svm.c 170.5 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/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)

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 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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	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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	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)
#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
	{ .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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/* 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 void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
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static void svm_flush_tlb(struct kvm_vcpu *vcpu);
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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 bool svm_sev_enabled(void)
{
	return max_sev_asid;
}

static inline bool sev_guest(struct kvm *kvm)
{
	struct kvm_sev_info *sev = &kvm->arch.sev_info;

	return sev->active;
}
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static inline int sev_get_asid(struct kvm *kvm)
{
	struct kvm_sev_info *sev = &kvm->arch.sev_info;

	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;
	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);
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	recalc_intercepts(svm);
}

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static inline void clr_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 = 0;
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	recalc_intercepts(svm);
}

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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);
}

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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);
}

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

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static inline void enable_gif(struct vcpu_svm *svm)
{
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	if (vgif_enabled(svm))
		svm->vmcb->control.int_ctl |= V_GIF_MASK;
	else
		svm->vcpu.arch.hflags |= HF_GIF_MASK;
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}

static inline void disable_gif(struct vcpu_svm *svm)
{
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	if (vgif_enabled(svm))
		svm->vmcb->control.int_ctl &= ~V_GIF_MASK;
	else
		svm->vcpu.arch.hflags &= ~HF_GIF_MASK;
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}

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

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static unsigned long iopm_base;
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struct kvm_ldttss_desc {
	u16 limit0;
	u16 base0;
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	unsigned base1:8, type:5, dpl:2, p:1;
	unsigned limit1:4, zero0:3, g:1, base2:8;
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	u32 base3;
	u32 zero1;
} __attribute__((packed));

struct svm_cpu_data {
	int cpu;

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	u64 asid_generation;
	u32 max_asid;
	u32 next_asid;
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	u32 min_asid;
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	struct kvm_ldttss_desc *tss_desc;

	struct page *save_area;
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	/* index = sev_asid, value = vmcb pointer */
	struct vmcb **sev_vmcbs;
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};

static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);

struct svm_init_data {
	int cpu;
	int r;
};

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static const u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
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#define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges)
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#define MSRS_RANGE_SIZE 2048
#define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)

593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613
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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#define MAX_INST_SIZE 15

static inline void clgi(void)
{
618
	asm volatile (__ex(SVM_CLGI));
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}

static inline void stgi(void)
{
623
	asm volatile (__ex(SVM_STGI));
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}

static inline void invlpga(unsigned long addr, u32 asid)
{
J
Joerg Roedel 已提交
628
	asm volatile (__ex(SVM_INVLPGA) : : "a"(addr), "c"(asid));
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629 630
}

631
static int get_npt_level(struct kvm_vcpu *vcpu)
632 633
{
#ifdef CONFIG_X86_64
634
	return PT64_ROOT_4LEVEL;
635 636 637 638 639
#else
	return PT32E_ROOT_LEVEL;
#endif
}

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640 641
static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
{
642
	vcpu->arch.efer = efer;
643
	if (!npt_enabled && !(efer & EFER_LMA))
644
		efer &= ~EFER_LME;
A
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645

646
	to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME;
647
	mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
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648 649 650 651 652 653 654 655
}

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

656
static u32 svm_get_interrupt_shadow(struct kvm_vcpu *vcpu)
657 658 659 660 661
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u32 ret = 0;

	if (svm->vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK)
662 663
		ret = KVM_X86_SHADOW_INT_STI | KVM_X86_SHADOW_INT_MOV_SS;
	return ret;
664 665 666 667 668 669 670 671 672 673 674 675 676
}

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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static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
{
679 680
	struct vcpu_svm *svm = to_svm(vcpu);

681
	if (svm->vmcb->control.next_rip != 0) {
682
		WARN_ON_ONCE(!static_cpu_has(X86_FEATURE_NRIPS));
683
		svm->next_rip = svm->vmcb->control.next_rip;
684
	}
685

686
	if (!svm->next_rip) {
687
		if (emulate_instruction(vcpu, EMULTYPE_SKIP) !=
688 689
				EMULATE_DONE)
			printk(KERN_DEBUG "%s: NOP\n", __func__);
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690 691
		return;
	}
692 693 694
	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
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695

696
	kvm_rip_write(vcpu, svm->next_rip);
697
	svm_set_interrupt_shadow(vcpu, 0);
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698 699
}

700
static void svm_queue_exception(struct kvm_vcpu *vcpu)
J
Jan Kiszka 已提交
701 702
{
	struct vcpu_svm *svm = to_svm(vcpu);
703 704
	unsigned nr = vcpu->arch.exception.nr;
	bool has_error_code = vcpu->arch.exception.has_error_code;
705
	bool reinject = vcpu->arch.exception.injected;
706
	u32 error_code = vcpu->arch.exception.error_code;
J
Jan Kiszka 已提交
707

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708 709 710 711
	/*
	 * If we are within a nested VM we'd better #VMEXIT and let the guest
	 * handle the exception
	 */
712 713
	if (!reinject &&
	    nested_svm_check_exception(svm, nr, has_error_code, error_code))
J
Jan Kiszka 已提交
714 715
		return;

716
	if (nr == BP_VECTOR && !static_cpu_has(X86_FEATURE_NRIPS)) {
717 718 719 720 721 722 723 724 725 726 727 728 729 730 731
		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;
	}

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Jan Kiszka 已提交
732 733 734 735 736 737 738
	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;
}

739 740 741 742 743 744
static void svm_init_erratum_383(void)
{
	u32 low, high;
	int err;
	u64 val;

745
	if (!static_cpu_has_bug(X86_BUG_AMD_TLB_MMATCH))
746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762
		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;
}

763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783
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;
}

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784 785
static int has_svm(void)
{
786
	const char *msg;
A
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787

788
	if (!cpu_has_svm(&msg)) {
J
Joe Perches 已提交
789
		printk(KERN_INFO "has_svm: %s\n", msg);
A
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790 791 792 793 794 795
		return 0;
	}

	return 1;
}

796
static void svm_hardware_disable(void)
A
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797
{
798 799 800 801
	/* Make sure we clean up behind us */
	if (static_cpu_has(X86_FEATURE_TSCRATEMSR))
		wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);

802
	cpu_svm_disable();
803 804

	amd_pmu_disable_virt();
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805 806
}

807
static int svm_hardware_enable(void)
A
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808 809
{

810
	struct svm_cpu_data *sd;
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811 812 813 814
	uint64_t efer;
	struct desc_struct *gdt;
	int me = raw_smp_processor_id();

815 816 817 818
	rdmsrl(MSR_EFER, efer);
	if (efer & EFER_SVME)
		return -EBUSY;

A
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819
	if (!has_svm()) {
820
		pr_err("%s: err EOPNOTSUPP on %d\n", __func__, me);
821
		return -EINVAL;
A
Avi Kivity 已提交
822
	}
823 824
	sd = per_cpu(svm_data, me);
	if (!sd) {
825
		pr_err("%s: svm_data is NULL on %d\n", __func__, me);
826
		return -EINVAL;
A
Avi Kivity 已提交
827 828
	}

829 830 831
	sd->asid_generation = 1;
	sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
	sd->next_asid = sd->max_asid + 1;
832
	sd->min_asid = max_sev_asid + 1;
A
Avi Kivity 已提交
833

834
	gdt = get_current_gdt_rw();
835
	sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
A
Avi Kivity 已提交
836

837
	wrmsrl(MSR_EFER, efer | EFER_SVME);
A
Avi Kivity 已提交
838

839
	wrmsrl(MSR_VM_HSAVE_PA, page_to_pfn(sd->save_area) << PAGE_SHIFT);
840

841 842
	if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) {
		wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);
843
		__this_cpu_write(current_tsc_ratio, TSC_RATIO_DEFAULT);
844 845
	}

846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875

	/*
	 * 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;

876 877
	svm_init_erratum_383();

878 879
	amd_pmu_enable_virt();

880
	return 0;
A
Avi Kivity 已提交
881 882
}

883 884
static void svm_cpu_uninit(int cpu)
{
885
	struct svm_cpu_data *sd = per_cpu(svm_data, raw_smp_processor_id());
886

887
	if (!sd)
888 889 890
		return;

	per_cpu(svm_data, raw_smp_processor_id()) = NULL;
891
	kfree(sd->sev_vmcbs);
892 893
	__free_page(sd->save_area);
	kfree(sd);
894 895
}

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896 897
static int svm_cpu_init(int cpu)
{
898
	struct svm_cpu_data *sd;
A
Avi Kivity 已提交
899 900
	int r;

901 902
	sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
	if (!sd)
A
Avi Kivity 已提交
903
		return -ENOMEM;
904
	sd->cpu = cpu;
A
Avi Kivity 已提交
905
	r = -ENOMEM;
906
	sd->save_area = alloc_page(GFP_KERNEL);
907
	if (!sd->save_area)
A
Avi Kivity 已提交
908 909
		goto err_1;

910 911 912 913 914 915 916
	if (svm_sev_enabled()) {
		r = -ENOMEM;
		sd->sev_vmcbs = kmalloc((max_sev_asid + 1) * sizeof(void *), GFP_KERNEL);
		if (!sd->sev_vmcbs)
			goto err_1;
	}

917
	per_cpu(svm_data, cpu) = sd;
A
Avi Kivity 已提交
918 919 920 921

	return 0;

err_1:
922
	kfree(sd);
A
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923 924 925 926
	return r;

}

927 928 929 930 931 932 933 934 935 936 937
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;
}

938 939
static void set_msr_interception(u32 *msrpm, unsigned msr,
				 int read, int write)
A
Avi Kivity 已提交
940
{
941 942 943
	u8 bit_read, bit_write;
	unsigned long tmp;
	u32 offset;
A
Avi Kivity 已提交
944

945 946 947 948 949 950
	/*
	 * If this warning triggers extend the direct_access_msrs list at the
	 * beginning of the file
	 */
	WARN_ON(!valid_msr_intercept(msr));

951 952 953 954 955 956 957 958 959 960 961
	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
962 963
}

964
static void svm_vcpu_init_msrpm(u32 *msrpm)
A
Avi Kivity 已提交
965 966 967
{
	int i;

968 969
	memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));

970 971 972 973 974 975
	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);
	}
976 977
}

978 979 980 981 982 983 984 985
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)
986
			return;
987 988 989 990 991 992 993 994 995

		/* 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
996
	}
997 998 999 1000 1001

	/*
	 * If this BUG triggers the msrpm_offsets table has an overflow. Just
	 * increase MSRPM_OFFSETS in this case.
	 */
1002
	BUG();
A
Avi Kivity 已提交
1003 1004
}

1005
static void init_msrpm_offsets(void)
1006
{
1007
	int i;
1008

1009 1010 1011 1012 1013 1014 1015 1016 1017 1018
	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);
	}
1019 1020
}

1021 1022 1023 1024
static void svm_enable_lbrv(struct vcpu_svm *svm)
{
	u32 *msrpm = svm->msrpm;

1025
	svm->vmcb->control.virt_ext |= LBR_CTL_ENABLE_MASK;
1026 1027 1028 1029 1030 1031 1032 1033 1034 1035
	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;

1036
	svm->vmcb->control.virt_ext &= ~LBR_CTL_ENABLE_MASK;
1037 1038 1039 1040 1041 1042
	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);
}

1043 1044 1045
static void disable_nmi_singlestep(struct vcpu_svm *svm)
{
	svm->nmi_singlestep = false;
1046

1047 1048 1049 1050 1051 1052 1053
	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;
	}
1054 1055
}

1056 1057 1058 1059 1060 1061
/* Note:
 * This hash table is used to map VM_ID to a struct kvm_arch,
 * when handling AMD IOMMU GALOG notification to schedule in
 * a particular vCPU.
 */
#define SVM_VM_DATA_HASH_BITS	8
1062
static DEFINE_HASHTABLE(svm_vm_data_hash, SVM_VM_DATA_HASH_BITS);
1063 1064
static u32 next_vm_id = 0;
static bool next_vm_id_wrapped = 0;
1065
static DEFINE_SPINLOCK(svm_vm_data_hash_lock);
1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097

/* 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;
	struct kvm_arch *ka = NULL;
	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);
	hash_for_each_possible(svm_vm_data_hash, ka, hnode, vm_id) {
		struct kvm *kvm = container_of(ka, struct kvm, arch);
		struct kvm_arch *vm_data = &kvm->arch;

		if (vm_data->avic_vm_id != vm_id)
			continue;
		vcpu = kvm_get_vcpu_by_id(kvm, vcpu_id);
		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.
	 */
1098
	if (vcpu)
1099 1100 1101 1102 1103
		kvm_vcpu_wake_up(vcpu);

	return 0;
}

B
Brijesh Singh 已提交
1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114
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
1115 1116 1117 1118 1119 1120 1121 1122 1123
	/* Minimum ASID value that should be used for SEV guest */
	min_sev_asid = cpuid_edx(0x8000001F);

	/* Initialize SEV ASID bitmap */
	sev_asid_bitmap = kcalloc(BITS_TO_LONGS(max_sev_asid),
				sizeof(unsigned long), GFP_KERNEL);
	if (!sev_asid_bitmap)
		return 1;

B
Brijesh Singh 已提交
1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145
	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;
}

A
Avi Kivity 已提交
1146 1147 1148 1149
static __init int svm_hardware_setup(void)
{
	int cpu;
	struct page *iopm_pages;
1150
	void *iopm_va;
A
Avi Kivity 已提交
1151 1152 1153 1154 1155 1156
	int r;

	iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);

	if (!iopm_pages)
		return -ENOMEM;
1157 1158 1159

	iopm_va = page_address(iopm_pages);
	memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
A
Avi Kivity 已提交
1160 1161
	iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;

1162 1163
	init_msrpm_offsets();

1164 1165 1166
	if (boot_cpu_has(X86_FEATURE_NX))
		kvm_enable_efer_bits(EFER_NX);

A
Alexander Graf 已提交
1167 1168 1169
	if (boot_cpu_has(X86_FEATURE_FXSR_OPT))
		kvm_enable_efer_bits(EFER_FFXSR);

1170 1171
	if (boot_cpu_has(X86_FEATURE_TSCRATEMSR)) {
		kvm_has_tsc_control = true;
1172 1173
		kvm_max_tsc_scaling_ratio = TSC_RATIO_MAX;
		kvm_tsc_scaling_ratio_frac_bits = 32;
1174 1175
	}

1176 1177
	if (nested) {
		printk(KERN_INFO "kvm: Nested Virtualization enabled\n");
1178
		kvm_enable_efer_bits(EFER_SVME | EFER_LMSLE);
1179 1180
	}

B
Brijesh Singh 已提交
1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191
	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
1192
	for_each_possible_cpu(cpu) {
A
Avi Kivity 已提交
1193 1194
		r = svm_cpu_init(cpu);
		if (r)
1195
			goto err;
A
Avi Kivity 已提交
1196
	}
1197

1198
	if (!boot_cpu_has(X86_FEATURE_NPT))
1199 1200
		npt_enabled = false;

1201 1202 1203 1204 1205
	if (npt_enabled && !npt) {
		printk(KERN_INFO "kvm: Nested Paging disabled\n");
		npt_enabled = false;
	}

1206
	if (npt_enabled) {
1207
		printk(KERN_INFO "kvm: Nested Paging enabled\n");
1208
		kvm_enable_tdp();
1209 1210
	} else
		kvm_disable_tdp();
1211

1212 1213 1214
	if (avic) {
		if (!npt_enabled ||
		    !boot_cpu_has(X86_FEATURE_AVIC) ||
1215
		    !IS_ENABLED(CONFIG_X86_LOCAL_APIC)) {
1216
			avic = false;
1217
		} else {
1218
			pr_info("AVIC enabled\n");
1219 1220 1221

			amd_iommu_register_ga_log_notifier(&avic_ga_log_notifier);
		}
1222
	}
1223

1224 1225
	if (vls) {
		if (!npt_enabled ||
1226
		    !boot_cpu_has(X86_FEATURE_V_VMSAVE_VMLOAD) ||
1227 1228 1229 1230 1231 1232 1233
		    !IS_ENABLED(CONFIG_X86_64)) {
			vls = false;
		} else {
			pr_info("Virtual VMLOAD VMSAVE supported\n");
		}
	}

1234 1235 1236 1237 1238 1239 1240
	if (vgif) {
		if (!boot_cpu_has(X86_FEATURE_VGIF))
			vgif = false;
		else
			pr_info("Virtual GIF supported\n");
	}

A
Avi Kivity 已提交
1241 1242
	return 0;

1243
err:
A
Avi Kivity 已提交
1244 1245 1246 1247 1248 1249 1250
	__free_pages(iopm_pages, IOPM_ALLOC_ORDER);
	iopm_base = 0;
	return r;
}

static __exit void svm_hardware_unsetup(void)
{
1251 1252
	int cpu;

B
Brijesh Singh 已提交
1253 1254 1255
	if (svm_sev_enabled())
		kfree(sev_asid_bitmap);

Z
Zachary Amsden 已提交
1256
	for_each_possible_cpu(cpu)
1257 1258
		svm_cpu_uninit(cpu);

A
Avi Kivity 已提交
1259
	__free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
1260
	iopm_base = 0;
A
Avi Kivity 已提交
1261 1262 1263 1264 1265 1266
}

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
1267
		      SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
A
Avi Kivity 已提交
1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279
	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;
}

1280 1281 1282 1283 1284
static void svm_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u64 g_tsc_offset = 0;

1285
	if (is_guest_mode(vcpu)) {
1286 1287 1288
		g_tsc_offset = svm->vmcb->control.tsc_offset -
			       svm->nested.hsave->control.tsc_offset;
		svm->nested.hsave->control.tsc_offset = offset;
1289 1290 1291 1292
	} else
		trace_kvm_write_tsc_offset(vcpu->vcpu_id,
					   svm->vmcb->control.tsc_offset,
					   offset);
1293 1294

	svm->vmcb->control.tsc_offset = offset + g_tsc_offset;
1295 1296

	mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
1297 1298
}

1299 1300 1301 1302
static void avic_init_vmcb(struct vcpu_svm *svm)
{
	struct vmcb *vmcb = svm->vmcb;
	struct kvm_arch *vm_data = &svm->vcpu.kvm->arch;
1303 1304 1305
	phys_addr_t bpa = __sme_set(page_to_phys(svm->avic_backing_page));
	phys_addr_t lpa = __sme_set(page_to_phys(vm_data->avic_logical_id_table_page));
	phys_addr_t ppa = __sme_set(page_to_phys(vm_data->avic_physical_id_table_page));
1306 1307 1308 1309 1310 1311 1312 1313

	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
1314
static void init_vmcb(struct vcpu_svm *svm)
A
Avi Kivity 已提交
1315
{
1316 1317
	struct vmcb_control_area *control = &svm->vmcb->control;
	struct vmcb_save_area *save = &svm->vmcb->save;
A
Avi Kivity 已提交
1318

1319
	svm->vcpu.arch.hflags = 0;
1320

1321 1322 1323 1324 1325 1326
	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);
1327 1328
	if (!kvm_vcpu_apicv_active(&svm->vcpu))
		set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
A
Avi Kivity 已提交
1329

1330
	set_dr_intercepts(svm);
A
Avi Kivity 已提交
1331

1332 1333 1334
	set_exception_intercept(svm, PF_VECTOR);
	set_exception_intercept(svm, UD_VECTOR);
	set_exception_intercept(svm, MC_VECTOR);
1335
	set_exception_intercept(svm, AC_VECTOR);
1336
	set_exception_intercept(svm, DB_VECTOR);
A
Avi Kivity 已提交
1337

1338 1339 1340 1341
	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
1342
	set_intercept(svm, INTERCEPT_RDPMC);
1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359
	set_intercept(svm, INTERCEPT_CPUID);
	set_intercept(svm, INTERCEPT_INVD);
	set_intercept(svm, INTERCEPT_HLT);
	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
1360
	set_intercept(svm, INTERCEPT_XSETBV);
A
Avi Kivity 已提交
1361

1362 1363 1364 1365 1366
	if (!kvm_mwait_in_guest()) {
		set_intercept(svm, INTERCEPT_MONITOR);
		set_intercept(svm, INTERCEPT_MWAIT);
	}

1367 1368
	control->iopm_base_pa = __sme_set(iopm_base);
	control->msrpm_base_pa = __sme_set(__pa(svm->msrpm));
A
Avi Kivity 已提交
1369 1370 1371 1372 1373 1374 1375 1376 1377
	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;
1378
	save->cs.base = 0xffff0000;
A
Avi Kivity 已提交
1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389
	/* 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
1390
	svm_set_efer(&svm->vcpu, 0);
M
Mike Day 已提交
1391
	save->dr6 = 0xffff0ff0;
1392
	kvm_set_rflags(&svm->vcpu, 2);
A
Avi Kivity 已提交
1393
	save->rip = 0x0000fff0;
1394
	svm->vcpu.arch.regs[VCPU_REGS_RIP] = save->rip;
A
Avi Kivity 已提交
1395

J
Joerg Roedel 已提交
1396
	/*
1397
	 * svm_set_cr0() sets PG and WP and clears NW and CD on save->cr0.
1398
	 * It also updates the guest-visible cr0 value.
A
Avi Kivity 已提交
1399
	 */
1400
	svm_set_cr0(&svm->vcpu, X86_CR0_NW | X86_CR0_CD | X86_CR0_ET);
1401
	kvm_mmu_reset_context(&svm->vcpu);
1402

1403
	save->cr4 = X86_CR4_PAE;
A
Avi Kivity 已提交
1404
	/* rdx = ?? */
1405 1406 1407

	if (npt_enabled) {
		/* Setup VMCB for Nested Paging */
1408
		control->nested_ctl |= SVM_NESTED_CTL_NP_ENABLE;
1409
		clr_intercept(svm, INTERCEPT_INVLPG);
1410
		clr_exception_intercept(svm, PF_VECTOR);
1411 1412
		clr_cr_intercept(svm, INTERCEPT_CR3_READ);
		clr_cr_intercept(svm, INTERCEPT_CR3_WRITE);
1413
		save->g_pat = svm->vcpu.arch.pat;
1414 1415 1416
		save->cr3 = 0;
		save->cr4 = 0;
	}
1417
	svm->asid_generation = 0;
1418

1419
	svm->nested.vmcb = 0;
1420 1421
	svm->vcpu.arch.hflags = 0;

1422
	if (boot_cpu_has(X86_FEATURE_PAUSEFILTER)) {
1423
		control->pause_filter_count = 3000;
1424
		set_intercept(svm, INTERCEPT_PAUSE);
1425 1426
	}

1427
	if (kvm_vcpu_apicv_active(&svm->vcpu))
1428 1429
		avic_init_vmcb(svm);

1430 1431 1432 1433 1434 1435 1436 1437 1438 1439
	/*
	 * 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;
	}

1440 1441 1442 1443 1444 1445
	if (vgif) {
		clr_intercept(svm, INTERCEPT_STGI);
		clr_intercept(svm, INTERCEPT_CLGI);
		svm->vmcb->control.int_ctl |= V_GIF_ENABLE_MASK;
	}

B
Brijesh Singh 已提交
1446 1447 1448
	if (sev_guest(svm->vcpu.kvm))
		svm->vmcb->control.nested_ctl |= SVM_NESTED_CTL_SEV_ENABLE;

1449 1450
	mark_all_dirty(svm->vmcb);

1451
	enable_gif(svm);
1452 1453 1454

}

1455 1456
static u64 *avic_get_physical_id_entry(struct kvm_vcpu *vcpu,
				       unsigned int index)
1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520
{
	u64 *avic_physical_id_table;
	struct kvm_arch *vm_data = &vcpu->kvm->arch;

	if (index >= AVIC_MAX_PHYSICAL_ID_COUNT)
		return NULL;

	avic_physical_id_table = page_address(vm_data->avic_physical_id_table_page);

	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;
	int ret;

	if (kvm->arch.apic_access_page_done)
		return 0;

	ret = x86_set_memory_region(kvm,
				    APIC_ACCESS_PAGE_PRIVATE_MEMSLOT,
				    APIC_DEFAULT_PHYS_BASE,
				    PAGE_SIZE);
	if (ret)
		return ret;

	kvm->arch.apic_access_page_done = true;
	return 0;
}

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);
1521 1522 1523
	new_entry = __sme_set((page_to_phys(svm->avic_backing_page) &
			      AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK) |
			      AVIC_PHYSICAL_ID_ENTRY_VALID_MASK);
1524 1525 1526 1527 1528 1529 1530
	WRITE_ONCE(*entry, new_entry);

	svm->avic_physical_id_cache = entry;

	return 0;
}

B
Brijesh Singh 已提交
1531 1532
static void __sev_asid_free(int asid)
{
1533 1534
	struct svm_cpu_data *sd;
	int cpu, pos;
B
Brijesh Singh 已提交
1535 1536 1537

	pos = asid - 1;
	clear_bit(pos, sev_asid_bitmap);
1538 1539 1540 1541 1542

	for_each_possible_cpu(cpu) {
		sd = per_cpu(svm_data, cpu);
		sd->sev_vmcbs[pos] = NULL;
	}
B
Brijesh Singh 已提交
1543 1544 1545 1546 1547 1548 1549 1550 1551
}

static void sev_asid_free(struct kvm *kvm)
{
	struct kvm_sev_info *sev = &kvm->arch.sev_info;

	__sev_asid_free(sev->asid);
}

1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582
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);
}

1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659
static struct page **sev_pin_memory(struct kvm *kvm, unsigned long uaddr,
				    unsigned long ulen, unsigned long *n,
				    int write)
{
	struct kvm_sev_info *sev = &kvm->arch.sev_info;
	unsigned long npages, npinned, size;
	unsigned long locked, lock_limit;
	struct page **pages;
	int first, last;

	/* 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)
		pages = vmalloc(size);
	else
		pages = kmalloc(size, GFP_KERNEL);

	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)
{
	struct kvm_sev_info *sev = &kvm->arch.sev_info;

	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);
	}
}

1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675
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);
}

B
Brijesh Singh 已提交
1676 1677
static void sev_vm_destroy(struct kvm *kvm)
{
1678
	struct kvm_sev_info *sev = &kvm->arch.sev_info;
1679 1680
	struct list_head *head = &sev->regions_list;
	struct list_head *pos, *q;
1681

B
Brijesh Singh 已提交
1682 1683 1684
	if (!sev_guest(kvm))
		return;

1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699
	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);

1700
	sev_unbind_asid(kvm, sev->handle);
B
Brijesh Singh 已提交
1701 1702 1703
	sev_asid_free(kvm);
}

1704 1705
static void avic_vm_destroy(struct kvm *kvm)
{
1706
	unsigned long flags;
1707 1708
	struct kvm_arch *vm_data = &kvm->arch;

1709 1710 1711
	if (!avic)
		return;

1712 1713 1714 1715
	if (vm_data->avic_logical_id_table_page)
		__free_page(vm_data->avic_logical_id_table_page);
	if (vm_data->avic_physical_id_table_page)
		__free_page(vm_data->avic_physical_id_table_page);
1716 1717 1718 1719

	spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
	hash_del(&vm_data->hnode);
	spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);
1720 1721
}

B
Brijesh Singh 已提交
1722 1723 1724 1725 1726 1727
static void svm_vm_destroy(struct kvm *kvm)
{
	avic_vm_destroy(kvm);
	sev_vm_destroy(kvm);
}

1728 1729
static int avic_vm_init(struct kvm *kvm)
{
1730
	unsigned long flags;
1731
	int err = -ENOMEM;
1732 1733 1734
	struct kvm_arch *vm_data = &kvm->arch;
	struct page *p_page;
	struct page *l_page;
1735 1736
	struct kvm_arch *ka;
	u32 vm_id;
1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756

	if (!avic)
		return 0;

	/* Allocating physical APIC ID table (4KB) */
	p_page = alloc_page(GFP_KERNEL);
	if (!p_page)
		goto free_avic;

	vm_data->avic_physical_id_table_page = p_page;
	clear_page(page_address(p_page));

	/* Allocating logical APIC ID table (4KB) */
	l_page = alloc_page(GFP_KERNEL);
	if (!l_page)
		goto free_avic;

	vm_data->avic_logical_id_table_page = l_page;
	clear_page(page_address(l_page));

1757
	spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773
 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) {
		hash_for_each_possible(svm_vm_data_hash, ka, hnode, vm_id) {
			struct kvm *k2 = container_of(ka, struct kvm, arch);
			struct kvm_arch *vd2 = &k2->arch;
			if (vd2->avic_vm_id == vm_id)
				goto again;
		}
	}
	vm_data->avic_vm_id = vm_id;
1774 1775 1776
	hash_add(svm_vm_data_hash, &vm_data->hnode, vm_data->avic_vm_id);
	spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);

1777 1778 1779 1780 1781
	return 0;

free_avic:
	avic_vm_destroy(kvm);
	return err;
A
Avi Kivity 已提交
1782 1783
}

1784 1785
static inline int
avic_update_iommu_vcpu_affinity(struct kvm_vcpu *vcpu, int cpu, bool r)
1786
{
1787 1788 1789
	int ret = 0;
	unsigned long flags;
	struct amd_svm_iommu_ir *ir;
1790 1791
	struct vcpu_svm *svm = to_svm(vcpu);

1792 1793
	if (!kvm_arch_has_assigned_device(vcpu->kvm))
		return 0;
1794

1795 1796 1797 1798 1799
	/*
	 * 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);
1800

1801 1802
	if (list_empty(&svm->ir_list))
		goto out;
1803

1804 1805 1806 1807 1808 1809 1810 1811
	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;
1812 1813 1814 1815 1816 1817
}

static void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
	u64 entry;
	/* ID = 0xff (broadcast), ID > 0xff (reserved) */
1818
	int h_physical_id = kvm_cpu_get_apicid(cpu);
1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837
	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);
1838 1839
	avic_update_iommu_vcpu_affinity(vcpu, h_physical_id,
					svm->avic_is_running);
1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850
}

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));
1851 1852 1853
	if (entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK)
		avic_update_iommu_vcpu_affinity(vcpu, -1, 0);

1854 1855
	entry &= ~AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK;
	WRITE_ONCE(*(svm->avic_physical_id_cache), entry);
A
Avi Kivity 已提交
1856 1857
}

1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871
/**
 * 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);
}

1872
static void svm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event)
1873 1874
{
	struct vcpu_svm *svm = to_svm(vcpu);
1875 1876
	u32 dummy;
	u32 eax = 1;
1877

1878 1879 1880 1881 1882 1883
	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
1884
	init_vmcb(svm);
A
Avi Kivity 已提交
1885

1886
	kvm_cpuid(vcpu, &eax, &dummy, &dummy, &dummy, true);
1887
	kvm_register_write(vcpu, VCPU_REGS_RDX, eax);
1888 1889 1890

	if (kvm_vcpu_apicv_active(vcpu) && !init_event)
		avic_update_vapic_bar(svm, APIC_DEFAULT_PHYS_BASE);
1891 1892
}

1893 1894 1895 1896
static int avic_init_vcpu(struct vcpu_svm *svm)
{
	int ret;

1897
	if (!kvm_vcpu_apicv_active(&svm->vcpu))
1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909
		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);

	return ret;
}

R
Rusty Russell 已提交
1910
static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
A
Avi Kivity 已提交
1911
{
1912
	struct vcpu_svm *svm;
A
Avi Kivity 已提交
1913
	struct page *page;
1914
	struct page *msrpm_pages;
A
Alexander Graf 已提交
1915
	struct page *hsave_page;
A
Alexander Graf 已提交
1916
	struct page *nested_msrpm_pages;
R
Rusty Russell 已提交
1917
	int err;
A
Avi Kivity 已提交
1918

1919
	svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
R
Rusty Russell 已提交
1920 1921 1922 1923 1924 1925 1926 1927 1928
	if (!svm) {
		err = -ENOMEM;
		goto out;
	}

	err = kvm_vcpu_init(&svm->vcpu, kvm, id);
	if (err)
		goto free_svm;

1929
	err = -ENOMEM;
A
Avi Kivity 已提交
1930
	page = alloc_page(GFP_KERNEL);
1931
	if (!page)
R
Rusty Russell 已提交
1932
		goto uninit;
A
Avi Kivity 已提交
1933

1934 1935
	msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
	if (!msrpm_pages)
1936
		goto free_page1;
A
Alexander Graf 已提交
1937 1938 1939

	nested_msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
	if (!nested_msrpm_pages)
1940
		goto free_page2;
1941

A
Alexander Graf 已提交
1942 1943
	hsave_page = alloc_page(GFP_KERNEL);
	if (!hsave_page)
1944 1945
		goto free_page3;

1946 1947 1948
	err = avic_init_vcpu(svm);
	if (err)
		goto free_page4;
1949

1950 1951 1952 1953 1954
	/* 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;

1955
	svm->nested.hsave = page_address(hsave_page);
A
Alexander Graf 已提交
1956

1957 1958 1959
	svm->msrpm = page_address(msrpm_pages);
	svm_vcpu_init_msrpm(svm->msrpm);

1960
	svm->nested.msrpm = page_address(nested_msrpm_pages);
1961
	svm_vcpu_init_msrpm(svm->nested.msrpm);
A
Alexander Graf 已提交
1962

1963 1964
	svm->vmcb = page_address(page);
	clear_page(svm->vmcb);
1965
	svm->vmcb_pa = __sme_set(page_to_pfn(page) << PAGE_SHIFT);
1966
	svm->asid_generation = 0;
P
Paolo Bonzini 已提交
1967
	init_vmcb(svm);
A
Avi Kivity 已提交
1968

1969 1970
	svm_init_osvw(&svm->vcpu);

R
Rusty Russell 已提交
1971
	return &svm->vcpu;
1972

1973 1974
free_page4:
	__free_page(hsave_page);
1975 1976 1977 1978 1979 1980
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
1981 1982 1983
uninit:
	kvm_vcpu_uninit(&svm->vcpu);
free_svm:
1984
	kmem_cache_free(kvm_vcpu_cache, svm);
R
Rusty Russell 已提交
1985 1986
out:
	return ERR_PTR(err);
A
Avi Kivity 已提交
1987 1988 1989 1990
}

static void svm_free_vcpu(struct kvm_vcpu *vcpu)
{
1991 1992
	struct vcpu_svm *svm = to_svm(vcpu);

1993
	__free_page(pfn_to_page(__sme_clr(svm->vmcb_pa) >> PAGE_SHIFT));
1994
	__free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER);
1995 1996
	__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
1997
	kvm_vcpu_uninit(vcpu);
1998
	kmem_cache_free(kvm_vcpu_cache, svm);
A
Avi Kivity 已提交
1999 2000
}

2001
static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
A
Avi Kivity 已提交
2002
{
2003
	struct vcpu_svm *svm = to_svm(vcpu);
2004
	int i;
2005 2006

	if (unlikely(cpu != vcpu->cpu)) {
2007
		svm->asid_generation = 0;
2008
		mark_all_dirty(svm->vmcb);
2009
	}
2010

2011 2012 2013
#ifdef CONFIG_X86_64
	rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host.gs_base);
#endif
2014 2015 2016 2017
	savesegment(fs, svm->host.fs);
	savesegment(gs, svm->host.gs);
	svm->host.ldt = kvm_read_ldt();

2018
	for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
2019
		rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
2020

2021 2022 2023 2024 2025 2026
	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);
		}
2027
	}
P
Paolo Bonzini 已提交
2028 2029 2030
	/* This assumes that the kernel never uses MSR_TSC_AUX */
	if (static_cpu_has(X86_FEATURE_RDTSCP))
		wrmsrl(MSR_TSC_AUX, svm->tsc_aux);
2031 2032

	avic_vcpu_load(vcpu, cpu);
A
Avi Kivity 已提交
2033 2034 2035 2036
}

static void svm_vcpu_put(struct kvm_vcpu *vcpu)
{
2037
	struct vcpu_svm *svm = to_svm(vcpu);
2038 2039
	int i;

2040 2041
	avic_vcpu_put(vcpu);

2042
	++vcpu->stat.host_state_reload;
2043 2044 2045
	kvm_load_ldt(svm->host.ldt);
#ifdef CONFIG_X86_64
	loadsegment(fs, svm->host.fs);
2046
	wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gsbase);
2047
	load_gs_index(svm->host.gs);
2048
#else
2049
#ifdef CONFIG_X86_32_LAZY_GS
2050
	loadsegment(gs, svm->host.gs);
2051
#endif
2052
#endif
2053
	for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
2054
		wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
A
Avi Kivity 已提交
2055 2056
}

2057 2058 2059 2060 2061 2062 2063 2064 2065 2066
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
2067 2068
static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
{
2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079
	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
2080 2081 2082 2083
}

static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
{
2084 2085 2086
	if (to_svm(vcpu)->nmi_singlestep)
		rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);

P
Paolo Bonzini 已提交
2087
       /*
A
Andrea Gelmini 已提交
2088
        * Any change of EFLAGS.VM is accompanied by a reload of SS
P
Paolo Bonzini 已提交
2089 2090 2091
        * (caused by either a task switch or an inter-privilege IRET),
        * so we do not need to update the CPL here.
        */
2092
	to_svm(vcpu)->vmcb->save.rflags = rflags;
A
Avi Kivity 已提交
2093 2094
}

A
Avi Kivity 已提交
2095 2096 2097 2098 2099
static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
{
	switch (reg) {
	case VCPU_EXREG_PDPTR:
		BUG_ON(!npt_enabled);
2100
		load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu));
A
Avi Kivity 已提交
2101 2102 2103 2104 2105 2106
		break;
	default:
		BUG();
	}
}

2107 2108
static void svm_set_vintr(struct vcpu_svm *svm)
{
2109
	set_intercept(svm, INTERCEPT_VINTR);
2110 2111 2112 2113
}

static void svm_clear_vintr(struct vcpu_svm *svm)
{
2114
	clr_intercept(svm, INTERCEPT_VINTR);
2115 2116
}

A
Avi Kivity 已提交
2117 2118
static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
{
2119
	struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
A
Avi Kivity 已提交
2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131

	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
2132
	return NULL;
A
Avi Kivity 已提交
2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156
}

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;
2157 2158 2159 2160 2161 2162 2163 2164 2165 2166

	/*
	 * 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;
2167

J
Joerg Roedel 已提交
2168 2169
	/*
	 * AMD's VMCB does not have an explicit unusable field, so emulate it
2170 2171
	 * for cross vendor migration purposes by "not present"
	 */
2172
	var->unusable = !var->present;
2173

2174 2175 2176 2177 2178 2179
	switch (seg) {
	case VCPU_SREG_TR:
		/*
		 * Work around a bug where the busy flag in the tr selector
		 * isn't exposed
		 */
2180
		var->type |= 0x2;
2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195
		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;
2196
	case VCPU_SREG_SS:
J
Joerg Roedel 已提交
2197 2198
		/*
		 * On AMD CPUs sometimes the DB bit in the segment
2199 2200 2201 2202 2203 2204
		 * 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;
2205
		/* This is symmetric with svm_set_segment() */
J
Jan Kiszka 已提交
2206
		var->dpl = to_svm(vcpu)->vmcb->save.cpl;
2207
		break;
2208
	}
A
Avi Kivity 已提交
2209 2210
}

2211 2212 2213 2214 2215 2216 2217
static int svm_get_cpl(struct kvm_vcpu *vcpu)
{
	struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;

	return save->cpl;
}

2218
static void svm_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2219
{
2220 2221
	struct vcpu_svm *svm = to_svm(vcpu);

2222 2223
	dt->size = svm->vmcb->save.idtr.limit;
	dt->address = svm->vmcb->save.idtr.base;
A
Avi Kivity 已提交
2224 2225
}

2226
static void svm_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2227
{
2228 2229
	struct vcpu_svm *svm = to_svm(vcpu);

2230 2231
	svm->vmcb->save.idtr.limit = dt->size;
	svm->vmcb->save.idtr.base = dt->address ;
2232
	mark_dirty(svm->vmcb, VMCB_DT);
A
Avi Kivity 已提交
2233 2234
}

2235
static void svm_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2236
{
2237 2238
	struct vcpu_svm *svm = to_svm(vcpu);

2239 2240
	dt->size = svm->vmcb->save.gdtr.limit;
	dt->address = svm->vmcb->save.gdtr.base;
A
Avi Kivity 已提交
2241 2242
}

2243
static void svm_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2244
{
2245 2246
	struct vcpu_svm *svm = to_svm(vcpu);

2247 2248
	svm->vmcb->save.gdtr.limit = dt->size;
	svm->vmcb->save.gdtr.base = dt->address ;
2249
	mark_dirty(svm->vmcb, VMCB_DT);
A
Avi Kivity 已提交
2250 2251
}

2252 2253 2254 2255
static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
{
}

2256 2257 2258 2259
static void svm_decache_cr3(struct kvm_vcpu *vcpu)
{
}

2260
static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
2261 2262 2263
{
}

A
Avi Kivity 已提交
2264 2265 2266 2267 2268
static void update_cr0_intercept(struct vcpu_svm *svm)
{
	ulong gcr0 = svm->vcpu.arch.cr0;
	u64 *hcr0 = &svm->vmcb->save.cr0;

2269 2270
	*hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK)
		| (gcr0 & SVM_CR0_SELECTIVE_MASK);
A
Avi Kivity 已提交
2271

2272
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
2273

2274
	if (gcr0 == *hcr0) {
2275 2276
		clr_cr_intercept(svm, INTERCEPT_CR0_READ);
		clr_cr_intercept(svm, INTERCEPT_CR0_WRITE);
A
Avi Kivity 已提交
2277
	} else {
2278 2279
		set_cr_intercept(svm, INTERCEPT_CR0_READ);
		set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
A
Avi Kivity 已提交
2280 2281 2282
	}
}

A
Avi Kivity 已提交
2283 2284
static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
{
2285 2286
	struct vcpu_svm *svm = to_svm(vcpu);

2287
#ifdef CONFIG_X86_64
2288
	if (vcpu->arch.efer & EFER_LME) {
2289
		if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
2290
			vcpu->arch.efer |= EFER_LMA;
2291
			svm->vmcb->save.efer |= EFER_LMA | EFER_LME;
A
Avi Kivity 已提交
2292 2293
		}

M
Mike Day 已提交
2294
		if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) {
2295
			vcpu->arch.efer &= ~EFER_LMA;
2296
			svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME);
A
Avi Kivity 已提交
2297 2298 2299
		}
	}
#endif
2300
	vcpu->arch.cr0 = cr0;
2301 2302 2303

	if (!npt_enabled)
		cr0 |= X86_CR0_PG | X86_CR0_WP;
2304

2305 2306 2307 2308 2309 2310 2311
	/*
	 * 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);
2312
	svm->vmcb->save.cr0 = cr0;
2313
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
2314
	update_cr0_intercept(svm);
A
Avi Kivity 已提交
2315 2316
}

2317
static int svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
A
Avi Kivity 已提交
2318
{
2319
	unsigned long host_cr4_mce = cr4_read_shadow() & X86_CR4_MCE;
2320 2321
	unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4;

2322 2323 2324
	if (cr4 & X86_CR4_VMXE)
		return 1;

2325
	if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE))
2326
		svm_flush_tlb(vcpu);
2327

2328 2329 2330
	vcpu->arch.cr4 = cr4;
	if (!npt_enabled)
		cr4 |= X86_CR4_PAE;
2331
	cr4 |= host_cr4_mce;
2332
	to_svm(vcpu)->vmcb->save.cr4 = cr4;
2333
	mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
2334
	return 0;
A
Avi Kivity 已提交
2335 2336 2337 2338 2339
}

static void svm_set_segment(struct kvm_vcpu *vcpu,
			    struct kvm_segment *var, int seg)
{
2340
	struct vcpu_svm *svm = to_svm(vcpu);
A
Avi Kivity 已提交
2341 2342 2343 2344 2345
	struct vmcb_seg *s = svm_seg(vcpu, seg);

	s->base = var->base;
	s->limit = var->limit;
	s->selector = var->selector;
2346 2347 2348 2349 2350 2351 2352 2353
	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
2354 2355 2356 2357 2358 2359 2360 2361

	/*
	 * 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)
2362 2363
		/* This is symmetric with svm_get_segment() */
		svm->vmcb->save.cpl = (var->dpl & 3);
A
Avi Kivity 已提交
2364

2365
	mark_dirty(svm->vmcb, VMCB_SEG);
A
Avi Kivity 已提交
2366 2367
}

2368
static void update_bp_intercept(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
2369
{
J
Jan Kiszka 已提交
2370 2371
	struct vcpu_svm *svm = to_svm(vcpu);

2372
	clr_exception_intercept(svm, BP_VECTOR);
2373

J
Jan Kiszka 已提交
2374 2375
	if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) {
		if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
2376
			set_exception_intercept(svm, BP_VECTOR);
J
Jan Kiszka 已提交
2377 2378
	} else
		vcpu->guest_debug = 0;
2379 2380
}

2381
static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd)
A
Avi Kivity 已提交
2382
{
2383 2384
	if (sd->next_asid > sd->max_asid) {
		++sd->asid_generation;
2385
		sd->next_asid = sd->min_asid;
2386
		svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
A
Avi Kivity 已提交
2387 2388
	}

2389 2390
	svm->asid_generation = sd->asid_generation;
	svm->vmcb->control.asid = sd->next_asid++;
2391 2392

	mark_dirty(svm->vmcb, VMCB_ASID);
A
Avi Kivity 已提交
2393 2394
}

J
Jan Kiszka 已提交
2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407
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);
}

2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422
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);
}

2423
static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value)
A
Avi Kivity 已提交
2424
{
2425 2426
	struct vcpu_svm *svm = to_svm(vcpu);

2427
	svm->vmcb->save.dr7 = value;
2428
	mark_dirty(svm->vmcb, VMCB_DR);
A
Avi Kivity 已提交
2429 2430
}

A
Avi Kivity 已提交
2431
static int pf_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2432
{
2433
	u64 fault_address = __sme_clr(svm->vmcb->control.exit_info_2);
2434
	u64 error_code = svm->vmcb->control.exit_info_1;
A
Avi Kivity 已提交
2435

2436
	return kvm_handle_page_fault(&svm->vcpu, error_code, fault_address,
2437
			svm->vmcb->control.insn_bytes,
2438 2439 2440 2441 2442
			svm->vmcb->control.insn_len);
}

static int npf_interception(struct vcpu_svm *svm)
{
2443
	u64 fault_address = __sme_clr(svm->vmcb->control.exit_info_2);
2444 2445 2446 2447 2448 2449
	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,
			svm->vmcb->control.insn_bytes,
			svm->vmcb->control.insn_len);
A
Avi Kivity 已提交
2450 2451
}

A
Avi Kivity 已提交
2452
static int db_interception(struct vcpu_svm *svm)
J
Jan Kiszka 已提交
2453
{
A
Avi Kivity 已提交
2454 2455
	struct kvm_run *kvm_run = svm->vcpu.run;

J
Jan Kiszka 已提交
2456
	if (!(svm->vcpu.guest_debug &
2457
	      (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) &&
J
Jan Kiszka 已提交
2458
		!svm->nmi_singlestep) {
J
Jan Kiszka 已提交
2459 2460 2461
		kvm_queue_exception(&svm->vcpu, DB_VECTOR);
		return 1;
	}
2462

J
Jan Kiszka 已提交
2463
	if (svm->nmi_singlestep) {
2464
		disable_nmi_singlestep(svm);
2465 2466 2467
	}

	if (svm->vcpu.guest_debug &
J
Joerg Roedel 已提交
2468
	    (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) {
2469 2470 2471 2472 2473 2474 2475 2476
		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
2477 2478
}

A
Avi Kivity 已提交
2479
static int bp_interception(struct vcpu_svm *svm)
J
Jan Kiszka 已提交
2480
{
A
Avi Kivity 已提交
2481 2482
	struct kvm_run *kvm_run = svm->vcpu.run;

J
Jan Kiszka 已提交
2483 2484 2485 2486 2487 2488
	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
2489
static int ud_interception(struct vcpu_svm *svm)
2490 2491 2492
{
	int er;

2493
	er = emulate_instruction(&svm->vcpu, EMULTYPE_TRAP_UD);
2494
	if (er != EMULATE_DONE)
2495
		kvm_queue_exception(&svm->vcpu, UD_VECTOR);
2496 2497 2498
	return 1;
}

2499 2500 2501 2502 2503 2504
static int ac_interception(struct vcpu_svm *svm)
{
	kvm_queue_exception_e(&svm->vcpu, AC_VECTOR, 0);
	return 1;
}

2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543
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;
}

2544
static void svm_handle_mce(struct vcpu_svm *svm)
2545
{
2546 2547 2548 2549 2550 2551 2552
	if (is_erratum_383()) {
		/*
		 * Erratum 383 triggered. Guest state is corrupt so kill the
		 * guest.
		 */
		pr_err("KVM: Guest triggered AMD Erratum 383\n");

2553
		kvm_make_request(KVM_REQ_TRIPLE_FAULT, &svm->vcpu);
2554 2555 2556 2557

		return;
	}

2558 2559 2560 2561 2562 2563 2564 2565
	/*
	 * 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 */

2566 2567 2568 2569 2570
	return;
}

static int mc_interception(struct vcpu_svm *svm)
{
2571 2572 2573
	return 1;
}

A
Avi Kivity 已提交
2574
static int shutdown_interception(struct vcpu_svm *svm)
2575
{
A
Avi Kivity 已提交
2576 2577
	struct kvm_run *kvm_run = svm->vcpu.run;

2578 2579 2580 2581
	/*
	 * VMCB is undefined after a SHUTDOWN intercept
	 * so reinitialize it.
	 */
2582
	clear_page(svm->vmcb);
P
Paolo Bonzini 已提交
2583
	init_vmcb(svm);
2584 2585 2586 2587 2588

	kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
	return 0;
}

A
Avi Kivity 已提交
2589
static int io_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2590
{
2591
	struct kvm_vcpu *vcpu = &svm->vcpu;
M
Mike Day 已提交
2592
	u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */
2593
	int size, in, string, ret;
2594
	unsigned port;
A
Avi Kivity 已提交
2595

R
Rusty Russell 已提交
2596
	++svm->vcpu.stat.io_exits;
2597
	string = (io_info & SVM_IOIO_STR_MASK) != 0;
2598
	in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
2599
	if (string)
2600
		return emulate_instruction(vcpu, 0) == EMULATE_DONE;
2601

2602 2603
	port = io_info >> 16;
	size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
2604
	svm->next_rip = svm->vmcb->control.exit_info_2;
2605
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
2606

2607 2608 2609 2610 2611 2612 2613 2614
	/*
	 * TODO: we might be squashing a KVM_GUESTDBG_SINGLESTEP-triggered
	 * KVM_EXIT_DEBUG here.
	 */
	if (in)
		return kvm_fast_pio_in(vcpu, size, port) && ret;
	else
		return kvm_fast_pio_out(vcpu, size, port) && ret;
A
Avi Kivity 已提交
2615 2616
}

A
Avi Kivity 已提交
2617
static int nmi_interception(struct vcpu_svm *svm)
2618 2619 2620 2621
{
	return 1;
}

A
Avi Kivity 已提交
2622
static int intr_interception(struct vcpu_svm *svm)
2623 2624 2625 2626 2627
{
	++svm->vcpu.stat.irq_exits;
	return 1;
}

A
Avi Kivity 已提交
2628
static int nop_on_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2629 2630 2631 2632
{
	return 1;
}

A
Avi Kivity 已提交
2633
static int halt_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2634
{
2635
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 1;
R
Rusty Russell 已提交
2636
	return kvm_emulate_halt(&svm->vcpu);
A
Avi Kivity 已提交
2637 2638
}

A
Avi Kivity 已提交
2639
static int vmmcall_interception(struct vcpu_svm *svm)
2640
{
2641
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2642
	return kvm_emulate_hypercall(&svm->vcpu);
2643 2644
}

2645 2646 2647 2648 2649 2650 2651
static unsigned long nested_svm_get_tdp_cr3(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	return svm->nested.nested_cr3;
}

2652 2653 2654 2655 2656 2657 2658
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;

2659
	ret = kvm_vcpu_read_guest_page(vcpu, gpa_to_gfn(__sme_clr(cr3)), &pdpte,
2660
				       offset_in_page(cr3) + index * 8, 8);
2661 2662 2663 2664 2665
	if (ret)
		return 0;
	return pdpte;
}

2666 2667 2668 2669 2670
static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu,
				   unsigned long root)
{
	struct vcpu_svm *svm = to_svm(vcpu);

2671
	svm->vmcb->control.nested_cr3 = __sme_set(root);
2672
	mark_dirty(svm->vmcb, VMCB_NPT);
2673
	svm_flush_tlb(vcpu);
2674 2675
}

2676 2677
static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu,
				       struct x86_exception *fault)
2678 2679 2680
{
	struct vcpu_svm *svm = to_svm(vcpu);

2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700
	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;
2701 2702 2703 2704

	nested_svm_vmexit(svm);
}

2705
static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu)
2706
{
2707 2708
	WARN_ON(mmu_is_nested(vcpu));
	kvm_init_shadow_mmu(vcpu);
2709 2710
	vcpu->arch.mmu.set_cr3           = nested_svm_set_tdp_cr3;
	vcpu->arch.mmu.get_cr3           = nested_svm_get_tdp_cr3;
2711
	vcpu->arch.mmu.get_pdptr         = nested_svm_get_tdp_pdptr;
2712
	vcpu->arch.mmu.inject_page_fault = nested_svm_inject_npf_exit;
2713
	vcpu->arch.mmu.shadow_root_level = get_npt_level(vcpu);
2714
	reset_shadow_zero_bits_mask(vcpu, &vcpu->arch.mmu);
2715 2716 2717 2718 2719 2720 2721 2722
	vcpu->arch.walk_mmu              = &vcpu->arch.nested_mmu;
}

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

2723 2724
static int nested_svm_check_permissions(struct vcpu_svm *svm)
{
2725 2726
	if (!(svm->vcpu.arch.efer & EFER_SVME) ||
	    !is_paging(&svm->vcpu)) {
2727 2728 2729 2730 2731 2732 2733 2734 2735
		kvm_queue_exception(&svm->vcpu, UD_VECTOR);
		return 1;
	}

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

2736
	return 0;
2737 2738
}

2739 2740 2741
static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
				      bool has_error_code, u32 error_code)
{
2742 2743
	int vmexit;

2744
	if (!is_guest_mode(&svm->vcpu))
2745
		return 0;
2746

2747 2748 2749 2750
	vmexit = nested_svm_intercept(svm);
	if (vmexit != NESTED_EXIT_DONE)
		return 0;

2751 2752 2753
	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;
2754 2755 2756 2757 2758 2759 2760 2761 2762 2763

	/*
	 * FIXME: we should not write CR2 when L1 intercepts an L2 #PF exception.
	 * The fix is to add the ancillary datum (CR2 or DR6) to structs
	 * kvm_queued_exception and kvm_vcpu_events, so that CR2 and DR6 can be
	 * written only when inject_pending_event runs (DR6 would written here
	 * too).  This should be conditional on a new capability---if the
	 * capability is disabled, kvm_multiple_exception would write the
	 * ancillary information to CR2 or DR6, for backwards ABI-compatibility.
	 */
2764 2765 2766 2767
	if (svm->vcpu.arch.exception.nested_apf)
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.apf.nested_apf_token;
	else
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2;
2768

2769
	svm->nested.exit_required = true;
2770
	return vmexit;
2771 2772
}

2773 2774
/* This function returns true if it is save to enable the irq window */
static inline bool nested_svm_intr(struct vcpu_svm *svm)
2775
{
2776
	if (!is_guest_mode(&svm->vcpu))
2777
		return true;
2778

2779
	if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
2780
		return true;
2781

2782
	if (!(svm->vcpu.arch.hflags & HF_HIF_MASK))
2783
		return false;
2784

2785 2786 2787 2788 2789 2790 2791 2792
	/*
	 * 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;

2793 2794 2795
	svm->vmcb->control.exit_code   = SVM_EXIT_INTR;
	svm->vmcb->control.exit_info_1 = 0;
	svm->vmcb->control.exit_info_2 = 0;
2796

2797 2798 2799
	if (svm->nested.intercept & 1ULL) {
		/*
		 * The #vmexit can't be emulated here directly because this
G
Guo Chao 已提交
2800
		 * code path runs with irqs and preemption disabled. A
2801 2802 2803 2804
		 * #vmexit emulation might sleep. Only signal request for
		 * the #vmexit here.
		 */
		svm->nested.exit_required = true;
2805
		trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip);
2806
		return false;
2807 2808
	}

2809
	return true;
2810 2811
}

2812 2813 2814
/* This function returns true if it is save to enable the nmi window */
static inline bool nested_svm_nmi(struct vcpu_svm *svm)
{
2815
	if (!is_guest_mode(&svm->vcpu))
2816 2817 2818 2819 2820 2821 2822 2823 2824
		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;
2825 2826
}

2827
static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, struct page **_page)
2828 2829 2830
{
	struct page *page;

2831 2832
	might_sleep();

2833
	page = kvm_vcpu_gfn_to_page(&svm->vcpu, gpa >> PAGE_SHIFT);
2834 2835 2836
	if (is_error_page(page))
		goto error;

2837 2838 2839
	*_page = page;

	return kmap(page);
2840 2841 2842 2843 2844 2845 2846

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

	return NULL;
}

2847
static void nested_svm_unmap(struct page *page)
2848
{
2849
	kunmap(page);
2850 2851 2852
	kvm_release_page_dirty(page);
}

2853 2854
static int nested_svm_intercept_ioio(struct vcpu_svm *svm)
{
2855 2856 2857
	unsigned port, size, iopm_len;
	u16 val, mask;
	u8 start_bit;
2858
	u64 gpa;
2859

2860 2861
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_IOIO_PROT)))
		return NESTED_EXIT_HOST;
2862

2863
	port = svm->vmcb->control.exit_info_1 >> 16;
2864 2865
	size = (svm->vmcb->control.exit_info_1 & SVM_IOIO_SIZE_MASK) >>
		SVM_IOIO_SIZE_SHIFT;
2866
	gpa  = svm->nested.vmcb_iopm + (port / 8);
2867 2868 2869 2870
	start_bit = port % 8;
	iopm_len = (start_bit + size > 8) ? 2 : 1;
	mask = (0xf >> (4 - size)) << start_bit;
	val = 0;
2871

2872
	if (kvm_vcpu_read_guest(&svm->vcpu, gpa, &val, iopm_len))
2873
		return NESTED_EXIT_DONE;
2874

2875
	return (val & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
2876 2877
}

2878
static int nested_svm_exit_handled_msr(struct vcpu_svm *svm)
2879
{
2880 2881
	u32 offset, msr, value;
	int write, mask;
2882

2883
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
2884
		return NESTED_EXIT_HOST;
2885

2886 2887 2888 2889
	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);
2890

2891 2892
	if (offset == MSR_INVALID)
		return NESTED_EXIT_DONE;
2893

2894 2895
	/* Offset is in 32 bit units but need in 8 bit units */
	offset *= 4;
2896

2897
	if (kvm_vcpu_read_guest(&svm->vcpu, svm->nested.vmcb_msrpm + offset, &value, 4))
2898
		return NESTED_EXIT_DONE;
2899

2900
	return (value & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
2901 2902
}

2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927
/* 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;
}

2928
static int nested_svm_exit_special(struct vcpu_svm *svm)
2929 2930
{
	u32 exit_code = svm->vmcb->control.exit_code;
2931

2932 2933 2934
	switch (exit_code) {
	case SVM_EXIT_INTR:
	case SVM_EXIT_NMI:
2935
	case SVM_EXIT_EXCP_BASE + MC_VECTOR:
2936 2937
		return NESTED_EXIT_HOST;
	case SVM_EXIT_NPF:
J
Joerg Roedel 已提交
2938
		/* For now we are always handling NPFs when using them */
2939 2940 2941 2942
		if (npt_enabled)
			return NESTED_EXIT_HOST;
		break;
	case SVM_EXIT_EXCP_BASE + PF_VECTOR:
G
Gleb Natapov 已提交
2943
		/* When we're shadowing, trap PFs, but not async PF */
2944
		if (!npt_enabled && svm->vcpu.arch.apf.host_apf_reason == 0)
2945 2946 2947 2948
			return NESTED_EXIT_HOST;
		break;
	default:
		break;
2949 2950
	}

2951 2952 2953 2954 2955 2956
	return NESTED_EXIT_CONTINUE;
}

/*
 * If this function returns true, this #vmexit was already handled
 */
2957
static int nested_svm_intercept(struct vcpu_svm *svm)
2958 2959 2960 2961
{
	u32 exit_code = svm->vmcb->control.exit_code;
	int vmexit = NESTED_EXIT_HOST;

2962
	switch (exit_code) {
2963
	case SVM_EXIT_MSR:
2964
		vmexit = nested_svm_exit_handled_msr(svm);
2965
		break;
2966 2967 2968
	case SVM_EXIT_IOIO:
		vmexit = nested_svm_intercept_ioio(svm);
		break;
2969 2970 2971
	case SVM_EXIT_READ_CR0 ... SVM_EXIT_WRITE_CR8: {
		u32 bit = 1U << (exit_code - SVM_EXIT_READ_CR0);
		if (svm->nested.intercept_cr & bit)
2972
			vmexit = NESTED_EXIT_DONE;
2973 2974
		break;
	}
2975 2976 2977
	case SVM_EXIT_READ_DR0 ... SVM_EXIT_WRITE_DR7: {
		u32 bit = 1U << (exit_code - SVM_EXIT_READ_DR0);
		if (svm->nested.intercept_dr & bit)
2978
			vmexit = NESTED_EXIT_DONE;
2979 2980 2981 2982
		break;
	}
	case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: {
		u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE);
2983 2984 2985 2986 2987 2988
		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
2989 2990
		/* async page fault always cause vmexit */
		else if ((exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) &&
2991
			 svm->vcpu.arch.exception.nested_apf != 0)
G
Gleb Natapov 已提交
2992
			vmexit = NESTED_EXIT_DONE;
2993 2994
		break;
	}
2995 2996 2997 2998
	case SVM_EXIT_ERR: {
		vmexit = NESTED_EXIT_DONE;
		break;
	}
2999 3000
	default: {
		u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR);
J
Joerg Roedel 已提交
3001
		if (svm->nested.intercept & exit_bits)
3002
			vmexit = NESTED_EXIT_DONE;
3003 3004 3005
	}
	}

3006 3007 3008 3009 3010 3011 3012 3013 3014 3015
	return vmexit;
}

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

	vmexit = nested_svm_intercept(svm);

	if (vmexit == NESTED_EXIT_DONE)
3016 3017 3018
		nested_svm_vmexit(svm);

	return vmexit;
3019 3020
}

3021 3022 3023 3024 3025
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;

3026
	dst->intercept_cr         = from->intercept_cr;
3027
	dst->intercept_dr         = from->intercept_dr;
3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047
	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;
3048
	dst->virt_ext              = from->virt_ext;
3049 3050
}

3051
static int nested_svm_vmexit(struct vcpu_svm *svm)
3052
{
3053
	struct vmcb *nested_vmcb;
3054
	struct vmcb *hsave = svm->nested.hsave;
J
Joerg Roedel 已提交
3055
	struct vmcb *vmcb = svm->vmcb;
3056
	struct page *page;
3057

3058 3059 3060 3061
	trace_kvm_nested_vmexit_inject(vmcb->control.exit_code,
				       vmcb->control.exit_info_1,
				       vmcb->control.exit_info_2,
				       vmcb->control.exit_int_info,
3062 3063
				       vmcb->control.exit_int_info_err,
				       KVM_ISA_SVM);
3064

3065
	nested_vmcb = nested_svm_map(svm, svm->nested.vmcb, &page);
3066 3067 3068
	if (!nested_vmcb)
		return 1;

3069 3070
	/* Exit Guest-Mode */
	leave_guest_mode(&svm->vcpu);
3071 3072
	svm->nested.vmcb = 0;

3073
	/* Give the current vmcb to the guest */
J
Joerg Roedel 已提交
3074 3075 3076 3077 3078 3079 3080 3081
	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;
3082
	nested_vmcb->save.efer   = svm->vcpu.arch.efer;
3083
	nested_vmcb->save.cr0    = kvm_read_cr0(&svm->vcpu);
3084
	nested_vmcb->save.cr3    = kvm_read_cr3(&svm->vcpu);
J
Joerg Roedel 已提交
3085
	nested_vmcb->save.cr2    = vmcb->save.cr2;
3086
	nested_vmcb->save.cr4    = svm->vcpu.arch.cr4;
3087
	nested_vmcb->save.rflags = kvm_get_rflags(&svm->vcpu);
J
Joerg Roedel 已提交
3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103
	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;
3104 3105 3106

	if (svm->nrips_enabled)
		nested_vmcb->control.next_rip  = vmcb->control.next_rip;
3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122

	/*
	 * 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
3123 3124 3125
	nested_vmcb->control.tlb_ctl           = 0;
	nested_vmcb->control.event_inj         = 0;
	nested_vmcb->control.event_inj_err     = 0;
3126 3127 3128 3129 3130 3131

	/* 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 */
3132
	copy_vmcb_control_area(vmcb, hsave);
3133

3134 3135
	kvm_clear_exception_queue(&svm->vcpu);
	kvm_clear_interrupt_queue(&svm->vcpu);
3136

3137 3138
	svm->nested.nested_cr3 = 0;

3139 3140 3141 3142 3143 3144 3145
	/* 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;
3146
	kvm_set_rflags(&svm->vcpu, hsave->save.rflags);
3147 3148 3149 3150 3151 3152 3153
	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 {
3154
		(void)kvm_set_cr3(&svm->vcpu, hsave->save.cr3);
3155 3156 3157 3158 3159 3160 3161 3162
	}
	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;

3163 3164
	mark_all_dirty(svm->vmcb);

3165
	nested_svm_unmap(page);
3166

3167
	nested_svm_uninit_mmu_context(&svm->vcpu);
3168 3169 3170 3171 3172
	kvm_mmu_reset_context(&svm->vcpu);
	kvm_mmu_load(&svm->vcpu);

	return 0;
}
A
Alexander Graf 已提交
3173

3174
static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3175
{
3176 3177
	/*
	 * This function merges the msr permission bitmaps of kvm and the
G
Guo Chao 已提交
3178
	 * nested vmcb. It is optimized in that it only merges the parts where
3179 3180
	 * the kvm msr permission bitmap may contain zero bits
	 */
A
Alexander Graf 已提交
3181
	int i;
3182

3183 3184
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
		return true;
3185

3186 3187 3188
	for (i = 0; i < MSRPM_OFFSETS; i++) {
		u32 value, p;
		u64 offset;
3189

3190 3191
		if (msrpm_offsets[i] == 0xffffffff)
			break;
A
Alexander Graf 已提交
3192

3193 3194
		p      = msrpm_offsets[i];
		offset = svm->nested.vmcb_msrpm + (p * 4);
3195

3196
		if (kvm_vcpu_read_guest(&svm->vcpu, offset, &value, 4))
3197 3198 3199 3200
			return false;

		svm->nested.msrpm[p] = svm->msrpm[p] | value;
	}
A
Alexander Graf 已提交
3201

3202
	svm->vmcb->control.msrpm_base_pa = __sme_set(__pa(svm->nested.msrpm));
3203 3204

	return true;
A
Alexander Graf 已提交
3205 3206
}

3207 3208 3209 3210 3211
static bool nested_vmcb_checks(struct vmcb *vmcb)
{
	if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0)
		return false;

3212 3213 3214
	if (vmcb->control.asid == 0)
		return false;

3215 3216
	if ((vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) &&
	    !npt_enabled)
3217 3218
		return false;

3219 3220 3221
	return true;
}

L
Ladi Prosek 已提交
3222 3223
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
3224
{
3225
	if (kvm_get_rflags(&svm->vcpu) & X86_EFLAGS_IF)
A
Alexander Graf 已提交
3226 3227 3228 3229
		svm->vcpu.arch.hflags |= HF_HIF_MASK;
	else
		svm->vcpu.arch.hflags &= ~HF_HIF_MASK;

3230
	if (nested_vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) {
3231 3232 3233 3234 3235
		kvm_mmu_unload(&svm->vcpu);
		svm->nested.nested_cr3 = nested_vmcb->control.nested_cr3;
		nested_svm_init_mmu_context(&svm->vcpu);
	}

A
Alexander Graf 已提交
3236 3237 3238 3239 3240 3241 3242
	/* 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;
3243
	kvm_set_rflags(&svm->vcpu, nested_vmcb->save.rflags);
A
Alexander Graf 已提交
3244 3245 3246 3247 3248 3249
	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;
3250
	} else
3251
		(void)kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3);
3252 3253 3254 3255

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

J
Joerg Roedel 已提交
3256
	svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2;
A
Alexander Graf 已提交
3257 3258 3259
	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
3260

A
Alexander Graf 已提交
3261 3262 3263 3264 3265 3266 3267 3268
	/* 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;

3269
	svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa & ~0x0fffULL;
3270
	svm->nested.vmcb_iopm  = nested_vmcb->control.iopm_base_pa  & ~0x0fffULL;
A
Alexander Graf 已提交
3271

J
Joerg Roedel 已提交
3272
	/* cache intercepts */
3273
	svm->nested.intercept_cr         = nested_vmcb->control.intercept_cr;
3274
	svm->nested.intercept_dr         = nested_vmcb->control.intercept_dr;
J
Joerg Roedel 已提交
3275 3276 3277
	svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions;
	svm->nested.intercept            = nested_vmcb->control.intercept;

3278
	svm_flush_tlb(&svm->vcpu);
A
Alexander Graf 已提交
3279 3280 3281 3282 3283 3284
	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;

3285 3286
	if (svm->vcpu.arch.hflags & HF_VINTR_MASK) {
		/* We only want the cr8 intercept bits of the guest */
3287 3288
		clr_cr_intercept(svm, INTERCEPT_CR8_READ);
		clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
3289 3290
	}

3291
	/* We don't want to see VMMCALLs from a nested guest */
3292
	clr_intercept(svm, INTERCEPT_VMMCALL);
3293

3294
	svm->vmcb->control.virt_ext = nested_vmcb->control.virt_ext;
A
Alexander Graf 已提交
3295 3296 3297 3298 3299 3300
	svm->vmcb->control.int_vector = nested_vmcb->control.int_vector;
	svm->vmcb->control.int_state = nested_vmcb->control.int_state;
	svm->vmcb->control.tsc_offset += nested_vmcb->control.tsc_offset;
	svm->vmcb->control.event_inj = nested_vmcb->control.event_inj;
	svm->vmcb->control.event_inj_err = nested_vmcb->control.event_inj_err;

3301
	nested_svm_unmap(page);
3302

3303 3304 3305
	/* Enter Guest-Mode */
	enter_guest_mode(&svm->vcpu);

3306 3307 3308 3309 3310 3311
	/*
	 * Merge guest and host intercepts - must be called  with vcpu in
	 * guest-mode to take affect here
	 */
	recalc_intercepts(svm);

3312
	svm->nested.vmcb = vmcb_gpa;
3313

3314
	enable_gif(svm);
A
Alexander Graf 已提交
3315

3316
	mark_all_dirty(svm->vmcb);
L
Ladi Prosek 已提交
3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383
}

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);
3384

3385
	return true;
A
Alexander Graf 已提交
3386 3387
}

3388
static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403
{
	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
3404
static int vmload_interception(struct vcpu_svm *svm)
3405
{
3406
	struct vmcb *nested_vmcb;
3407
	struct page *page;
3408
	int ret;
3409

3410 3411 3412
	if (nested_svm_check_permissions(svm))
		return 1;

3413
	nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
3414 3415 3416
	if (!nested_vmcb)
		return 1;

3417
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3418
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3419

3420
	nested_svm_vmloadsave(nested_vmcb, svm->vmcb);
3421
	nested_svm_unmap(page);
3422

3423
	return ret;
3424 3425
}

A
Avi Kivity 已提交
3426
static int vmsave_interception(struct vcpu_svm *svm)
3427
{
3428
	struct vmcb *nested_vmcb;
3429
	struct page *page;
3430
	int ret;
3431

3432 3433 3434
	if (nested_svm_check_permissions(svm))
		return 1;

3435
	nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
3436 3437 3438
	if (!nested_vmcb)
		return 1;

3439
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3440
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3441

3442
	nested_svm_vmloadsave(svm->vmcb, nested_vmcb);
3443
	nested_svm_unmap(page);
3444

3445
	return ret;
3446 3447
}

A
Avi Kivity 已提交
3448
static int vmrun_interception(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3449 3450 3451 3452
{
	if (nested_svm_check_permissions(svm))
		return 1;

3453 3454
	/* Save rip after vmrun instruction */
	kvm_rip_write(&svm->vcpu, kvm_rip_read(&svm->vcpu) + 3);
A
Alexander Graf 已提交
3455

3456
	if (!nested_svm_vmrun(svm))
A
Alexander Graf 已提交
3457 3458
		return 1;

3459
	if (!nested_svm_vmrun_msrpm(svm))
3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471
		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
3472 3473 3474 3475

	return 1;
}

A
Avi Kivity 已提交
3476
static int stgi_interception(struct vcpu_svm *svm)
3477
{
3478 3479
	int ret;

3480 3481 3482
	if (nested_svm_check_permissions(svm))
		return 1;

3483 3484
	/*
	 * If VGIF is enabled, the STGI intercept is only added to
3485
	 * detect the opening of the SMI/NMI window; remove it now.
3486 3487 3488 3489
	 */
	if (vgif_enabled(svm))
		clr_intercept(svm, INTERCEPT_STGI);

3490
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3491
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3492
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3493

3494
	enable_gif(svm);
3495

3496
	return ret;
3497 3498
}

A
Avi Kivity 已提交
3499
static int clgi_interception(struct vcpu_svm *svm)
3500
{
3501 3502
	int ret;

3503 3504 3505 3506
	if (nested_svm_check_permissions(svm))
		return 1;

	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3507
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3508

3509
	disable_gif(svm);
3510 3511

	/* After a CLGI no interrupts should come */
3512 3513 3514 3515 3516
	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);
	}
3517

3518
	return ret;
3519 3520
}

A
Avi Kivity 已提交
3521
static int invlpga_interception(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3522 3523 3524
{
	struct kvm_vcpu *vcpu = &svm->vcpu;

3525 3526
	trace_kvm_invlpga(svm->vmcb->save.rip, kvm_register_read(&svm->vcpu, VCPU_REGS_RCX),
			  kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
3527

A
Alexander Graf 已提交
3528
	/* Let's treat INVLPGA the same as INVLPG (can be optimized!) */
3529
	kvm_mmu_invlpg(vcpu, kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
A
Alexander Graf 已提交
3530 3531

	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3532
	return kvm_skip_emulated_instruction(&svm->vcpu);
A
Alexander Graf 已提交
3533 3534
}

3535 3536
static int skinit_interception(struct vcpu_svm *svm)
{
3537
	trace_kvm_skinit(svm->vmcb->save.rip, kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
3538 3539 3540 3541 3542

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

D
David Kaplan 已提交
3543 3544
static int wbinvd_interception(struct vcpu_svm *svm)
{
3545
	return kvm_emulate_wbinvd(&svm->vcpu);
D
David Kaplan 已提交
3546 3547
}

J
Joerg Roedel 已提交
3548 3549 3550 3551 3552 3553 3554
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;
3555
		return kvm_skip_emulated_instruction(&svm->vcpu);
J
Joerg Roedel 已提交
3556 3557 3558 3559 3560
	}

	return 1;
}

A
Avi Kivity 已提交
3561
static int task_switch_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3562
{
3563
	u16 tss_selector;
3564 3565 3566
	int reason;
	int int_type = svm->vmcb->control.exit_int_info &
		SVM_EXITINTINFO_TYPE_MASK;
3567
	int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK;
3568 3569 3570 3571
	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;
3572 3573
	bool has_error_code = false;
	u32 error_code = 0;
3574 3575

	tss_selector = (u16)svm->vmcb->control.exit_info_1;
3576

3577 3578
	if (svm->vmcb->control.exit_info_2 &
	    (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET))
3579 3580 3581 3582
		reason = TASK_SWITCH_IRET;
	else if (svm->vmcb->control.exit_info_2 &
		 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP))
		reason = TASK_SWITCH_JMP;
3583
	else if (idt_v)
3584 3585 3586 3587
		reason = TASK_SWITCH_GATE;
	else
		reason = TASK_SWITCH_CALL;

3588 3589 3590 3591 3592 3593
	if (reason == TASK_SWITCH_GATE) {
		switch (type) {
		case SVM_EXITINTINFO_TYPE_NMI:
			svm->vcpu.arch.nmi_injected = false;
			break;
		case SVM_EXITINTINFO_TYPE_EXEPT:
3594 3595 3596 3597 3598 3599
			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;
			}
3600 3601 3602 3603 3604 3605 3606 3607 3608
			kvm_clear_exception_queue(&svm->vcpu);
			break;
		case SVM_EXITINTINFO_TYPE_INTR:
			kvm_clear_interrupt_queue(&svm->vcpu);
			break;
		default:
			break;
		}
	}
3609

3610 3611 3612
	if (reason != TASK_SWITCH_GATE ||
	    int_type == SVM_EXITINTINFO_TYPE_SOFT ||
	    (int_type == SVM_EXITINTINFO_TYPE_EXEPT &&
3613 3614
	     (int_vec == OF_VECTOR || int_vec == BP_VECTOR)))
		skip_emulated_instruction(&svm->vcpu);
3615

3616 3617 3618 3619
	if (int_type != SVM_EXITINTINFO_TYPE_SOFT)
		int_vec = -1;

	if (kvm_task_switch(&svm->vcpu, tss_selector, int_vec, reason,
3620 3621 3622 3623 3624 3625 3626
				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
3627 3628
}

A
Avi Kivity 已提交
3629
static int cpuid_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3630
{
3631
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
3632
	return kvm_emulate_cpuid(&svm->vcpu);
A
Avi Kivity 已提交
3633 3634
}

A
Avi Kivity 已提交
3635
static int iret_interception(struct vcpu_svm *svm)
3636 3637
{
	++svm->vcpu.stat.nmi_window_exits;
3638
	clr_intercept(svm, INTERCEPT_IRET);
3639
	svm->vcpu.arch.hflags |= HF_IRET_MASK;
3640
	svm->nmi_iret_rip = kvm_rip_read(&svm->vcpu);
3641
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3642 3643 3644
	return 1;
}

A
Avi Kivity 已提交
3645
static int invlpg_interception(struct vcpu_svm *svm)
M
Marcelo Tosatti 已提交
3646
{
3647 3648 3649 3650
	if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
		return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;

	kvm_mmu_invlpg(&svm->vcpu, svm->vmcb->control.exit_info_1);
3651
	return kvm_skip_emulated_instruction(&svm->vcpu);
M
Marcelo Tosatti 已提交
3652 3653
}

A
Avi Kivity 已提交
3654
static int emulate_on_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3655
{
3656
	return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
A
Avi Kivity 已提交
3657 3658
}

A
Avi Kivity 已提交
3659 3660 3661 3662 3663 3664 3665 3666
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);
3667
	return kvm_complete_insn_gp(&svm->vcpu, err);
A
Avi Kivity 已提交
3668 3669
}

3670 3671
static bool check_selective_cr0_intercepted(struct vcpu_svm *svm,
					    unsigned long val)
3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693
{
	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;
}

3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708
#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;
3709 3710 3711 3712
	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;
3713 3714 3715 3716 3717 3718 3719

	err = 0;
	if (cr >= 16) { /* mov to cr */
		cr -= 16;
		val = kvm_register_read(&svm->vcpu, reg);
		switch (cr) {
		case 0:
3720 3721
			if (!check_selective_cr0_intercepted(svm, val))
				err = kvm_set_cr0(&svm->vcpu, val);
3722 3723 3724
			else
				return 1;

3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748
			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:
3749
			val = kvm_read_cr3(&svm->vcpu);
3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763
			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);
	}
3764
	return kvm_complete_insn_gp(&svm->vcpu, err);
3765 3766
}

3767 3768 3769 3770 3771
static int dr_interception(struct vcpu_svm *svm)
{
	int reg, dr;
	unsigned long val;

3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782
	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;
	}

3783 3784 3785 3786 3787 3788 3789
	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 */
3790 3791
		if (!kvm_require_dr(&svm->vcpu, dr - 16))
			return 1;
3792 3793 3794
		val = kvm_register_read(&svm->vcpu, reg);
		kvm_set_dr(&svm->vcpu, dr - 16, val);
	} else {
3795 3796 3797 3798
		if (!kvm_require_dr(&svm->vcpu, dr))
			return 1;
		kvm_get_dr(&svm->vcpu, dr, &val);
		kvm_register_write(&svm->vcpu, reg, val);
3799 3800
	}

3801
	return kvm_skip_emulated_instruction(&svm->vcpu);
3802 3803
}

A
Avi Kivity 已提交
3804
static int cr8_write_interception(struct vcpu_svm *svm)
3805
{
A
Avi Kivity 已提交
3806
	struct kvm_run *kvm_run = svm->vcpu.run;
A
Andre Przywara 已提交
3807
	int r;
A
Avi Kivity 已提交
3808

3809 3810
	u8 cr8_prev = kvm_get_cr8(&svm->vcpu);
	/* instruction emulation calls kvm_set_cr8() */
3811
	r = cr_interception(svm);
3812
	if (lapic_in_kernel(&svm->vcpu))
3813
		return r;
3814
	if (cr8_prev <= kvm_get_cr8(&svm->vcpu))
3815
		return r;
3816 3817 3818 3819
	kvm_run->exit_reason = KVM_EXIT_SET_TPR;
	return 0;
}

3820
static int svm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
A
Avi Kivity 已提交
3821
{
3822 3823
	struct vcpu_svm *svm = to_svm(vcpu);

3824
	switch (msr_info->index) {
3825
	case MSR_IA32_TSC: {
3826
		msr_info->data = svm->vmcb->control.tsc_offset +
3827
			kvm_scale_tsc(vcpu, rdtsc());
3828

A
Avi Kivity 已提交
3829 3830
		break;
	}
B
Brian Gerst 已提交
3831
	case MSR_STAR:
3832
		msr_info->data = svm->vmcb->save.star;
A
Avi Kivity 已提交
3833
		break;
3834
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
3835
	case MSR_LSTAR:
3836
		msr_info->data = svm->vmcb->save.lstar;
A
Avi Kivity 已提交
3837 3838
		break;
	case MSR_CSTAR:
3839
		msr_info->data = svm->vmcb->save.cstar;
A
Avi Kivity 已提交
3840 3841
		break;
	case MSR_KERNEL_GS_BASE:
3842
		msr_info->data = svm->vmcb->save.kernel_gs_base;
A
Avi Kivity 已提交
3843 3844
		break;
	case MSR_SYSCALL_MASK:
3845
		msr_info->data = svm->vmcb->save.sfmask;
A
Avi Kivity 已提交
3846 3847 3848
		break;
#endif
	case MSR_IA32_SYSENTER_CS:
3849
		msr_info->data = svm->vmcb->save.sysenter_cs;
A
Avi Kivity 已提交
3850 3851
		break;
	case MSR_IA32_SYSENTER_EIP:
3852
		msr_info->data = svm->sysenter_eip;
A
Avi Kivity 已提交
3853 3854
		break;
	case MSR_IA32_SYSENTER_ESP:
3855
		msr_info->data = svm->sysenter_esp;
A
Avi Kivity 已提交
3856
		break;
P
Paolo Bonzini 已提交
3857 3858 3859 3860 3861
	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
3862 3863 3864 3865 3866
	/*
	 * 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.
	 */
3867
	case MSR_IA32_DEBUGCTLMSR:
3868
		msr_info->data = svm->vmcb->save.dbgctl;
3869 3870
		break;
	case MSR_IA32_LASTBRANCHFROMIP:
3871
		msr_info->data = svm->vmcb->save.br_from;
3872 3873
		break;
	case MSR_IA32_LASTBRANCHTOIP:
3874
		msr_info->data = svm->vmcb->save.br_to;
3875 3876
		break;
	case MSR_IA32_LASTINTFROMIP:
3877
		msr_info->data = svm->vmcb->save.last_excp_from;
3878 3879
		break;
	case MSR_IA32_LASTINTTOIP:
3880
		msr_info->data = svm->vmcb->save.last_excp_to;
3881
		break;
A
Alexander Graf 已提交
3882
	case MSR_VM_HSAVE_PA:
3883
		msr_info->data = svm->nested.hsave_msr;
A
Alexander Graf 已提交
3884
		break;
3885
	case MSR_VM_CR:
3886
		msr_info->data = svm->nested.vm_cr_msr;
3887
		break;
3888
	case MSR_IA32_UCODE_REV:
3889
		msr_info->data = 0x01000065;
3890
		break;
3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907
	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;
A
Avi Kivity 已提交
3908
	default:
3909
		return kvm_get_msr_common(vcpu, msr_info);
A
Avi Kivity 已提交
3910 3911 3912 3913
	}
	return 0;
}

A
Avi Kivity 已提交
3914
static int rdmsr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3915
{
3916
	u32 ecx = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
3917
	struct msr_data msr_info;
A
Avi Kivity 已提交
3918

3919 3920 3921
	msr_info.index = ecx;
	msr_info.host_initiated = false;
	if (svm_get_msr(&svm->vcpu, &msr_info)) {
3922
		trace_kvm_msr_read_ex(ecx);
3923
		kvm_inject_gp(&svm->vcpu, 0);
3924
		return 1;
3925
	} else {
3926
		trace_kvm_msr_read(ecx, msr_info.data);
3927

3928 3929 3930 3931
		kvm_register_write(&svm->vcpu, VCPU_REGS_RAX,
				   msr_info.data & 0xffffffff);
		kvm_register_write(&svm->vcpu, VCPU_REGS_RDX,
				   msr_info.data >> 32);
3932
		svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
3933
		return kvm_skip_emulated_instruction(&svm->vcpu);
A
Avi Kivity 已提交
3934 3935 3936
	}
}

3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961
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;
}

3962
static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
A
Avi Kivity 已提交
3963
{
3964 3965
	struct vcpu_svm *svm = to_svm(vcpu);

3966 3967
	u32 ecx = msr->index;
	u64 data = msr->data;
A
Avi Kivity 已提交
3968
	switch (ecx) {
P
Paolo Bonzini 已提交
3969 3970 3971 3972 3973 3974 3975
	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;
3976
	case MSR_IA32_TSC:
3977
		kvm_write_tsc(vcpu, msr);
A
Avi Kivity 已提交
3978
		break;
B
Brian Gerst 已提交
3979
	case MSR_STAR:
3980
		svm->vmcb->save.star = data;
A
Avi Kivity 已提交
3981
		break;
3982
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
3983
	case MSR_LSTAR:
3984
		svm->vmcb->save.lstar = data;
A
Avi Kivity 已提交
3985 3986
		break;
	case MSR_CSTAR:
3987
		svm->vmcb->save.cstar = data;
A
Avi Kivity 已提交
3988 3989
		break;
	case MSR_KERNEL_GS_BASE:
3990
		svm->vmcb->save.kernel_gs_base = data;
A
Avi Kivity 已提交
3991 3992
		break;
	case MSR_SYSCALL_MASK:
3993
		svm->vmcb->save.sfmask = data;
A
Avi Kivity 已提交
3994 3995 3996
		break;
#endif
	case MSR_IA32_SYSENTER_CS:
3997
		svm->vmcb->save.sysenter_cs = data;
A
Avi Kivity 已提交
3998 3999
		break;
	case MSR_IA32_SYSENTER_EIP:
4000
		svm->sysenter_eip = data;
4001
		svm->vmcb->save.sysenter_eip = data;
A
Avi Kivity 已提交
4002 4003
		break;
	case MSR_IA32_SYSENTER_ESP:
4004
		svm->sysenter_esp = data;
4005
		svm->vmcb->save.sysenter_esp = data;
A
Avi Kivity 已提交
4006
		break;
P
Paolo Bonzini 已提交
4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018
	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;
4019
	case MSR_IA32_DEBUGCTLMSR:
4020
		if (!boot_cpu_has(X86_FEATURE_LBRV)) {
4021 4022
			vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n",
				    __func__, data);
4023 4024 4025 4026 4027 4028
			break;
		}
		if (data & DEBUGCTL_RESERVED_BITS)
			return 1;

		svm->vmcb->save.dbgctl = data;
4029
		mark_dirty(svm->vmcb, VMCB_LBR);
4030 4031 4032 4033
		if (data & (1ULL<<0))
			svm_enable_lbrv(svm);
		else
			svm_disable_lbrv(svm);
4034
		break;
A
Alexander Graf 已提交
4035
	case MSR_VM_HSAVE_PA:
4036
		svm->nested.hsave_msr = data;
4037
		break;
4038
	case MSR_VM_CR:
4039
		return svm_set_vm_cr(vcpu, data);
4040
	case MSR_VM_IGNNE:
4041
		vcpu_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data);
4042
		break;
4043 4044 4045 4046
	case MSR_IA32_APICBASE:
		if (kvm_vcpu_apicv_active(vcpu))
			avic_update_vapic_bar(to_svm(vcpu), data);
		/* Follow through */
A
Avi Kivity 已提交
4047
	default:
4048
		return kvm_set_msr_common(vcpu, msr);
A
Avi Kivity 已提交
4049 4050 4051 4052
	}
	return 0;
}

A
Avi Kivity 已提交
4053
static int wrmsr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4054
{
4055
	struct msr_data msr;
4056 4057
	u32 ecx = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
	u64 data = kvm_read_edx_eax(&svm->vcpu);
4058

4059 4060 4061
	msr.data = data;
	msr.index = ecx;
	msr.host_initiated = false;
4062

4063
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
4064
	if (kvm_set_msr(&svm->vcpu, &msr)) {
4065
		trace_kvm_msr_write_ex(ecx, data);
4066
		kvm_inject_gp(&svm->vcpu, 0);
4067
		return 1;
4068 4069
	} else {
		trace_kvm_msr_write(ecx, data);
4070
		return kvm_skip_emulated_instruction(&svm->vcpu);
4071
	}
A
Avi Kivity 已提交
4072 4073
}

A
Avi Kivity 已提交
4074
static int msr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4075
{
R
Rusty Russell 已提交
4076
	if (svm->vmcb->control.exit_info_1)
A
Avi Kivity 已提交
4077
		return wrmsr_interception(svm);
A
Avi Kivity 已提交
4078
	else
A
Avi Kivity 已提交
4079
		return rdmsr_interception(svm);
A
Avi Kivity 已提交
4080 4081
}

A
Avi Kivity 已提交
4082
static int interrupt_window_interception(struct vcpu_svm *svm)
4083
{
4084
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
4085
	svm_clear_vintr(svm);
4086
	svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
4087
	mark_dirty(svm->vmcb, VMCB_INTR);
4088
	++svm->vcpu.stat.irq_window_exits;
4089 4090 4091
	return 1;
}

4092 4093
static int pause_interception(struct vcpu_svm *svm)
{
4094 4095 4096 4097
	struct kvm_vcpu *vcpu = &svm->vcpu;
	bool in_kernel = (svm_get_cpl(vcpu) == 0);

	kvm_vcpu_on_spin(vcpu, in_kernel);
4098 4099 4100
	return 1;
}

4101 4102
static int nop_interception(struct vcpu_svm *svm)
{
4103
	return kvm_skip_emulated_instruction(&(svm->vcpu));
4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117
}

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);
}

4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129
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
4130
	u32 index = svm->vmcb->control.exit_info_2 & 0xFF;
4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169 4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315 4316 4317 4318 4319 4320 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334 4335 4336 4337 4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361 4362 4363 4364 4365 4366 4367 4368 4369 4370 4371 4372 4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388 4389
	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: {
		int i;
		struct kvm_vcpu *vcpu;
		struct kvm *kvm = svm->vcpu.kvm;
		struct kvm_lapic *apic = svm->vcpu.arch.apic;

		/*
		 * 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.
		 */
		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);
		}
		break;
	}
	case AVIC_IPI_FAILURE_INVALID_TARGET:
		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)
{
	struct kvm_arch *vm_data = &vcpu->kvm->arch;
	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;
	}

	logical_apic_id_table = (u32 *) page_address(vm_data->avic_logical_id_table_page);

	return &logical_apic_id_table[index];
}

static int avic_ldr_write(struct kvm_vcpu *vcpu, u8 g_physical_id, u32 ldr,
			  bool valid)
{
	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);
	if (valid)
		new_entry |= AVIC_LOGICAL_ID_ENTRY_VALID_MASK;
	else
		new_entry &= ~AVIC_LOGICAL_ID_ENTRY_VALID_MASK;
	WRITE_ONCE(*entry, new_entry);

	return 0;
}

static int avic_handle_ldr_update(struct kvm_vcpu *vcpu)
{
	int ret;
	struct vcpu_svm *svm = to_svm(vcpu);
	u32 ldr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_LDR);

	if (!ldr)
		return 1;

	ret = avic_ldr_write(vcpu, vcpu->vcpu_id, ldr, true);
	if (ret && svm->ldr_reg) {
		avic_ldr_write(vcpu, 0, svm->ldr_reg, false);
		svm->ldr_reg = 0;
	} else {
		svm->ldr_reg = ldr;
	}
	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;
}

static int avic_handle_dfr_update(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct kvm_arch *vm_data = &vcpu->kvm->arch;
	u32 dfr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_DFR);
	u32 mod = (dfr >> 28) & 0xf;

	/*
	 * We assume that all local APICs are using the same type.
	 * If this changes, we need to flush the AVIC logical
	 * APID id table.
	 */
	if (vm_data->ldr_mode == mod)
		return 0;

	clear_page(page_address(vm_data->avic_logical_id_table_page));
	vm_data->ldr_mode = mod;

	if (svm->ldr_reg)
		avic_handle_ldr_update(vcpu);
	return 0;
}

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 */
		ret = (emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE);
	}

	return ret;
}

4390
static int (*const svm_exit_handlers[])(struct vcpu_svm *svm) = {
4391 4392 4393 4394
	[SVM_EXIT_READ_CR0]			= cr_interception,
	[SVM_EXIT_READ_CR3]			= cr_interception,
	[SVM_EXIT_READ_CR4]			= cr_interception,
	[SVM_EXIT_READ_CR8]			= cr_interception,
4395
	[SVM_EXIT_CR0_SEL_WRITE]		= cr_interception,
4396
	[SVM_EXIT_WRITE_CR0]			= cr_interception,
4397 4398
	[SVM_EXIT_WRITE_CR3]			= cr_interception,
	[SVM_EXIT_WRITE_CR4]			= cr_interception,
J
Joerg Roedel 已提交
4399
	[SVM_EXIT_WRITE_CR8]			= cr8_write_interception,
4400 4401 4402 4403 4404 4405 4406 4407 4408 4409 4410 4411 4412 4413 4414 4415
	[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
4416 4417
	[SVM_EXIT_EXCP_BASE + DB_VECTOR]	= db_interception,
	[SVM_EXIT_EXCP_BASE + BP_VECTOR]	= bp_interception,
4418
	[SVM_EXIT_EXCP_BASE + UD_VECTOR]	= ud_interception,
J
Joerg Roedel 已提交
4419 4420
	[SVM_EXIT_EXCP_BASE + PF_VECTOR]	= pf_interception,
	[SVM_EXIT_EXCP_BASE + MC_VECTOR]	= mc_interception,
4421
	[SVM_EXIT_EXCP_BASE + AC_VECTOR]	= ac_interception,
J
Joerg Roedel 已提交
4422
	[SVM_EXIT_INTR]				= intr_interception,
4423
	[SVM_EXIT_NMI]				= nmi_interception,
A
Avi Kivity 已提交
4424 4425
	[SVM_EXIT_SMI]				= nop_on_interception,
	[SVM_EXIT_INIT]				= nop_on_interception,
4426
	[SVM_EXIT_VINTR]			= interrupt_window_interception,
A
Avi Kivity 已提交
4427
	[SVM_EXIT_RDPMC]			= rdpmc_interception,
A
Avi Kivity 已提交
4428
	[SVM_EXIT_CPUID]			= cpuid_interception,
4429
	[SVM_EXIT_IRET]                         = iret_interception,
4430
	[SVM_EXIT_INVD]                         = emulate_on_interception,
4431
	[SVM_EXIT_PAUSE]			= pause_interception,
A
Avi Kivity 已提交
4432
	[SVM_EXIT_HLT]				= halt_interception,
M
Marcelo Tosatti 已提交
4433
	[SVM_EXIT_INVLPG]			= invlpg_interception,
A
Alexander Graf 已提交
4434
	[SVM_EXIT_INVLPGA]			= invlpga_interception,
J
Joerg Roedel 已提交
4435
	[SVM_EXIT_IOIO]				= io_interception,
A
Avi Kivity 已提交
4436 4437
	[SVM_EXIT_MSR]				= msr_interception,
	[SVM_EXIT_TASK_SWITCH]			= task_switch_interception,
4438
	[SVM_EXIT_SHUTDOWN]			= shutdown_interception,
A
Alexander Graf 已提交
4439
	[SVM_EXIT_VMRUN]			= vmrun_interception,
4440
	[SVM_EXIT_VMMCALL]			= vmmcall_interception,
4441 4442
	[SVM_EXIT_VMLOAD]			= vmload_interception,
	[SVM_EXIT_VMSAVE]			= vmsave_interception,
4443 4444
	[SVM_EXIT_STGI]				= stgi_interception,
	[SVM_EXIT_CLGI]				= clgi_interception,
4445
	[SVM_EXIT_SKINIT]			= skinit_interception,
D
David Kaplan 已提交
4446
	[SVM_EXIT_WBINVD]                       = wbinvd_interception,
4447 4448
	[SVM_EXIT_MONITOR]			= monitor_interception,
	[SVM_EXIT_MWAIT]			= mwait_interception,
J
Joerg Roedel 已提交
4449
	[SVM_EXIT_XSETBV]			= xsetbv_interception,
4450
	[SVM_EXIT_NPF]				= npf_interception,
P
Paolo Bonzini 已提交
4451
	[SVM_EXIT_RSM]                          = emulate_on_interception,
4452 4453
	[SVM_EXIT_AVIC_INCOMPLETE_IPI]		= avic_incomplete_ipi_interception,
	[SVM_EXIT_AVIC_UNACCELERATED_ACCESS]	= avic_unaccelerated_access_interception,
A
Avi Kivity 已提交
4454 4455
};

4456
static void dump_vmcb(struct kvm_vcpu *vcpu)
4457 4458 4459 4460 4461 4462
{
	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");
4463 4464 4465 4466 4467 4468 4469 4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484
	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);
	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);
4485
	pr_err("%-20s%016llx\n", "avic_vapic_bar:", control->avic_vapic_bar);
4486 4487
	pr_err("%-20s%08x\n", "event_inj:", control->event_inj);
	pr_err("%-20s%08x\n", "event_inj_err:", control->event_inj_err);
4488
	pr_err("%-20s%lld\n", "virt_ext:", control->virt_ext);
4489
	pr_err("%-20s%016llx\n", "next_rip:", control->next_rip);
4490 4491 4492
	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);
4493
	pr_err("VMCB State Save Area:\n");
4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530 4531 4532 4533
	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);
4534 4535
	pr_err("cpl:            %d                efer:         %016llx\n",
		save->cpl, save->efer);
4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562
	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);
4563 4564
}

4565 4566 4567 4568 4569 4570 4571 4572
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
4573
static int handle_exit(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
4574
{
4575
	struct vcpu_svm *svm = to_svm(vcpu);
A
Avi Kivity 已提交
4576
	struct kvm_run *kvm_run = vcpu->run;
4577
	u32 exit_code = svm->vmcb->control.exit_code;
A
Avi Kivity 已提交
4578

4579 4580
	trace_kvm_exit(exit_code, vcpu, KVM_ISA_SVM);

4581
	if (!is_cr_intercept(svm, INTERCEPT_CR0_WRITE))
4582 4583 4584
		vcpu->arch.cr0 = svm->vmcb->save.cr0;
	if (npt_enabled)
		vcpu->arch.cr3 = svm->vmcb->save.cr3;
4585

4586 4587 4588 4589 4590 4591 4592
	if (unlikely(svm->nested.exit_required)) {
		nested_svm_vmexit(svm);
		svm->nested.exit_required = false;

		return 1;
	}

4593
	if (is_guest_mode(vcpu)) {
4594 4595
		int vmexit;

4596 4597 4598 4599
		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,
4600 4601
					svm->vmcb->control.exit_int_info_err,
					KVM_ISA_SVM);
4602

4603 4604 4605 4606 4607 4608
		vmexit = nested_svm_exit_special(svm);

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

		if (vmexit == NESTED_EXIT_DONE)
4609 4610 4611
			return 1;
	}

4612 4613
	svm_complete_interrupts(svm);

4614 4615 4616 4617
	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;
4618 4619
		pr_err("KVM: FAILED VMRUN WITH VMCB:\n");
		dump_vmcb(vcpu);
4620 4621 4622
		return 0;
	}

4623
	if (is_external_interrupt(svm->vmcb->control.exit_int_info) &&
4624
	    exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR &&
4625 4626
	    exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH &&
	    exit_code != SVM_EXIT_INTR && exit_code != SVM_EXIT_NMI)
4627
		printk(KERN_ERR "%s: unexpected exit_int_info 0x%x "
A
Avi Kivity 已提交
4628
		       "exit_code 0x%x\n",
4629
		       __func__, svm->vmcb->control.exit_int_info,
A
Avi Kivity 已提交
4630 4631
		       exit_code);

4632
	if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
J
Joe Perches 已提交
4633
	    || !svm_exit_handlers[exit_code]) {
4634
		WARN_ONCE(1, "svm: unexpected exit reason 0x%x\n", exit_code);
4635 4636
		kvm_queue_exception(vcpu, UD_VECTOR);
		return 1;
A
Avi Kivity 已提交
4637 4638
	}

A
Avi Kivity 已提交
4639
	return svm_exit_handlers[exit_code](svm);
A
Avi Kivity 已提交
4640 4641 4642 4643 4644 4645
}

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

4646 4647
	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
4648 4649 4650
	load_TR_desc();
}

4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674
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
4675
static void pre_svm_run(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4676 4677 4678
{
	int cpu = raw_smp_processor_id();

4679
	struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
A
Avi Kivity 已提交
4680

4681 4682 4683
	if (sev_guest(svm->vcpu.kvm))
		return pre_sev_run(svm, cpu);

4684
	/* FIXME: handle wraparound of asid_generation */
4685 4686
	if (svm->asid_generation != sd->asid_generation)
		new_asid(svm, sd);
A
Avi Kivity 已提交
4687 4688
}

4689 4690 4691 4692 4693 4694
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;
4695
	set_intercept(svm, INTERCEPT_IRET);
4696 4697
	++vcpu->stat.nmi_injections;
}
A
Avi Kivity 已提交
4698

4699
static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
A
Avi Kivity 已提交
4700 4701 4702
{
	struct vmcb_control_area *control;

4703
	/* The following fields are ignored when AVIC is enabled */
R
Rusty Russell 已提交
4704
	control = &svm->vmcb->control;
4705
	control->int_vector = irq;
A
Avi Kivity 已提交
4706 4707 4708
	control->int_ctl &= ~V_INTR_PRIO_MASK;
	control->int_ctl |= V_IRQ_MASK |
		((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
4709
	mark_dirty(svm->vmcb, VMCB_INTR);
A
Avi Kivity 已提交
4710 4711
}

4712
static void svm_set_irq(struct kvm_vcpu *vcpu)
E
Eddie Dong 已提交
4713 4714 4715
{
	struct vcpu_svm *svm = to_svm(vcpu);

4716
	BUG_ON(!(gif_set(svm)));
4717

4718 4719 4720
	trace_kvm_inj_virq(vcpu->arch.interrupt.nr);
	++vcpu->stat.irq_injections;

4721 4722
	svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr |
		SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR;
E
Eddie Dong 已提交
4723 4724
}

4725 4726 4727 4728 4729
static inline bool svm_nested_virtualize_tpr(struct kvm_vcpu *vcpu)
{
	return is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK);
}

4730
static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
4731 4732 4733
{
	struct vcpu_svm *svm = to_svm(vcpu);

4734 4735
	if (svm_nested_virtualize_tpr(vcpu) ||
	    kvm_vcpu_apicv_active(vcpu))
4736 4737
		return;

4738 4739
	clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);

4740
	if (irr == -1)
4741 4742
		return;

4743
	if (tpr >= irr)
4744
		set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
4745
}
4746

4747 4748 4749 4750 4751
static void svm_set_virtual_x2apic_mode(struct kvm_vcpu *vcpu, bool set)
{
	return;
}

4752
static bool svm_get_enable_apicv(struct kvm_vcpu *vcpu)
4753
{
4754
	return avic && irqchip_split(vcpu->kvm);
4755 4756 4757 4758
}

static void svm_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr)
{
4759 4760
}

4761
static void svm_hwapic_isr_update(struct kvm_vcpu *vcpu, int max_isr)
4762
{
4763 4764
}

4765
/* Note: Currently only used by Hyper-V. */
4766
static void svm_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu)
4767
{
4768 4769 4770
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *vmcb = svm->vmcb;

4771
	if (!kvm_vcpu_apicv_active(&svm->vcpu))
4772 4773 4774 4775
		return;

	vmcb->control.int_ctl &= ~AVIC_ENABLE_MASK;
	mark_dirty(vmcb, VMCB_INTR);
4776 4777
}

4778
static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
4779 4780 4781 4782
{
	return;
}

4783 4784 4785 4786 4787 4788 4789
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,
4790
		       kvm_cpu_get_apicid(vcpu->cpu));
4791 4792 4793 4794
	else
		kvm_vcpu_wake_up(vcpu);
}

4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814 4815 4816 4817 4818 4819 4820 4821 4822 4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834 4835 4836 4837 4838 4839 4840 4841 4842 4843 4844 4845 4846 4847 4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883
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.
	 */
	ir = kzalloc(sizeof(struct amd_svm_iommu_ir), GFP_KERNEL);
	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);
4884
	vcpu_info->pi_desc_addr = __sme_set(page_to_phys((*svm)->avic_backing_page));
4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929 4930 4931 4932 4933 4934
	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 */
4935 4936
			pi.base = __sme_set(page_to_phys(svm->avic_backing_page) &
					    AVIC_HPA_MASK);
4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947 4948 4949 4950 4951 4952 4953 4954 4955 4956 4957 4958 4959 4960 4961 4962 4963 4964 4965 4966 4967 4968 4969 4970 4971 4972 4973 4974 4975 4976 4977 4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991 4992 4993 4994 4995 4996 4997 4998
			pi.ga_tag = AVIC_GATAG(kvm->arch.avic_vm_id,
						     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) {
			trace_kvm_pi_irte_update(svm->vcpu.vcpu_id,
						 host_irq, e->gsi,
						 vcpu_info.vector,
						 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;
}

4999 5000 5001 5002
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
5003 5004 5005 5006 5007 5008
	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;
5009 5010
}

J
Jan Kiszka 已提交
5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021 5022 5023
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;
5024
		set_intercept(svm, INTERCEPT_IRET);
J
Jan Kiszka 已提交
5025 5026
	} else {
		svm->vcpu.arch.hflags &= ~HF_NMI_MASK;
5027
		clr_intercept(svm, INTERCEPT_IRET);
J
Jan Kiszka 已提交
5028 5029 5030
	}
}

5031 5032 5033 5034
static int svm_interrupt_allowed(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *vmcb = svm->vmcb;
5035 5036 5037 5038 5039 5040
	int ret;

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

5041
	ret = !!(kvm_get_rflags(vcpu) & X86_EFLAGS_IF);
5042

5043
	if (is_guest_mode(vcpu))
5044 5045 5046
		return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK);

	return ret;
5047 5048
}

5049
static void enable_irq_window(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
5050
{
5051 5052
	struct vcpu_svm *svm = to_svm(vcpu);

5053 5054 5055
	if (kvm_vcpu_apicv_active(vcpu))
		return;

J
Joerg Roedel 已提交
5056 5057 5058 5059
	/*
	 * 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
5060 5061 5062
	 * 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
5063
	 */
5064
	if ((vgif_enabled(svm) || gif_set(svm)) && nested_svm_intr(svm)) {
5065 5066 5067
		svm_set_vintr(svm);
		svm_inject_irq(svm, 0x0);
	}
5068 5069
}

5070
static void enable_nmi_window(struct kvm_vcpu *vcpu)
5071
{
5072
	struct vcpu_svm *svm = to_svm(vcpu);
5073

5074 5075
	if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK))
	    == HF_NMI_MASK)
5076
		return; /* IRET will cause a vm exit */
5077

5078 5079 5080
	if (!gif_set(svm)) {
		if (vgif_enabled(svm))
			set_intercept(svm, INTERCEPT_STGI);
5081
		return; /* STGI will cause a vm exit */
5082
	}
5083 5084 5085 5086

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

J
Joerg Roedel 已提交
5087 5088 5089 5090
	/*
	 * Something prevents NMI from been injected. Single step over possible
	 * problem (IRET or exception injection or interrupt shadow)
	 */
5091
	svm->nmi_singlestep_guest_rflags = svm_get_rflags(vcpu);
J
Jan Kiszka 已提交
5092
	svm->nmi_singlestep = true;
5093
	svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);
5094 5095
}

5096 5097 5098 5099 5100
static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)
{
	return 0;
}

5101 5102
static void svm_flush_tlb(struct kvm_vcpu *vcpu)
{
5103 5104 5105 5106 5107 5108
	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--;
5109 5110
}

5111 5112 5113 5114
static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
{
}

5115 5116 5117 5118
static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

5119
	if (svm_nested_virtualize_tpr(vcpu))
5120 5121
		return;

5122
	if (!is_cr_intercept(svm, INTERCEPT_CR8_WRITE)) {
5123
		int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK;
5124
		kvm_set_cr8(vcpu, cr8);
5125 5126 5127
	}
}

5128 5129 5130 5131 5132
static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u64 cr8;

5133 5134
	if (svm_nested_virtualize_tpr(vcpu) ||
	    kvm_vcpu_apicv_active(vcpu))
5135 5136
		return;

5137 5138 5139 5140 5141
	cr8 = kvm_get_cr8(vcpu);
	svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
	svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK;
}

5142 5143 5144 5145 5146
static void svm_complete_interrupts(struct vcpu_svm *svm)
{
	u8 vector;
	int type;
	u32 exitintinfo = svm->vmcb->control.exit_int_info;
5147 5148 5149
	unsigned int3_injected = svm->int3_injected;

	svm->int3_injected = 0;
5150

5151 5152 5153 5154 5155 5156
	/*
	 * 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) {
5157
		svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK);
5158 5159
		kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
	}
5160

5161 5162 5163 5164 5165 5166 5167
	svm->vcpu.arch.nmi_injected = false;
	kvm_clear_exception_queue(&svm->vcpu);
	kvm_clear_interrupt_queue(&svm->vcpu);

	if (!(exitintinfo & SVM_EXITINTINFO_VALID))
		return;

5168 5169
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);

5170 5171 5172 5173 5174 5175 5176 5177
	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:
5178 5179 5180 5181 5182 5183 5184 5185 5186 5187 5188
		/*
		 * 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);
5189
			break;
5190
		}
5191 5192
		if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) {
			u32 err = svm->vmcb->control.exit_int_info_err;
5193
			kvm_requeue_exception_e(&svm->vcpu, vector, err);
5194 5195

		} else
5196
			kvm_requeue_exception(&svm->vcpu, vector);
5197 5198
		break;
	case SVM_EXITINTINFO_TYPE_INTR:
5199
		kvm_queue_interrupt(&svm->vcpu, vector, false);
5200 5201 5202 5203 5204 5205
		break;
	default:
		break;
	}
}

A
Avi Kivity 已提交
5206 5207 5208 5209 5210 5211 5212 5213 5214 5215 5216
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
5217
static void svm_vcpu_run(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
5218
{
5219
	struct vcpu_svm *svm = to_svm(vcpu);
5220

5221 5222 5223 5224
	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];

5225 5226 5227 5228 5229 5230 5231
	/*
	 * A vmexit emulation is required before the vcpu can be executed
	 * again.
	 */
	if (unlikely(svm->nested.exit_required))
		return;

5232 5233 5234 5235 5236 5237 5238 5239 5240 5241 5242 5243 5244 5245 5246 5247
	/*
	 * 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
5248
	pre_svm_run(svm);
A
Avi Kivity 已提交
5249

5250 5251
	sync_lapic_to_cr8(vcpu);

5252
	svm->vmcb->save.cr2 = vcpu->arch.cr2;
A
Avi Kivity 已提交
5253

5254 5255 5256
	clgi();

	local_irq_enable();
5257

A
Avi Kivity 已提交
5258
	asm volatile (
A
Avi Kivity 已提交
5259 5260 5261 5262 5263 5264 5265
		"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"
5266
#ifdef CONFIG_X86_64
R
Rusty Russell 已提交
5267 5268 5269 5270 5271 5272 5273 5274
		"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
5275 5276 5277
#endif

		/* Enter guest mode */
A
Avi Kivity 已提交
5278 5279
		"push %%" _ASM_AX " \n\t"
		"mov %c[vmcb](%[svm]), %%" _ASM_AX " \n\t"
5280 5281 5282
		__ex(SVM_VMLOAD) "\n\t"
		__ex(SVM_VMRUN) "\n\t"
		__ex(SVM_VMSAVE) "\n\t"
A
Avi Kivity 已提交
5283
		"pop %%" _ASM_AX " \n\t"
A
Avi Kivity 已提交
5284 5285

		/* Save guest registers, load host registers */
A
Avi Kivity 已提交
5286 5287 5288 5289 5290 5291
		"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"
5292
#ifdef CONFIG_X86_64
R
Rusty Russell 已提交
5293 5294 5295 5296 5297 5298 5299 5300
		"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"
A
Avi Kivity 已提交
5301
#endif
A
Avi Kivity 已提交
5302
		"pop %%" _ASM_BP
A
Avi Kivity 已提交
5303
		:
R
Rusty Russell 已提交
5304
		: [svm]"a"(svm),
A
Avi Kivity 已提交
5305
		  [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
5306 5307 5308 5309 5310 5311
		  [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]))
5312
#ifdef CONFIG_X86_64
5313 5314 5315 5316 5317 5318 5319 5320
		  , [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
5321
#endif
5322 5323
		: "cc", "memory"
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
5324
		, "rbx", "rcx", "rdx", "rsi", "rdi"
5325
		, "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15"
A
Avi Kivity 已提交
5326 5327
#else
		, "ebx", "ecx", "edx", "esi", "edi"
5328 5329
#endif
		);
A
Avi Kivity 已提交
5330

5331 5332 5333
#ifdef CONFIG_X86_64
	wrmsrl(MSR_GS_BASE, svm->host.gs_base);
#else
5334
	loadsegment(fs, svm->host.fs);
5335 5336 5337
#ifndef CONFIG_X86_32_LAZY_GS
	loadsegment(gs, svm->host.gs);
#endif
5338
#endif
A
Avi Kivity 已提交
5339 5340 5341

	reload_tss(vcpu);

5342 5343
	local_irq_disable();

5344 5345 5346 5347 5348
	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;

5349 5350 5351 5352 5353 5354 5355 5356 5357 5358
	if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
		kvm_before_handle_nmi(&svm->vcpu);

	stgi();

	/* Any pending NMI will happen here */

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

5359 5360
	sync_cr8_to_lapic(vcpu);

5361
	svm->next_rip = 0;
5362

5363 5364
	svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;

G
Gleb Natapov 已提交
5365 5366
	/* if exit due to PF check for async PF */
	if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR)
5367
		svm->vcpu.arch.apf.host_apf_reason = kvm_read_and_reset_pf_reason();
G
Gleb Natapov 已提交
5368

A
Avi Kivity 已提交
5369 5370 5371 5372
	if (npt_enabled) {
		vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR);
		vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR);
	}
5373 5374 5375 5376 5377 5378 5379 5380

	/*
	 * 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);
5381 5382

	mark_all_clean(svm->vmcb);
A
Avi Kivity 已提交
5383
}
5384
STACK_FRAME_NON_STANDARD(svm_vcpu_run);
A
Avi Kivity 已提交
5385 5386 5387

static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
{
5388 5389
	struct vcpu_svm *svm = to_svm(vcpu);

5390
	svm->vmcb->save.cr3 = __sme_set(root);
5391
	mark_dirty(svm->vmcb, VMCB_CR);
5392
	svm_flush_tlb(vcpu);
A
Avi Kivity 已提交
5393 5394
}

5395 5396 5397 5398
static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root)
{
	struct vcpu_svm *svm = to_svm(vcpu);

5399
	svm->vmcb->control.nested_cr3 = __sme_set(root);
5400
	mark_dirty(svm->vmcb, VMCB_NPT);
5401 5402

	/* Also sync guest cr3 here in case we live migrate */
5403
	svm->vmcb->save.cr3 = kvm_read_cr3(vcpu);
5404
	mark_dirty(svm->vmcb, VMCB_CR);
5405

5406
	svm_flush_tlb(vcpu);
5407 5408
}

A
Avi Kivity 已提交
5409 5410
static int is_disabled(void)
{
5411 5412 5413 5414 5415 5416
	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
5417 5418 5419
	return 0;
}

I
Ingo Molnar 已提交
5420 5421 5422 5423 5424 5425 5426 5427 5428 5429 5430
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
5431 5432 5433 5434 5435
static void svm_check_processor_compat(void *rtn)
{
	*(int *)rtn = 0;
}

5436 5437 5438 5439 5440
static bool svm_cpu_has_accelerated_tpr(void)
{
	return false;
}

5441 5442 5443 5444 5445
static bool svm_has_high_real_mode_segbase(void)
{
	return true;
}

5446 5447 5448 5449 5450
static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
{
	return 0;
}

5451 5452
static void svm_cpuid_update(struct kvm_vcpu *vcpu)
{
5453 5454 5455
	struct vcpu_svm *svm = to_svm(vcpu);

	/* Update nrips enabled cache */
5456
	svm->nrips_enabled = !!guest_cpuid_has(&svm->vcpu, X86_FEATURE_NRIPS);
5457 5458 5459 5460

	if (!kvm_vcpu_apicv_active(vcpu))
		return;

5461
	guest_cpuid_clear(vcpu, X86_FEATURE_X2APIC);
5462 5463
}

5464 5465
static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
{
5466
	switch (func) {
5467 5468 5469 5470
	case 0x1:
		if (avic)
			entry->ecx &= ~bit(X86_FEATURE_X2APIC);
		break;
5471 5472 5473 5474
	case 0x80000001:
		if (nested)
			entry->ecx |= (1 << 2); /* Set SVM bit */
		break;
5475 5476 5477 5478 5479
	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 */
5480 5481 5482 5483
		entry->edx = 0; /* Per default do not support any
				   additional features */

		/* Support next_rip if host supports it */
5484
		if (boot_cpu_has(X86_FEATURE_NRIPS))
5485
			entry->edx |= SVM_FEATURE_NRIP;
5486

5487 5488 5489 5490
		/* Support NPT for the guest if enabled */
		if (npt_enabled)
			entry->edx |= SVM_FEATURE_NPT;

5491
		break;
5492 5493 5494 5495 5496 5497
	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);

5498
	}
5499 5500
}

5501
static int svm_get_lpage_level(void)
5502
{
5503
	return PT_PDPE_LEVEL;
5504 5505
}

5506 5507
static bool svm_rdtscp_supported(void)
{
P
Paolo Bonzini 已提交
5508
	return boot_cpu_has(X86_FEATURE_RDTSCP);
5509 5510
}

5511 5512 5513 5514 5515
static bool svm_invpcid_supported(void)
{
	return false;
}

5516 5517 5518 5519 5520
static bool svm_mpx_supported(void)
{
	return false;
}

5521 5522 5523 5524 5525
static bool svm_xsaves_supported(void)
{
	return false;
}

5526 5527 5528 5529 5530
static bool svm_has_wbinvd_exit(void)
{
	return true;
}

5531
#define PRE_EX(exit)  { .exit_code = (exit), \
5532
			.stage = X86_ICPT_PRE_EXCEPT, }
5533
#define POST_EX(exit) { .exit_code = (exit), \
5534
			.stage = X86_ICPT_POST_EXCEPT, }
5535
#define POST_MEM(exit) { .exit_code = (exit), \
5536
			.stage = X86_ICPT_POST_MEMACCESS, }
5537

5538
static const struct __x86_intercept {
5539 5540 5541 5542 5543 5544 5545 5546
	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),
5547 5548
	[x86_intercept_dr_read]		= POST_EX(SVM_EXIT_READ_DR0),
	[x86_intercept_dr_write]	= POST_EX(SVM_EXIT_WRITE_DR0),
5549 5550 5551 5552 5553 5554 5555 5556
	[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),
5557 5558 5559 5560 5561 5562 5563 5564
	[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),
5565 5566 5567
	[x86_intercept_rdtscp]		= POST_EX(SVM_EXIT_RDTSCP),
	[x86_intercept_monitor]		= POST_MEM(SVM_EXIT_MONITOR),
	[x86_intercept_mwait]		= POST_EX(SVM_EXIT_MWAIT),
5568 5569 5570 5571 5572 5573 5574 5575 5576
	[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),
5577 5578 5579 5580 5581 5582 5583
	[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),
5584 5585 5586 5587
	[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),
5588 5589
};

5590
#undef PRE_EX
5591
#undef POST_EX
5592
#undef POST_MEM
5593

5594 5595 5596 5597
static int svm_check_intercept(struct kvm_vcpu *vcpu,
			       struct x86_instruction_info *info,
			       enum x86_intercept_stage stage)
{
5598 5599 5600 5601 5602 5603 5604 5605 5606 5607
	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];

5608
	if (stage != icpt_info.stage)
5609 5610 5611 5612 5613 5614 5615 5616 5617 5618 5619 5620 5621 5622
		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;

5623 5624
		if (icpt_info.exit_code != SVM_EXIT_WRITE_CR0 ||
		    info->intercept == x86_intercept_clts)
5625 5626 5627 5628 5629 5630 5631 5632 5633 5634 5635 5636 5637 5638 5639 5640 5641 5642 5643 5644 5645 5646 5647
			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;
	}
5648 5649 5650 5651
	case SVM_EXIT_READ_DR0:
	case SVM_EXIT_WRITE_DR0:
		icpt_info.exit_code += info->modrm_reg;
		break;
5652 5653 5654 5655 5656 5657
	case SVM_EXIT_MSR:
		if (info->intercept == x86_intercept_wrmsr)
			vmcb->control.exit_info_1 = 1;
		else
			vmcb->control.exit_info_1 = 0;
		break;
5658 5659 5660 5661 5662 5663 5664
	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;
5665
		break;
5666 5667 5668 5669 5670 5671
	case SVM_EXIT_IOIO: {
		u64 exit_info;
		u32 bytes;

		if (info->intercept == x86_intercept_in ||
		    info->intercept == x86_intercept_ins) {
5672 5673
			exit_info = ((info->src_val & 0xffff) << 16) |
				SVM_IOIO_TYPE_MASK;
5674
			bytes = info->dst_bytes;
5675
		} else {
5676
			exit_info = (info->dst_val & 0xffff) << 16;
5677
			bytes = info->src_bytes;
5678 5679 5680 5681 5682 5683 5684 5685 5686 5687 5688 5689 5690 5691 5692 5693 5694 5695 5696 5697
		}

		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;
	}
5698 5699 5700 5701
	default:
		break;
	}

5702 5703 5704
	/* TODO: Advertise NRIPS to guest hypervisor unconditionally */
	if (static_cpu_has(X86_FEATURE_NRIPS))
		vmcb->control.next_rip  = info->next_rip;
5705 5706 5707 5708 5709 5710 5711 5712
	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;
5713 5714
}

5715 5716 5717
static void svm_handle_external_intr(struct kvm_vcpu *vcpu)
{
	local_irq_enable();
P
Paolo Bonzini 已提交
5718 5719 5720 5721 5722 5723
	/*
	 * We must have an instruction with interrupts enabled, so
	 * the timer interrupt isn't delayed by the interrupt shadow.
	 */
	asm("nop");
	local_irq_disable();
5724 5725
}

5726 5727 5728 5729
static void svm_sched_in(struct kvm_vcpu *vcpu, int cpu)
{
}

5730 5731 5732 5733 5734 5735 5736 5737 5738
static inline void avic_post_state_restore(struct kvm_vcpu *vcpu)
{
	if (avic_handle_apic_id_update(vcpu) != 0)
		return;
	if (avic_handle_dfr_update(vcpu) != 0)
		return;
	avic_handle_ldr_update(vcpu);
}

5739 5740 5741 5742 5743 5744
static void svm_setup_mce(struct kvm_vcpu *vcpu)
{
	/* [63:9] are reserved. */
	vcpu->arch.mcg_cap &= 0x1ff;
}

5745 5746
static int svm_smi_allowed(struct kvm_vcpu *vcpu)
{
5747 5748 5749 5750 5751 5752 5753 5754 5755 5756 5757 5758 5759 5760
	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;
	}

5761 5762 5763
	return 1;
}

5764 5765
static int svm_pre_enter_smm(struct kvm_vcpu *vcpu, char *smstate)
{
5766 5767 5768 5769 5770 5771 5772 5773 5774 5775 5776 5777 5778 5779 5780 5781 5782
	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;
	}
5783 5784 5785 5786 5787
	return 0;
}

static int svm_pre_leave_smm(struct kvm_vcpu *vcpu, u64 smbase)
{
5788 5789 5790 5791 5792 5793 5794 5795 5796 5797 5798 5799 5800 5801 5802 5803 5804 5805 5806 5807 5808 5809 5810 5811
	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;
5812 5813
}

5814 5815 5816 5817 5818 5819 5820 5821 5822 5823 5824 5825 5826
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
5827 5828 5829 5830 5831 5832 5833 5834 5835 5836 5837 5838 5839 5840 5841 5842 5843 5844 5845 5846 5847 5848 5849 5850 5851 5852 5853 5854 5855 5856 5857
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)
{
	struct kvm_sev_info *sev = &kvm->arch.sev_info;
	int asid, ret;

	ret = -EBUSY;
	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;
5858
	INIT_LIST_HEAD(&sev->regions_list);
B
Brijesh Singh 已提交
5859 5860 5861 5862 5863 5864 5865 5866

	return 0;

e_free:
	__sev_asid_free(asid);
	return ret;
}

5867 5868 5869 5870 5871 5872 5873 5874 5875 5876 5877 5878 5879 5880 5881 5882 5883 5884 5885 5886 5887 5888 5889 5890 5891
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;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	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;
}

5892
static int __sev_issue_cmd(int fd, int id, void *data, int *error)
5893 5894 5895 5896 5897 5898 5899 5900 5901 5902 5903 5904 5905 5906
{
	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;
}

5907 5908 5909 5910 5911 5912 5913
static int sev_issue_cmd(struct kvm *kvm, int id, void *data, int *error)
{
	struct kvm_sev_info *sev = &kvm->arch.sev_info;

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

5914 5915 5916 5917 5918 5919 5920 5921 5922 5923 5924 5925 5926 5927 5928 5929 5930 5931 5932 5933 5934 5935 5936 5937 5938 5939 5940 5941 5942 5943 5944 5945 5946 5947 5948 5949 5950 5951 5952 5953 5954 5955 5956 5957 5958 5959 5960
static int sev_launch_start(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
	struct kvm_sev_info *sev = &kvm->arch.sev_info;
	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;

	start = kzalloc(sizeof(*start), GFP_KERNEL);
	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 */
5961
	ret = __sev_issue_cmd(argp->sev_fd, SEV_CMD_LAUNCH_START, start, error);
5962 5963 5964 5965 5966 5967 5968 5969 5970 5971 5972 5973 5974 5975 5976 5977 5978 5979 5980 5981 5982 5983 5984 5985 5986 5987 5988 5989
	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;
}

5990 5991 5992 5993 5994 5995 5996 5997 5998 5999 6000 6001 6002 6003 6004 6005 6006 6007 6008 6009 6010 6011 6012 6013 6014 6015 6016 6017 6018 6019 6020 6021 6022 6023 6024 6025 6026 6027 6028 6029 6030 6031 6032 6033 6034 6035 6036 6037 6038 6039 6040 6041 6042 6043 6044 6045 6046 6047 6048 6049 6050 6051 6052 6053 6054 6055 6056 6057 6058 6059 6060 6061 6062 6063 6064 6065 6066 6067 6068 6069 6070 6071 6072 6073 6074 6075 6076 6077 6078 6079 6080 6081 6082 6083 6084 6085 6086
static int get_num_contig_pages(int idx, struct page **inpages,
				unsigned long npages)
{
	unsigned long paddr, next_paddr;
	int i = idx + 1, pages = 1;

	/* 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)
{
	unsigned long vaddr, vaddr_end, next_vaddr, npages, size;
	struct kvm_sev_info *sev = &kvm->arch.sev_info;
	struct kvm_sev_launch_update_data params;
	struct sev_data_launch_update_data *data;
	struct page **inpages;
	int i, ret, pages;

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

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

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	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;
}

6087 6088 6089 6090 6091 6092 6093 6094 6095 6096 6097 6098 6099 6100 6101 6102 6103 6104 6105 6106 6107 6108 6109 6110 6111 6112 6113 6114 6115 6116 6117 6118 6119 6120 6121 6122 6123 6124 6125 6126 6127 6128 6129 6130 6131 6132 6133 6134 6135 6136 6137 6138 6139 6140 6141 6142 6143 6144 6145 6146 6147 6148 6149 6150 6151 6152 6153 6154 6155 6156 6157
static int sev_launch_measure(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
	struct kvm_sev_info *sev = &kvm->arch.sev_info;
	struct sev_data_launch_measure *data;
	struct kvm_sev_launch_measure params;
	void *blob = NULL;
	int ret;

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

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

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

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

	if (params.uaddr) {
		if (params.len > SEV_FW_BLOB_MAX_SIZE) {
			ret = -EINVAL;
			goto e_free;
		}

		if (!access_ok(VERIFY_WRITE, params.uaddr, params.len)) {
			ret = -EFAULT;
			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) {
		if (copy_to_user((void __user *)(uintptr_t)params.uaddr, blob, params.len))
			ret = -EFAULT;
	}

done:
	params.len = data->len;
	if (copy_to_user((void __user *)(uintptr_t)argp->data, &params, sizeof(params)))
		ret = -EFAULT;
e_free_blob:
	kfree(blob);
e_free:
	kfree(data);
	return ret;
}

6158 6159 6160 6161 6162 6163 6164 6165 6166 6167 6168 6169 6170 6171 6172 6173 6174 6175 6176 6177
static int sev_launch_finish(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
	struct kvm_sev_info *sev = &kvm->arch.sev_info;
	struct sev_data_launch_finish *data;
	int ret;

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

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

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

	kfree(data);
	return ret;
}

6178 6179 6180 6181 6182 6183 6184 6185 6186 6187 6188 6189 6190 6191 6192 6193 6194 6195 6196 6197 6198 6199 6200 6201 6202 6203 6204 6205 6206 6207
static int sev_guest_status(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
	struct kvm_sev_info *sev = &kvm->arch.sev_info;
	struct kvm_sev_guest_status params;
	struct sev_data_guest_status *data;
	int ret;

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

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	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;
}

6208 6209 6210 6211 6212 6213 6214 6215 6216 6217 6218 6219 6220 6221 6222 6223 6224 6225 6226 6227 6228 6229 6230 6231 6232 6233 6234 6235 6236 6237 6238 6239 6240 6241 6242 6243 6244 6245 6246 6247 6248 6249 6250 6251 6252 6253 6254 6255 6256 6257 6258 6259 6260 6261 6262 6263 6264 6265 6266 6267 6268 6269 6270 6271 6272 6273 6274 6275 6276 6277 6278 6279 6280 6281 6282 6283 6284
static int __sev_issue_dbg_cmd(struct kvm *kvm, unsigned long src,
			       unsigned long dst, int size,
			       int *error, bool enc)
{
	struct kvm_sev_info *sev = &kvm->arch.sev_info;
	struct sev_data_dbg *data;
	int ret;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	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;
}

6285 6286 6287 6288 6289 6290 6291 6292 6293 6294 6295 6296 6297 6298 6299 6300 6301 6302 6303 6304 6305 6306 6307 6308 6309 6310 6311 6312 6313 6314 6315 6316 6317 6318 6319 6320 6321 6322 6323 6324 6325 6326 6327 6328 6329 6330 6331 6332 6333 6334 6335 6336 6337 6338 6339 6340 6341 6342 6343 6344 6345 6346 6347 6348 6349 6350 6351 6352 6353 6354 6355 6356 6357 6358 6359 6360 6361
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;
}

6362 6363 6364 6365 6366 6367 6368 6369 6370 6371 6372 6373 6374 6375 6376 6377 6378 6379 6380 6381 6382 6383 6384 6385 6386 6387 6388 6389 6390 6391 6392 6393 6394 6395 6396 6397 6398 6399 6400 6401 6402 6403 6404 6405 6406 6407 6408 6409 6410 6411 6412 6413
static int sev_dbg_crypt(struct kvm *kvm, struct kvm_sev_cmd *argp, bool dec)
{
	unsigned long vaddr, vaddr_end, next_vaddr;
	unsigned long dst_vaddr, dst_vaddr_end;
	struct page **src_p, **dst_p;
	struct kvm_sev_dbg debug;
	unsigned long n;
	int ret, size;

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

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

	vaddr = debug.src_uaddr;
	size = debug.len;
	vaddr_end = vaddr + size;
	dst_vaddr = debug.dst_uaddr;
	dst_vaddr_end = dst_vaddr + size;

	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);

6414 6415 6416 6417 6418 6419 6420 6421 6422 6423 6424 6425 6426
		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);
6427 6428 6429 6430 6431 6432 6433 6434 6435 6436 6437 6438 6439 6440 6441

		sev_unpin_memory(kvm, src_p, 1);
		sev_unpin_memory(kvm, dst_p, 1);

		if (ret)
			goto err;

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

6442 6443 6444 6445 6446 6447 6448 6449 6450 6451 6452 6453 6454 6455 6456 6457 6458 6459 6460 6461 6462 6463 6464 6465 6466 6467 6468 6469 6470 6471 6472 6473 6474 6475 6476 6477 6478 6479 6480 6481 6482 6483 6484 6485 6486 6487 6488 6489 6490 6491 6492 6493 6494 6495 6496 6497 6498 6499 6500 6501 6502 6503 6504 6505 6506
static int sev_launch_secret(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
	struct kvm_sev_info *sev = &kvm->arch.sev_info;
	struct sev_data_launch_secret *data;
	struct kvm_sev_launch_secret params;
	struct page **pages;
	void *blob, *hdr;
	unsigned long n;
	int ret;

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

	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;
	}
	data->trans_address = __psp_pa(blob);
	data->trans_len = params.trans_len;

	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
6507 6508 6509 6510 6511 6512 6513 6514 6515 6516 6517 6518 6519 6520 6521 6522 6523
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;
6524 6525 6526
	case KVM_SEV_LAUNCH_START:
		r = sev_launch_start(kvm, &sev_cmd);
		break;
6527 6528 6529
	case KVM_SEV_LAUNCH_UPDATE_DATA:
		r = sev_launch_update_data(kvm, &sev_cmd);
		break;
6530 6531 6532
	case KVM_SEV_LAUNCH_MEASURE:
		r = sev_launch_measure(kvm, &sev_cmd);
		break;
6533 6534 6535
	case KVM_SEV_LAUNCH_FINISH:
		r = sev_launch_finish(kvm, &sev_cmd);
		break;
6536 6537 6538
	case KVM_SEV_GUEST_STATUS:
		r = sev_guest_status(kvm, &sev_cmd);
		break;
6539 6540 6541
	case KVM_SEV_DBG_DECRYPT:
		r = sev_dbg_crypt(kvm, &sev_cmd, true);
		break;
6542 6543 6544
	case KVM_SEV_DBG_ENCRYPT:
		r = sev_dbg_crypt(kvm, &sev_cmd, false);
		break;
6545 6546 6547
	case KVM_SEV_LAUNCH_SECRET:
		r = sev_launch_secret(kvm, &sev_cmd);
		break;
B
Brijesh Singh 已提交
6548 6549 6550 6551 6552 6553 6554 6555 6556 6557 6558 6559 6560
	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;
}

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 6588 6589 6590 6591 6592 6593 6594 6595 6596 6597 6598 6599 6600 6601 6602 6603 6604 6605 6606 6607 6608 6609 6610 6611 6612 6613 6614 6615 6616 6617 6618 6619 6620 6621 6622 6623 6624 6625 6626 6627 6628 6629 6630 6631 6632 6633 6634 6635 6636 6637 6638 6639 6640 6641 6642 6643 6644 6645 6646 6647 6648
static int svm_register_enc_region(struct kvm *kvm,
				   struct kvm_enc_region *range)
{
	struct kvm_sev_info *sev = &kvm->arch.sev_info;
	struct enc_region *region;
	int ret = 0;

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

	region = kzalloc(sizeof(*region), GFP_KERNEL);
	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)
{
	struct kvm_sev_info *sev = &kvm->arch.sev_info;
	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;
}

6649
static struct kvm_x86_ops svm_x86_ops __ro_after_init = {
A
Avi Kivity 已提交
6650 6651 6652 6653
	.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
6654
	.check_processor_compatibility = svm_check_processor_compat,
A
Avi Kivity 已提交
6655 6656
	.hardware_enable = svm_hardware_enable,
	.hardware_disable = svm_hardware_disable,
6657
	.cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr,
6658
	.cpu_has_high_real_mode_segbase = svm_has_high_real_mode_segbase,
A
Avi Kivity 已提交
6659 6660 6661

	.vcpu_create = svm_create_vcpu,
	.vcpu_free = svm_free_vcpu,
6662
	.vcpu_reset = svm_vcpu_reset,
A
Avi Kivity 已提交
6663

6664
	.vm_init = avic_vm_init,
B
Brijesh Singh 已提交
6665
	.vm_destroy = svm_vm_destroy,
6666

6667
	.prepare_guest_switch = svm_prepare_guest_switch,
A
Avi Kivity 已提交
6668 6669
	.vcpu_load = svm_vcpu_load,
	.vcpu_put = svm_vcpu_put,
6670 6671
	.vcpu_blocking = svm_vcpu_blocking,
	.vcpu_unblocking = svm_vcpu_unblocking,
A
Avi Kivity 已提交
6672

6673
	.update_bp_intercept = update_bp_intercept,
A
Avi Kivity 已提交
6674 6675 6676 6677 6678
	.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,
6679
	.get_cpl = svm_get_cpl,
6680
	.get_cs_db_l_bits = kvm_get_cs_db_l_bits,
6681
	.decache_cr0_guest_bits = svm_decache_cr0_guest_bits,
6682
	.decache_cr3 = svm_decache_cr3,
6683
	.decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
A
Avi Kivity 已提交
6684 6685 6686 6687 6688 6689 6690 6691
	.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
6692 6693
	.get_dr6 = svm_get_dr6,
	.set_dr6 = svm_set_dr6,
6694
	.set_dr7 = svm_set_dr7,
6695
	.sync_dirty_debug_regs = svm_sync_dirty_debug_regs,
A
Avi Kivity 已提交
6696
	.cache_reg = svm_cache_reg,
A
Avi Kivity 已提交
6697 6698
	.get_rflags = svm_get_rflags,
	.set_rflags = svm_set_rflags,
6699

A
Avi Kivity 已提交
6700 6701 6702
	.tlb_flush = svm_flush_tlb,

	.run = svm_vcpu_run,
6703
	.handle_exit = handle_exit,
A
Avi Kivity 已提交
6704
	.skip_emulated_instruction = skip_emulated_instruction,
6705 6706
	.set_interrupt_shadow = svm_set_interrupt_shadow,
	.get_interrupt_shadow = svm_get_interrupt_shadow,
I
Ingo Molnar 已提交
6707
	.patch_hypercall = svm_patch_hypercall,
E
Eddie Dong 已提交
6708
	.set_irq = svm_set_irq,
6709
	.set_nmi = svm_inject_nmi,
6710
	.queue_exception = svm_queue_exception,
A
Avi Kivity 已提交
6711
	.cancel_injection = svm_cancel_injection,
6712
	.interrupt_allowed = svm_interrupt_allowed,
6713
	.nmi_allowed = svm_nmi_allowed,
J
Jan Kiszka 已提交
6714 6715
	.get_nmi_mask = svm_get_nmi_mask,
	.set_nmi_mask = svm_set_nmi_mask,
6716 6717 6718
	.enable_nmi_window = enable_nmi_window,
	.enable_irq_window = enable_irq_window,
	.update_cr8_intercept = update_cr8_intercept,
6719
	.set_virtual_x2apic_mode = svm_set_virtual_x2apic_mode,
6720 6721
	.get_enable_apicv = svm_get_enable_apicv,
	.refresh_apicv_exec_ctrl = svm_refresh_apicv_exec_ctrl,
6722
	.load_eoi_exitmap = svm_load_eoi_exitmap,
6723 6724
	.hwapic_irr_update = svm_hwapic_irr_update,
	.hwapic_isr_update = svm_hwapic_isr_update,
6725
	.apicv_post_state_restore = avic_post_state_restore,
6726 6727

	.set_tss_addr = svm_set_tss_addr,
6728
	.get_tdp_level = get_npt_level,
6729
	.get_mt_mask = svm_get_mt_mask,
6730

6731 6732
	.get_exit_info = svm_get_exit_info,

6733
	.get_lpage_level = svm_get_lpage_level,
6734 6735

	.cpuid_update = svm_cpuid_update,
6736 6737

	.rdtscp_supported = svm_rdtscp_supported,
6738
	.invpcid_supported = svm_invpcid_supported,
6739
	.mpx_supported = svm_mpx_supported,
6740
	.xsaves_supported = svm_xsaves_supported,
6741 6742

	.set_supported_cpuid = svm_set_supported_cpuid,
6743 6744

	.has_wbinvd_exit = svm_has_wbinvd_exit,
6745 6746

	.write_tsc_offset = svm_write_tsc_offset,
6747 6748

	.set_tdp_cr3 = set_tdp_cr3,
6749 6750

	.check_intercept = svm_check_intercept,
6751
	.handle_external_intr = svm_handle_external_intr,
6752 6753

	.sched_in = svm_sched_in,
6754 6755

	.pmu_ops = &amd_pmu_ops,
6756
	.deliver_posted_interrupt = svm_deliver_avic_intr,
6757
	.update_pi_irte = svm_update_pi_irte,
6758
	.setup_mce = svm_setup_mce,
6759

6760
	.smi_allowed = svm_smi_allowed,
6761 6762
	.pre_enter_smm = svm_pre_enter_smm,
	.pre_leave_smm = svm_pre_leave_smm,
6763
	.enable_smi_window = enable_smi_window,
B
Brijesh Singh 已提交
6764 6765

	.mem_enc_op = svm_mem_enc_op,
6766 6767
	.mem_enc_reg_region = svm_register_enc_region,
	.mem_enc_unreg_region = svm_unregister_enc_region,
A
Avi Kivity 已提交
6768 6769 6770 6771
};

static int __init svm_init(void)
{
6772
	return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm),
6773
			__alignof__(struct vcpu_svm), THIS_MODULE);
A
Avi Kivity 已提交
6774 6775 6776 6777
}

static void __exit svm_exit(void)
{
6778
	kvm_exit();
A
Avi Kivity 已提交
6779 6780 6781 6782
}

module_init(svm_init)
module_exit(svm_exit)