sd->save_area)
A
Avi Kivity 已提交
1002 1003
		goto err_1;

1004 1005
	if (svm_sev_enabled()) {
		r = -ENOMEM;
1006 1007 1008
		sd->sev_vmcbs = kmalloc_array(max_sev_asid + 1,
					      sizeof(void *),
					      GFP_KERNEL);
1009 1010 1011 1012
		if (!sd->sev_vmcbs)
			goto err_1;
	}

1013
	per_cpu(svm_data, cpu) = sd;
A
Avi Kivity 已提交
1014 1015 1016 1017

	return 0;

err_1:
1018
	kfree(sd);
A
Avi Kivity 已提交
1019 1020 1021 1022
	return r;

}

1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033
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;
}

1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052
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);
}

1053 1054
static void set_msr_interception(u32 *msrpm, unsigned msr,
				 int read, int write)
A
Avi Kivity 已提交
1055
{
1056 1057 1058
	u8 bit_read, bit_write;
	unsigned long tmp;
	u32 offset;
A
Avi Kivity 已提交
1059

1060 1061 1062 1063 1064 1065
	/*
	 * If this warning triggers extend the direct_access_msrs list at the
	 * beginning of the file
	 */
	WARN_ON(!valid_msr_intercept(msr));

1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076
	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
1077 1078
}

1079
static void svm_vcpu_init_msrpm(u32 *msrpm)
A
Avi Kivity 已提交
1080 1081 1082
{
	int i;

1083 1084
	memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));

1085 1086 1087 1088 1089 1090
	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);
	}
1091 1092
}

1093 1094 1095 1096 1097 1098 1099 1100
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)
1101
			return;
1102 1103 1104 1105 1106 1107 1108 1109 1110

		/* 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
1111
	}
1112 1113 1114 1115 1116

	/*
	 * If this BUG triggers the msrpm_offsets table has an overflow. Just
	 * increase MSRPM_OFFSETS in this case.
	 */
1117
	BUG();
A
Avi Kivity 已提交
1118 1119
}

1120
static void init_msrpm_offsets(void)
1121
{
1122
	int i;
1123

1124 1125 1126 1127 1128 1129 1130 1131 1132 1133
	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);
	}
1134 1135
}

1136 1137 1138 1139
static void svm_enable_lbrv(struct vcpu_svm *svm)
{
	u32 *msrpm = svm->msrpm;

1140
	svm->vmcb->control.virt_ext |= LBR_CTL_ENABLE_MASK;
1141 1142 1143 1144 1145 1146 1147 1148 1149 1150
	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;

1151
	svm->vmcb->control.virt_ext &= ~LBR_CTL_ENABLE_MASK;
1152 1153 1154 1155 1156 1157
	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);
}

1158 1159 1160
static void disable_nmi_singlestep(struct vcpu_svm *svm)
{
	svm->nmi_singlestep = false;
1161

1162 1163 1164 1165 1166 1167 1168
	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;
	}
1169 1170
}

1171
/* Note:
1172
 * This hash table is used to map VM_ID to a struct kvm_svm,
1173 1174 1175 1176
 * when handling AMD IOMMU GALOG notification to schedule in
 * a particular vCPU.
 */
#define SVM_VM_DATA_HASH_BITS	8
1177
static DEFINE_HASHTABLE(svm_vm_data_hash, SVM_VM_DATA_HASH_BITS);
1178 1179
static u32 next_vm_id = 0;
static bool next_vm_id_wrapped = 0;
1180
static DEFINE_SPINLOCK(svm_vm_data_hash_lock);
1181 1182 1183 1184 1185 1186 1187 1188

/* 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;
1189
	struct kvm_svm *kvm_svm;
1190 1191 1192 1193 1194 1195 1196
	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);
1197 1198
	hash_for_each_possible(svm_vm_data_hash, kvm_svm, hnode, vm_id) {
		if (kvm_svm->avic_vm_id != vm_id)
1199
			continue;
1200
		vcpu = kvm_get_vcpu_by_id(&kvm_svm->kvm, vcpu_id);
1201 1202 1203 1204 1205 1206 1207 1208 1209
		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.
	 */
1210
	if (vcpu)
1211 1212 1213 1214 1215
		kvm_vcpu_wake_up(vcpu);

	return 0;
}

B
Brijesh Singh 已提交
1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226
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
1227 1228 1229 1230
	/* Minimum ASID value that should be used for SEV guest */
	min_sev_asid = cpuid_edx(0x8000001F);

	/* Initialize SEV ASID bitmap */
1231
	sev_asid_bitmap = bitmap_zalloc(max_sev_asid, GFP_KERNEL);
B
Brijesh Singh 已提交
1232 1233 1234
	if (!sev_asid_bitmap)
		return 1;

B
Brijesh Singh 已提交
1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256
	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;
}

1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292
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);

	if (control->pause_filter_count != old)
		mark_dirty(svm->vmcb, VMCB_INTERCEPTS);

	trace_kvm_ple_window_grow(vcpu->vcpu_id,
				  control->pause_filter_count, old);
}

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);
	if (control->pause_filter_count != old)
		mark_dirty(svm->vmcb, VMCB_INTERCEPTS);

	trace_kvm_ple_window_shrink(vcpu->vcpu_id,
				    control->pause_filter_count, old);
}

A
Avi Kivity 已提交
1293 1294 1295 1296
static __init int svm_hardware_setup(void)
{
	int cpu;
	struct page *iopm_pages;
1297
	void *iopm_va;
A
Avi Kivity 已提交
1298 1299 1300 1301 1302 1303
	int r;

	iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);

	if (!iopm_pages)
		return -ENOMEM;
1304 1305 1306

	iopm_va = page_address(iopm_pages);
	memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
A
Avi Kivity 已提交
1307 1308
	iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;

1309 1310
	init_msrpm_offsets();

1311 1312 1313
	if (boot_cpu_has(X86_FEATURE_NX))
		kvm_enable_efer_bits(EFER_NX);

A
Alexander Graf 已提交
1314 1315 1316
	if (boot_cpu_has(X86_FEATURE_FXSR_OPT))
		kvm_enable_efer_bits(EFER_FFXSR);

1317 1318
	if (boot_cpu_has(X86_FEATURE_TSCRATEMSR)) {
		kvm_has_tsc_control = true;
1319 1320
		kvm_max_tsc_scaling_ratio = TSC_RATIO_MAX;
		kvm_tsc_scaling_ratio_frac_bits = 32;
1321 1322
	}

1323 1324 1325 1326 1327 1328 1329 1330
	/* 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;
	}

1331 1332
	if (nested) {
		printk(KERN_INFO "kvm: Nested Virtualization enabled\n");
1333
		kvm_enable_efer_bits(EFER_SVME | EFER_LMSLE);
1334 1335
	}

B
Brijesh Singh 已提交
1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346
	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
1347
	for_each_possible_cpu(cpu) {
A
Avi Kivity 已提交
1348 1349
		r = svm_cpu_init(cpu);
		if (r)
1350
			goto err;
A
Avi Kivity 已提交
1351
	}
1352

1353
	if (!boot_cpu_has(X86_FEATURE_NPT))
1354 1355
		npt_enabled = false;

1356 1357 1358 1359 1360
	if (npt_enabled && !npt) {
		printk(KERN_INFO "kvm: Nested Paging disabled\n");
		npt_enabled = false;
	}

1361
	if (npt_enabled) {
1362
		printk(KERN_INFO "kvm: Nested Paging enabled\n");
1363
		kvm_enable_tdp();
1364 1365
	} else
		kvm_disable_tdp();
1366

1367 1368 1369
	if (avic) {
		if (!npt_enabled ||
		    !boot_cpu_has(X86_FEATURE_AVIC) ||
1370
		    !IS_ENABLED(CONFIG_X86_LOCAL_APIC)) {
1371
			avic = false;
1372
		} else {
1373
			pr_info("AVIC enabled\n");
1374 1375 1376

			amd_iommu_register_ga_log_notifier(&avic_ga_log_notifier);
		}
1377
	}
1378

1379 1380
	if (vls) {
		if (!npt_enabled ||
1381
		    !boot_cpu_has(X86_FEATURE_V_VMSAVE_VMLOAD) ||
1382 1383 1384 1385 1386 1387 1388
		    !IS_ENABLED(CONFIG_X86_64)) {
			vls = false;
		} else {
			pr_info("Virtual VMLOAD VMSAVE supported\n");
		}
	}

1389 1390 1391 1392 1393 1394 1395
	if (vgif) {
		if (!boot_cpu_has(X86_FEATURE_VGIF))
			vgif = false;
		else
			pr_info("Virtual GIF supported\n");
	}

A
Avi Kivity 已提交
1396 1397
	return 0;

1398
err:
A
Avi Kivity 已提交
1399 1400 1401 1402 1403 1404 1405
	__free_pages(iopm_pages, IOPM_ALLOC_ORDER);
	iopm_base = 0;
	return r;
}

static __exit void svm_hardware_unsetup(void)
{
1406 1407
	int cpu;

B
Brijesh Singh 已提交
1408
	if (svm_sev_enabled())
1409
		bitmap_free(sev_asid_bitmap);
B
Brijesh Singh 已提交
1410

Z
Zachary Amsden 已提交
1411
	for_each_possible_cpu(cpu)
1412 1413
		svm_cpu_uninit(cpu);

A
Avi Kivity 已提交
1414
	__free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
1415
	iopm_base = 0;
A
Avi Kivity 已提交
1416 1417 1418 1419 1420 1421
}

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
1422
		      SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
A
Avi Kivity 已提交
1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434
	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;
}

1435 1436 1437 1438 1439 1440 1441 1442 1443 1444
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;
}

1445
static u64 svm_write_l1_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
1446 1447 1448 1449
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u64 g_tsc_offset = 0;

1450
	if (is_guest_mode(vcpu)) {
1451
		/* Write L1's TSC offset.  */
1452 1453 1454
		g_tsc_offset = svm->vmcb->control.tsc_offset -
			       svm->nested.hsave->control.tsc_offset;
		svm->nested.hsave->control.tsc_offset = offset;
1455 1456 1457 1458 1459
	}

	trace_kvm_write_tsc_offset(vcpu->vcpu_id,
				   svm->vmcb->control.tsc_offset - g_tsc_offset,
				   offset);
1460 1461

	svm->vmcb->control.tsc_offset = offset + g_tsc_offset;
1462 1463

	mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
1464
	return svm->vmcb->control.tsc_offset;
1465 1466
}

1467 1468 1469
static void avic_init_vmcb(struct vcpu_svm *svm)
{
	struct vmcb *vmcb = svm->vmcb;
1470
	struct kvm_svm *kvm_svm = to_kvm_svm(svm->vcpu.kvm);
1471
	phys_addr_t bpa = __sme_set(page_to_phys(svm->avic_backing_page));
1472 1473
	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));
1474 1475 1476 1477 1478 1479 1480 1481

	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
1482
static void init_vmcb(struct vcpu_svm *svm)
A
Avi Kivity 已提交
1483
{
1484 1485
	struct vmcb_control_area *control = &svm->vmcb->control;
	struct vmcb_save_area *save = &svm->vmcb->save;
A
Avi Kivity 已提交
1486

1487
	svm->vcpu.arch.hflags = 0;
1488

1489 1490 1491 1492 1493 1494
	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);
1495 1496
	if (!kvm_vcpu_apicv_active(&svm->vcpu))
		set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
A
Avi Kivity 已提交
1497

1498
	set_dr_intercepts(svm);
A
Avi Kivity 已提交
1499

1500 1501 1502
	set_exception_intercept(svm, PF_VECTOR);
	set_exception_intercept(svm, UD_VECTOR);
	set_exception_intercept(svm, MC_VECTOR);
1503
	set_exception_intercept(svm, AC_VECTOR);
1504
	set_exception_intercept(svm, DB_VECTOR);
1505 1506 1507 1508 1509 1510 1511 1512
	/*
	 * 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
1513

1514 1515 1516 1517
	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
1518
	set_intercept(svm, INTERCEPT_RDPMC);
1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534
	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
1535
	set_intercept(svm, INTERCEPT_XSETBV);
B
Brijesh Singh 已提交
1536
	set_intercept(svm, INTERCEPT_RSM);
A
Avi Kivity 已提交
1537

1538
	if (!kvm_mwait_in_guest(svm->vcpu.kvm)) {
1539 1540 1541 1542
		set_intercept(svm, INTERCEPT_MONITOR);
		set_intercept(svm, INTERCEPT_MWAIT);
	}

1543 1544 1545
	if (!kvm_hlt_in_guest(svm->vcpu.kvm))
		set_intercept(svm, INTERCEPT_HLT);

1546 1547
	control->iopm_base_pa = __sme_set(iopm_base);
	control->msrpm_base_pa = __sme_set(__pa(svm->msrpm));
A
Avi Kivity 已提交
1548 1549 1550 1551 1552 1553 1554 1555 1556
	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;
1557
	save->cs.base = 0xffff0000;
A
Avi Kivity 已提交
1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568
	/* 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
1569
	svm_set_efer(&svm->vcpu, 0);
M
Mike Day 已提交
1570
	save->dr6 = 0xffff0ff0;
1571
	kvm_set_rflags(&svm->vcpu, 2);
A
Avi Kivity 已提交
1572
	save->rip = 0x0000fff0;
1573
	svm->vcpu.arch.regs[VCPU_REGS_RIP] = save->rip;
A
Avi Kivity 已提交
1574

J
Joerg Roedel 已提交
1575
	/*
1576
	 * svm_set_cr0() sets PG and WP and clears NW and CD on save->cr0.
1577
	 * It also updates the guest-visible cr0 value.
A
Avi Kivity 已提交
1578
	 */
1579
	svm_set_cr0(&svm->vcpu, X86_CR0_NW | X86_CR0_CD | X86_CR0_ET);
1580
	kvm_mmu_reset_context(&svm->vcpu);
1581

1582
	save->cr4 = X86_CR4_PAE;
A
Avi Kivity 已提交
1583
	/* rdx = ?? */
1584 1585 1586

	if (npt_enabled) {
		/* Setup VMCB for Nested Paging */
1587
		control->nested_ctl |= SVM_NESTED_CTL_NP_ENABLE;
1588
		clr_intercept(svm, INTERCEPT_INVLPG);
1589
		clr_exception_intercept(svm, PF_VECTOR);
1590 1591
		clr_cr_intercept(svm, INTERCEPT_CR3_READ);
		clr_cr_intercept(svm, INTERCEPT_CR3_WRITE);
1592
		save->g_pat = svm->vcpu.arch.pat;
1593 1594 1595
		save->cr3 = 0;
		save->cr4 = 0;
	}
1596
	svm->asid_generation = 0;
1597

1598
	svm->nested.vmcb = 0;
1599 1600
	svm->vcpu.arch.hflags = 0;

1601 1602 1603 1604
	if (pause_filter_count) {
		control->pause_filter_count = pause_filter_count;
		if (pause_filter_thresh)
			control->pause_filter_thresh = pause_filter_thresh;
1605
		set_intercept(svm, INTERCEPT_PAUSE);
1606 1607
	} else {
		clr_intercept(svm, INTERCEPT_PAUSE);
1608 1609
	}

1610
	if (kvm_vcpu_apicv_active(&svm->vcpu))
1611 1612
		avic_init_vmcb(svm);

1613 1614 1615 1616 1617 1618 1619 1620 1621 1622
	/*
	 * 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;
	}

1623 1624 1625 1626 1627 1628
	if (vgif) {
		clr_intercept(svm, INTERCEPT_STGI);
		clr_intercept(svm, INTERCEPT_CLGI);
		svm->vmcb->control.int_ctl |= V_GIF_ENABLE_MASK;
	}

1629
	if (sev_guest(svm->vcpu.kvm)) {
B
Brijesh Singh 已提交
1630
		svm->vmcb->control.nested_ctl |= SVM_NESTED_CTL_SEV_ENABLE;
1631 1632
		clr_exception_intercept(svm, UD_VECTOR);
	}
B
Brijesh Singh 已提交
1633

1634 1635
	mark_all_dirty(svm->vmcb);

1636
	enable_gif(svm);
1637 1638 1639

}

1640 1641
static u64 *avic_get_physical_id_entry(struct kvm_vcpu *vcpu,
				       unsigned int index)
1642 1643
{
	u64 *avic_physical_id_table;
1644
	struct kvm_svm *kvm_svm = to_kvm_svm(vcpu->kvm);
1645 1646 1647 1648

	if (index >= AVIC_MAX_PHYSICAL_ID_COUNT)
		return NULL;

1649
	avic_physical_id_table = page_address(kvm_svm->avic_physical_id_table_page);
1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664

	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;
1665
	int ret = 0;
1666

1667
	mutex_lock(&kvm->slots_lock);
1668
	if (kvm->arch.apic_access_page_done)
1669
		goto out;
1670

1671 1672 1673 1674
	ret = __x86_set_memory_region(kvm,
				      APIC_ACCESS_PAGE_PRIVATE_MEMSLOT,
				      APIC_DEFAULT_PHYS_BASE,
				      PAGE_SIZE);
1675
	if (ret)
1676
		goto out;
1677 1678

	kvm->arch.apic_access_page_done = true;
1679 1680 1681
out:
	mutex_unlock(&kvm->slots_lock);
	return ret;
1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708
}

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;

	new_entry = READ_ONCE(*entry);
1709 1710 1711
	new_entry = __sme_set((page_to_phys(svm->avic_backing_page) &
			      AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK) |
			      AVIC_PHYSICAL_ID_ENTRY_VALID_MASK);
1712 1713 1714 1715 1716 1717 1718
	WRITE_ONCE(*entry, new_entry);

	svm->avic_physical_id_cache = entry;

	return 0;
}

B
Brijesh Singh 已提交
1719 1720
static void __sev_asid_free(int asid)
{
1721 1722
	struct svm_cpu_data *sd;
	int cpu, pos;
B
Brijesh Singh 已提交
1723 1724 1725

	pos = asid - 1;
	clear_bit(pos, sev_asid_bitmap);
1726 1727 1728 1729 1730

	for_each_possible_cpu(cpu) {
		sd = per_cpu(svm_data, cpu);
		sd->sev_vmcbs[pos] = NULL;
	}
B
Brijesh Singh 已提交
1731 1732 1733 1734
}

static void sev_asid_free(struct kvm *kvm)
{
1735
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
B
Brijesh Singh 已提交
1736 1737 1738 1739

	__sev_asid_free(sev->asid);
}

1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770
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);
}

1771 1772 1773 1774
static struct page **sev_pin_memory(struct kvm *kvm, unsigned long uaddr,
				    unsigned long ulen, unsigned long *n,
				    int write)
{
1775
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1776 1777 1778
	unsigned long npages, npinned, size;
	unsigned long locked, lock_limit;
	struct page **pages;
1779 1780 1781 1782
	unsigned long first, last;

	if (ulen == 0 || uaddr + ulen < uaddr)
		return NULL;
1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798

	/* 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)
1799 1800
		pages = __vmalloc(size, GFP_KERNEL_ACCOUNT | __GFP_ZERO,
				  PAGE_KERNEL);
1801
	else
1802
		pages = kmalloc(size, GFP_KERNEL_ACCOUNT);
1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829

	if (!pages)
		return NULL;

	/* Pin the user virtual address. */
	npinned = get_user_pages_fast(uaddr, npages, write ? FOLL_WRITE : 0, pages);
	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)
{
1830
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851

	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);
	}
}

1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867
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);
}

1868 1869
static struct kvm *svm_vm_alloc(void)
{
1870 1871 1872
	struct kvm_svm *kvm_svm = __vmalloc(sizeof(struct kvm_svm),
					    GFP_KERNEL_ACCOUNT | __GFP_ZERO,
					    PAGE_KERNEL);
1873
	return &kvm_svm->kvm;
1874 1875 1876 1877
}

static void svm_vm_free(struct kvm *kvm)
{
1878
	vfree(to_kvm_svm(kvm));
1879 1880
}

B
Brijesh Singh 已提交
1881 1882
static void sev_vm_destroy(struct kvm *kvm)
{
1883
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1884 1885
	struct list_head *head = &sev->regions_list;
	struct list_head *pos, *q;
1886

B
Brijesh Singh 已提交
1887 1888 1889
	if (!sev_guest(kvm))
		return;

1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904
	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);

1905
	sev_unbind_asid(kvm, sev->handle);
B
Brijesh Singh 已提交
1906 1907 1908
	sev_asid_free(kvm);
}

1909 1910
static void avic_vm_destroy(struct kvm *kvm)
{
1911
	unsigned long flags;
1912
	struct kvm_svm *kvm_svm = to_kvm_svm(kvm);
1913

1914 1915 1916
	if (!avic)
		return;

1917 1918 1919 1920
	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);
1921 1922

	spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
1923
	hash_del(&kvm_svm->hnode);
1924
	spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);
1925 1926
}

B
Brijesh Singh 已提交
1927 1928 1929 1930 1931 1932
static void svm_vm_destroy(struct kvm *kvm)
{
	avic_vm_destroy(kvm);
	sev_vm_destroy(kvm);
}

1933 1934
static int avic_vm_init(struct kvm *kvm)
{
1935
	unsigned long flags;
1936
	int err = -ENOMEM;
1937 1938
	struct kvm_svm *kvm_svm = to_kvm_svm(kvm);
	struct kvm_svm *k2;
1939 1940
	struct page *p_page;
	struct page *l_page;
1941
	u32 vm_id;
1942 1943 1944 1945 1946

	if (!avic)
		return 0;

	/* Allocating physical APIC ID table (4KB) */
1947
	p_page = alloc_page(GFP_KERNEL_ACCOUNT);
1948 1949 1950
	if (!p_page)
		goto free_avic;

1951
	kvm_svm->avic_physical_id_table_page = p_page;
1952 1953 1954
	clear_page(page_address(p_page));

	/* Allocating logical APIC ID table (4KB) */
1955
	l_page = alloc_page(GFP_KERNEL_ACCOUNT);
1956 1957 1958
	if (!l_page)
		goto free_avic;

1959
	kvm_svm->avic_logical_id_table_page = l_page;
1960 1961
	clear_page(page_address(l_page));

1962
	spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
1963 1964 1965 1966 1967 1968 1969 1970
 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) {
1971 1972
		hash_for_each_possible(svm_vm_data_hash, k2, hnode, vm_id) {
			if (k2->avic_vm_id == vm_id)
1973 1974 1975
				goto again;
		}
	}
1976 1977
	kvm_svm->avic_vm_id = vm_id;
	hash_add(svm_vm_data_hash, &kvm_svm->hnode, kvm_svm->avic_vm_id);
1978 1979
	spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);

1980 1981 1982 1983 1984
	return 0;

free_avic:
	avic_vm_destroy(kvm);
	return err;
A
Avi Kivity 已提交
1985 1986
}

1987 1988
static inline int
avic_update_iommu_vcpu_affinity(struct kvm_vcpu *vcpu, int cpu, bool r)
1989
{
1990 1991 1992
	int ret = 0;
	unsigned long flags;
	struct amd_svm_iommu_ir *ir;
1993 1994
	struct vcpu_svm *svm = to_svm(vcpu);

1995 1996
	if (!kvm_arch_has_assigned_device(vcpu->kvm))
		return 0;
1997

1998 1999 2000 2001 2002
	/*
	 * 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);
2003

2004 2005
	if (list_empty(&svm->ir_list))
		goto out;
2006

2007 2008 2009 2010 2011 2012 2013 2014
	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;
2015 2016 2017 2018 2019 2020
}

static void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
	u64 entry;
	/* ID = 0xff (broadcast), ID > 0xff (reserved) */
2021
	int h_physical_id = kvm_cpu_get_apicid(cpu);
2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040
	struct vcpu_svm *svm = to_svm(vcpu);

	if (!kvm_vcpu_apicv_active(vcpu))
		return;

	if (WARN_ON(h_physical_id >= AVIC_MAX_PHYSICAL_ID_COUNT))
		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);
2041 2042
	avic_update_iommu_vcpu_affinity(vcpu, h_physical_id,
					svm->avic_is_running);
2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053
}

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));
2054 2055 2056
	if (entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK)
		avic_update_iommu_vcpu_affinity(vcpu, -1, 0);

2057 2058
	entry &= ~AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK;
	WRITE_ONCE(*(svm->avic_physical_id_cache), entry);
A
Avi Kivity 已提交
2059 2060
}

2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074
/**
 * 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);
}

2075
static void svm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event)
2076 2077
{
	struct vcpu_svm *svm = to_svm(vcpu);
2078 2079
	u32 dummy;
	u32 eax = 1;
2080

2081
	vcpu->arch.microcode_version = 0x01000065;
2082
	svm->spec_ctrl = 0;
2083
	svm->virt_spec_ctrl = 0;
2084

2085 2086 2087 2088 2089 2090
	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
2091
	init_vmcb(svm);
A
Avi Kivity 已提交
2092

2093
	kvm_cpuid(vcpu, &eax, &dummy, &dummy, &dummy, true);
2094
	kvm_register_write(vcpu, VCPU_REGS_RDX, eax);
2095 2096 2097

	if (kvm_vcpu_apicv_active(vcpu) && !init_event)
		avic_update_vapic_bar(svm, APIC_DEFAULT_PHYS_BASE);
2098 2099
}

2100 2101 2102 2103
static int avic_init_vcpu(struct vcpu_svm *svm)
{
	int ret;

2104
	if (!kvm_vcpu_apicv_active(&svm->vcpu))
2105 2106 2107 2108 2109 2110 2111 2112
		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);
2113
	svm->dfr_reg = APIC_DFR_FLAT;
2114 2115 2116 2117

	return ret;
}

R
Rusty Russell 已提交
2118
static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
A
Avi Kivity 已提交
2119
{
2120
	struct vcpu_svm *svm;
A
Avi Kivity 已提交
2121
	struct page *page;
2122
	struct page *msrpm_pages;
A
Alexander Graf 已提交
2123
	struct page *hsave_page;
A
Alexander Graf 已提交
2124
	struct page *nested_msrpm_pages;
R
Rusty Russell 已提交
2125
	int err;
A
Avi Kivity 已提交
2126

2127
	svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL_ACCOUNT);
R
Rusty Russell 已提交
2128 2129 2130 2131 2132
	if (!svm) {
		err = -ENOMEM;
		goto out;
	}

2133 2134
	svm->vcpu.arch.guest_fpu = kmem_cache_zalloc(x86_fpu_cache,
						     GFP_KERNEL_ACCOUNT);
2135 2136 2137 2138 2139 2140
	if (!svm->vcpu.arch.guest_fpu) {
		printk(KERN_ERR "kvm: failed to allocate vcpu's fpu\n");
		err = -ENOMEM;
		goto free_partial_svm;
	}

R
Rusty Russell 已提交
2141 2142 2143 2144
	err = kvm_vcpu_init(&svm->vcpu, kvm, id);
	if (err)
		goto free_svm;

2145
	err = -ENOMEM;
2146
	page = alloc_page(GFP_KERNEL_ACCOUNT);
2147
	if (!page)
R
Rusty Russell 已提交
2148
		goto uninit;
A
Avi Kivity 已提交
2149

2150
	msrpm_pages = alloc_pages(GFP_KERNEL_ACCOUNT, MSRPM_ALLOC_ORDER);
2151
	if (!msrpm_pages)
2152
		goto free_page1;
A
Alexander Graf 已提交
2153

2154
	nested_msrpm_pages = alloc_pages(GFP_KERNEL_ACCOUNT, MSRPM_ALLOC_ORDER);
A
Alexander Graf 已提交
2155
	if (!nested_msrpm_pages)
2156
		goto free_page2;
2157

2158
	hsave_page = alloc_page(GFP_KERNEL_ACCOUNT);
A
Alexander Graf 已提交
2159
	if (!hsave_page)
2160 2161
		goto free_page3;

2162 2163 2164
	err = avic_init_vcpu(svm);
	if (err)
		goto free_page4;
2165

2166 2167 2168 2169 2170
	/* 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;

2171
	svm->nested.hsave = page_address(hsave_page);
A
Alexander Graf 已提交
2172

2173 2174 2175
	svm->msrpm = page_address(msrpm_pages);
	svm_vcpu_init_msrpm(svm->msrpm);

2176
	svm->nested.msrpm = page_address(nested_msrpm_pages);
2177
	svm_vcpu_init_msrpm(svm->nested.msrpm);
A
Alexander Graf 已提交
2178

2179 2180
	svm->vmcb = page_address(page);
	clear_page(svm->vmcb);
2181
	svm->vmcb_pa = __sme_set(page_to_pfn(page) << PAGE_SHIFT);
2182
	svm->asid_generation = 0;
P
Paolo Bonzini 已提交
2183
	init_vmcb(svm);
A
Avi Kivity 已提交
2184

2185 2186
	svm_init_osvw(&svm->vcpu);

R
Rusty Russell 已提交
2187
	return &svm->vcpu;
2188

2189 2190
free_page4:
	__free_page(hsave_page);
2191 2192 2193 2194 2195 2196
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
2197 2198 2199
uninit:
	kvm_vcpu_uninit(&svm->vcpu);
free_svm:
2200 2201
	kmem_cache_free(x86_fpu_cache, svm->vcpu.arch.guest_fpu);
free_partial_svm:
2202
	kmem_cache_free(kvm_vcpu_cache, svm);
R
Rusty Russell 已提交
2203 2204
out:
	return ERR_PTR(err);
A
Avi Kivity 已提交
2205 2206
}

2207 2208 2209 2210 2211 2212 2213 2214
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
2215 2216
static void svm_free_vcpu(struct kvm_vcpu *vcpu)
{
2217 2218
	struct vcpu_svm *svm = to_svm(vcpu);

2219 2220 2221 2222 2223 2224 2225
	/*
	 * 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);

2226
	__free_page(pfn_to_page(__sme_clr(svm->vmcb_pa) >> PAGE_SHIFT));
2227
	__free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER);
2228 2229
	__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
2230
	kvm_vcpu_uninit(vcpu);
2231
	kmem_cache_free(x86_fpu_cache, svm->vcpu.arch.guest_fpu);
2232
	kmem_cache_free(kvm_vcpu_cache, svm);
A
Avi Kivity 已提交
2233 2234
}

2235
static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
A
Avi Kivity 已提交
2236
{
2237
	struct vcpu_svm *svm = to_svm(vcpu);
A
Ashok Raj 已提交
2238
	struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
2239
	int i;
2240 2241

	if (unlikely(cpu != vcpu->cpu)) {
2242
		svm->asid_generation = 0;
2243
		mark_all_dirty(svm->vmcb);
2244
	}
2245

2246 2247 2248
#ifdef CONFIG_X86_64
	rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host.gs_base);
#endif
2249 2250 2251 2252
	savesegment(fs, svm->host.fs);
	savesegment(gs, svm->host.gs);
	svm->host.ldt = kvm_read_ldt();

2253
	for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
2254
		rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
2255

2256 2257 2258 2259 2260 2261
	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);
		}
2262
	}
P
Paolo Bonzini 已提交
2263 2264 2265
	/* This assumes that the kernel never uses MSR_TSC_AUX */
	if (static_cpu_has(X86_FEATURE_RDTSCP))
		wrmsrl(MSR_TSC_AUX, svm->tsc_aux);
2266

A
Ashok Raj 已提交
2267 2268 2269 2270
	if (sd->current_vmcb != svm->vmcb) {
		sd->current_vmcb = svm->vmcb;
		indirect_branch_prediction_barrier();
	}
2271
	avic_vcpu_load(vcpu, cpu);
A
Avi Kivity 已提交
2272 2273 2274 2275
}

static void svm_vcpu_put(struct kvm_vcpu *vcpu)
{
2276
	struct vcpu_svm *svm = to_svm(vcpu);
2277 2278
	int i;

2279 2280
	avic_vcpu_put(vcpu);

2281
	++vcpu->stat.host_state_reload;
2282 2283 2284
	kvm_load_ldt(svm->host.ldt);
#ifdef CONFIG_X86_64
	loadsegment(fs, svm->host.fs);
2285
	wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gsbase);
2286
	load_gs_index(svm->host.gs);
2287
#else
2288
#ifdef CONFIG_X86_32_LAZY_GS
2289
	loadsegment(gs, svm->host.gs);
2290
#endif
2291
#endif
2292
	for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
2293
		wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
A
Avi Kivity 已提交
2294 2295
}

2296 2297 2298 2299 2300 2301 2302 2303 2304 2305
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
2306 2307
static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
{
2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318
	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
2319 2320 2321 2322
}

static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
{
2323 2324 2325
	if (to_svm(vcpu)->nmi_singlestep)
		rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);

P
Paolo Bonzini 已提交
2326
       /*
A
Andrea Gelmini 已提交
2327
        * Any change of EFLAGS.VM is accompanied by a reload of SS
P
Paolo Bonzini 已提交
2328 2329 2330
        * (caused by either a task switch or an inter-privilege IRET),
        * so we do not need to update the CPL here.
        */
2331
	to_svm(vcpu)->vmcb->save.rflags = rflags;
A
Avi Kivity 已提交
2332 2333
}

A
Avi Kivity 已提交
2334 2335 2336 2337 2338
static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
{
	switch (reg) {
	case VCPU_EXREG_PDPTR:
		BUG_ON(!npt_enabled);
2339
		load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu));
A
Avi Kivity 已提交
2340 2341 2342 2343 2344 2345
		break;
	default:
		BUG();
	}
}

2346 2347
static void svm_set_vintr(struct vcpu_svm *svm)
{
2348
	set_intercept(svm, INTERCEPT_VINTR);
2349 2350 2351 2352
}

static void svm_clear_vintr(struct vcpu_svm *svm)
{
2353
	clr_intercept(svm, INTERCEPT_VINTR);
2354 2355
}

A
Avi Kivity 已提交
2356 2357
static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
{
2358
	struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
A
Avi Kivity 已提交
2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370

	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
2371
	return NULL;
A
Avi Kivity 已提交
2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395
}

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;
2396 2397 2398 2399 2400 2401 2402 2403 2404 2405

	/*
	 * 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;
2406

J
Joerg Roedel 已提交
2407 2408
	/*
	 * AMD's VMCB does not have an explicit unusable field, so emulate it
2409 2410
	 * for cross vendor migration purposes by "not present"
	 */
2411
	var->unusable = !var->present;
2412

2413 2414 2415 2416 2417 2418
	switch (seg) {
	case VCPU_SREG_TR:
		/*
		 * Work around a bug where the busy flag in the tr selector
		 * isn't exposed
		 */
2419
		var->type |= 0x2;
2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434
		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;
2435
	case VCPU_SREG_SS:
J
Joerg Roedel 已提交
2436 2437
		/*
		 * On AMD CPUs sometimes the DB bit in the segment
2438 2439 2440 2441 2442 2443
		 * 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;
2444
		/* This is symmetric with svm_set_segment() */
J
Jan Kiszka 已提交
2445
		var->dpl = to_svm(vcpu)->vmcb->save.cpl;
2446
		break;
2447
	}
A
Avi Kivity 已提交
2448 2449
}

2450 2451 2452 2453 2454 2455 2456
static int svm_get_cpl(struct kvm_vcpu *vcpu)
{
	struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;

	return save->cpl;
}

2457
static void svm_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2458
{
2459 2460
	struct vcpu_svm *svm = to_svm(vcpu);

2461 2462
	dt->size = svm->vmcb->save.idtr.limit;
	dt->address = svm->vmcb->save.idtr.base;
A
Avi Kivity 已提交
2463 2464
}

2465
static void svm_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2466
{
2467 2468
	struct vcpu_svm *svm = to_svm(vcpu);

2469 2470
	svm->vmcb->save.idtr.limit = dt->size;
	svm->vmcb->save.idtr.base = dt->address ;
2471
	mark_dirty(svm->vmcb, VMCB_DT);
A
Avi Kivity 已提交
2472 2473
}

2474
static void svm_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2475
{
2476 2477
	struct vcpu_svm *svm = to_svm(vcpu);

2478 2479
	dt->size = svm->vmcb->save.gdtr.limit;
	dt->address = svm->vmcb->save.gdtr.base;
A
Avi Kivity 已提交
2480 2481
}

2482
static void svm_set_gdt(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
	svm->vmcb->save.gdtr.limit = dt->size;
	svm->vmcb->save.gdtr.base = dt->address ;
2488
	mark_dirty(svm->vmcb, VMCB_DT);
A
Avi Kivity 已提交
2489 2490
}

2491 2492 2493 2494
static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
{
}

2495 2496 2497 2498
static void svm_decache_cr3(struct kvm_vcpu *vcpu)
{
}

2499
static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
2500 2501 2502
{
}

A
Avi Kivity 已提交
2503 2504 2505 2506 2507
static void update_cr0_intercept(struct vcpu_svm *svm)
{
	ulong gcr0 = svm->vcpu.arch.cr0;
	u64 *hcr0 = &svm->vmcb->save.cr0;

2508 2509
	*hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK)
		| (gcr0 & SVM_CR0_SELECTIVE_MASK);
A
Avi Kivity 已提交
2510

2511
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
2512

2513
	if (gcr0 == *hcr0) {
2514 2515
		clr_cr_intercept(svm, INTERCEPT_CR0_READ);
		clr_cr_intercept(svm, INTERCEPT_CR0_WRITE);
A
Avi Kivity 已提交
2516
	} else {
2517 2518
		set_cr_intercept(svm, INTERCEPT_CR0_READ);
		set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
A
Avi Kivity 已提交
2519 2520 2521
	}
}

A
Avi Kivity 已提交
2522 2523
static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
{
2524 2525
	struct vcpu_svm *svm = to_svm(vcpu);

2526
#ifdef CONFIG_X86_64
2527
	if (vcpu->arch.efer & EFER_LME) {
2528
		if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
2529
			vcpu->arch.efer |= EFER_LMA;
2530
			svm->vmcb->save.efer |= EFER_LMA | EFER_LME;
A
Avi Kivity 已提交
2531 2532
		}

M
Mike Day 已提交
2533
		if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) {
2534
			vcpu->arch.efer &= ~EFER_LMA;
2535
			svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME);
A
Avi Kivity 已提交
2536 2537 2538
		}
	}
#endif
2539
	vcpu->arch.cr0 = cr0;
2540 2541 2542

	if (!npt_enabled)
		cr0 |= X86_CR0_PG | X86_CR0_WP;
2543

2544 2545 2546 2547 2548 2549 2550
	/*
	 * 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);
2551
	svm->vmcb->save.cr0 = cr0;
2552
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
2553
	update_cr0_intercept(svm);
A
Avi Kivity 已提交
2554 2555
}

2556
static int svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
A
Avi Kivity 已提交
2557
{
2558
	unsigned long host_cr4_mce = cr4_read_shadow() & X86_CR4_MCE;
2559 2560
	unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4;

2561 2562 2563
	if (cr4 & X86_CR4_VMXE)
		return 1;

2564
	if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE))
2565
		svm_flush_tlb(vcpu, true);
2566

2567 2568 2569
	vcpu->arch.cr4 = cr4;
	if (!npt_enabled)
		cr4 |= X86_CR4_PAE;
2570
	cr4 |= host_cr4_mce;
2571
	to_svm(vcpu)->vmcb->save.cr4 = cr4;
2572
	mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
2573
	return 0;
A
Avi Kivity 已提交
2574 2575 2576 2577 2578
}

static void svm_set_segment(struct kvm_vcpu *vcpu,
			    struct kvm_segment *var, int seg)
{
2579
	struct vcpu_svm *svm = to_svm(vcpu);
A
Avi Kivity 已提交
2580 2581 2582 2583 2584
	struct vmcb_seg *s = svm_seg(vcpu, seg);

	s->base = var->base;
	s->limit = var->limit;
	s->selector = var->selector;
2585 2586 2587 2588 2589 2590 2591 2592
	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
2593 2594 2595 2596 2597 2598 2599 2600

	/*
	 * 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)
2601 2602
		/* This is symmetric with svm_get_segment() */
		svm->vmcb->save.cpl = (var->dpl & 3);
A
Avi Kivity 已提交
2603

2604
	mark_dirty(svm->vmcb, VMCB_SEG);
A
Avi Kivity 已提交
2605 2606
}

2607
static void update_bp_intercept(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
2608
{
J
Jan Kiszka 已提交
2609 2610
	struct vcpu_svm *svm = to_svm(vcpu);

2611
	clr_exception_intercept(svm, BP_VECTOR);
2612

J
Jan Kiszka 已提交
2613 2614
	if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) {
		if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
2615
			set_exception_intercept(svm, BP_VECTOR);
J
Jan Kiszka 已提交
2616 2617
	} else
		vcpu->guest_debug = 0;
2618 2619
}

2620
static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd)
A
Avi Kivity 已提交
2621
{
2622 2623
	if (sd->next_asid > sd->max_asid) {
		++sd->asid_generation;
2624
		sd->next_asid = sd->min_asid;
2625
		svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
A
Avi Kivity 已提交
2626 2627
	}

2628 2629
	svm->asid_generation = sd->asid_generation;
	svm->vmcb->control.asid = sd->next_asid++;
2630 2631

	mark_dirty(svm->vmcb, VMCB_ASID);
A
Avi Kivity 已提交
2632 2633
}

J
Jan Kiszka 已提交
2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646
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);
}

2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661
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);
}

2662
static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value)
A
Avi Kivity 已提交
2663
{
2664 2665
	struct vcpu_svm *svm = to_svm(vcpu);

2666
	svm->vmcb->save.dr7 = value;
2667
	mark_dirty(svm->vmcb, VMCB_DR);
A
Avi Kivity 已提交
2668 2669
}

A
Avi Kivity 已提交
2670
static int pf_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2671
{
2672
	u64 fault_address = __sme_clr(svm->vmcb->control.exit_info_2);
2673
	u64 error_code = svm->vmcb->control.exit_info_1;
A
Avi Kivity 已提交
2674

2675
	return kvm_handle_page_fault(&svm->vcpu, error_code, fault_address,
2676 2677
			static_cpu_has(X86_FEATURE_DECODEASSISTS) ?
			svm->vmcb->control.insn_bytes : NULL,
2678 2679 2680 2681 2682
			svm->vmcb->control.insn_len);
}

static int npf_interception(struct vcpu_svm *svm)
{
2683
	u64 fault_address = __sme_clr(svm->vmcb->control.exit_info_2);
2684 2685 2686 2687
	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,
2688 2689
			static_cpu_has(X86_FEATURE_DECODEASSISTS) ?
			svm->vmcb->control.insn_bytes : NULL,
2690
			svm->vmcb->control.insn_len);
A
Avi Kivity 已提交
2691 2692
}

A
Avi Kivity 已提交
2693
static int db_interception(struct vcpu_svm *svm)
J
Jan Kiszka 已提交
2694
{
A
Avi Kivity 已提交
2695 2696
	struct kvm_run *kvm_run = svm->vcpu.run;

J
Jan Kiszka 已提交
2697
	if (!(svm->vcpu.guest_debug &
2698
	      (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) &&
J
Jan Kiszka 已提交
2699
		!svm->nmi_singlestep) {
J
Jan Kiszka 已提交
2700 2701 2702
		kvm_queue_exception(&svm->vcpu, DB_VECTOR);
		return 1;
	}
2703

J
Jan Kiszka 已提交
2704
	if (svm->nmi_singlestep) {
2705
		disable_nmi_singlestep(svm);
2706 2707 2708
	}

	if (svm->vcpu.guest_debug &
J
Joerg Roedel 已提交
2709
	    (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) {
2710 2711 2712 2713 2714 2715 2716 2717
		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
2718 2719
}

A
Avi Kivity 已提交
2720
static int bp_interception(struct vcpu_svm *svm)
J
Jan Kiszka 已提交
2721
{
A
Avi Kivity 已提交
2722 2723
	struct kvm_run *kvm_run = svm->vcpu.run;

J
Jan Kiszka 已提交
2724 2725 2726 2727 2728 2729
	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
2730
static int ud_interception(struct vcpu_svm *svm)
2731
{
W
Wanpeng Li 已提交
2732
	return handle_ud(&svm->vcpu);
2733 2734
}

2735 2736 2737 2738 2739 2740
static int ac_interception(struct vcpu_svm *svm)
{
	kvm_queue_exception_e(&svm->vcpu, AC_VECTOR, 0);
	return 1;
}

2741 2742 2743 2744 2745 2746 2747 2748
static int gp_interception(struct vcpu_svm *svm)
{
	struct kvm_vcpu *vcpu = &svm->vcpu;
	u32 error_code = svm->vmcb->control.exit_info_1;
	int er;

	WARN_ON_ONCE(!enable_vmware_backdoor);

2749
	er = kvm_emulate_instruction(vcpu,
2750 2751 2752 2753 2754 2755 2756 2757
		EMULTYPE_VMWARE | EMULTYPE_NO_UD_ON_FAIL);
	if (er == EMULATE_USER_EXIT)
		return 0;
	else if (er != EMULATE_DONE)
		kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
	return 1;
}

2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796
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;
}

2797
static void svm_handle_mce(struct vcpu_svm *svm)
2798
{
2799 2800 2801 2802 2803 2804 2805
	if (is_erratum_383()) {
		/*
		 * Erratum 383 triggered. Guest state is corrupt so kill the
		 * guest.
		 */
		pr_err("KVM: Guest triggered AMD Erratum 383\n");

2806
		kvm_make_request(KVM_REQ_TRIPLE_FAULT, &svm->vcpu);
2807 2808 2809 2810

		return;
	}

2811 2812 2813 2814 2815 2816 2817 2818
	/*
	 * 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 */

2819 2820 2821 2822 2823
	return;
}

static int mc_interception(struct vcpu_svm *svm)
{
2824 2825 2826
	return 1;
}

A
Avi Kivity 已提交
2827
static int shutdown_interception(struct vcpu_svm *svm)
2828
{
A
Avi Kivity 已提交
2829 2830
	struct kvm_run *kvm_run = svm->vcpu.run;

2831 2832 2833 2834
	/*
	 * VMCB is undefined after a SHUTDOWN intercept
	 * so reinitialize it.
	 */
2835
	clear_page(svm->vmcb);
P
Paolo Bonzini 已提交
2836
	init_vmcb(svm);
2837 2838 2839 2840 2841

	kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
	return 0;
}

A
Avi Kivity 已提交
2842
static int io_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2843
{
2844
	struct kvm_vcpu *vcpu = &svm->vcpu;
M
Mike Day 已提交
2845
	u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */
2846
	int size, in, string;
2847
	unsigned port;
A
Avi Kivity 已提交
2848

R
Rusty Russell 已提交
2849
	++svm->vcpu.stat.io_exits;
2850
	string = (io_info & SVM_IOIO_STR_MASK) != 0;
2851
	in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
2852
	if (string)
2853
		return kvm_emulate_instruction(vcpu, 0) == EMULATE_DONE;
2854

2855 2856
	port = io_info >> 16;
	size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
2857 2858
	svm->next_rip = svm->vmcb->control.exit_info_2;

2859
	return kvm_fast_pio(&svm->vcpu, size, port, in);
A
Avi Kivity 已提交
2860 2861
}

A
Avi Kivity 已提交
2862
static int nmi_interception(struct vcpu_svm *svm)
2863 2864 2865 2866
{
	return 1;
}

A
Avi Kivity 已提交
2867
static int intr_interception(struct vcpu_svm *svm)
2868 2869 2870 2871 2872
{
	++svm->vcpu.stat.irq_exits;
	return 1;
}

A
Avi Kivity 已提交
2873
static int nop_on_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2874 2875 2876 2877
{
	return 1;
}

A
Avi Kivity 已提交
2878
static int halt_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2879
{
2880
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 1;
R
Rusty Russell 已提交
2881
	return kvm_emulate_halt(&svm->vcpu);
A
Avi Kivity 已提交
2882 2883
}

A
Avi Kivity 已提交
2884
static int vmmcall_interception(struct vcpu_svm *svm)
2885
{
2886
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2887
	return kvm_emulate_hypercall(&svm->vcpu);
2888 2889
}

2890 2891 2892 2893 2894 2895 2896
static unsigned long nested_svm_get_tdp_cr3(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	return svm->nested.nested_cr3;
}

2897 2898 2899 2900 2901 2902 2903
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;

2904
	ret = kvm_vcpu_read_guest_page(vcpu, gpa_to_gfn(__sme_clr(cr3)), &pdpte,
2905
				       offset_in_page(cr3) + index * 8, 8);
2906 2907 2908 2909 2910
	if (ret)
		return 0;
	return pdpte;
}

2911 2912 2913 2914 2915
static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu,
				   unsigned long root)
{
	struct vcpu_svm *svm = to_svm(vcpu);

2916
	svm->vmcb->control.nested_cr3 = __sme_set(root);
2917
	mark_dirty(svm->vmcb, VMCB_NPT);
2918 2919
}

2920 2921
static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu,
				       struct x86_exception *fault)
2922 2923 2924
{
	struct vcpu_svm *svm = to_svm(vcpu);

2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944
	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;
2945 2946 2947 2948

	nested_svm_vmexit(svm);
}

2949
static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu)
2950
{
2951
	WARN_ON(mmu_is_nested(vcpu));
2952 2953

	vcpu->arch.mmu = &vcpu->arch.guest_mmu;
2954
	kvm_init_shadow_mmu(vcpu);
2955 2956 2957 2958 2959 2960
	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);
2961 2962 2963 2964 2965
	vcpu->arch.walk_mmu              = &vcpu->arch.nested_mmu;
}

static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu)
{
2966
	vcpu->arch.mmu = &vcpu->arch.root_mmu;
2967
	vcpu->arch.walk_mmu = &vcpu->arch.root_mmu;
2968 2969
}

2970 2971
static int nested_svm_check_permissions(struct vcpu_svm *svm)
{
2972 2973
	if (!(svm->vcpu.arch.efer & EFER_SVME) ||
	    !is_paging(&svm->vcpu)) {
2974 2975 2976 2977 2978 2979 2980 2981 2982
		kvm_queue_exception(&svm->vcpu, UD_VECTOR);
		return 1;
	}

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

2983
	return 0;
2984 2985
}

2986 2987 2988
static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
				      bool has_error_code, u32 error_code)
{
2989 2990
	int vmexit;

2991
	if (!is_guest_mode(&svm->vcpu))
2992
		return 0;
2993

2994 2995 2996 2997
	vmexit = nested_svm_intercept(svm);
	if (vmexit != NESTED_EXIT_DONE)
		return 0;

2998 2999 3000
	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;
3001 3002

	/*
3003 3004
	 * EXITINFO2 is undefined for all exception intercepts other
	 * than #PF.
3005
	 */
3006 3007
	if (svm->vcpu.arch.exception.nested_apf)
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.apf.nested_apf_token;
3008 3009
	else if (svm->vcpu.arch.exception.has_payload)
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.exception.payload;
3010 3011
	else
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2;
3012

3013
	svm->nested.exit_required = true;
3014
	return vmexit;
3015 3016
}

3017 3018
/* This function returns true if it is save to enable the irq window */
static inline bool nested_svm_intr(struct vcpu_svm *svm)
3019
{
3020
	if (!is_guest_mode(&svm->vcpu))
3021
		return true;
3022

3023
	if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
3024
		return true;
3025

3026
	if (!(svm->vcpu.arch.hflags & HF_HIF_MASK))
3027
		return false;
3028

3029 3030 3031 3032 3033 3034 3035 3036
	/*
	 * 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;

3037 3038 3039
	svm->vmcb->control.exit_code   = SVM_EXIT_INTR;
	svm->vmcb->control.exit_info_1 = 0;
	svm->vmcb->control.exit_info_2 = 0;
3040

3041 3042 3043
	if (svm->nested.intercept & 1ULL) {
		/*
		 * The #vmexit can't be emulated here directly because this
G
Guo Chao 已提交
3044
		 * code path runs with irqs and preemption disabled. A
3045 3046 3047 3048
		 * #vmexit emulation might sleep. Only signal request for
		 * the #vmexit here.
		 */
		svm->nested.exit_required = true;
3049
		trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip);
3050
		return false;
3051 3052
	}

3053
	return true;
3054 3055
}

3056 3057 3058
/* This function returns true if it is save to enable the nmi window */
static inline bool nested_svm_nmi(struct vcpu_svm *svm)
{
3059
	if (!is_guest_mode(&svm->vcpu))
3060 3061 3062 3063 3064 3065 3066 3067 3068
		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;
3069 3070
}

3071
static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, struct page **_page)
3072 3073 3074
{
	struct page *page;

3075 3076
	might_sleep();

3077
	page = kvm_vcpu_gfn_to_page(&svm->vcpu, gpa >> PAGE_SHIFT);
3078 3079 3080
	if (is_error_page(page))
		goto error;

3081 3082 3083
	*_page = page;

	return kmap(page);
3084 3085 3086 3087 3088 3089 3090

error:
	kvm_inject_gp(&svm->vcpu, 0);

	return NULL;
}

3091
static void nested_svm_unmap(struct page *page)
3092
{
3093
	kunmap(page);
3094 3095 3096
	kvm_release_page_dirty(page);
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

3195 3196 3197 3198 3199 3200
	return NESTED_EXIT_CONTINUE;
}

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

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

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

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

	vmexit = nested_svm_intercept(svm);

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

	return vmexit;
3263 3264
}

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

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

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

3304 3305 3306 3307
	trace_kvm_nested_vmexit_inject(vmcb->control.exit_code,
				       vmcb->control.exit_info_1,
				       vmcb->control.exit_info_2,
				       vmcb->control.exit_int_info,
3308 3309
				       vmcb->control.exit_int_info_err,
				       KVM_ISA_SVM);
3310

3311
	nested_vmcb = nested_svm_map(svm, svm->nested.vmcb, &page);
3312 3313 3314
	if (!nested_vmcb)
		return 1;

3315 3316
	/* Exit Guest-Mode */
	leave_guest_mode(&svm->vcpu);
3317 3318
	svm->nested.vmcb = 0;

3319
	/* Give the current vmcb to the guest */
J
Joerg Roedel 已提交
3320 3321 3322 3323 3324 3325 3326 3327
	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;
3328
	nested_vmcb->save.efer   = svm->vcpu.arch.efer;
3329
	nested_vmcb->save.cr0    = kvm_read_cr0(&svm->vcpu);
3330
	nested_vmcb->save.cr3    = kvm_read_cr3(&svm->vcpu);
J
Joerg Roedel 已提交
3331
	nested_vmcb->save.cr2    = vmcb->save.cr2;
3332
	nested_vmcb->save.cr4    = svm->vcpu.arch.cr4;
3333
	nested_vmcb->save.rflags = kvm_get_rflags(&svm->vcpu);
J
Joerg Roedel 已提交
3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349
	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;
3350 3351 3352

	if (svm->nrips_enabled)
		nested_vmcb->control.next_rip  = vmcb->control.next_rip;
3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368

	/*
	 * 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
3369 3370 3371
	nested_vmcb->control.tlb_ctl           = 0;
	nested_vmcb->control.event_inj         = 0;
	nested_vmcb->control.event_inj_err     = 0;
3372

3373 3374 3375 3376 3377
	nested_vmcb->control.pause_filter_count =
		svm->vmcb->control.pause_filter_count;
	nested_vmcb->control.pause_filter_thresh =
		svm->vmcb->control.pause_filter_thresh;

3378 3379 3380 3381 3382
	/* 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 */
3383
	copy_vmcb_control_area(vmcb, hsave);
3384

3385
	svm->vcpu.arch.tsc_offset = svm->vmcb->control.tsc_offset;
3386 3387
	kvm_clear_exception_queue(&svm->vcpu);
	kvm_clear_interrupt_queue(&svm->vcpu);
3388

3389 3390
	svm->nested.nested_cr3 = 0;

3391 3392 3393 3394 3395 3396 3397
	/* 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;
3398
	kvm_set_rflags(&svm->vcpu, hsave->save.rflags);
3399 3400 3401 3402 3403 3404 3405
	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 {
3406
		(void)kvm_set_cr3(&svm->vcpu, hsave->save.cr3);
3407 3408 3409 3410 3411 3412 3413 3414
	}
	kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, hsave->save.rax);
	kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, hsave->save.rsp);
	kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, hsave->save.rip);
	svm->vmcb->save.dr7 = 0;
	svm->vmcb->save.cpl = 0;
	svm->vmcb->control.exit_int_info = 0;

3415 3416
	mark_all_dirty(svm->vmcb);

3417
	nested_svm_unmap(page);
3418

3419
	nested_svm_uninit_mmu_context(&svm->vcpu);
3420 3421 3422
	kvm_mmu_reset_context(&svm->vcpu);
	kvm_mmu_load(&svm->vcpu);

3423 3424 3425 3426 3427 3428 3429 3430
	/*
	 * 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);

3431 3432
	return 0;
}
A
Alexander Graf 已提交
3433

3434
static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3435
{
3436 3437
	/*
	 * This function merges the msr permission bitmaps of kvm and the
G
Guo Chao 已提交
3438
	 * nested vmcb. It is optimized in that it only merges the parts where
3439 3440
	 * the kvm msr permission bitmap may contain zero bits
	 */
A
Alexander Graf 已提交
3441
	int i;
3442

3443 3444
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
		return true;
3445

3446 3447 3448
	for (i = 0; i < MSRPM_OFFSETS; i++) {
		u32 value, p;
		u64 offset;
3449

3450 3451
		if (msrpm_offsets[i] == 0xffffffff)
			break;
A
Alexander Graf 已提交
3452

3453 3454
		p      = msrpm_offsets[i];
		offset = svm->nested.vmcb_msrpm + (p * 4);
3455

3456
		if (kvm_vcpu_read_guest(&svm->vcpu, offset, &value, 4))
3457 3458 3459 3460
			return false;

		svm->nested.msrpm[p] = svm->msrpm[p] | value;
	}
A
Alexander Graf 已提交
3461

3462
	svm->vmcb->control.msrpm_base_pa = __sme_set(__pa(svm->nested.msrpm));
3463 3464

	return true;
A
Alexander Graf 已提交
3465 3466
}

3467 3468 3469 3470 3471
static bool nested_vmcb_checks(struct vmcb *vmcb)
{
	if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0)
		return false;

3472 3473 3474
	if (vmcb->control.asid == 0)
		return false;

3475 3476
	if ((vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) &&
	    !npt_enabled)
3477 3478
		return false;

3479 3480 3481
	return true;
}

L
Ladi Prosek 已提交
3482 3483
static void enter_svm_guest_mode(struct vcpu_svm *svm, u64 vmcb_gpa,
				 struct vmcb *nested_vmcb, struct page *page)
A
Alexander Graf 已提交
3484
{
3485
	if (kvm_get_rflags(&svm->vcpu) & X86_EFLAGS_IF)
A
Alexander Graf 已提交
3486 3487 3488 3489
		svm->vcpu.arch.hflags |= HF_HIF_MASK;
	else
		svm->vcpu.arch.hflags &= ~HF_HIF_MASK;

3490
	if (nested_vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) {
3491 3492 3493 3494
		svm->nested.nested_cr3 = nested_vmcb->control.nested_cr3;
		nested_svm_init_mmu_context(&svm->vcpu);
	}

A
Alexander Graf 已提交
3495 3496 3497 3498 3499 3500 3501
	/* 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;
3502
	kvm_set_rflags(&svm->vcpu, nested_vmcb->save.rflags);
A
Alexander Graf 已提交
3503 3504 3505 3506 3507 3508
	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;
3509
	} else
3510
		(void)kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3);
3511 3512 3513 3514

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

J
Joerg Roedel 已提交
3515
	svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2;
A
Alexander Graf 已提交
3516 3517 3518
	kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, nested_vmcb->save.rax);
	kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, nested_vmcb->save.rsp);
	kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, nested_vmcb->save.rip);
J
Joerg Roedel 已提交
3519

A
Alexander Graf 已提交
3520 3521 3522 3523 3524 3525 3526 3527
	/* 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;

3528
	svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa & ~0x0fffULL;
3529
	svm->nested.vmcb_iopm  = nested_vmcb->control.iopm_base_pa  & ~0x0fffULL;
A
Alexander Graf 已提交
3530

J
Joerg Roedel 已提交
3531
	/* cache intercepts */
3532
	svm->nested.intercept_cr         = nested_vmcb->control.intercept_cr;
3533
	svm->nested.intercept_dr         = nested_vmcb->control.intercept_dr;
J
Joerg Roedel 已提交
3534 3535 3536
	svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions;
	svm->nested.intercept            = nested_vmcb->control.intercept;

3537
	svm_flush_tlb(&svm->vcpu, true);
A
Alexander Graf 已提交
3538 3539 3540 3541 3542 3543
	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;

3544 3545
	if (svm->vcpu.arch.hflags & HF_VINTR_MASK) {
		/* We only want the cr8 intercept bits of the guest */
3546 3547
		clr_cr_intercept(svm, INTERCEPT_CR8_READ);
		clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
3548 3549
	}

3550
	/* We don't want to see VMMCALLs from a nested guest */
3551
	clr_intercept(svm, INTERCEPT_VMMCALL);
3552

3553 3554 3555
	svm->vcpu.arch.tsc_offset += nested_vmcb->control.tsc_offset;
	svm->vmcb->control.tsc_offset = svm->vcpu.arch.tsc_offset;

3556
	svm->vmcb->control.virt_ext = nested_vmcb->control.virt_ext;
A
Alexander Graf 已提交
3557 3558 3559 3560 3561
	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;

3562 3563 3564 3565 3566
	svm->vmcb->control.pause_filter_count =
		nested_vmcb->control.pause_filter_count;
	svm->vmcb->control.pause_filter_thresh =
		nested_vmcb->control.pause_filter_thresh;

3567
	nested_svm_unmap(page);
3568

3569 3570 3571
	/* Enter Guest-Mode */
	enter_guest_mode(&svm->vcpu);

3572 3573 3574 3575 3576 3577
	/*
	 * Merge guest and host intercepts - must be called  with vcpu in
	 * guest-mode to take affect here
	 */
	recalc_intercepts(svm);

3578
	svm->nested.vmcb = vmcb_gpa;
3579

3580
	enable_gif(svm);
A
Alexander Graf 已提交
3581

3582
	mark_all_dirty(svm->vmcb);
L
Ladi Prosek 已提交
3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649
}

static bool nested_svm_vmrun(struct vcpu_svm *svm)
{
	struct vmcb *nested_vmcb;
	struct vmcb *hsave = svm->nested.hsave;
	struct vmcb *vmcb = svm->vmcb;
	struct page *page;
	u64 vmcb_gpa;

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

	nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
	if (!nested_vmcb)
		return false;

	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;

		nested_svm_unmap(page);

		return false;
	}

	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);

	enter_svm_guest_mode(svm, vmcb_gpa, nested_vmcb, page);
3650

3651
	return true;
A
Alexander Graf 已提交
3652 3653
}

3654
static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669
{
	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
3670
static int vmload_interception(struct vcpu_svm *svm)
3671
{
3672
	struct vmcb *nested_vmcb;
3673
	struct page *page;
3674
	int ret;
3675

3676 3677 3678
	if (nested_svm_check_permissions(svm))
		return 1;

3679
	nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
3680 3681 3682
	if (!nested_vmcb)
		return 1;

3683
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3684
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3685

3686
	nested_svm_vmloadsave(nested_vmcb, svm->vmcb);
3687
	nested_svm_unmap(page);
3688

3689
	return ret;
3690 3691
}

A
Avi Kivity 已提交
3692
static int vmsave_interception(struct vcpu_svm *svm)
3693
{
3694
	struct vmcb *nested_vmcb;
3695
	struct page *page;
3696
	int ret;
3697

3698 3699 3700
	if (nested_svm_check_permissions(svm))
		return 1;

3701
	nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
3702 3703 3704
	if (!nested_vmcb)
		return 1;

3705
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3706
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3707

3708
	nested_svm_vmloadsave(svm->vmcb, nested_vmcb);
3709
	nested_svm_unmap(page);
3710

3711
	return ret;
3712 3713
}

A
Avi Kivity 已提交
3714
static int vmrun_interception(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3715 3716 3717 3718
{
	if (nested_svm_check_permissions(svm))
		return 1;

3719 3720
	/* Save rip after vmrun instruction */
	kvm_rip_write(&svm->vcpu, kvm_rip_read(&svm->vcpu) + 3);
A
Alexander Graf 已提交
3721

3722
	if (!nested_svm_vmrun(svm))
A
Alexander Graf 已提交
3723 3724
		return 1;

3725
	if (!nested_svm_vmrun_msrpm(svm))
3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737
		goto failed;

	return 1;

failed:

	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);
A
Alexander Graf 已提交
3738 3739 3740 3741

	return 1;
}

A
Avi Kivity 已提交
3742
static int stgi_interception(struct vcpu_svm *svm)
3743
{
3744 3745
	int ret;

3746 3747 3748
	if (nested_svm_check_permissions(svm))
		return 1;

3749 3750
	/*
	 * If VGIF is enabled, the STGI intercept is only added to
3751
	 * detect the opening of the SMI/NMI window; remove it now.
3752 3753 3754 3755
	 */
	if (vgif_enabled(svm))
		clr_intercept(svm, INTERCEPT_STGI);

3756
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3757
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3758
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3759

3760
	enable_gif(svm);
3761

3762
	return ret;
3763 3764
}

A
Avi Kivity 已提交
3765
static int clgi_interception(struct vcpu_svm *svm)
3766
{
3767 3768
	int ret;

3769 3770 3771 3772
	if (nested_svm_check_permissions(svm))
		return 1;

	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3773
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3774

3775
	disable_gif(svm);
3776 3777

	/* After a CLGI no interrupts should come */
3778 3779 3780 3781 3782
	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);
	}
3783

3784
	return ret;
3785 3786
}

A
Avi Kivity 已提交
3787
static int invlpga_interception(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3788 3789 3790
{
	struct kvm_vcpu *vcpu = &svm->vcpu;

3791 3792
	trace_kvm_invlpga(svm->vmcb->save.rip, kvm_register_read(&svm->vcpu, VCPU_REGS_RCX),
			  kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
3793

A
Alexander Graf 已提交
3794
	/* Let's treat INVLPGA the same as INVLPG (can be optimized!) */
3795
	kvm_mmu_invlpg(vcpu, kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
A
Alexander Graf 已提交
3796 3797

	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3798
	return kvm_skip_emulated_instruction(&svm->vcpu);
A
Alexander Graf 已提交
3799 3800
}

3801 3802
static int skinit_interception(struct vcpu_svm *svm)
{
3803
	trace_kvm_skinit(svm->vmcb->save.rip, kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
3804 3805 3806 3807 3808

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

D
David Kaplan 已提交
3809 3810
static int wbinvd_interception(struct vcpu_svm *svm)
{
3811
	return kvm_emulate_wbinvd(&svm->vcpu);
D
David Kaplan 已提交
3812 3813
}

J
Joerg Roedel 已提交
3814 3815 3816 3817 3818 3819 3820
static int xsetbv_interception(struct vcpu_svm *svm)
{
	u64 new_bv = kvm_read_edx_eax(&svm->vcpu);
	u32 index = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);

	if (kvm_set_xcr(&svm->vcpu, index, new_bv) == 0) {
		svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3821
		return kvm_skip_emulated_instruction(&svm->vcpu);
J
Joerg Roedel 已提交
3822 3823 3824 3825 3826
	}

	return 1;
}

A
Avi Kivity 已提交
3827
static int task_switch_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3828
{
3829
	u16 tss_selector;
3830 3831 3832
	int reason;
	int int_type = svm->vmcb->control.exit_int_info &
		SVM_EXITINTINFO_TYPE_MASK;
3833
	int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK;
3834 3835 3836 3837
	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;
3838 3839
	bool has_error_code = false;
	u32 error_code = 0;
3840 3841

	tss_selector = (u16)svm->vmcb->control.exit_info_1;
3842

3843 3844
	if (svm->vmcb->control.exit_info_2 &
	    (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET))
3845 3846 3847 3848
		reason = TASK_SWITCH_IRET;
	else if (svm->vmcb->control.exit_info_2 &
		 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP))
		reason = TASK_SWITCH_JMP;
3849
	else if (idt_v)
3850 3851 3852 3853
		reason = TASK_SWITCH_GATE;
	else
		reason = TASK_SWITCH_CALL;

3854 3855 3856 3857 3858 3859
	if (reason == TASK_SWITCH_GATE) {
		switch (type) {
		case SVM_EXITINTINFO_TYPE_NMI:
			svm->vcpu.arch.nmi_injected = false;
			break;
		case SVM_EXITINTINFO_TYPE_EXEPT:
3860 3861 3862 3863 3864 3865
			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;
			}
3866 3867 3868 3869 3870 3871 3872 3873 3874
			kvm_clear_exception_queue(&svm->vcpu);
			break;
		case SVM_EXITINTINFO_TYPE_INTR:
			kvm_clear_interrupt_queue(&svm->vcpu);
			break;
		default:
			break;
		}
	}
3875

3876 3877 3878
	if (reason != TASK_SWITCH_GATE ||
	    int_type == SVM_EXITINTINFO_TYPE_SOFT ||
	    (int_type == SVM_EXITINTINFO_TYPE_EXEPT &&
3879 3880
	     (int_vec == OF_VECTOR || int_vec == BP_VECTOR)))
		skip_emulated_instruction(&svm->vcpu);
3881

3882 3883 3884 3885
	if (int_type != SVM_EXITINTINFO_TYPE_SOFT)
		int_vec = -1;

	if (kvm_task_switch(&svm->vcpu, tss_selector, int_vec, reason,
3886 3887 3888 3889 3890 3891 3892
				has_error_code, error_code) == EMULATE_FAIL) {
		svm->vcpu.run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
		svm->vcpu.run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
		svm->vcpu.run->internal.ndata = 0;
		return 0;
	}
	return 1;
A
Avi Kivity 已提交
3893 3894
}

A
Avi Kivity 已提交
3895
static int cpuid_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3896
{
3897
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
3898
	return kvm_emulate_cpuid(&svm->vcpu);
A
Avi Kivity 已提交
3899 3900
}

A
Avi Kivity 已提交
3901
static int iret_interception(struct vcpu_svm *svm)
3902 3903
{
	++svm->vcpu.stat.nmi_window_exits;
3904
	clr_intercept(svm, INTERCEPT_IRET);
3905
	svm->vcpu.arch.hflags |= HF_IRET_MASK;
3906
	svm->nmi_iret_rip = kvm_rip_read(&svm->vcpu);
3907
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3908 3909 3910
	return 1;
}

A
Avi Kivity 已提交
3911
static int invlpg_interception(struct vcpu_svm *svm)
M
Marcelo Tosatti 已提交
3912
{
3913
	if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
3914
		return kvm_emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
3915 3916

	kvm_mmu_invlpg(&svm->vcpu, svm->vmcb->control.exit_info_1);
3917
	return kvm_skip_emulated_instruction(&svm->vcpu);
M
Marcelo Tosatti 已提交
3918 3919
}

A
Avi Kivity 已提交
3920
static int emulate_on_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3921
{
3922
	return kvm_emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
A
Avi Kivity 已提交
3923 3924
}

B
Brijesh Singh 已提交
3925 3926
static int rsm_interception(struct vcpu_svm *svm)
{
3927 3928
	return kvm_emulate_instruction_from_buffer(&svm->vcpu,
					rsm_ins_bytes, 2) == EMULATE_DONE;
B
Brijesh Singh 已提交
3929 3930
}

A
Avi Kivity 已提交
3931 3932 3933 3934 3935 3936 3937 3938
static int rdpmc_interception(struct vcpu_svm *svm)
{
	int err;

	if (!static_cpu_has(X86_FEATURE_NRIPS))
		return emulate_on_interception(svm);

	err = kvm_rdpmc(&svm->vcpu);
3939
	return kvm_complete_insn_gp(&svm->vcpu, err);
A
Avi Kivity 已提交
3940 3941
}

3942 3943
static bool check_selective_cr0_intercepted(struct vcpu_svm *svm,
					    unsigned long val)
3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965
{
	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;
}

3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980
#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;
3981 3982 3983 3984
	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;
3985 3986 3987 3988 3989 3990 3991

	err = 0;
	if (cr >= 16) { /* mov to cr */
		cr -= 16;
		val = kvm_register_read(&svm->vcpu, reg);
		switch (cr) {
		case 0:
3992 3993
			if (!check_selective_cr0_intercepted(svm, val))
				err = kvm_set_cr0(&svm->vcpu, val);
3994 3995 3996
			else
				return 1;

3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020
			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:
4021
			val = kvm_read_cr3(&svm->vcpu);
4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035
			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);
	}
4036
	return kvm_complete_insn_gp(&svm->vcpu, err);
4037 4038
}

4039 4040 4041 4042 4043
static int dr_interception(struct vcpu_svm *svm)
{
	int reg, dr;
	unsigned long val;

4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054
	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;
	}

4055 4056 4057 4058 4059 4060 4061
	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 */
4062 4063
		if (!kvm_require_dr(&svm->vcpu, dr - 16))
			return 1;
4064 4065 4066
		val = kvm_register_read(&svm->vcpu, reg);
		kvm_set_dr(&svm->vcpu, dr - 16, val);
	} else {
4067 4068 4069 4070
		if (!kvm_require_dr(&svm->vcpu, dr))
			return 1;
		kvm_get_dr(&svm->vcpu, dr, &val);
		kvm_register_write(&svm->vcpu, reg, val);
4071 4072
	}

4073
	return kvm_skip_emulated_instruction(&svm->vcpu);
4074 4075
}

A
Avi Kivity 已提交
4076
static int cr8_write_interception(struct vcpu_svm *svm)
4077
{
A
Avi Kivity 已提交
4078
	struct kvm_run *kvm_run = svm->vcpu.run;
A
Andre Przywara 已提交
4079
	int r;
A
Avi Kivity 已提交
4080

4081 4082
	u8 cr8_prev = kvm_get_cr8(&svm->vcpu);
	/* instruction emulation calls kvm_set_cr8() */
4083
	r = cr_interception(svm);
4084
	if (lapic_in_kernel(&svm->vcpu))
4085
		return r;
4086
	if (cr8_prev <= kvm_get_cr8(&svm->vcpu))
4087
		return r;
4088 4089 4090 4091
	kvm_run->exit_reason = KVM_EXIT_SET_TPR;
	return 0;
}

4092 4093
static int svm_get_msr_feature(struct kvm_msr_entry *msr)
{
4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105
	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;
4106 4107
}

4108
static int svm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
A
Avi Kivity 已提交
4109
{
4110 4111
	struct vcpu_svm *svm = to_svm(vcpu);

4112
	switch (msr_info->index) {
B
Brian Gerst 已提交
4113
	case MSR_STAR:
4114
		msr_info->data = svm->vmcb->save.star;
A
Avi Kivity 已提交
4115
		break;
4116
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
4117
	case MSR_LSTAR:
4118
		msr_info->data = svm->vmcb->save.lstar;
A
Avi Kivity 已提交
4119 4120
		break;
	case MSR_CSTAR:
4121
		msr_info->data = svm->vmcb->save.cstar;
A
Avi Kivity 已提交
4122 4123
		break;
	case MSR_KERNEL_GS_BASE:
4124
		msr_info->data = svm->vmcb->save.kernel_gs_base;
A
Avi Kivity 已提交
4125 4126
		break;
	case MSR_SYSCALL_MASK:
4127
		msr_info->data = svm->vmcb->save.sfmask;
A
Avi Kivity 已提交
4128 4129 4130
		break;
#endif
	case MSR_IA32_SYSENTER_CS:
4131
		msr_info->data = svm->vmcb->save.sysenter_cs;
A
Avi Kivity 已提交
4132 4133
		break;
	case MSR_IA32_SYSENTER_EIP:
4134
		msr_info->data = svm->sysenter_eip;
A
Avi Kivity 已提交
4135 4136
		break;
	case MSR_IA32_SYSENTER_ESP:
4137
		msr_info->data = svm->sysenter_esp;
A
Avi Kivity 已提交
4138
		break;
P
Paolo Bonzini 已提交
4139 4140 4141 4142 4143
	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
4144 4145 4146 4147 4148
	/*
	 * 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.
	 */
4149
	case MSR_IA32_DEBUGCTLMSR:
4150
		msr_info->data = svm->vmcb->save.dbgctl;
4151 4152
		break;
	case MSR_IA32_LASTBRANCHFROMIP:
4153
		msr_info->data = svm->vmcb->save.br_from;
4154 4155
		break;
	case MSR_IA32_LASTBRANCHTOIP:
4156
		msr_info->data = svm->vmcb->save.br_to;
4157 4158
		break;
	case MSR_IA32_LASTINTFROMIP:
4159
		msr_info->data = svm->vmcb->save.last_excp_from;
4160 4161
		break;
	case MSR_IA32_LASTINTTOIP:
4162
		msr_info->data = svm->vmcb->save.last_excp_to;
4163
		break;
A
Alexander Graf 已提交
4164
	case MSR_VM_HSAVE_PA:
4165
		msr_info->data = svm->nested.hsave_msr;
A
Alexander Graf 已提交
4166
		break;
4167
	case MSR_VM_CR:
4168
		msr_info->data = svm->nested.vm_cr_msr;
4169
		break;
4170 4171
	case MSR_IA32_SPEC_CTRL:
		if (!msr_info->host_initiated &&
4172 4173
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBRS) &&
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_SSBD))
4174 4175 4176 4177
			return 1;

		msr_info->data = svm->spec_ctrl;
		break;
4178 4179 4180 4181 4182 4183 4184
	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;
4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201
	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;
4202 4203 4204
	case MSR_F10H_DECFG:
		msr_info->data = svm->msr_decfg;
		break;
A
Avi Kivity 已提交
4205
	default:
4206
		return kvm_get_msr_common(vcpu, msr_info);
A
Avi Kivity 已提交
4207 4208 4209 4210
	}
	return 0;
}

A
Avi Kivity 已提交
4211
static int rdmsr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4212
{
4213
	u32 ecx = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
4214
	struct msr_data msr_info;
A
Avi Kivity 已提交
4215

4216 4217 4218
	msr_info.index = ecx;
	msr_info.host_initiated = false;
	if (svm_get_msr(&svm->vcpu, &msr_info)) {
4219
		trace_kvm_msr_read_ex(ecx);
4220
		kvm_inject_gp(&svm->vcpu, 0);
4221
		return 1;
4222
	} else {
4223
		trace_kvm_msr_read(ecx, msr_info.data);
4224

4225 4226 4227 4228
		kvm_register_write(&svm->vcpu, VCPU_REGS_RAX,
				   msr_info.data & 0xffffffff);
		kvm_register_write(&svm->vcpu, VCPU_REGS_RDX,
				   msr_info.data >> 32);
4229
		svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
4230
		return kvm_skip_emulated_instruction(&svm->vcpu);
A
Avi Kivity 已提交
4231 4232 4233
	}
}

4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258
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;
}

4259
static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
A
Avi Kivity 已提交
4260
{
4261 4262
	struct vcpu_svm *svm = to_svm(vcpu);

4263 4264
	u32 ecx = msr->index;
	u64 data = msr->data;
A
Avi Kivity 已提交
4265
	switch (ecx) {
P
Paolo Bonzini 已提交
4266 4267 4268 4269 4270 4271 4272
	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;
4273 4274
	case MSR_IA32_SPEC_CTRL:
		if (!msr->host_initiated &&
4275 4276
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBRS) &&
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_SSBD))
4277 4278 4279
			return 1;

		/* The STIBP bit doesn't fault even if it's not advertised */
4280
		if (data & ~(SPEC_CTRL_IBRS | SPEC_CTRL_STIBP | SPEC_CTRL_SSBD))
4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300
			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
4301 4302
	case MSR_IA32_PRED_CMD:
		if (!msr->host_initiated &&
4303
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBPB))
A
Ashok Raj 已提交
4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315 4316
			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;
4317 4318 4319 4320 4321 4322 4323 4324 4325 4326
	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
4327
	case MSR_STAR:
4328
		svm->vmcb->save.star = data;
A
Avi Kivity 已提交
4329
		break;
4330
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
4331
	case MSR_LSTAR:
4332
		svm->vmcb->save.lstar = data;
A
Avi Kivity 已提交
4333 4334
		break;
	case MSR_CSTAR:
4335
		svm->vmcb->save.cstar = data;
A
Avi Kivity 已提交
4336 4337
		break;
	case MSR_KERNEL_GS_BASE:
4338
		svm->vmcb->save.kernel_gs_base = data;
A
Avi Kivity 已提交
4339 4340
		break;
	case MSR_SYSCALL_MASK:
4341
		svm->vmcb->save.sfmask = data;
A
Avi Kivity 已提交
4342 4343 4344
		break;
#endif
	case MSR_IA32_SYSENTER_CS:
4345
		svm->vmcb->save.sysenter_cs = data;
A
Avi Kivity 已提交
4346 4347
		break;
	case MSR_IA32_SYSENTER_EIP:
4348
		svm->sysenter_eip = data;
4349
		svm->vmcb->save.sysenter_eip = data;
A
Avi Kivity 已提交
4350 4351
		break;
	case MSR_IA32_SYSENTER_ESP:
4352
		svm->sysenter_esp = data;
4353
		svm->vmcb->save.sysenter_esp = data;
A
Avi Kivity 已提交
4354
		break;
P
Paolo Bonzini 已提交
4355 4356 4357 4358 4359 4360 4361 4362 4363 4364 4365 4366
	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;
4367
	case MSR_IA32_DEBUGCTLMSR:
4368
		if (!boot_cpu_has(X86_FEATURE_LBRV)) {
4369 4370
			vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n",
				    __func__, data);
4371 4372 4373 4374 4375 4376
			break;
		}
		if (data & DEBUGCTL_RESERVED_BITS)
			return 1;

		svm->vmcb->save.dbgctl = data;
4377
		mark_dirty(svm->vmcb, VMCB_LBR);
4378 4379 4380 4381
		if (data & (1ULL<<0))
			svm_enable_lbrv(svm);
		else
			svm_disable_lbrv(svm);
4382
		break;
A
Alexander Graf 已提交
4383
	case MSR_VM_HSAVE_PA:
4384
		svm->nested.hsave_msr = data;
4385
		break;
4386
	case MSR_VM_CR:
4387
		return svm_set_vm_cr(vcpu, data);
4388
	case MSR_VM_IGNNE:
4389
		vcpu_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data);
4390
		break;
4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403 4404 4405 4406 4407 4408
	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;
	}
4409 4410 4411
	case MSR_IA32_APICBASE:
		if (kvm_vcpu_apicv_active(vcpu))
			avic_update_vapic_bar(to_svm(vcpu), data);
4412
		/* Fall through */
A
Avi Kivity 已提交
4413
	default:
4414
		return kvm_set_msr_common(vcpu, msr);
A
Avi Kivity 已提交
4415 4416 4417 4418
	}
	return 0;
}

A
Avi Kivity 已提交
4419
static int wrmsr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4420
{
4421
	struct msr_data msr;
4422 4423
	u32 ecx = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
	u64 data = kvm_read_edx_eax(&svm->vcpu);
4424

4425 4426 4427
	msr.data = data;
	msr.index = ecx;
	msr.host_initiated = false;
4428

4429
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
4430
	if (kvm_set_msr(&svm->vcpu, &msr)) {
4431
		trace_kvm_msr_write_ex(ecx, data);
4432
		kvm_inject_gp(&svm->vcpu, 0);
4433
		return 1;
4434 4435
	} else {
		trace_kvm_msr_write(ecx, data);
4436
		return kvm_skip_emulated_instruction(&svm->vcpu);
4437
	}
A
Avi Kivity 已提交
4438 4439
}

A
Avi Kivity 已提交
4440
static int msr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4441
{
R
Rusty Russell 已提交
4442
	if (svm->vmcb->control.exit_info_1)
A
Avi Kivity 已提交
4443
		return wrmsr_interception(svm);
A
Avi Kivity 已提交
4444
	else
A
Avi Kivity 已提交
4445
		return rdmsr_interception(svm);
A
Avi Kivity 已提交
4446 4447
}

A
Avi Kivity 已提交
4448
static int interrupt_window_interception(struct vcpu_svm *svm)
4449
{
4450
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
4451
	svm_clear_vintr(svm);
4452
	svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
4453
	mark_dirty(svm->vmcb, VMCB_INTR);
4454
	++svm->vcpu.stat.irq_window_exits;
4455 4456 4457
	return 1;
}

4458 4459
static int pause_interception(struct vcpu_svm *svm)
{
4460 4461 4462
	struct kvm_vcpu *vcpu = &svm->vcpu;
	bool in_kernel = (svm_get_cpl(vcpu) == 0);

4463 4464 4465
	if (pause_filter_thresh)
		grow_ple_window(vcpu);

4466
	kvm_vcpu_on_spin(vcpu, in_kernel);
4467 4468 4469
	return 1;
}

4470 4471
static int nop_interception(struct vcpu_svm *svm)
{
4472
	return kvm_skip_emulated_instruction(&(svm->vcpu));
4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 4486
}

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);
}

4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498
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
4499
	u32 index = svm->vmcb->control.exit_info_2 & 0xFF;
4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520
	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: {
4521 4522 4523
		int i;
		struct kvm_vcpu *vcpu;
		struct kvm *kvm = svm->vcpu.kvm;
4524 4525 4526
		struct kvm_lapic *apic = svm->vcpu.arch.apic;

		/*
4527 4528 4529
		 * 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.
4530
		 */
4531 4532 4533 4534 4535 4536 4537 4538 4539
		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);
		}
4540 4541 4542
		break;
	}
	case AVIC_IPI_FAILURE_INVALID_TARGET:
4543 4544
		WARN_ONCE(1, "Invalid IPI target: index=%u, vcpu=%d, icr=%#0x:%#0x\n",
			  index, svm->vcpu.vcpu_id, icrh, icrl);
4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557
		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)
{
4558
	struct kvm_svm *kvm_svm = to_kvm_svm(vcpu->kvm);
4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579
	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;
	}

4580
	logical_apic_id_table = (u32 *) page_address(kvm_svm->avic_logical_id_table_page);
4581 4582 4583 4584

	return &logical_apic_id_table[index];
}

4585
static int avic_ldr_write(struct kvm_vcpu *vcpu, u8 g_physical_id, u32 ldr)
4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597
{
	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);
4598
	new_entry |= AVIC_LOGICAL_ID_ENTRY_VALID_MASK;
4599 4600 4601 4602 4603
	WRITE_ONCE(*entry, new_entry);

	return 0;
}

4604 4605 4606 4607 4608 4609 4610
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)
4611
		clear_bit(AVIC_LOGICAL_ID_ENTRY_VALID_BIT, (unsigned long *)entry);
4612 4613
}

4614 4615
static int avic_handle_ldr_update(struct kvm_vcpu *vcpu)
{
4616
	int ret = 0;
4617 4618 4619
	struct vcpu_svm *svm = to_svm(vcpu);
	u32 ldr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_LDR);

4620 4621
	if (ldr == svm->ldr_reg)
		return 0;
4622

4623 4624 4625 4626 4627 4628
	avic_invalidate_logical_id_entry(vcpu);

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

	if (!ret)
4629
		svm->ldr_reg = ldr;
4630

4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663
	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;
}

4664
static void avic_handle_dfr_update(struct kvm_vcpu *vcpu)
4665 4666 4667 4668
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u32 dfr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_DFR);

4669 4670
	if (svm->dfr_reg == dfr)
		return;
4671

4672 4673
	avic_invalidate_logical_id_entry(vcpu);
	svm->dfr_reg = dfr;
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 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748 4749 4750
}

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 */
4751
		ret = (kvm_emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE);
4752 4753 4754 4755 4756
	}

	return ret;
}

4757
static int (*const svm_exit_handlers[])(struct vcpu_svm *svm) = {
4758 4759 4760 4761
	[SVM_EXIT_READ_CR0]			= cr_interception,
	[SVM_EXIT_READ_CR3]			= cr_interception,
	[SVM_EXIT_READ_CR4]			= cr_interception,
	[SVM_EXIT_READ_CR8]			= cr_interception,
4762
	[SVM_EXIT_CR0_SEL_WRITE]		= cr_interception,
4763
	[SVM_EXIT_WRITE_CR0]			= cr_interception,
4764 4765
	[SVM_EXIT_WRITE_CR3]			= cr_interception,
	[SVM_EXIT_WRITE_CR4]			= cr_interception,
J
Joerg Roedel 已提交
4766
	[SVM_EXIT_WRITE_CR8]			= cr8_write_interception,
4767 4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781 4782
	[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
4783 4784
	[SVM_EXIT_EXCP_BASE + DB_VECTOR]	= db_interception,
	[SVM_EXIT_EXCP_BASE + BP_VECTOR]	= bp_interception,
4785
	[SVM_EXIT_EXCP_BASE + UD_VECTOR]	= ud_interception,
J
Joerg Roedel 已提交
4786 4787
	[SVM_EXIT_EXCP_BASE + PF_VECTOR]	= pf_interception,
	[SVM_EXIT_EXCP_BASE + MC_VECTOR]	= mc_interception,
4788
	[SVM_EXIT_EXCP_BASE + AC_VECTOR]	= ac_interception,
4789
	[SVM_EXIT_EXCP_BASE + GP_VECTOR]	= gp_interception,
J
Joerg Roedel 已提交
4790
	[SVM_EXIT_INTR]				= intr_interception,
4791
	[SVM_EXIT_NMI]				= nmi_interception,
A
Avi Kivity 已提交
4792 4793
	[SVM_EXIT_SMI]				= nop_on_interception,
	[SVM_EXIT_INIT]				= nop_on_interception,
4794
	[SVM_EXIT_VINTR]			= interrupt_window_interception,
A
Avi Kivity 已提交
4795
	[SVM_EXIT_RDPMC]			= rdpmc_interception,
A
Avi Kivity 已提交
4796
	[SVM_EXIT_CPUID]			= cpuid_interception,
4797
	[SVM_EXIT_IRET]                         = iret_interception,
4798
	[SVM_EXIT_INVD]                         = emulate_on_interception,
4799
	[SVM_EXIT_PAUSE]			= pause_interception,
A
Avi Kivity 已提交
4800
	[SVM_EXIT_HLT]				= halt_interception,
M
Marcelo Tosatti 已提交
4801
	[SVM_EXIT_INVLPG]			= invlpg_interception,
A
Alexander Graf 已提交
4802
	[SVM_EXIT_INVLPGA]			= invlpga_interception,
J
Joerg Roedel 已提交
4803
	[SVM_EXIT_IOIO]				= io_interception,
A
Avi Kivity 已提交
4804 4805
	[SVM_EXIT_MSR]				= msr_interception,
	[SVM_EXIT_TASK_SWITCH]			= task_switch_interception,
4806
	[SVM_EXIT_SHUTDOWN]			= shutdown_interception,
A
Alexander Graf 已提交
4807
	[SVM_EXIT_VMRUN]			= vmrun_interception,
4808
	[SVM_EXIT_VMMCALL]			= vmmcall_interception,
4809 4810
	[SVM_EXIT_VMLOAD]			= vmload_interception,
	[SVM_EXIT_VMSAVE]			= vmsave_interception,
4811 4812
	[SVM_EXIT_STGI]				= stgi_interception,
	[SVM_EXIT_CLGI]				= clgi_interception,
4813
	[SVM_EXIT_SKINIT]			= skinit_interception,
D
David Kaplan 已提交
4814
	[SVM_EXIT_WBINVD]                       = wbinvd_interception,
4815 4816
	[SVM_EXIT_MONITOR]			= monitor_interception,
	[SVM_EXIT_MWAIT]			= mwait_interception,
J
Joerg Roedel 已提交
4817
	[SVM_EXIT_XSETBV]			= xsetbv_interception,
4818
	[SVM_EXIT_NPF]				= npf_interception,
B
Brijesh Singh 已提交
4819
	[SVM_EXIT_RSM]                          = rsm_interception,
4820 4821
	[SVM_EXIT_AVIC_INCOMPLETE_IPI]		= avic_incomplete_ipi_interception,
	[SVM_EXIT_AVIC_UNACCELERATED_ACCESS]	= avic_unaccelerated_access_interception,
A
Avi Kivity 已提交
4822 4823
};

4824
static void dump_vmcb(struct kvm_vcpu *vcpu)
4825 4826 4827 4828 4829 4830
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb_control_area *control = &svm->vmcb->control;
	struct vmcb_save_area *save = &svm->vmcb->save;

	pr_err("VMCB Control Area:\n");
4831 4832 4833 4834 4835 4836 4837
	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);
4838 4839
	pr_err("%-20s%d\n", "pause filter threshold:",
	       control->pause_filter_thresh);
4840 4841 4842 4843 4844 4845 4846 4847 4848 4849 4850 4851 4852 4853 4854
	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);
4855
	pr_err("%-20s%016llx\n", "avic_vapic_bar:", control->avic_vapic_bar);
4856 4857
	pr_err("%-20s%08x\n", "event_inj:", control->event_inj);
	pr_err("%-20s%08x\n", "event_inj_err:", control->event_inj_err);
4858
	pr_err("%-20s%lld\n", "virt_ext:", control->virt_ext);
4859
	pr_err("%-20s%016llx\n", "next_rip:", control->next_rip);
4860 4861 4862
	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);
4863
	pr_err("VMCB State Save Area:\n");
4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903
	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);
4904 4905
	pr_err("cpl:            %d                efer:         %016llx\n",
		save->cpl, save->efer);
4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929 4930 4931 4932
	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);
4933 4934
}

4935 4936 4937 4938 4939 4940 4941 4942
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
4943
static int handle_exit(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
4944
{
4945
	struct vcpu_svm *svm = to_svm(vcpu);
A
Avi Kivity 已提交
4946
	struct kvm_run *kvm_run = vcpu->run;
4947
	u32 exit_code = svm->vmcb->control.exit_code;
A
Avi Kivity 已提交
4948

4949 4950
	trace_kvm_exit(exit_code, vcpu, KVM_ISA_SVM);

4951
	if (!is_cr_intercept(svm, INTERCEPT_CR0_WRITE))
4952 4953 4954
		vcpu->arch.cr0 = svm->vmcb->save.cr0;
	if (npt_enabled)
		vcpu->arch.cr3 = svm->vmcb->save.cr3;
4955

4956 4957 4958 4959 4960 4961 4962
	if (unlikely(svm->nested.exit_required)) {
		nested_svm_vmexit(svm);
		svm->nested.exit_required = false;

		return 1;
	}

4963
	if (is_guest_mode(vcpu)) {
4964 4965
		int vmexit;

4966 4967 4968 4969
		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,
4970 4971
					svm->vmcb->control.exit_int_info_err,
					KVM_ISA_SVM);
4972

4973 4974 4975 4976 4977 4978
		vmexit = nested_svm_exit_special(svm);

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

		if (vmexit == NESTED_EXIT_DONE)
4979 4980 4981
			return 1;
	}

4982 4983
	svm_complete_interrupts(svm);

4984 4985 4986 4987
	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;
4988 4989
		pr_err("KVM: FAILED VMRUN WITH VMCB:\n");
		dump_vmcb(vcpu);
4990 4991 4992
		return 0;
	}

4993
	if (is_external_interrupt(svm->vmcb->control.exit_int_info) &&
4994
	    exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR &&
4995 4996
	    exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH &&
	    exit_code != SVM_EXIT_INTR && exit_code != SVM_EXIT_NMI)
4997
		printk(KERN_ERR "%s: unexpected exit_int_info 0x%x "
A
Avi Kivity 已提交
4998
		       "exit_code 0x%x\n",
4999
		       __func__, svm->vmcb->control.exit_int_info,
A
Avi Kivity 已提交
5000 5001
		       exit_code);

5002
	if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
J
Joe Perches 已提交
5003
	    || !svm_exit_handlers[exit_code]) {
5004
		WARN_ONCE(1, "svm: unexpected exit reason 0x%x\n", exit_code);
5005 5006
		kvm_queue_exception(vcpu, UD_VECTOR);
		return 1;
A
Avi Kivity 已提交
5007 5008
	}

A
Avi Kivity 已提交
5009
	return svm_exit_handlers[exit_code](svm);
A
Avi Kivity 已提交
5010 5011 5012 5013 5014 5015
}

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

5016 5017
	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
5018 5019 5020
	load_TR_desc();
}

5021 5022 5023 5024 5025 5026 5027 5028 5029 5030 5031 5032 5033 5034 5035 5036 5037 5038 5039 5040 5041 5042 5043 5044
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
5045
static void pre_svm_run(struct vcpu_svm *svm)
A
Avi Kivity 已提交
5046 5047 5048
{
	int cpu = raw_smp_processor_id();

5049
	struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
A
Avi Kivity 已提交
5050

5051 5052 5053
	if (sev_guest(svm->vcpu.kvm))
		return pre_sev_run(svm, cpu);

5054
	/* FIXME: handle wraparound of asid_generation */
5055 5056
	if (svm->asid_generation != sd->asid_generation)
		new_asid(svm, sd);
A
Avi Kivity 已提交
5057 5058
}

5059 5060 5061 5062 5063 5064
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;
5065
	set_intercept(svm, INTERCEPT_IRET);
5066 5067
	++vcpu->stat.nmi_injections;
}
A
Avi Kivity 已提交
5068

5069
static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
A
Avi Kivity 已提交
5070 5071 5072
{
	struct vmcb_control_area *control;

5073
	/* The following fields are ignored when AVIC is enabled */
R
Rusty Russell 已提交
5074
	control = &svm->vmcb->control;
5075
	control->int_vector = irq;
A
Avi Kivity 已提交
5076 5077 5078
	control->int_ctl &= ~V_INTR_PRIO_MASK;
	control->int_ctl |= V_IRQ_MASK |
		((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
5079
	mark_dirty(svm->vmcb, VMCB_INTR);
A
Avi Kivity 已提交
5080 5081
}

5082
static void svm_set_irq(struct kvm_vcpu *vcpu)
E
Eddie Dong 已提交
5083 5084 5085
{
	struct vcpu_svm *svm = to_svm(vcpu);

5086
	BUG_ON(!(gif_set(svm)));
5087

5088 5089 5090
	trace_kvm_inj_virq(vcpu->arch.interrupt.nr);
	++vcpu->stat.irq_injections;

5091 5092
	svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr |
		SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR;
E
Eddie Dong 已提交
5093 5094
}

5095 5096 5097 5098 5099
static inline bool svm_nested_virtualize_tpr(struct kvm_vcpu *vcpu)
{
	return is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK);
}

5100
static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
5101 5102 5103
{
	struct vcpu_svm *svm = to_svm(vcpu);

5104 5105
	if (svm_nested_virtualize_tpr(vcpu) ||
	    kvm_vcpu_apicv_active(vcpu))
5106 5107
		return;

5108 5109
	clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);

5110
	if (irr == -1)
5111 5112
		return;

5113
	if (tpr >= irr)
5114
		set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
5115
}
5116

5117
static void svm_set_virtual_apic_mode(struct kvm_vcpu *vcpu)
5118 5119 5120 5121
{
	return;
}

5122
static bool svm_get_enable_apicv(struct kvm_vcpu *vcpu)
5123
{
5124
	return avic && irqchip_split(vcpu->kvm);
5125 5126 5127 5128
}

static void svm_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr)
{
5129 5130
}

5131
static void svm_hwapic_isr_update(struct kvm_vcpu *vcpu, int max_isr)
5132
{
5133 5134
}

5135
/* Note: Currently only used by Hyper-V. */
5136
static void svm_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu)
5137
{
5138 5139 5140
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *vmcb = svm->vmcb;

5141 5142 5143 5144 5145
	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);
5146 5147
}

5148
static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
5149 5150 5151 5152
{
	return;
}

5153 5154 5155 5156 5157 5158 5159
static void svm_deliver_avic_intr(struct kvm_vcpu *vcpu, int vec)
{
	kvm_lapic_set_irr(vec, vcpu->arch.apic);
	smp_mb__after_atomic();

	if (avic_vcpu_is_running(vcpu))
		wrmsrl(SVM_AVIC_DOORBELL,
5160
		       kvm_cpu_get_apicid(vcpu->cpu));
5161 5162 5163 5164
	else
		kvm_vcpu_wake_up(vcpu);
}

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 5204 5205 5206 5207 5208 5209 5210
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.
	 */
5211
	ir = kzalloc(sizeof(struct amd_svm_iommu_ir), GFP_KERNEL_ACCOUNT);
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 5238 5239 5240 5241 5242 5243 5244 5245 5246 5247 5248 5249 5250 5251 5252 5253
	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);

	if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu)) {
		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);
5254
	vcpu_info->pi_desc_addr = __sme_set(page_to_phys((*svm)->avic_backing_page));
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 5293 5294 5295 5296 5297 5298 5299 5300 5301 5302 5303 5304
	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.
		 */
		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 */
5305 5306
			pi.base = __sme_set(page_to_phys(svm->avic_backing_page) &
					    AVIC_HPA_MASK);
5307
			pi.ga_tag = AVIC_GATAG(to_kvm_svm(kvm)->avic_vm_id,
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 5346 5347 5348 5349 5350
						     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) {
5351 5352
			trace_kvm_pi_irte_update(host_irq, svm->vcpu.vcpu_id,
						 e->gsi, vcpu_info.vector,
5353 5354 5355 5356 5357 5358 5359 5360 5361 5362 5363 5364 5365 5366 5367
						 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;
}

5368 5369 5370 5371
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
5372 5373 5374 5375 5376 5377
	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;
5378 5379
}

J
Jan Kiszka 已提交
5380 5381 5382 5383 5384 5385 5386 5387 5388 5389 5390 5391 5392
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;
5393
		set_intercept(svm, INTERCEPT_IRET);
J
Jan Kiszka 已提交
5394 5395
	} else {
		svm->vcpu.arch.hflags &= ~HF_NMI_MASK;
5396
		clr_intercept(svm, INTERCEPT_IRET);
J
Jan Kiszka 已提交
5397 5398 5399
	}
}

5400 5401 5402 5403
static int svm_interrupt_allowed(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *vmcb = svm->vmcb;
5404 5405 5406 5407 5408 5409
	int ret;

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

5410
	ret = !!(kvm_get_rflags(vcpu) & X86_EFLAGS_IF);
5411

5412
	if (is_guest_mode(vcpu))
5413 5414 5415
		return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK);

	return ret;
5416 5417
}

5418
static void enable_irq_window(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
5419
{
5420 5421
	struct vcpu_svm *svm = to_svm(vcpu);

5422 5423 5424
	if (kvm_vcpu_apicv_active(vcpu))
		return;

J
Joerg Roedel 已提交
5425 5426 5427 5428
	/*
	 * 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
5429 5430 5431
	 * 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
5432
	 */
5433
	if ((vgif_enabled(svm) || gif_set(svm)) && nested_svm_intr(svm)) {
5434 5435 5436
		svm_set_vintr(svm);
		svm_inject_irq(svm, 0x0);
	}
5437 5438
}

5439
static void enable_nmi_window(struct kvm_vcpu *vcpu)
5440
{
5441
	struct vcpu_svm *svm = to_svm(vcpu);
5442

5443 5444
	if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK))
	    == HF_NMI_MASK)
5445
		return; /* IRET will cause a vm exit */
5446

5447 5448 5449
	if (!gif_set(svm)) {
		if (vgif_enabled(svm))
			set_intercept(svm, INTERCEPT_STGI);
5450
		return; /* STGI will cause a vm exit */
5451
	}
5452 5453 5454 5455

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

J
Joerg Roedel 已提交
5456 5457 5458 5459
	/*
	 * Something prevents NMI from been injected. Single step over possible
	 * problem (IRET or exception injection or interrupt shadow)
	 */
5460
	svm->nmi_singlestep_guest_rflags = svm_get_rflags(vcpu);
J
Jan Kiszka 已提交
5461
	svm->nmi_singlestep = true;
5462
	svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);
5463 5464
}

5465 5466 5467 5468 5469
static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)
{
	return 0;
}

5470 5471 5472 5473 5474
static int svm_set_identity_map_addr(struct kvm *kvm, u64 ident_addr)
{
	return 0;
}

5475
static void svm_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa)
5476
{
5477 5478 5479 5480 5481 5482
	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--;
5483 5484
}

5485 5486 5487 5488 5489 5490 5491
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);
}

5492 5493 5494 5495
static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
{
}

5496 5497 5498 5499
static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

5500
	if (svm_nested_virtualize_tpr(vcpu))
5501 5502
		return;

5503
	if (!is_cr_intercept(svm, INTERCEPT_CR8_WRITE)) {
5504
		int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK;
5505
		kvm_set_cr8(vcpu, cr8);
5506 5507 5508
	}
}

5509 5510 5511 5512 5513
static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u64 cr8;

5514 5515
	if (svm_nested_virtualize_tpr(vcpu) ||
	    kvm_vcpu_apicv_active(vcpu))
5516 5517
		return;

5518 5519 5520 5521 5522
	cr8 = kvm_get_cr8(vcpu);
	svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
	svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK;
}

5523 5524 5525 5526 5527
static void svm_complete_interrupts(struct vcpu_svm *svm)
{
	u8 vector;
	int type;
	u32 exitintinfo = svm->vmcb->control.exit_int_info;
5528 5529 5530
	unsigned int3_injected = svm->int3_injected;

	svm->int3_injected = 0;
5531

5532 5533 5534 5535 5536 5537
	/*
	 * 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) {
5538
		svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK);
5539 5540
		kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
	}
5541

5542 5543 5544 5545 5546 5547 5548
	svm->vcpu.arch.nmi_injected = false;
	kvm_clear_exception_queue(&svm->vcpu);
	kvm_clear_interrupt_queue(&svm->vcpu);

	if (!(exitintinfo & SVM_EXITINTINFO_VALID))
		return;

5549 5550
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);

5551 5552 5553 5554 5555 5556 5557 5558
	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:
5559 5560 5561 5562 5563 5564 5565 5566 5567 5568 5569
		/*
		 * 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);
5570
			break;
5571
		}
5572 5573
		if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) {
			u32 err = svm->vmcb->control.exit_int_info_err;
5574
			kvm_requeue_exception_e(&svm->vcpu, vector, err);
5575 5576

		} else
5577
			kvm_requeue_exception(&svm->vcpu, vector);
5578 5579
		break;
	case SVM_EXITINTINFO_TYPE_INTR:
5580
		kvm_queue_interrupt(&svm->vcpu, vector, false);
5581 5582 5583 5584 5585 5586
		break;
	default:
		break;
	}
}

A
Avi Kivity 已提交
5587 5588 5589 5590 5591 5592 5593 5594 5595 5596 5597
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
5598
static void svm_vcpu_run(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
5599
{
5600
	struct vcpu_svm *svm = to_svm(vcpu);
5601

5602 5603 5604 5605
	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];

5606 5607 5608 5609 5610 5611 5612
	/*
	 * A vmexit emulation is required before the vcpu can be executed
	 * again.
	 */
	if (unlikely(svm->nested.exit_required))
		return;

5613 5614 5615 5616 5617 5618 5619 5620 5621 5622 5623 5624 5625 5626 5627 5628
	/*
	 * 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
5629
	pre_svm_run(svm);
A
Avi Kivity 已提交
5630

5631 5632
	sync_lapic_to_cr8(vcpu);

5633
	svm->vmcb->save.cr2 = vcpu->arch.cr2;
A
Avi Kivity 已提交
5634

5635 5636
	clgi();

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 5782 5783 5784 5785

	stgi();

	/* Any pending NMI will happen here */

	if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
5786
		kvm_after_interrupt(&svm->vcpu);
5787

5788 5789
	sync_cr8_to_lapic(vcpu);

5790
	svm->next_rip = 0;
5791

5792 5793
	svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;

G
Gleb Natapov 已提交
5794 5795
	/* if exit due to PF check for async PF */
	if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR)
5796
		svm->vcpu.arch.apf.host_apf_reason = kvm_read_and_reset_pf_reason();
G
Gleb Natapov 已提交
5797

A
Avi Kivity 已提交
5798 5799 5800 5801
	if (npt_enabled) {
		vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR);
		vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR);
	}
5802 5803 5804 5805 5806 5807 5808 5809

	/*
	 * 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);
5810 5811

	mark_all_clean(svm->vmcb);
A
Avi Kivity 已提交
5812
}
5813
STACK_FRAME_NON_STANDARD(svm_vcpu_run);
A
Avi Kivity 已提交
5814 5815 5816

static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
{
5817 5818
	struct vcpu_svm *svm = to_svm(vcpu);

5819
	svm->vmcb->save.cr3 = __sme_set(root);
5820
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
5821 5822
}

5823 5824 5825 5826
static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root)
{
	struct vcpu_svm *svm = to_svm(vcpu);

5827
	svm->vmcb->control.nested_cr3 = __sme_set(root);
5828
	mark_dirty(svm->vmcb, VMCB_NPT);
5829 5830

	/* Also sync guest cr3 here in case we live migrate */
5831
	svm->vmcb->save.cr3 = kvm_read_cr3(vcpu);
5832
	mark_dirty(svm->vmcb, VMCB_CR);
5833 5834
}

A
Avi Kivity 已提交
5835 5836
static int is_disabled(void)
{
5837 5838 5839 5840 5841 5842
	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
5843 5844 5845
	return 0;
}

I
Ingo Molnar 已提交
5846 5847 5848 5849 5850 5851 5852 5853 5854 5855 5856
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;
}

Y
Yang, Sheng 已提交
5857 5858 5859 5860 5861
static void svm_check_processor_compat(void *rtn)
{
	*(int *)rtn = 0;
}

5862 5863 5864 5865 5866
static bool svm_cpu_has_accelerated_tpr(void)
{
	return false;
}

5867
static bool svm_has_emulated_msr(int index)
5868
{
5869 5870 5871 5872 5873 5874 5875
	switch (index) {
	case MSR_IA32_MCG_EXT_CTL:
		return false;
	default:
		break;
	}

5876 5877 5878
	return true;
}

5879 5880 5881 5882 5883
static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
{
	return 0;
}

5884 5885
static void svm_cpuid_update(struct kvm_vcpu *vcpu)
{
5886 5887 5888
	struct vcpu_svm *svm = to_svm(vcpu);

	/* Update nrips enabled cache */
5889
	svm->nrips_enabled = !!guest_cpuid_has(&svm->vcpu, X86_FEATURE_NRIPS);
5890 5891 5892 5893

	if (!kvm_vcpu_apicv_active(vcpu))
		return;

5894
	guest_cpuid_clear(vcpu, X86_FEATURE_X2APIC);
5895 5896
}

5897 5898
static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
{
5899
	switch (func) {
5900 5901 5902 5903
	case 0x1:
		if (avic)
			entry->ecx &= ~bit(X86_FEATURE_X2APIC);
		break;
5904 5905 5906 5907
	case 0x80000001:
		if (nested)
			entry->ecx |= (1 << 2); /* Set SVM bit */
		break;
5908 5909 5910 5911 5912
	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 */
5913 5914 5915 5916
		entry->edx = 0; /* Per default do not support any
				   additional features */

		/* Support next_rip if host supports it */
5917
		if (boot_cpu_has(X86_FEATURE_NRIPS))
5918
			entry->edx |= SVM_FEATURE_NRIP;
5919

5920 5921 5922 5923
		/* Support NPT for the guest if enabled */
		if (npt_enabled)
			entry->edx |= SVM_FEATURE_NPT;

5924
		break;
5925 5926 5927 5928 5929 5930
	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);

5931
	}
5932 5933
}

5934
static int svm_get_lpage_level(void)
5935
{
5936
	return PT_PDPE_LEVEL;
5937 5938
}

5939 5940
static bool svm_rdtscp_supported(void)
{
P
Paolo Bonzini 已提交
5941
	return boot_cpu_has(X86_FEATURE_RDTSCP);
5942 5943
}

5944 5945 5946 5947 5948
static bool svm_invpcid_supported(void)
{
	return false;
}

5949 5950 5951 5952 5953
static bool svm_mpx_supported(void)
{
	return false;
}

5954 5955 5956 5957 5958
static bool svm_xsaves_supported(void)
{
	return false;
}

5959 5960 5961 5962 5963
static bool svm_umip_emulated(void)
{
	return false;
}

5964 5965 5966 5967 5968
static bool svm_pt_supported(void)
{
	return false;
}

5969 5970 5971 5972 5973
static bool svm_has_wbinvd_exit(void)
{
	return true;
}

5974
#define PRE_EX(exit)  { .exit_code = (exit), \
5975
			.stage = X86_ICPT_PRE_EXCEPT, }
5976
#define POST_EX(exit) { .exit_code = (exit), \
5977
			.stage = X86_ICPT_POST_EXCEPT, }
5978
#define POST_MEM(exit) { .exit_code = (exit), \
5979
			.stage = X86_ICPT_POST_MEMACCESS, }
5980

5981
static const struct __x86_intercept {
5982 5983 5984 5985 5986 5987 5988 5989
	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),
5990 5991
	[x86_intercept_dr_read]		= POST_EX(SVM_EXIT_READ_DR0),
	[x86_intercept_dr_write]	= POST_EX(SVM_EXIT_WRITE_DR0),
5992 5993 5994 5995 5996 5997 5998 5999
	[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),
6000 6001 6002 6003 6004 6005 6006 6007
	[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),
6008 6009 6010
	[x86_intercept_rdtscp]		= POST_EX(SVM_EXIT_RDTSCP),
	[x86_intercept_monitor]		= POST_MEM(SVM_EXIT_MONITOR),
	[x86_intercept_mwait]		= POST_EX(SVM_EXIT_MWAIT),
6011 6012 6013 6014 6015 6016 6017 6018 6019
	[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),
6020 6021 6022 6023 6024 6025 6026
	[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),
6027 6028 6029 6030
	[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),
6031 6032
};

6033
#undef PRE_EX
6034
#undef POST_EX
6035
#undef POST_MEM
6036

6037 6038 6039 6040
static int svm_check_intercept(struct kvm_vcpu *vcpu,
			       struct x86_instruction_info *info,
			       enum x86_intercept_stage stage)
{
6041 6042 6043 6044 6045 6046 6047 6048 6049 6050
	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];

6051
	if (stage != icpt_info.stage)
6052 6053 6054 6055 6056 6057 6058 6059 6060 6061 6062 6063 6064 6065
		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;

6066 6067
		if (icpt_info.exit_code != SVM_EXIT_WRITE_CR0 ||
		    info->intercept == x86_intercept_clts)
6068 6069 6070 6071 6072 6073 6074 6075 6076 6077 6078 6079 6080 6081 6082 6083 6084 6085 6086 6087 6088 6089 6090
			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;
	}
6091 6092 6093 6094
	case SVM_EXIT_READ_DR0:
	case SVM_EXIT_WRITE_DR0:
		icpt_info.exit_code += info->modrm_reg;
		break;
6095 6096 6097 6098 6099 6100
	case SVM_EXIT_MSR:
		if (info->intercept == x86_intercept_wrmsr)
			vmcb->control.exit_info_1 = 1;
		else
			vmcb->control.exit_info_1 = 0;
		break;
6101 6102 6103 6104 6105 6106 6107
	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;
6108
		break;
6109 6110 6111 6112 6113 6114
	case SVM_EXIT_IOIO: {
		u64 exit_info;
		u32 bytes;

		if (info->intercept == x86_intercept_in ||
		    info->intercept == x86_intercept_ins) {
6115 6116
			exit_info = ((info->src_val & 0xffff) << 16) |
				SVM_IOIO_TYPE_MASK;
6117
			bytes = info->dst_bytes;
6118
		} else {
6119
			exit_info = (info->dst_val & 0xffff) << 16;
6120
			bytes = info->src_bytes;
6121 6122 6123 6124 6125 6126 6127 6128 6129 6130 6131 6132 6133 6134 6135 6136 6137 6138 6139 6140
		}

		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;
	}
6141 6142 6143 6144
	default:
		break;
	}

6145 6146 6147
	/* TODO: Advertise NRIPS to guest hypervisor unconditionally */
	if (static_cpu_has(X86_FEATURE_NRIPS))
		vmcb->control.next_rip  = info->next_rip;
6148 6149 6150 6151 6152 6153 6154 6155
	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;
6156 6157
}

6158 6159 6160
static void svm_handle_external_intr(struct kvm_vcpu *vcpu)
{
	local_irq_enable();
P
Paolo Bonzini 已提交
6161 6162 6163 6164 6165 6166
	/*
	 * We must have an instruction with interrupts enabled, so
	 * the timer interrupt isn't delayed by the interrupt shadow.
	 */
	asm("nop");
	local_irq_disable();
6167 6168
}

6169 6170
static void svm_sched_in(struct kvm_vcpu *vcpu, int cpu)
{
6171 6172
	if (pause_filter_thresh)
		shrink_ple_window(vcpu);
6173 6174
}

6175 6176 6177 6178
static inline void avic_post_state_restore(struct kvm_vcpu *vcpu)
{
	if (avic_handle_apic_id_update(vcpu) != 0)
		return;
6179
	avic_handle_dfr_update(vcpu);
6180 6181 6182
	avic_handle_ldr_update(vcpu);
}

6183 6184 6185 6186 6187 6188
static void svm_setup_mce(struct kvm_vcpu *vcpu)
{
	/* [63:9] are reserved. */
	vcpu->arch.mcg_cap &= 0x1ff;
}

6189 6190
static int svm_smi_allowed(struct kvm_vcpu *vcpu)
{
6191 6192 6193 6194 6195 6196 6197 6198 6199 6200 6201 6202 6203 6204
	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;
	}

6205 6206 6207
	return 1;
}

6208 6209
static int svm_pre_enter_smm(struct kvm_vcpu *vcpu, char *smstate)
{
6210 6211 6212 6213 6214 6215 6216 6217 6218 6219 6220 6221 6222 6223 6224 6225 6226
	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;
	}
6227 6228 6229 6230 6231
	return 0;
}

static int svm_pre_leave_smm(struct kvm_vcpu *vcpu, u64 smbase)
{
6232 6233 6234 6235 6236 6237 6238 6239 6240 6241 6242 6243 6244 6245 6246 6247 6248 6249 6250 6251 6252 6253 6254 6255
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *nested_vmcb;
	struct page *page;
	struct {
		u64 guest;
		u64 vmcb;
	} svm_state_save;
	int ret;

	ret = kvm_vcpu_read_guest(vcpu, smbase + 0xfed8, &svm_state_save,
				  sizeof(svm_state_save));
	if (ret)
		return ret;

	if (svm_state_save.guest) {
		vcpu->arch.hflags &= ~HF_SMM_MASK;
		nested_vmcb = nested_svm_map(svm, svm_state_save.vmcb, &page);
		if (nested_vmcb)
			enter_svm_guest_mode(svm, svm_state_save.vmcb, nested_vmcb, page);
		else
			ret = 1;
		vcpu->arch.hflags |= HF_SMM_MASK;
	}
	return ret;
6256 6257
}

6258 6259 6260 6261 6262 6263 6264 6265 6266 6267 6268 6269 6270
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
6271 6272 6273 6274 6275 6276 6277 6278 6279 6280 6281 6282 6283 6284 6285 6286 6287
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)
{
6288
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
B
Brijesh Singh 已提交
6289 6290 6291
	int asid, ret;

	ret = -EBUSY;
6292 6293 6294
	if (unlikely(sev->active))
		return ret;

B
Brijesh Singh 已提交
6295 6296 6297 6298 6299 6300 6301 6302 6303 6304
	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;
6305
	INIT_LIST_HEAD(&sev->regions_list);
B
Brijesh Singh 已提交
6306 6307 6308 6309 6310 6311 6312 6313

	return 0;

e_free:
	__sev_asid_free(asid);
	return ret;
}

6314 6315 6316 6317 6318 6319 6320 6321 6322 6323 6324 6325
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;

6326
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6327 6328 6329 6330 6331 6332 6333 6334 6335 6336 6337 6338
	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;
}

6339
static int __sev_issue_cmd(int fd, int id, void *data, int *error)
6340 6341 6342 6343 6344 6345 6346 6347 6348 6349 6350 6351 6352 6353
{
	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;
}

6354 6355
static int sev_issue_cmd(struct kvm *kvm, int id, void *data, int *error)
{
6356
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6357 6358 6359 6360

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

6361 6362
static int sev_launch_start(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6363
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6364 6365 6366 6367 6368 6369 6370 6371 6372 6373 6374 6375
	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;

6376
	start = kzalloc(sizeof(*start), GFP_KERNEL_ACCOUNT);
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 6404 6405 6406 6407
	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 */
6408
	ret = __sev_issue_cmd(argp->sev_fd, SEV_CMD_LAUNCH_START, start, error);
6409 6410 6411 6412 6413 6414 6415 6416 6417 6418 6419 6420 6421 6422 6423 6424 6425 6426 6427 6428 6429 6430 6431 6432 6433 6434 6435 6436
	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;
}

6437 6438
static unsigned long get_num_contig_pages(unsigned long idx,
				struct page **inpages, unsigned long npages)
6439 6440
{
	unsigned long paddr, next_paddr;
6441
	unsigned long i = idx + 1, pages = 1;
6442 6443 6444 6445 6446 6447 6448 6449 6450 6451 6452 6453 6454 6455 6456 6457 6458 6459

	/* 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)
{
6460
	unsigned long vaddr, vaddr_end, next_vaddr, npages, pages, size, i;
6461
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6462 6463 6464
	struct kvm_sev_launch_update_data params;
	struct sev_data_launch_update_data *data;
	struct page **inpages;
6465
	int ret;
6466 6467 6468 6469 6470 6471 6472

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

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

6473
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
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 6530 6531 6532 6533
	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;
}

6534 6535
static int sev_launch_measure(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6536
	void __user *measure = (void __user *)(uintptr_t)argp->data;
6537
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6538 6539
	struct sev_data_launch_measure *data;
	struct kvm_sev_launch_measure params;
6540
	void __user *p = NULL;
6541 6542 6543 6544 6545 6546
	void *blob = NULL;
	int ret;

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

6547
	if (copy_from_user(&params, measure, sizeof(params)))
6548 6549
		return -EFAULT;

6550
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6551 6552 6553 6554 6555 6556 6557
	if (!data)
		return -ENOMEM;

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

6558 6559
	p = (void __user *)(uintptr_t)params.uaddr;
	if (p) {
6560 6561 6562 6563 6564 6565 6566 6567 6568 6569 6570 6571 6572 6573 6574 6575 6576 6577 6578 6579 6580 6581 6582 6583 6584 6585 6586 6587
		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) {
6588
		if (copy_to_user(p, blob, params.len))
6589 6590 6591 6592 6593
			ret = -EFAULT;
	}

done:
	params.len = data->len;
6594
	if (copy_to_user(measure, &params, sizeof(params)))
6595 6596 6597 6598 6599 6600 6601 6602
		ret = -EFAULT;
e_free_blob:
	kfree(blob);
e_free:
	kfree(data);
	return ret;
}

6603 6604
static int sev_launch_finish(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6605
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6606 6607 6608 6609 6610 6611
	struct sev_data_launch_finish *data;
	int ret;

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

6612
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6613 6614 6615 6616 6617 6618 6619 6620 6621 6622
	if (!data)
		return -ENOMEM;

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

	kfree(data);
	return ret;
}

6623 6624
static int sev_guest_status(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6625
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6626 6627 6628 6629 6630 6631 6632
	struct kvm_sev_guest_status params;
	struct sev_data_guest_status *data;
	int ret;

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

6633
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6634 6635 6636 6637 6638 6639 6640 6641 6642 6643 6644 6645 6646 6647 6648 6649 6650 6651 6652
	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;
}

6653 6654 6655 6656
static int __sev_issue_dbg_cmd(struct kvm *kvm, unsigned long src,
			       unsigned long dst, int size,
			       int *error, bool enc)
{
6657
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6658 6659 6660
	struct sev_data_dbg *data;
	int ret;

6661
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
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 6726 6727 6728 6729
	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;
}

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 6803 6804 6805 6806
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;
}

6807 6808 6809
static int sev_dbg_crypt(struct kvm *kvm, struct kvm_sev_cmd *argp, bool dec)
{
	unsigned long vaddr, vaddr_end, next_vaddr;
6810
	unsigned long dst_vaddr;
6811 6812 6813
	struct page **src_p, **dst_p;
	struct kvm_sev_dbg debug;
	unsigned long n;
6814 6815
	unsigned int size;
	int ret;
6816 6817 6818 6819 6820 6821 6822

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

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

6823 6824 6825 6826 6827
	if (!debug.len || debug.src_uaddr + debug.len < debug.src_uaddr)
		return -EINVAL;
	if (!debug.dst_uaddr)
		return -EINVAL;

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 6860 6861 6862 6863
	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);

6864 6865 6866 6867 6868 6869 6870 6871 6872 6873 6874 6875 6876
		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);
6877

6878 6879
		sev_unpin_memory(kvm, src_p, n);
		sev_unpin_memory(kvm, dst_p, n);
6880 6881 6882 6883 6884 6885 6886 6887 6888 6889 6890 6891

		if (ret)
			goto err;

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

6892 6893
static int sev_launch_secret(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6894
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6895 6896 6897 6898 6899
	struct sev_data_launch_secret *data;
	struct kvm_sev_launch_secret params;
	struct page **pages;
	void *blob, *hdr;
	unsigned long n;
6900
	int ret, offset;
6901 6902 6903 6904 6905 6906 6907 6908 6909 6910 6911 6912 6913 6914 6915 6916 6917 6918 6919 6920 6921

	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;
6922
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6923 6924 6925
	if (!data)
		goto e_unpin_memory;

6926 6927 6928 6929
	offset = params.guest_uaddr & (PAGE_SIZE - 1);
	data->guest_address = __sme_page_pa(pages[0]) + offset;
	data->guest_len = params.guest_len;

6930 6931 6932 6933 6934 6935 6936 6937 6938 6939 6940 6941 6942 6943
	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;
	}
6944 6945
	data->hdr_address = __psp_pa(hdr);
	data->hdr_len = params.hdr_len;
6946 6947 6948 6949 6950 6951 6952 6953 6954 6955 6956 6957 6958 6959 6960

	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
6961 6962 6963 6964 6965 6966 6967 6968 6969 6970 6971 6972 6973 6974 6975 6976 6977
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;
6978 6979 6980
	case KVM_SEV_LAUNCH_START:
		r = sev_launch_start(kvm, &sev_cmd);
		break;
6981 6982 6983
	case KVM_SEV_LAUNCH_UPDATE_DATA:
		r = sev_launch_update_data(kvm, &sev_cmd);
		break;
6984 6985 6986
	case KVM_SEV_LAUNCH_MEASURE:
		r = sev_launch_measure(kvm, &sev_cmd);
		break;
6987 6988 6989
	case KVM_SEV_LAUNCH_FINISH:
		r = sev_launch_finish(kvm, &sev_cmd);
		break;
6990 6991 6992
	case KVM_SEV_GUEST_STATUS:
		r = sev_guest_status(kvm, &sev_cmd);
		break;
6993 6994 6995
	case KVM_SEV_DBG_DECRYPT:
		r = sev_dbg_crypt(kvm, &sev_cmd, true);
		break;
6996 6997 6998
	case KVM_SEV_DBG_ENCRYPT:
		r = sev_dbg_crypt(kvm, &sev_cmd, false);
		break;
6999 7000 7001
	case KVM_SEV_LAUNCH_SECRET:
		r = sev_launch_secret(kvm, &sev_cmd);
		break;
B
Brijesh Singh 已提交
7002 7003 7004 7005 7006 7007 7008 7009 7010 7011 7012 7013 7014
	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;
}

7015 7016 7017
static int svm_register_enc_region(struct kvm *kvm,
				   struct kvm_enc_region *range)
{
7018
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
7019 7020 7021 7022 7023 7024
	struct enc_region *region;
	int ret = 0;

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

7025 7026 7027
	if (range->addr > ULONG_MAX || range->size > ULONG_MAX)
		return -EINVAL;

7028
	region = kzalloc(sizeof(*region), GFP_KERNEL_ACCOUNT);
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 7059 7060 7061 7062
	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)
{
7063
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
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 7102 7103 7104 7105
	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;
}

7106 7107 7108 7109 7110 7111
static uint16_t nested_get_evmcs_version(struct kvm_vcpu *vcpu)
{
	/* Not supported */
	return 0;
}

7112 7113 7114 7115 7116 7117 7118
static int nested_enable_evmcs(struct kvm_vcpu *vcpu,
				   uint16_t *vmcs_version)
{
	/* Intel-only feature */
	return -ENODEV;
}

7119 7120 7121 7122 7123 7124 7125 7126 7127 7128 7129 7130 7131 7132 7133 7134 7135 7136 7137 7138 7139 7140 7141 7142 7143 7144 7145 7146 7147 7148
static bool svm_need_emulation_on_page_fault(struct kvm_vcpu *vcpu)
{
	bool is_user, smap;

	is_user = svm_get_cpl(vcpu) == 3;
	smap = !kvm_read_cr4_bits(vcpu, X86_CR4_SMAP);

	/*
	 * Detect and workaround Errata 1096 Fam_17h_00_0Fh
	 *
	 * 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.
	 */
	if (is_user && smap) {
		if (!sev_guest(vcpu->kvm))
			return true;

		pr_err_ratelimited("KVM: Guest triggered AMD Erratum 1096\n");
		kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
	}

	return false;
}

7149
static struct kvm_x86_ops svm_x86_ops __ro_after_init = {
A
Avi Kivity 已提交
7150 7151 7152 7153
	.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
7154
	.check_processor_compatibility = svm_check_processor_compat,
A
Avi Kivity 已提交
7155 7156
	.hardware_enable = svm_hardware_enable,
	.hardware_disable = svm_hardware_disable,
7157
	.cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr,
7158
	.has_emulated_msr = svm_has_emulated_msr,
A
Avi Kivity 已提交
7159 7160 7161

	.vcpu_create = svm_create_vcpu,
	.vcpu_free = svm_free_vcpu,
7162
	.vcpu_reset = svm_vcpu_reset,
A
Avi Kivity 已提交
7163

7164 7165
	.vm_alloc = svm_vm_alloc,
	.vm_free = svm_vm_free,
7166
	.vm_init = avic_vm_init,
B
Brijesh Singh 已提交
7167
	.vm_destroy = svm_vm_destroy,
7168

7169
	.prepare_guest_switch = svm_prepare_guest_switch,
A
Avi Kivity 已提交
7170 7171
	.vcpu_load = svm_vcpu_load,
	.vcpu_put = svm_vcpu_put,
7172 7173
	.vcpu_blocking = svm_vcpu_blocking,
	.vcpu_unblocking = svm_vcpu_unblocking,
A
Avi Kivity 已提交
7174

7175
	.update_bp_intercept = update_bp_intercept,
7176
	.get_msr_feature = svm_get_msr_feature,
A
Avi Kivity 已提交
7177 7178 7179 7180 7181
	.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,
7182
	.get_cpl = svm_get_cpl,
7183
	.get_cs_db_l_bits = kvm_get_cs_db_l_bits,
7184
	.decache_cr0_guest_bits = svm_decache_cr0_guest_bits,
7185
	.decache_cr3 = svm_decache_cr3,
7186
	.decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
A
Avi Kivity 已提交
7187 7188 7189 7190 7191 7192 7193 7194
	.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
7195 7196
	.get_dr6 = svm_get_dr6,
	.set_dr6 = svm_set_dr6,
7197
	.set_dr7 = svm_set_dr7,
7198
	.sync_dirty_debug_regs = svm_sync_dirty_debug_regs,
A
Avi Kivity 已提交
7199
	.cache_reg = svm_cache_reg,
A
Avi Kivity 已提交
7200 7201
	.get_rflags = svm_get_rflags,
	.set_rflags = svm_set_rflags,
7202

A
Avi Kivity 已提交
7203
	.tlb_flush = svm_flush_tlb,
7204
	.tlb_flush_gva = svm_flush_tlb_gva,
A
Avi Kivity 已提交
7205 7206

	.run = svm_vcpu_run,
7207
	.handle_exit = handle_exit,
A
Avi Kivity 已提交
7208
	.skip_emulated_instruction = skip_emulated_instruction,
7209 7210
	.set_interrupt_shadow = svm_set_interrupt_shadow,
	.get_interrupt_shadow = svm_get_interrupt_shadow,
I
Ingo Molnar 已提交
7211
	.patch_hypercall = svm_patch_hypercall,
E
Eddie Dong 已提交
7212
	.set_irq = svm_set_irq,
7213
	.set_nmi = svm_inject_nmi,
7214
	.queue_exception = svm_queue_exception,
A
Avi Kivity 已提交
7215
	.cancel_injection = svm_cancel_injection,
7216
	.interrupt_allowed = svm_interrupt_allowed,
7217
	.nmi_allowed = svm_nmi_allowed,
J
Jan Kiszka 已提交
7218 7219
	.get_nmi_mask = svm_get_nmi_mask,
	.set_nmi_mask = svm_set_nmi_mask,
7220 7221 7222
	.enable_nmi_window = enable_nmi_window,
	.enable_irq_window = enable_irq_window,
	.update_cr8_intercept = update_cr8_intercept,
7223
	.set_virtual_apic_mode = svm_set_virtual_apic_mode,
7224 7225
	.get_enable_apicv = svm_get_enable_apicv,
	.refresh_apicv_exec_ctrl = svm_refresh_apicv_exec_ctrl,
7226
	.load_eoi_exitmap = svm_load_eoi_exitmap,
7227 7228
	.hwapic_irr_update = svm_hwapic_irr_update,
	.hwapic_isr_update = svm_hwapic_isr_update,
7229
	.sync_pir_to_irr = kvm_lapic_find_highest_irr,
7230
	.apicv_post_state_restore = avic_post_state_restore,
7231 7232

	.set_tss_addr = svm_set_tss_addr,
7233
	.set_identity_map_addr = svm_set_identity_map_addr,
7234
	.get_tdp_level = get_npt_level,
7235
	.get_mt_mask = svm_get_mt_mask,
7236

7237 7238
	.get_exit_info = svm_get_exit_info,

7239
	.get_lpage_level = svm_get_lpage_level,
7240 7241

	.cpuid_update = svm_cpuid_update,
7242 7243

	.rdtscp_supported = svm_rdtscp_supported,
7244
	.invpcid_supported = svm_invpcid_supported,
7245
	.mpx_supported = svm_mpx_supported,
7246
	.xsaves_supported = svm_xsaves_supported,
7247
	.umip_emulated = svm_umip_emulated,
7248
	.pt_supported = svm_pt_supported,
7249 7250

	.set_supported_cpuid = svm_set_supported_cpuid,
7251 7252

	.has_wbinvd_exit = svm_has_wbinvd_exit,
7253

7254
	.read_l1_tsc_offset = svm_read_l1_tsc_offset,
7255
	.write_l1_tsc_offset = svm_write_l1_tsc_offset,
7256 7257

	.set_tdp_cr3 = set_tdp_cr3,
7258 7259

	.check_intercept = svm_check_intercept,
7260
	.handle_external_intr = svm_handle_external_intr,
7261

7262 7263
	.request_immediate_exit = __kvm_request_immediate_exit,

7264
	.sched_in = svm_sched_in,
7265 7266

	.pmu_ops = &amd_pmu_ops,
7267
	.deliver_posted_interrupt = svm_deliver_avic_intr,
7268
	.update_pi_irte = svm_update_pi_irte,
7269
	.setup_mce = svm_setup_mce,
7270

7271
	.smi_allowed = svm_smi_allowed,
7272 7273
	.pre_enter_smm = svm_pre_enter_smm,
	.pre_leave_smm = svm_pre_leave_smm,
7274
	.enable_smi_window = enable_smi_window,
B
Brijesh Singh 已提交
7275 7276

	.mem_enc_op = svm_mem_enc_op,
7277 7278
	.mem_enc_reg_region = svm_register_enc_region,
	.mem_enc_unreg_region = svm_unregister_enc_region,
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	.nested_enable_evmcs = nested_enable_evmcs,
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	.nested_get_evmcs_version = nested_get_evmcs_version,
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	.need_emulation_on_page_fault = svm_need_emulation_on_page_fault,
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};

static int __init svm_init(void)
{
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	return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm),
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			__alignof__(struct vcpu_svm), THIS_MODULE);
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}

static void __exit svm_exit(void)
{
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	kvm_exit();
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}

module_init(svm_init)
module_exit(svm_exit)