svm.c 183.7 KB
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/*
 * Kernel-based Virtual Machine driver for Linux
 *
 * AMD SVM support
 *
 * Copyright (C) 2006 Qumranet, Inc.
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 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
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 *
 * Authors:
 *   Yaniv Kamay  <yaniv@qumranet.com>
 *   Avi Kivity   <avi@qumranet.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2.  See
 * the COPYING file in the top-level directory.
 *
 */
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#define pr_fmt(fmt) "SVM: " fmt

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#include <linux/kvm_host.h>

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

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

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

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#define IOPM_ALLOC_ORDER 2
#define MSRPM_ALLOC_ORDER 1

#define SEG_TYPE_LDT 2
#define SEG_TYPE_BUSY_TSS16 3

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#define SVM_FEATURE_NPT            (1 <<  0)
#define SVM_FEATURE_LBRV           (1 <<  1)
#define SVM_FEATURE_SVML           (1 <<  2)
#define SVM_FEATURE_NRIP           (1 <<  3)
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#define SVM_FEATURE_TSC_RATE       (1 <<  4)
#define SVM_FEATURE_VMCB_CLEAN     (1 <<  5)
#define SVM_FEATURE_FLUSH_ASID     (1 <<  6)
#define SVM_FEATURE_DECODE_ASSIST  (1 <<  7)
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#define SVM_FEATURE_PAUSE_FILTER   (1 << 10)
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#define SVM_AVIC_DOORBELL	0xc001011b

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

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#define DEBUGCTL_RESERVED_BITS (~(0x3fULL))

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

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

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

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

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

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static bool erratum_383_found __read_mostly;

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

#define NR_HOST_SAVE_USER_MSRS ARRAY_SIZE(host_save_user_msrs)

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

struct kvm_svm {
	struct kvm kvm;

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

	struct kvm_sev_info sev_info;
};

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struct kvm_vcpu;

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

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

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

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

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

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

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

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

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	u64 next_rip;

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

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	ulong nmi_iret_rip;

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	struct nested_state nested;
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	bool nmi_singlestep;
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	u64 nmi_singlestep_guest_rflags;
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	unsigned int3_injected;
	unsigned long int3_rip;
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	/* cached guest cpuid flags for faster access */
	bool nrips_enabled	: 1;
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	u32 ldr_reg;
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	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
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	{ .index = MSR_IA32_SPEC_CTRL,			.always = false },
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	{ .index = MSR_IA32_PRED_CMD,			.always = false },
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	{ .index = MSR_IA32_LASTBRANCHFROMIP,		.always = false },
	{ .index = MSR_IA32_LASTBRANCHTOIP,		.always = false },
	{ .index = MSR_IA32_LASTINTFROMIP,		.always = false },
	{ .index = MSR_IA32_LASTINTTOIP,		.always = false },
	{ .index = MSR_INVALID,				.always = false },
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};

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

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

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

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

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

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

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

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/* enable / disable AVIC */
static int avic;
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#ifdef CONFIG_X86_LOCAL_APIC
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module_param(avic, int, S_IRUGO);
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#endif
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/* enable/disable Virtual VMLOAD VMSAVE */
static int vls = true;
module_param(vls, int, 0444);

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	if (!entry)
		return false;

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

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

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	mark_dirty(svm->vmcb, VMCB_INTERCEPTS);

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

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

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

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

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

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

	recalc_intercepts(svm);
}

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

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

	recalc_intercepts(svm);
}

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

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

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

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	vmcb->control.intercept_dr = (1 << INTERCEPT_DR0_READ)
		| (1 << INTERCEPT_DR1_READ)
		| (1 << INTERCEPT_DR2_READ)
		| (1 << INTERCEPT_DR3_READ)
		| (1 << INTERCEPT_DR4_READ)
		| (1 << INTERCEPT_DR5_READ)
		| (1 << INTERCEPT_DR6_READ)
		| (1 << INTERCEPT_DR7_READ)
		| (1 << INTERCEPT_DR0_WRITE)
		| (1 << INTERCEPT_DR1_WRITE)
		| (1 << INTERCEPT_DR2_WRITE)
		| (1 << INTERCEPT_DR3_WRITE)
		| (1 << INTERCEPT_DR4_WRITE)
		| (1 << INTERCEPT_DR5_WRITE)
		| (1 << INTERCEPT_DR6_WRITE)
		| (1 << INTERCEPT_DR7_WRITE);
571 572 573 574

	recalc_intercepts(svm);
}

575
static inline void clr_dr_intercepts(struct vcpu_svm *svm)
576 577 578
{
	struct vmcb *vmcb = get_host_vmcb(svm);

579
	vmcb->control.intercept_dr = 0;
580 581 582 583

	recalc_intercepts(svm);
}

584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601
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);
}

602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619
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);
}

620 621 622 623 624
static inline bool vgif_enabled(struct vcpu_svm *svm)
{
	return !!(svm->vmcb->control.int_ctl & V_GIF_ENABLE_MASK);
}

625 626
static inline void enable_gif(struct vcpu_svm *svm)
{
627 628 629 630
	if (vgif_enabled(svm))
		svm->vmcb->control.int_ctl |= V_GIF_MASK;
	else
		svm->vcpu.arch.hflags |= HF_GIF_MASK;
631 632 633 634
}

static inline void disable_gif(struct vcpu_svm *svm)
{
635 636 637 638
	if (vgif_enabled(svm))
		svm->vmcb->control.int_ctl &= ~V_GIF_MASK;
	else
		svm->vcpu.arch.hflags &= ~HF_GIF_MASK;
639 640 641 642
}

static inline bool gif_set(struct vcpu_svm *svm)
{
643 644 645 646
	if (vgif_enabled(svm))
		return !!(svm->vmcb->control.int_ctl & V_GIF_MASK);
	else
		return !!(svm->vcpu.arch.hflags & HF_GIF_MASK);
647 648
}

649
static unsigned long iopm_base;
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Avi Kivity 已提交
650 651 652 653

struct kvm_ldttss_desc {
	u16 limit0;
	u16 base0;
J
Joerg Roedel 已提交
654 655
	unsigned base1:8, type:5, dpl:2, p:1;
	unsigned limit1:4, zero0:3, g:1, base2:8;
A
Avi Kivity 已提交
656 657 658 659 660 661 662
	u32 base3;
	u32 zero1;
} __attribute__((packed));

struct svm_cpu_data {
	int cpu;

A
Avi Kivity 已提交
663 664 665
	u64 asid_generation;
	u32 max_asid;
	u32 next_asid;
666
	u32 min_asid;
A
Avi Kivity 已提交
667 668 669
	struct kvm_ldttss_desc *tss_desc;

	struct page *save_area;
A
Ashok Raj 已提交
670
	struct vmcb *current_vmcb;
671 672 673

	/* index = sev_asid, value = vmcb pointer */
	struct vmcb **sev_vmcbs;
A
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674 675 676 677
};

static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);

678
static const u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
A
Avi Kivity 已提交
679

680
#define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges)
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681 682 683
#define MSRS_RANGE_SIZE 2048
#define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)

684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704
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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705 706 707 708
#define MAX_INST_SIZE 15

static inline void clgi(void)
{
709
	asm volatile (__ex("clgi"));
A
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710 711 712 713
}

static inline void stgi(void)
{
714
	asm volatile (__ex("stgi"));
A
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715 716 717 718
}

static inline void invlpga(unsigned long addr, u32 asid)
{
719
	asm volatile (__ex("invlpga %1, %0") : : "c"(asid), "a"(addr));
A
Avi Kivity 已提交
720 721
}

722
static int get_npt_level(struct kvm_vcpu *vcpu)
723 724
{
#ifdef CONFIG_X86_64
725
	return PT64_ROOT_4LEVEL;
726 727 728 729 730
#else
	return PT32E_ROOT_LEVEL;
#endif
}

A
Avi Kivity 已提交
731 732
static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
{
733
	vcpu->arch.efer = efer;
734
	if (!npt_enabled && !(efer & EFER_LMA))
735
		efer &= ~EFER_LME;
A
Avi Kivity 已提交
736

737
	to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME;
738
	mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
A
Avi Kivity 已提交
739 740 741 742 743 744 745 746
}

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

747
static u32 svm_get_interrupt_shadow(struct kvm_vcpu *vcpu)
748 749 750 751 752
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u32 ret = 0;

	if (svm->vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK)
753 754
		ret = KVM_X86_SHADOW_INT_STI | KVM_X86_SHADOW_INT_MOV_SS;
	return ret;
755 756 757 758 759 760 761 762 763 764 765 766 767
}

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

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

}

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Avi Kivity 已提交
768 769
static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
{
770 771
	struct vcpu_svm *svm = to_svm(vcpu);

772
	if (svm->vmcb->control.next_rip != 0) {
773
		WARN_ON_ONCE(!static_cpu_has(X86_FEATURE_NRIPS));
774
		svm->next_rip = svm->vmcb->control.next_rip;
775
	}
776

777
	if (!svm->next_rip) {
778
		if (kvm_emulate_instruction(vcpu, EMULTYPE_SKIP) !=
779 780
				EMULATE_DONE)
			printk(KERN_DEBUG "%s: NOP\n", __func__);
A
Avi Kivity 已提交
781 782
		return;
	}
783 784 785
	if (svm->next_rip - kvm_rip_read(vcpu) > MAX_INST_SIZE)
		printk(KERN_ERR "%s: ip 0x%lx next 0x%llx\n",
		       __func__, kvm_rip_read(vcpu), svm->next_rip);
A
Avi Kivity 已提交
786

787
	kvm_rip_write(vcpu, svm->next_rip);
788
	svm_set_interrupt_shadow(vcpu, 0);
A
Avi Kivity 已提交
789 790
}

791
static void svm_queue_exception(struct kvm_vcpu *vcpu)
J
Jan Kiszka 已提交
792 793
{
	struct vcpu_svm *svm = to_svm(vcpu);
794 795
	unsigned nr = vcpu->arch.exception.nr;
	bool has_error_code = vcpu->arch.exception.has_error_code;
796
	bool reinject = vcpu->arch.exception.injected;
797
	u32 error_code = vcpu->arch.exception.error_code;
J
Jan Kiszka 已提交
798

J
Joerg Roedel 已提交
799 800 801 802
	/*
	 * If we are within a nested VM we'd better #VMEXIT and let the guest
	 * handle the exception
	 */
803 804
	if (!reinject &&
	    nested_svm_check_exception(svm, nr, has_error_code, error_code))
J
Jan Kiszka 已提交
805 806
		return;

807 808
	kvm_deliver_exception_payload(&svm->vcpu);

809
	if (nr == BP_VECTOR && !static_cpu_has(X86_FEATURE_NRIPS)) {
810 811 812 813 814 815 816 817 818 819 820 821 822 823 824
		unsigned long rip, old_rip = kvm_rip_read(&svm->vcpu);

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

J
Jan Kiszka 已提交
825 826 827 828 829 830 831
	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;
}

832 833 834 835 836 837
static void svm_init_erratum_383(void)
{
	u32 low, high;
	int err;
	u64 val;

838
	if (!static_cpu_has_bug(X86_BUG_AMD_TLB_MMATCH))
839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855
		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;
}

856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876
static void svm_init_osvw(struct kvm_vcpu *vcpu)
{
	/*
	 * Guests should see errata 400 and 415 as fixed (assuming that
	 * HLT and IO instructions are intercepted).
	 */
	vcpu->arch.osvw.length = (osvw_len >= 3) ? (osvw_len) : 3;
	vcpu->arch.osvw.status = osvw_status & ~(6ULL);

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

A
Avi Kivity 已提交
877 878
static int has_svm(void)
{
879
	const char *msg;
A
Avi Kivity 已提交
880

881
	if (!cpu_has_svm(&msg)) {
J
Joe Perches 已提交
882
		printk(KERN_INFO "has_svm: %s\n", msg);
A
Avi Kivity 已提交
883 884 885 886 887 888
		return 0;
	}

	return 1;
}

889
static void svm_hardware_disable(void)
A
Avi Kivity 已提交
890
{
891 892 893 894
	/* Make sure we clean up behind us */
	if (static_cpu_has(X86_FEATURE_TSCRATEMSR))
		wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);

895
	cpu_svm_disable();
896 897

	amd_pmu_disable_virt();
A
Avi Kivity 已提交
898 899
}

900
static int svm_hardware_enable(void)
A
Avi Kivity 已提交
901 902
{

903
	struct svm_cpu_data *sd;
A
Avi Kivity 已提交
904 905 906 907
	uint64_t efer;
	struct desc_struct *gdt;
	int me = raw_smp_processor_id();

908 909 910 911
	rdmsrl(MSR_EFER, efer);
	if (efer & EFER_SVME)
		return -EBUSY;

A
Avi Kivity 已提交
912
	if (!has_svm()) {
913
		pr_err("%s: err EOPNOTSUPP on %d\n", __func__, me);
914
		return -EINVAL;
A
Avi Kivity 已提交
915
	}
916 917
	sd = per_cpu(svm_data, me);
	if (!sd) {
918
		pr_err("%s: svm_data is NULL on %d\n", __func__, me);
919
		return -EINVAL;
A
Avi Kivity 已提交
920 921
	}

922 923 924
	sd->asid_generation = 1;
	sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
	sd->next_asid = sd->max_asid + 1;
925
	sd->min_asid = max_sev_asid + 1;
A
Avi Kivity 已提交
926

927
	gdt = get_current_gdt_rw();
928
	sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
A
Avi Kivity 已提交
929

930
	wrmsrl(MSR_EFER, efer | EFER_SVME);
A
Avi Kivity 已提交
931

932
	wrmsrl(MSR_VM_HSAVE_PA, page_to_pfn(sd->save_area) << PAGE_SHIFT);
933

934 935
	if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) {
		wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);
936
		__this_cpu_write(current_tsc_ratio, TSC_RATIO_DEFAULT);
937 938
	}

939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968

	/*
	 * 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;

969 970
	svm_init_erratum_383();

971 972
	amd_pmu_enable_virt();

973
	return 0;
A
Avi Kivity 已提交
974 975
}

976 977
static void svm_cpu_uninit(int cpu)
{
978
	struct svm_cpu_data *sd = per_cpu(svm_data, raw_smp_processor_id());
979

980
	if (!sd)
981 982 983
		return;

	per_cpu(svm_data, raw_smp_processor_id()) = NULL;
984
	kfree(sd->sev_vmcbs);
985 986
	__free_page(sd->save_area);
	kfree(sd);
987 988
}

A
Avi Kivity 已提交
989 990
static int svm_cpu_init(int cpu)
{
991
	struct svm_cpu_data *sd;
A
Avi Kivity 已提交
992 993
	int r;

994 995
	sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
	if (!sd)
A
Avi Kivity 已提交
996
		return -ENOMEM;
997
	sd->cpu = cpu;
A
Avi Kivity 已提交
998
	r = -ENOMEM;
999
	sd->save_area = alloc_page(GFP_KERNEL);
1000
	if (!sd->save_area)
A
Avi Kivity 已提交
1001 1002
		goto err_1;

1003 1004
	if (svm_sev_enabled()) {
		r = -ENOMEM;
1005 1006 1007
		sd->sev_vmcbs = kmalloc_array(max_sev_asid + 1,
					      sizeof(void *),
					      GFP_KERNEL);
1008 1009 1010 1011
		if (!sd->sev_vmcbs)
			goto err_1;
	}

1012
	per_cpu(svm_data, cpu) = sd;
A
Avi Kivity 已提交
1013 1014 1015 1016

	return 0;

err_1:
1017
	kfree(sd);
A
Avi Kivity 已提交
1018 1019 1020 1021
	return r;

}

1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032
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;
}

1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051
static bool msr_write_intercepted(struct kvm_vcpu *vcpu, unsigned msr)
{
	u8 bit_write;
	unsigned long tmp;
	u32 offset;
	u32 *msrpm;

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

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

	BUG_ON(offset == MSR_INVALID);

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

1052 1053
static void set_msr_interception(u32 *msrpm, unsigned msr,
				 int read, int write)
A
Avi Kivity 已提交
1054
{
1055 1056 1057
	u8 bit_read, bit_write;
	unsigned long tmp;
	u32 offset;
A
Avi Kivity 已提交
1058

1059 1060 1061 1062 1063 1064
	/*
	 * If this warning triggers extend the direct_access_msrs list at the
	 * beginning of the file
	 */
	WARN_ON(!valid_msr_intercept(msr));

1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075
	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
1076 1077
}

1078
static void svm_vcpu_init_msrpm(u32 *msrpm)
A
Avi Kivity 已提交
1079 1080 1081
{
	int i;

1082 1083
	memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));

1084 1085 1086 1087 1088 1089
	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);
	}
1090 1091
}

1092 1093 1094 1095 1096 1097 1098 1099
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)
1100
			return;
1101 1102 1103 1104 1105 1106 1107 1108 1109

		/* 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
1110
	}
1111 1112 1113 1114 1115

	/*
	 * If this BUG triggers the msrpm_offsets table has an overflow. Just
	 * increase MSRPM_OFFSETS in this case.
	 */
1116
	BUG();
A
Avi Kivity 已提交
1117 1118
}

1119
static void init_msrpm_offsets(void)
1120
{
1121
	int i;
1122

1123 1124 1125 1126 1127 1128 1129 1130 1131 1132
	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);
	}
1133 1134
}

1135 1136 1137 1138
static void svm_enable_lbrv(struct vcpu_svm *svm)
{
	u32 *msrpm = svm->msrpm;

1139
	svm->vmcb->control.virt_ext |= LBR_CTL_ENABLE_MASK;
1140 1141 1142 1143 1144 1145 1146 1147 1148 1149
	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;

1150
	svm->vmcb->control.virt_ext &= ~LBR_CTL_ENABLE_MASK;
1151 1152 1153 1154 1155 1156
	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);
}

1157 1158 1159
static void disable_nmi_singlestep(struct vcpu_svm *svm)
{
	svm->nmi_singlestep = false;
1160

1161 1162 1163 1164 1165 1166 1167
	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;
	}
1168 1169
}

1170
/* Note:
1171
 * This hash table is used to map VM_ID to a struct kvm_svm,
1172 1173 1174 1175
 * when handling AMD IOMMU GALOG notification to schedule in
 * a particular vCPU.
 */
#define SVM_VM_DATA_HASH_BITS	8
1176
static DEFINE_HASHTABLE(svm_vm_data_hash, SVM_VM_DATA_HASH_BITS);
1177 1178
static u32 next_vm_id = 0;
static bool next_vm_id_wrapped = 0;
1179
static DEFINE_SPINLOCK(svm_vm_data_hash_lock);
1180 1181 1182 1183 1184 1185 1186 1187

/* 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;
1188
	struct kvm_svm *kvm_svm;
1189 1190 1191 1192 1193 1194 1195
	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);
1196 1197
	hash_for_each_possible(svm_vm_data_hash, kvm_svm, hnode, vm_id) {
		if (kvm_svm->avic_vm_id != vm_id)
1198
			continue;
1199
		vcpu = kvm_get_vcpu_by_id(&kvm_svm->kvm, vcpu_id);
1200 1201 1202 1203 1204 1205 1206 1207 1208
		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.
	 */
1209
	if (vcpu)
1210 1211 1212 1213 1214
		kvm_vcpu_wake_up(vcpu);

	return 0;
}

B
Brijesh Singh 已提交
1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225
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
1226 1227 1228 1229
	/* Minimum ASID value that should be used for SEV guest */
	min_sev_asid = cpuid_edx(0x8000001F);

	/* Initialize SEV ASID bitmap */
1230
	sev_asid_bitmap = bitmap_zalloc(max_sev_asid, GFP_KERNEL);
B
Brijesh Singh 已提交
1231 1232 1233
	if (!sev_asid_bitmap)
		return 1;

B
Brijesh Singh 已提交
1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255
	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;
}

1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291
static void grow_ple_window(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb_control_area *control = &svm->vmcb->control;
	int old = control->pause_filter_count;

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

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

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

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

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

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

A
Avi Kivity 已提交
1292 1293 1294 1295
static __init int svm_hardware_setup(void)
{
	int cpu;
	struct page *iopm_pages;
1296
	void *iopm_va;
A
Avi Kivity 已提交
1297 1298 1299 1300 1301 1302
	int r;

	iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);

	if (!iopm_pages)
		return -ENOMEM;
1303 1304 1305

	iopm_va = page_address(iopm_pages);
	memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
A
Avi Kivity 已提交
1306 1307
	iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;

1308 1309
	init_msrpm_offsets();

1310 1311 1312
	if (boot_cpu_has(X86_FEATURE_NX))
		kvm_enable_efer_bits(EFER_NX);

A
Alexander Graf 已提交
1313 1314 1315
	if (boot_cpu_has(X86_FEATURE_FXSR_OPT))
		kvm_enable_efer_bits(EFER_FFXSR);

1316 1317
	if (boot_cpu_has(X86_FEATURE_TSCRATEMSR)) {
		kvm_has_tsc_control = true;
1318 1319
		kvm_max_tsc_scaling_ratio = TSC_RATIO_MAX;
		kvm_tsc_scaling_ratio_frac_bits = 32;
1320 1321
	}

1322 1323 1324 1325 1326 1327 1328 1329
	/* Check for pause filtering support */
	if (!boot_cpu_has(X86_FEATURE_PAUSEFILTER)) {
		pause_filter_count = 0;
		pause_filter_thresh = 0;
	} else if (!boot_cpu_has(X86_FEATURE_PFTHRESHOLD)) {
		pause_filter_thresh = 0;
	}

1330 1331
	if (nested) {
		printk(KERN_INFO "kvm: Nested Virtualization enabled\n");
1332
		kvm_enable_efer_bits(EFER_SVME | EFER_LMSLE);
1333 1334
	}

B
Brijesh Singh 已提交
1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345
	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
1346
	for_each_possible_cpu(cpu) {
A
Avi Kivity 已提交
1347 1348
		r = svm_cpu_init(cpu);
		if (r)
1349
			goto err;
A
Avi Kivity 已提交
1350
	}
1351

1352
	if (!boot_cpu_has(X86_FEATURE_NPT))
1353 1354
		npt_enabled = false;

1355 1356 1357 1358 1359
	if (npt_enabled && !npt) {
		printk(KERN_INFO "kvm: Nested Paging disabled\n");
		npt_enabled = false;
	}

1360
	if (npt_enabled) {
1361
		printk(KERN_INFO "kvm: Nested Paging enabled\n");
1362
		kvm_enable_tdp();
1363 1364
	} else
		kvm_disable_tdp();
1365

1366 1367 1368
	if (avic) {
		if (!npt_enabled ||
		    !boot_cpu_has(X86_FEATURE_AVIC) ||
1369
		    !IS_ENABLED(CONFIG_X86_LOCAL_APIC)) {
1370
			avic = false;
1371
		} else {
1372
			pr_info("AVIC enabled\n");
1373 1374 1375

			amd_iommu_register_ga_log_notifier(&avic_ga_log_notifier);
		}
1376
	}
1377

1378 1379
	if (vls) {
		if (!npt_enabled ||
1380
		    !boot_cpu_has(X86_FEATURE_V_VMSAVE_VMLOAD) ||
1381 1382 1383 1384 1385 1386 1387
		    !IS_ENABLED(CONFIG_X86_64)) {
			vls = false;
		} else {
			pr_info("Virtual VMLOAD VMSAVE supported\n");
		}
	}

1388 1389 1390 1391 1392 1393 1394
	if (vgif) {
		if (!boot_cpu_has(X86_FEATURE_VGIF))
			vgif = false;
		else
			pr_info("Virtual GIF supported\n");
	}

A
Avi Kivity 已提交
1395 1396
	return 0;

1397
err:
A
Avi Kivity 已提交
1398 1399 1400 1401 1402 1403 1404
	__free_pages(iopm_pages, IOPM_ALLOC_ORDER);
	iopm_base = 0;
	return r;
}

static __exit void svm_hardware_unsetup(void)
{
1405 1406
	int cpu;

B
Brijesh Singh 已提交
1407
	if (svm_sev_enabled())
1408
		bitmap_free(sev_asid_bitmap);
B
Brijesh Singh 已提交
1409

Z
Zachary Amsden 已提交
1410
	for_each_possible_cpu(cpu)
1411 1412
		svm_cpu_uninit(cpu);

A
Avi Kivity 已提交
1413
	__free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
1414
	iopm_base = 0;
A
Avi Kivity 已提交
1415 1416 1417 1418 1419 1420
}

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
1421
		      SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
A
Avi Kivity 已提交
1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433
	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;
}

1434 1435 1436 1437 1438 1439 1440 1441 1442 1443
static u64 svm_read_l1_tsc_offset(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

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

	return vcpu->arch.tsc_offset;
}

1444
static u64 svm_write_l1_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
1445 1446 1447 1448
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u64 g_tsc_offset = 0;

1449
	if (is_guest_mode(vcpu)) {
1450
		/* Write L1's TSC offset.  */
1451 1452 1453
		g_tsc_offset = svm->vmcb->control.tsc_offset -
			       svm->nested.hsave->control.tsc_offset;
		svm->nested.hsave->control.tsc_offset = offset;
1454 1455 1456 1457 1458
	}

	trace_kvm_write_tsc_offset(vcpu->vcpu_id,
				   svm->vmcb->control.tsc_offset - g_tsc_offset,
				   offset);
1459 1460

	svm->vmcb->control.tsc_offset = offset + g_tsc_offset;
1461 1462

	mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
1463
	return svm->vmcb->control.tsc_offset;
1464 1465
}

1466 1467 1468
static void avic_init_vmcb(struct vcpu_svm *svm)
{
	struct vmcb *vmcb = svm->vmcb;
1469
	struct kvm_svm *kvm_svm = to_kvm_svm(svm->vcpu.kvm);
1470
	phys_addr_t bpa = __sme_set(page_to_phys(svm->avic_backing_page));
1471 1472
	phys_addr_t lpa = __sme_set(page_to_phys(kvm_svm->avic_logical_id_table_page));
	phys_addr_t ppa = __sme_set(page_to_phys(kvm_svm->avic_physical_id_table_page));
1473 1474 1475 1476 1477 1478 1479 1480

	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
1481
static void init_vmcb(struct vcpu_svm *svm)
A
Avi Kivity 已提交
1482
{
1483 1484
	struct vmcb_control_area *control = &svm->vmcb->control;
	struct vmcb_save_area *save = &svm->vmcb->save;
A
Avi Kivity 已提交
1485

1486
	svm->vcpu.arch.hflags = 0;
1487

1488 1489 1490 1491 1492 1493
	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);
1494 1495
	if (!kvm_vcpu_apicv_active(&svm->vcpu))
		set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
A
Avi Kivity 已提交
1496

1497
	set_dr_intercepts(svm);
A
Avi Kivity 已提交
1498

1499 1500 1501
	set_exception_intercept(svm, PF_VECTOR);
	set_exception_intercept(svm, UD_VECTOR);
	set_exception_intercept(svm, MC_VECTOR);
1502
	set_exception_intercept(svm, AC_VECTOR);
1503
	set_exception_intercept(svm, DB_VECTOR);
1504 1505 1506 1507 1508 1509 1510 1511
	/*
	 * Guest access to VMware backdoor ports could legitimately
	 * trigger #GP because of TSS I/O permission bitmap.
	 * We intercept those #GP and allow access to them anyway
	 * as VMware does.
	 */
	if (enable_vmware_backdoor)
		set_exception_intercept(svm, GP_VECTOR);
A
Avi Kivity 已提交
1512

1513 1514 1515 1516
	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
1517
	set_intercept(svm, INTERCEPT_RDPMC);
1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533
	set_intercept(svm, INTERCEPT_CPUID);
	set_intercept(svm, INTERCEPT_INVD);
	set_intercept(svm, INTERCEPT_INVLPG);
	set_intercept(svm, INTERCEPT_INVLPGA);
	set_intercept(svm, INTERCEPT_IOIO_PROT);
	set_intercept(svm, INTERCEPT_MSR_PROT);
	set_intercept(svm, INTERCEPT_TASK_SWITCH);
	set_intercept(svm, INTERCEPT_SHUTDOWN);
	set_intercept(svm, INTERCEPT_VMRUN);
	set_intercept(svm, INTERCEPT_VMMCALL);
	set_intercept(svm, INTERCEPT_VMLOAD);
	set_intercept(svm, INTERCEPT_VMSAVE);
	set_intercept(svm, INTERCEPT_STGI);
	set_intercept(svm, INTERCEPT_CLGI);
	set_intercept(svm, INTERCEPT_SKINIT);
	set_intercept(svm, INTERCEPT_WBINVD);
J
Joerg Roedel 已提交
1534
	set_intercept(svm, INTERCEPT_XSETBV);
B
Brijesh Singh 已提交
1535
	set_intercept(svm, INTERCEPT_RSM);
A
Avi Kivity 已提交
1536

1537
	if (!kvm_mwait_in_guest(svm->vcpu.kvm)) {
1538 1539 1540 1541
		set_intercept(svm, INTERCEPT_MONITOR);
		set_intercept(svm, INTERCEPT_MWAIT);
	}

1542 1543 1544
	if (!kvm_hlt_in_guest(svm->vcpu.kvm))
		set_intercept(svm, INTERCEPT_HLT);

1545 1546
	control->iopm_base_pa = __sme_set(iopm_base);
	control->msrpm_base_pa = __sme_set(__pa(svm->msrpm));
A
Avi Kivity 已提交
1547 1548 1549 1550 1551 1552 1553 1554 1555
	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;
1556
	save->cs.base = 0xffff0000;
A
Avi Kivity 已提交
1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567
	/* 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
1568
	svm_set_efer(&svm->vcpu, 0);
M
Mike Day 已提交
1569
	save->dr6 = 0xffff0ff0;
1570
	kvm_set_rflags(&svm->vcpu, 2);
A
Avi Kivity 已提交
1571
	save->rip = 0x0000fff0;
1572
	svm->vcpu.arch.regs[VCPU_REGS_RIP] = save->rip;
A
Avi Kivity 已提交
1573

J
Joerg Roedel 已提交
1574
	/*
1575
	 * svm_set_cr0() sets PG and WP and clears NW and CD on save->cr0.
1576
	 * It also updates the guest-visible cr0 value.
A
Avi Kivity 已提交
1577
	 */
1578
	svm_set_cr0(&svm->vcpu, X86_CR0_NW | X86_CR0_CD | X86_CR0_ET);
1579
	kvm_mmu_reset_context(&svm->vcpu);
1580

1581
	save->cr4 = X86_CR4_PAE;
A
Avi Kivity 已提交
1582
	/* rdx = ?? */
1583 1584 1585

	if (npt_enabled) {
		/* Setup VMCB for Nested Paging */
1586
		control->nested_ctl |= SVM_NESTED_CTL_NP_ENABLE;
1587
		clr_intercept(svm, INTERCEPT_INVLPG);
1588
		clr_exception_intercept(svm, PF_VECTOR);
1589 1590
		clr_cr_intercept(svm, INTERCEPT_CR3_READ);
		clr_cr_intercept(svm, INTERCEPT_CR3_WRITE);
1591
		save->g_pat = svm->vcpu.arch.pat;
1592 1593 1594
		save->cr3 = 0;
		save->cr4 = 0;
	}
1595
	svm->asid_generation = 0;
1596

1597
	svm->nested.vmcb = 0;
1598 1599
	svm->vcpu.arch.hflags = 0;

1600 1601 1602 1603
	if (pause_filter_count) {
		control->pause_filter_count = pause_filter_count;
		if (pause_filter_thresh)
			control->pause_filter_thresh = pause_filter_thresh;
1604
		set_intercept(svm, INTERCEPT_PAUSE);
1605 1606
	} else {
		clr_intercept(svm, INTERCEPT_PAUSE);
1607 1608
	}

1609
	if (kvm_vcpu_apicv_active(&svm->vcpu))
1610 1611
		avic_init_vmcb(svm);

1612 1613 1614 1615 1616 1617 1618 1619 1620 1621
	/*
	 * 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;
	}

1622 1623 1624 1625 1626 1627
	if (vgif) {
		clr_intercept(svm, INTERCEPT_STGI);
		clr_intercept(svm, INTERCEPT_CLGI);
		svm->vmcb->control.int_ctl |= V_GIF_ENABLE_MASK;
	}

1628
	if (sev_guest(svm->vcpu.kvm)) {
B
Brijesh Singh 已提交
1629
		svm->vmcb->control.nested_ctl |= SVM_NESTED_CTL_SEV_ENABLE;
1630 1631
		clr_exception_intercept(svm, UD_VECTOR);
	}
B
Brijesh Singh 已提交
1632

1633 1634
	mark_all_dirty(svm->vmcb);

1635
	enable_gif(svm);
1636 1637 1638

}

1639 1640
static u64 *avic_get_physical_id_entry(struct kvm_vcpu *vcpu,
				       unsigned int index)
1641 1642
{
	u64 *avic_physical_id_table;
1643
	struct kvm_svm *kvm_svm = to_kvm_svm(vcpu->kvm);
1644 1645 1646 1647

	if (index >= AVIC_MAX_PHYSICAL_ID_COUNT)
		return NULL;

1648
	avic_physical_id_table = page_address(kvm_svm->avic_physical_id_table_page);
1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663

	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;
1664
	int ret = 0;
1665

1666
	mutex_lock(&kvm->slots_lock);
1667
	if (kvm->arch.apic_access_page_done)
1668
		goto out;
1669

1670 1671 1672 1673
	ret = __x86_set_memory_region(kvm,
				      APIC_ACCESS_PAGE_PRIVATE_MEMSLOT,
				      APIC_DEFAULT_PHYS_BASE,
				      PAGE_SIZE);
1674
	if (ret)
1675
		goto out;
1676 1677

	kvm->arch.apic_access_page_done = true;
1678 1679 1680
out:
	mutex_unlock(&kvm->slots_lock);
	return ret;
1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707
}

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);
1708 1709 1710
	new_entry = __sme_set((page_to_phys(svm->avic_backing_page) &
			      AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK) |
			      AVIC_PHYSICAL_ID_ENTRY_VALID_MASK);
1711 1712 1713 1714 1715 1716 1717
	WRITE_ONCE(*entry, new_entry);

	svm->avic_physical_id_cache = entry;

	return 0;
}

B
Brijesh Singh 已提交
1718 1719
static void __sev_asid_free(int asid)
{
1720 1721
	struct svm_cpu_data *sd;
	int cpu, pos;
B
Brijesh Singh 已提交
1722 1723 1724

	pos = asid - 1;
	clear_bit(pos, sev_asid_bitmap);
1725 1726 1727 1728 1729

	for_each_possible_cpu(cpu) {
		sd = per_cpu(svm_data, cpu);
		sd->sev_vmcbs[pos] = NULL;
	}
B
Brijesh Singh 已提交
1730 1731 1732 1733
}

static void sev_asid_free(struct kvm *kvm)
{
1734
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
B
Brijesh Singh 已提交
1735 1736 1737 1738

	__sev_asid_free(sev->asid);
}

1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769
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);
}

1770 1771 1772 1773
static struct page **sev_pin_memory(struct kvm *kvm, unsigned long uaddr,
				    unsigned long ulen, unsigned long *n,
				    int write)
{
1774
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1775 1776 1777
	unsigned long npages, npinned, size;
	unsigned long locked, lock_limit;
	struct page **pages;
1778 1779 1780 1781
	unsigned long first, last;

	if (ulen == 0 || uaddr + ulen < uaddr)
		return NULL;
1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827

	/* 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)
{
1828
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849

	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);
	}
}

1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865
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);
}

1866 1867
static struct kvm *svm_vm_alloc(void)
{
1868
	struct kvm_svm *kvm_svm = vzalloc(sizeof(struct kvm_svm));
1869
	return &kvm_svm->kvm;
1870 1871 1872 1873
}

static void svm_vm_free(struct kvm *kvm)
{
1874
	vfree(to_kvm_svm(kvm));
1875 1876
}

B
Brijesh Singh 已提交
1877 1878
static void sev_vm_destroy(struct kvm *kvm)
{
1879
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1880 1881
	struct list_head *head = &sev->regions_list;
	struct list_head *pos, *q;
1882

B
Brijesh Singh 已提交
1883 1884 1885
	if (!sev_guest(kvm))
		return;

1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900
	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);

1901
	sev_unbind_asid(kvm, sev->handle);
B
Brijesh Singh 已提交
1902 1903 1904
	sev_asid_free(kvm);
}

1905 1906
static void avic_vm_destroy(struct kvm *kvm)
{
1907
	unsigned long flags;
1908
	struct kvm_svm *kvm_svm = to_kvm_svm(kvm);
1909

1910 1911 1912
	if (!avic)
		return;

1913 1914 1915 1916
	if (kvm_svm->avic_logical_id_table_page)
		__free_page(kvm_svm->avic_logical_id_table_page);
	if (kvm_svm->avic_physical_id_table_page)
		__free_page(kvm_svm->avic_physical_id_table_page);
1917 1918

	spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
1919
	hash_del(&kvm_svm->hnode);
1920
	spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);
1921 1922
}

B
Brijesh Singh 已提交
1923 1924 1925 1926 1927 1928
static void svm_vm_destroy(struct kvm *kvm)
{
	avic_vm_destroy(kvm);
	sev_vm_destroy(kvm);
}

1929 1930
static int avic_vm_init(struct kvm *kvm)
{
1931
	unsigned long flags;
1932
	int err = -ENOMEM;
1933 1934
	struct kvm_svm *kvm_svm = to_kvm_svm(kvm);
	struct kvm_svm *k2;
1935 1936
	struct page *p_page;
	struct page *l_page;
1937
	u32 vm_id;
1938 1939 1940 1941 1942 1943 1944 1945 1946

	if (!avic)
		return 0;

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

1947
	kvm_svm->avic_physical_id_table_page = p_page;
1948 1949 1950 1951 1952 1953 1954
	clear_page(page_address(p_page));

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

1955
	kvm_svm->avic_logical_id_table_page = l_page;
1956 1957
	clear_page(page_address(l_page));

1958
	spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
1959 1960 1961 1962 1963 1964 1965 1966
 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) {
1967 1968
		hash_for_each_possible(svm_vm_data_hash, k2, hnode, vm_id) {
			if (k2->avic_vm_id == vm_id)
1969 1970 1971
				goto again;
		}
	}
1972 1973
	kvm_svm->avic_vm_id = vm_id;
	hash_add(svm_vm_data_hash, &kvm_svm->hnode, kvm_svm->avic_vm_id);
1974 1975
	spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);

1976 1977 1978 1979 1980
	return 0;

free_avic:
	avic_vm_destroy(kvm);
	return err;
A
Avi Kivity 已提交
1981 1982
}

1983 1984
static inline int
avic_update_iommu_vcpu_affinity(struct kvm_vcpu *vcpu, int cpu, bool r)
1985
{
1986 1987 1988
	int ret = 0;
	unsigned long flags;
	struct amd_svm_iommu_ir *ir;
1989 1990
	struct vcpu_svm *svm = to_svm(vcpu);

1991 1992
	if (!kvm_arch_has_assigned_device(vcpu->kvm))
		return 0;
1993

1994 1995 1996 1997 1998
	/*
	 * 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);
1999

2000 2001
	if (list_empty(&svm->ir_list))
		goto out;
2002

2003 2004 2005 2006 2007 2008 2009 2010
	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;
2011 2012 2013 2014 2015 2016
}

static void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
	u64 entry;
	/* ID = 0xff (broadcast), ID > 0xff (reserved) */
2017
	int h_physical_id = kvm_cpu_get_apicid(cpu);
2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036
	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);
2037 2038
	avic_update_iommu_vcpu_affinity(vcpu, h_physical_id,
					svm->avic_is_running);
2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049
}

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));
2050 2051 2052
	if (entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK)
		avic_update_iommu_vcpu_affinity(vcpu, -1, 0);

2053 2054
	entry &= ~AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK;
	WRITE_ONCE(*(svm->avic_physical_id_cache), entry);
A
Avi Kivity 已提交
2055 2056
}

2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070
/**
 * 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);
}

2071
static void svm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event)
2072 2073
{
	struct vcpu_svm *svm = to_svm(vcpu);
2074 2075
	u32 dummy;
	u32 eax = 1;
2076

2077
	vcpu->arch.microcode_version = 0x01000065;
2078
	svm->spec_ctrl = 0;
2079
	svm->virt_spec_ctrl = 0;
2080

2081 2082 2083 2084 2085 2086
	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
2087
	init_vmcb(svm);
A
Avi Kivity 已提交
2088

2089
	kvm_cpuid(vcpu, &eax, &dummy, &dummy, &dummy, true);
2090
	kvm_register_write(vcpu, VCPU_REGS_RDX, eax);
2091 2092 2093

	if (kvm_vcpu_apicv_active(vcpu) && !init_event)
		avic_update_vapic_bar(svm, APIC_DEFAULT_PHYS_BASE);
2094 2095
}

2096 2097 2098 2099
static int avic_init_vcpu(struct vcpu_svm *svm)
{
	int ret;

2100
	if (!kvm_vcpu_apicv_active(&svm->vcpu))
2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112
		return 0;

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

	INIT_LIST_HEAD(&svm->ir_list);
	spin_lock_init(&svm->ir_list_lock);

	return ret;
}

R
Rusty Russell 已提交
2113
static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
A
Avi Kivity 已提交
2114
{
2115
	struct vcpu_svm *svm;
A
Avi Kivity 已提交
2116
	struct page *page;
2117
	struct page *msrpm_pages;
A
Alexander Graf 已提交
2118
	struct page *hsave_page;
A
Alexander Graf 已提交
2119
	struct page *nested_msrpm_pages;
R
Rusty Russell 已提交
2120
	int err;
A
Avi Kivity 已提交
2121

2122
	svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
R
Rusty Russell 已提交
2123 2124 2125 2126 2127
	if (!svm) {
		err = -ENOMEM;
		goto out;
	}

2128 2129 2130 2131 2132 2133 2134
	svm->vcpu.arch.guest_fpu = kmem_cache_zalloc(x86_fpu_cache, GFP_KERNEL);
	if (!svm->vcpu.arch.guest_fpu) {
		printk(KERN_ERR "kvm: failed to allocate vcpu's fpu\n");
		err = -ENOMEM;
		goto free_partial_svm;
	}

R
Rusty Russell 已提交
2135 2136 2137 2138
	err = kvm_vcpu_init(&svm->vcpu, kvm, id);
	if (err)
		goto free_svm;

2139
	err = -ENOMEM;
A
Avi Kivity 已提交
2140
	page = alloc_page(GFP_KERNEL);
2141
	if (!page)
R
Rusty Russell 已提交
2142
		goto uninit;
A
Avi Kivity 已提交
2143

2144 2145
	msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
	if (!msrpm_pages)
2146
		goto free_page1;
A
Alexander Graf 已提交
2147 2148 2149

	nested_msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
	if (!nested_msrpm_pages)
2150
		goto free_page2;
2151

A
Alexander Graf 已提交
2152 2153
	hsave_page = alloc_page(GFP_KERNEL);
	if (!hsave_page)
2154 2155
		goto free_page3;

2156 2157 2158
	err = avic_init_vcpu(svm);
	if (err)
		goto free_page4;
2159

2160 2161 2162 2163 2164
	/* 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;

2165
	svm->nested.hsave = page_address(hsave_page);
A
Alexander Graf 已提交
2166

2167 2168 2169
	svm->msrpm = page_address(msrpm_pages);
	svm_vcpu_init_msrpm(svm->msrpm);

2170
	svm->nested.msrpm = page_address(nested_msrpm_pages);
2171
	svm_vcpu_init_msrpm(svm->nested.msrpm);
A
Alexander Graf 已提交
2172

2173 2174
	svm->vmcb = page_address(page);
	clear_page(svm->vmcb);
2175
	svm->vmcb_pa = __sme_set(page_to_pfn(page) << PAGE_SHIFT);
2176
	svm->asid_generation = 0;
P
Paolo Bonzini 已提交
2177
	init_vmcb(svm);
A
Avi Kivity 已提交
2178

2179 2180
	svm_init_osvw(&svm->vcpu);

R
Rusty Russell 已提交
2181
	return &svm->vcpu;
2182

2183 2184
free_page4:
	__free_page(hsave_page);
2185 2186 2187 2188 2189 2190
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
2191 2192 2193
uninit:
	kvm_vcpu_uninit(&svm->vcpu);
free_svm:
2194 2195
	kmem_cache_free(x86_fpu_cache, svm->vcpu.arch.guest_fpu);
free_partial_svm:
2196
	kmem_cache_free(kvm_vcpu_cache, svm);
R
Rusty Russell 已提交
2197 2198
out:
	return ERR_PTR(err);
A
Avi Kivity 已提交
2199 2200
}

2201 2202 2203 2204 2205 2206 2207 2208
static void svm_clear_current_vmcb(struct vmcb *vmcb)
{
	int i;

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

A
Avi Kivity 已提交
2209 2210
static void svm_free_vcpu(struct kvm_vcpu *vcpu)
{
2211 2212
	struct vcpu_svm *svm = to_svm(vcpu);

2213 2214 2215 2216 2217 2218 2219
	/*
	 * The vmcb page can be recycled, causing a false negative in
	 * svm_vcpu_load(). So, ensure that no logical CPU has this
	 * vmcb page recorded as its current vmcb.
	 */
	svm_clear_current_vmcb(svm->vmcb);

2220
	__free_page(pfn_to_page(__sme_clr(svm->vmcb_pa) >> PAGE_SHIFT));
2221
	__free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER);
2222 2223
	__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
2224
	kvm_vcpu_uninit(vcpu);
2225
	kmem_cache_free(x86_fpu_cache, svm->vcpu.arch.guest_fpu);
2226
	kmem_cache_free(kvm_vcpu_cache, svm);
A
Avi Kivity 已提交
2227 2228
}

2229
static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
A
Avi Kivity 已提交
2230
{
2231
	struct vcpu_svm *svm = to_svm(vcpu);
A
Ashok Raj 已提交
2232
	struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
2233
	int i;
2234 2235

	if (unlikely(cpu != vcpu->cpu)) {
2236
		svm->asid_generation = 0;
2237
		mark_all_dirty(svm->vmcb);
2238
	}
2239

2240 2241 2242
#ifdef CONFIG_X86_64
	rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host.gs_base);
#endif
2243 2244 2245 2246
	savesegment(fs, svm->host.fs);
	savesegment(gs, svm->host.gs);
	svm->host.ldt = kvm_read_ldt();

2247
	for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
2248
		rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
2249

2250 2251 2252 2253 2254 2255
	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);
		}
2256
	}
P
Paolo Bonzini 已提交
2257 2258 2259
	/* This assumes that the kernel never uses MSR_TSC_AUX */
	if (static_cpu_has(X86_FEATURE_RDTSCP))
		wrmsrl(MSR_TSC_AUX, svm->tsc_aux);
2260

A
Ashok Raj 已提交
2261 2262 2263 2264
	if (sd->current_vmcb != svm->vmcb) {
		sd->current_vmcb = svm->vmcb;
		indirect_branch_prediction_barrier();
	}
2265
	avic_vcpu_load(vcpu, cpu);
A
Avi Kivity 已提交
2266 2267 2268 2269
}

static void svm_vcpu_put(struct kvm_vcpu *vcpu)
{
2270
	struct vcpu_svm *svm = to_svm(vcpu);
2271 2272
	int i;

2273 2274
	avic_vcpu_put(vcpu);

2275
	++vcpu->stat.host_state_reload;
2276 2277 2278
	kvm_load_ldt(svm->host.ldt);
#ifdef CONFIG_X86_64
	loadsegment(fs, svm->host.fs);
2279
	wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gsbase);
2280
	load_gs_index(svm->host.gs);
2281
#else
2282
#ifdef CONFIG_X86_32_LAZY_GS
2283
	loadsegment(gs, svm->host.gs);
2284
#endif
2285
#endif
2286
	for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
2287
		wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
A
Avi Kivity 已提交
2288 2289
}

2290 2291 2292 2293 2294 2295 2296 2297 2298 2299
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
2300 2301
static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
{
2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312
	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
2313 2314 2315 2316
}

static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
{
2317 2318 2319
	if (to_svm(vcpu)->nmi_singlestep)
		rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);

P
Paolo Bonzini 已提交
2320
       /*
A
Andrea Gelmini 已提交
2321
        * Any change of EFLAGS.VM is accompanied by a reload of SS
P
Paolo Bonzini 已提交
2322 2323 2324
        * (caused by either a task switch or an inter-privilege IRET),
        * so we do not need to update the CPL here.
        */
2325
	to_svm(vcpu)->vmcb->save.rflags = rflags;
A
Avi Kivity 已提交
2326 2327
}

A
Avi Kivity 已提交
2328 2329 2330 2331 2332
static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
{
	switch (reg) {
	case VCPU_EXREG_PDPTR:
		BUG_ON(!npt_enabled);
2333
		load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu));
A
Avi Kivity 已提交
2334 2335 2336 2337 2338 2339
		break;
	default:
		BUG();
	}
}

2340 2341
static void svm_set_vintr(struct vcpu_svm *svm)
{
2342
	set_intercept(svm, INTERCEPT_VINTR);
2343 2344 2345 2346
}

static void svm_clear_vintr(struct vcpu_svm *svm)
{
2347
	clr_intercept(svm, INTERCEPT_VINTR);
2348 2349
}

A
Avi Kivity 已提交
2350 2351
static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
{
2352
	struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
A
Avi Kivity 已提交
2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364

	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
2365
	return NULL;
A
Avi Kivity 已提交
2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389
}

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;
2390 2391 2392 2393 2394 2395 2396 2397 2398 2399

	/*
	 * 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;
2400

J
Joerg Roedel 已提交
2401 2402
	/*
	 * AMD's VMCB does not have an explicit unusable field, so emulate it
2403 2404
	 * for cross vendor migration purposes by "not present"
	 */
2405
	var->unusable = !var->present;
2406

2407 2408 2409 2410 2411 2412
	switch (seg) {
	case VCPU_SREG_TR:
		/*
		 * Work around a bug where the busy flag in the tr selector
		 * isn't exposed
		 */
2413
		var->type |= 0x2;
2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428
		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;
2429
	case VCPU_SREG_SS:
J
Joerg Roedel 已提交
2430 2431
		/*
		 * On AMD CPUs sometimes the DB bit in the segment
2432 2433 2434 2435 2436 2437
		 * 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;
2438
		/* This is symmetric with svm_set_segment() */
J
Jan Kiszka 已提交
2439
		var->dpl = to_svm(vcpu)->vmcb->save.cpl;
2440
		break;
2441
	}
A
Avi Kivity 已提交
2442 2443
}

2444 2445 2446 2447 2448 2449 2450
static int svm_get_cpl(struct kvm_vcpu *vcpu)
{
	struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;

	return save->cpl;
}

2451
static void svm_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2452
{
2453 2454
	struct vcpu_svm *svm = to_svm(vcpu);

2455 2456
	dt->size = svm->vmcb->save.idtr.limit;
	dt->address = svm->vmcb->save.idtr.base;
A
Avi Kivity 已提交
2457 2458
}

2459
static void svm_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2460
{
2461 2462
	struct vcpu_svm *svm = to_svm(vcpu);

2463 2464
	svm->vmcb->save.idtr.limit = dt->size;
	svm->vmcb->save.idtr.base = dt->address ;
2465
	mark_dirty(svm->vmcb, VMCB_DT);
A
Avi Kivity 已提交
2466 2467
}

2468
static void svm_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2469
{
2470 2471
	struct vcpu_svm *svm = to_svm(vcpu);

2472 2473
	dt->size = svm->vmcb->save.gdtr.limit;
	dt->address = svm->vmcb->save.gdtr.base;
A
Avi Kivity 已提交
2474 2475
}

2476
static void svm_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2477
{
2478 2479
	struct vcpu_svm *svm = to_svm(vcpu);

2480 2481
	svm->vmcb->save.gdtr.limit = dt->size;
	svm->vmcb->save.gdtr.base = dt->address ;
2482
	mark_dirty(svm->vmcb, VMCB_DT);
A
Avi Kivity 已提交
2483 2484
}

2485 2486 2487 2488
static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
{
}

2489 2490 2491 2492
static void svm_decache_cr3(struct kvm_vcpu *vcpu)
{
}

2493
static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
2494 2495 2496
{
}

A
Avi Kivity 已提交
2497 2498 2499 2500 2501
static void update_cr0_intercept(struct vcpu_svm *svm)
{
	ulong gcr0 = svm->vcpu.arch.cr0;
	u64 *hcr0 = &svm->vmcb->save.cr0;

2502 2503
	*hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK)
		| (gcr0 & SVM_CR0_SELECTIVE_MASK);
A
Avi Kivity 已提交
2504

2505
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
2506

2507
	if (gcr0 == *hcr0) {
2508 2509
		clr_cr_intercept(svm, INTERCEPT_CR0_READ);
		clr_cr_intercept(svm, INTERCEPT_CR0_WRITE);
A
Avi Kivity 已提交
2510
	} else {
2511 2512
		set_cr_intercept(svm, INTERCEPT_CR0_READ);
		set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
A
Avi Kivity 已提交
2513 2514 2515
	}
}

A
Avi Kivity 已提交
2516 2517
static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
{
2518 2519
	struct vcpu_svm *svm = to_svm(vcpu);

2520
#ifdef CONFIG_X86_64
2521
	if (vcpu->arch.efer & EFER_LME) {
2522
		if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
2523
			vcpu->arch.efer |= EFER_LMA;
2524
			svm->vmcb->save.efer |= EFER_LMA | EFER_LME;
A
Avi Kivity 已提交
2525 2526
		}

M
Mike Day 已提交
2527
		if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) {
2528
			vcpu->arch.efer &= ~EFER_LMA;
2529
			svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME);
A
Avi Kivity 已提交
2530 2531 2532
		}
	}
#endif
2533
	vcpu->arch.cr0 = cr0;
2534 2535 2536

	if (!npt_enabled)
		cr0 |= X86_CR0_PG | X86_CR0_WP;
2537

2538 2539 2540 2541 2542 2543 2544
	/*
	 * 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);
2545
	svm->vmcb->save.cr0 = cr0;
2546
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
2547
	update_cr0_intercept(svm);
A
Avi Kivity 已提交
2548 2549
}

2550
static int svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
A
Avi Kivity 已提交
2551
{
2552
	unsigned long host_cr4_mce = cr4_read_shadow() & X86_CR4_MCE;
2553 2554
	unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4;

2555 2556 2557
	if (cr4 & X86_CR4_VMXE)
		return 1;

2558
	if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE))
2559
		svm_flush_tlb(vcpu, true);
2560

2561 2562 2563
	vcpu->arch.cr4 = cr4;
	if (!npt_enabled)
		cr4 |= X86_CR4_PAE;
2564
	cr4 |= host_cr4_mce;
2565
	to_svm(vcpu)->vmcb->save.cr4 = cr4;
2566
	mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
2567
	return 0;
A
Avi Kivity 已提交
2568 2569 2570 2571 2572
}

static void svm_set_segment(struct kvm_vcpu *vcpu,
			    struct kvm_segment *var, int seg)
{
2573
	struct vcpu_svm *svm = to_svm(vcpu);
A
Avi Kivity 已提交
2574 2575 2576 2577 2578
	struct vmcb_seg *s = svm_seg(vcpu, seg);

	s->base = var->base;
	s->limit = var->limit;
	s->selector = var->selector;
2579 2580 2581 2582 2583 2584 2585 2586
	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
2587 2588 2589 2590 2591 2592 2593 2594

	/*
	 * 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)
2595 2596
		/* This is symmetric with svm_get_segment() */
		svm->vmcb->save.cpl = (var->dpl & 3);
A
Avi Kivity 已提交
2597

2598
	mark_dirty(svm->vmcb, VMCB_SEG);
A
Avi Kivity 已提交
2599 2600
}

2601
static void update_bp_intercept(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
2602
{
J
Jan Kiszka 已提交
2603 2604
	struct vcpu_svm *svm = to_svm(vcpu);

2605
	clr_exception_intercept(svm, BP_VECTOR);
2606

J
Jan Kiszka 已提交
2607 2608
	if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) {
		if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
2609
			set_exception_intercept(svm, BP_VECTOR);
J
Jan Kiszka 已提交
2610 2611
	} else
		vcpu->guest_debug = 0;
2612 2613
}

2614
static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd)
A
Avi Kivity 已提交
2615
{
2616 2617
	if (sd->next_asid > sd->max_asid) {
		++sd->asid_generation;
2618
		sd->next_asid = sd->min_asid;
2619
		svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
A
Avi Kivity 已提交
2620 2621
	}

2622 2623
	svm->asid_generation = sd->asid_generation;
	svm->vmcb->control.asid = sd->next_asid++;
2624 2625

	mark_dirty(svm->vmcb, VMCB_ASID);
A
Avi Kivity 已提交
2626 2627
}

J
Jan Kiszka 已提交
2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640
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);
}

2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655
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);
}

2656
static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value)
A
Avi Kivity 已提交
2657
{
2658 2659
	struct vcpu_svm *svm = to_svm(vcpu);

2660
	svm->vmcb->save.dr7 = value;
2661
	mark_dirty(svm->vmcb, VMCB_DR);
A
Avi Kivity 已提交
2662 2663
}

A
Avi Kivity 已提交
2664
static int pf_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2665
{
2666
	u64 fault_address = __sme_clr(svm->vmcb->control.exit_info_2);
2667
	u64 error_code = svm->vmcb->control.exit_info_1;
A
Avi Kivity 已提交
2668

2669
	return kvm_handle_page_fault(&svm->vcpu, error_code, fault_address,
2670 2671
			static_cpu_has(X86_FEATURE_DECODEASSISTS) ?
			svm->vmcb->control.insn_bytes : NULL,
2672 2673 2674 2675 2676
			svm->vmcb->control.insn_len);
}

static int npf_interception(struct vcpu_svm *svm)
{
2677
	u64 fault_address = __sme_clr(svm->vmcb->control.exit_info_2);
2678 2679 2680 2681
	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,
2682 2683
			static_cpu_has(X86_FEATURE_DECODEASSISTS) ?
			svm->vmcb->control.insn_bytes : NULL,
2684
			svm->vmcb->control.insn_len);
A
Avi Kivity 已提交
2685 2686
}

A
Avi Kivity 已提交
2687
static int db_interception(struct vcpu_svm *svm)
J
Jan Kiszka 已提交
2688
{
A
Avi Kivity 已提交
2689 2690
	struct kvm_run *kvm_run = svm->vcpu.run;

J
Jan Kiszka 已提交
2691
	if (!(svm->vcpu.guest_debug &
2692
	      (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) &&
J
Jan Kiszka 已提交
2693
		!svm->nmi_singlestep) {
J
Jan Kiszka 已提交
2694 2695 2696
		kvm_queue_exception(&svm->vcpu, DB_VECTOR);
		return 1;
	}
2697

J
Jan Kiszka 已提交
2698
	if (svm->nmi_singlestep) {
2699
		disable_nmi_singlestep(svm);
2700 2701 2702
	}

	if (svm->vcpu.guest_debug &
J
Joerg Roedel 已提交
2703
	    (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) {
2704 2705 2706 2707 2708 2709 2710 2711
		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
2712 2713
}

A
Avi Kivity 已提交
2714
static int bp_interception(struct vcpu_svm *svm)
J
Jan Kiszka 已提交
2715
{
A
Avi Kivity 已提交
2716 2717
	struct kvm_run *kvm_run = svm->vcpu.run;

J
Jan Kiszka 已提交
2718 2719 2720 2721 2722 2723
	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
2724
static int ud_interception(struct vcpu_svm *svm)
2725
{
W
Wanpeng Li 已提交
2726
	return handle_ud(&svm->vcpu);
2727 2728
}

2729 2730 2731 2732 2733 2734
static int ac_interception(struct vcpu_svm *svm)
{
	kvm_queue_exception_e(&svm->vcpu, AC_VECTOR, 0);
	return 1;
}

2735 2736 2737 2738 2739 2740 2741 2742
static int gp_interception(struct vcpu_svm *svm)
{
	struct kvm_vcpu *vcpu = &svm->vcpu;
	u32 error_code = svm->vmcb->control.exit_info_1;
	int er;

	WARN_ON_ONCE(!enable_vmware_backdoor);

2743
	er = kvm_emulate_instruction(vcpu,
2744 2745 2746 2747 2748 2749 2750 2751
		EMULTYPE_VMWARE | EMULTYPE_NO_UD_ON_FAIL);
	if (er == EMULATE_USER_EXIT)
		return 0;
	else if (er != EMULATE_DONE)
		kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
	return 1;
}

2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790
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;
}

2791
static void svm_handle_mce(struct vcpu_svm *svm)
2792
{
2793 2794 2795 2796 2797 2798 2799
	if (is_erratum_383()) {
		/*
		 * Erratum 383 triggered. Guest state is corrupt so kill the
		 * guest.
		 */
		pr_err("KVM: Guest triggered AMD Erratum 383\n");

2800
		kvm_make_request(KVM_REQ_TRIPLE_FAULT, &svm->vcpu);
2801 2802 2803 2804

		return;
	}

2805 2806 2807 2808 2809 2810 2811 2812
	/*
	 * 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 */

2813 2814 2815 2816 2817
	return;
}

static int mc_interception(struct vcpu_svm *svm)
{
2818 2819 2820
	return 1;
}

A
Avi Kivity 已提交
2821
static int shutdown_interception(struct vcpu_svm *svm)
2822
{
A
Avi Kivity 已提交
2823 2824
	struct kvm_run *kvm_run = svm->vcpu.run;

2825 2826 2827 2828
	/*
	 * VMCB is undefined after a SHUTDOWN intercept
	 * so reinitialize it.
	 */
2829
	clear_page(svm->vmcb);
P
Paolo Bonzini 已提交
2830
	init_vmcb(svm);
2831 2832 2833 2834 2835

	kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
	return 0;
}

A
Avi Kivity 已提交
2836
static int io_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2837
{
2838
	struct kvm_vcpu *vcpu = &svm->vcpu;
M
Mike Day 已提交
2839
	u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */
2840
	int size, in, string;
2841
	unsigned port;
A
Avi Kivity 已提交
2842

R
Rusty Russell 已提交
2843
	++svm->vcpu.stat.io_exits;
2844
	string = (io_info & SVM_IOIO_STR_MASK) != 0;
2845
	in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
2846
	if (string)
2847
		return kvm_emulate_instruction(vcpu, 0) == EMULATE_DONE;
2848

2849 2850
	port = io_info >> 16;
	size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
2851 2852
	svm->next_rip = svm->vmcb->control.exit_info_2;

2853
	return kvm_fast_pio(&svm->vcpu, size, port, in);
A
Avi Kivity 已提交
2854 2855
}

A
Avi Kivity 已提交
2856
static int nmi_interception(struct vcpu_svm *svm)
2857 2858 2859 2860
{
	return 1;
}

A
Avi Kivity 已提交
2861
static int intr_interception(struct vcpu_svm *svm)
2862 2863 2864 2865 2866
{
	++svm->vcpu.stat.irq_exits;
	return 1;
}

A
Avi Kivity 已提交
2867
static int nop_on_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2868 2869 2870 2871
{
	return 1;
}

A
Avi Kivity 已提交
2872
static int halt_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2873
{
2874
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 1;
R
Rusty Russell 已提交
2875
	return kvm_emulate_halt(&svm->vcpu);
A
Avi Kivity 已提交
2876 2877
}

A
Avi Kivity 已提交
2878
static int vmmcall_interception(struct vcpu_svm *svm)
2879
{
2880
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2881
	return kvm_emulate_hypercall(&svm->vcpu);
2882 2883
}

2884 2885 2886 2887 2888 2889 2890
static unsigned long nested_svm_get_tdp_cr3(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	return svm->nested.nested_cr3;
}

2891 2892 2893 2894 2895 2896 2897
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;

2898
	ret = kvm_vcpu_read_guest_page(vcpu, gpa_to_gfn(__sme_clr(cr3)), &pdpte,
2899
				       offset_in_page(cr3) + index * 8, 8);
2900 2901 2902 2903 2904
	if (ret)
		return 0;
	return pdpte;
}

2905 2906 2907 2908 2909
static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu,
				   unsigned long root)
{
	struct vcpu_svm *svm = to_svm(vcpu);

2910
	svm->vmcb->control.nested_cr3 = __sme_set(root);
2911
	mark_dirty(svm->vmcb, VMCB_NPT);
2912 2913
}

2914 2915
static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu,
				       struct x86_exception *fault)
2916 2917 2918
{
	struct vcpu_svm *svm = to_svm(vcpu);

2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938
	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;
2939 2940 2941 2942

	nested_svm_vmexit(svm);
}

2943
static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu)
2944
{
2945
	WARN_ON(mmu_is_nested(vcpu));
2946 2947

	vcpu->arch.mmu = &vcpu->arch.guest_mmu;
2948
	kvm_init_shadow_mmu(vcpu);
2949 2950 2951 2952 2953 2954
	vcpu->arch.mmu->set_cr3           = nested_svm_set_tdp_cr3;
	vcpu->arch.mmu->get_cr3           = nested_svm_get_tdp_cr3;
	vcpu->arch.mmu->get_pdptr         = nested_svm_get_tdp_pdptr;
	vcpu->arch.mmu->inject_page_fault = nested_svm_inject_npf_exit;
	vcpu->arch.mmu->shadow_root_level = get_npt_level(vcpu);
	reset_shadow_zero_bits_mask(vcpu, vcpu->arch.mmu);
2955 2956 2957 2958 2959
	vcpu->arch.walk_mmu              = &vcpu->arch.nested_mmu;
}

static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu)
{
2960
	vcpu->arch.mmu = &vcpu->arch.root_mmu;
2961
	vcpu->arch.walk_mmu = &vcpu->arch.root_mmu;
2962 2963
}

2964 2965
static int nested_svm_check_permissions(struct vcpu_svm *svm)
{
2966 2967
	if (!(svm->vcpu.arch.efer & EFER_SVME) ||
	    !is_paging(&svm->vcpu)) {
2968 2969 2970 2971 2972 2973 2974 2975 2976
		kvm_queue_exception(&svm->vcpu, UD_VECTOR);
		return 1;
	}

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

2977
	return 0;
2978 2979
}

2980 2981 2982
static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
				      bool has_error_code, u32 error_code)
{
2983 2984
	int vmexit;

2985
	if (!is_guest_mode(&svm->vcpu))
2986
		return 0;
2987

2988 2989 2990 2991
	vmexit = nested_svm_intercept(svm);
	if (vmexit != NESTED_EXIT_DONE)
		return 0;

2992 2993 2994
	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;
2995 2996

	/*
2997 2998
	 * EXITINFO2 is undefined for all exception intercepts other
	 * than #PF.
2999
	 */
3000 3001
	if (svm->vcpu.arch.exception.nested_apf)
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.apf.nested_apf_token;
3002 3003
	else if (svm->vcpu.arch.exception.has_payload)
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.exception.payload;
3004 3005
	else
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2;
3006

3007
	svm->nested.exit_required = true;
3008
	return vmexit;
3009 3010
}

3011 3012
/* This function returns true if it is save to enable the irq window */
static inline bool nested_svm_intr(struct vcpu_svm *svm)
3013
{
3014
	if (!is_guest_mode(&svm->vcpu))
3015
		return true;
3016

3017
	if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
3018
		return true;
3019

3020
	if (!(svm->vcpu.arch.hflags & HF_HIF_MASK))
3021
		return false;
3022

3023 3024 3025 3026 3027 3028 3029 3030
	/*
	 * 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;

3031 3032 3033
	svm->vmcb->control.exit_code   = SVM_EXIT_INTR;
	svm->vmcb->control.exit_info_1 = 0;
	svm->vmcb->control.exit_info_2 = 0;
3034

3035 3036 3037
	if (svm->nested.intercept & 1ULL) {
		/*
		 * The #vmexit can't be emulated here directly because this
G
Guo Chao 已提交
3038
		 * code path runs with irqs and preemption disabled. A
3039 3040 3041 3042
		 * #vmexit emulation might sleep. Only signal request for
		 * the #vmexit here.
		 */
		svm->nested.exit_required = true;
3043
		trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip);
3044
		return false;
3045 3046
	}

3047
	return true;
3048 3049
}

3050 3051 3052
/* This function returns true if it is save to enable the nmi window */
static inline bool nested_svm_nmi(struct vcpu_svm *svm)
{
3053
	if (!is_guest_mode(&svm->vcpu))
3054 3055 3056 3057 3058 3059 3060 3061 3062
		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;
3063 3064
}

3065
static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, struct page **_page)
3066 3067 3068
{
	struct page *page;

3069 3070
	might_sleep();

3071
	page = kvm_vcpu_gfn_to_page(&svm->vcpu, gpa >> PAGE_SHIFT);
3072 3073 3074
	if (is_error_page(page))
		goto error;

3075 3076 3077
	*_page = page;

	return kmap(page);
3078 3079 3080 3081 3082 3083 3084

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

	return NULL;
}

3085
static void nested_svm_unmap(struct page *page)
3086
{
3087
	kunmap(page);
3088 3089 3090
	kvm_release_page_dirty(page);
}

3091 3092
static int nested_svm_intercept_ioio(struct vcpu_svm *svm)
{
3093 3094 3095
	unsigned port, size, iopm_len;
	u16 val, mask;
	u8 start_bit;
3096
	u64 gpa;
3097

3098 3099
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_IOIO_PROT)))
		return NESTED_EXIT_HOST;
3100

3101
	port = svm->vmcb->control.exit_info_1 >> 16;
3102 3103
	size = (svm->vmcb->control.exit_info_1 & SVM_IOIO_SIZE_MASK) >>
		SVM_IOIO_SIZE_SHIFT;
3104
	gpa  = svm->nested.vmcb_iopm + (port / 8);
3105 3106 3107 3108
	start_bit = port % 8;
	iopm_len = (start_bit + size > 8) ? 2 : 1;
	mask = (0xf >> (4 - size)) << start_bit;
	val = 0;
3109

3110
	if (kvm_vcpu_read_guest(&svm->vcpu, gpa, &val, iopm_len))
3111
		return NESTED_EXIT_DONE;
3112

3113
	return (val & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
3114 3115
}

3116
static int nested_svm_exit_handled_msr(struct vcpu_svm *svm)
3117
{
3118 3119
	u32 offset, msr, value;
	int write, mask;
3120

3121
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
3122
		return NESTED_EXIT_HOST;
3123

3124 3125 3126 3127
	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);
3128

3129 3130
	if (offset == MSR_INVALID)
		return NESTED_EXIT_DONE;
3131

3132 3133
	/* Offset is in 32 bit units but need in 8 bit units */
	offset *= 4;
3134

3135
	if (kvm_vcpu_read_guest(&svm->vcpu, svm->nested.vmcb_msrpm + offset, &value, 4))
3136
		return NESTED_EXIT_DONE;
3137

3138
	return (value & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
3139 3140
}

3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165
/* 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;
}

3166
static int nested_svm_exit_special(struct vcpu_svm *svm)
3167 3168
{
	u32 exit_code = svm->vmcb->control.exit_code;
3169

3170 3171 3172
	switch (exit_code) {
	case SVM_EXIT_INTR:
	case SVM_EXIT_NMI:
3173
	case SVM_EXIT_EXCP_BASE + MC_VECTOR:
3174 3175
		return NESTED_EXIT_HOST;
	case SVM_EXIT_NPF:
J
Joerg Roedel 已提交
3176
		/* For now we are always handling NPFs when using them */
3177 3178 3179 3180
		if (npt_enabled)
			return NESTED_EXIT_HOST;
		break;
	case SVM_EXIT_EXCP_BASE + PF_VECTOR:
G
Gleb Natapov 已提交
3181
		/* When we're shadowing, trap PFs, but not async PF */
3182
		if (!npt_enabled && svm->vcpu.arch.apf.host_apf_reason == 0)
3183 3184 3185 3186
			return NESTED_EXIT_HOST;
		break;
	default:
		break;
3187 3188
	}

3189 3190 3191 3192 3193 3194
	return NESTED_EXIT_CONTINUE;
}

/*
 * If this function returns true, this #vmexit was already handled
 */
3195
static int nested_svm_intercept(struct vcpu_svm *svm)
3196 3197 3198 3199
{
	u32 exit_code = svm->vmcb->control.exit_code;
	int vmexit = NESTED_EXIT_HOST;

3200
	switch (exit_code) {
3201
	case SVM_EXIT_MSR:
3202
		vmexit = nested_svm_exit_handled_msr(svm);
3203
		break;
3204 3205 3206
	case SVM_EXIT_IOIO:
		vmexit = nested_svm_intercept_ioio(svm);
		break;
3207 3208 3209
	case SVM_EXIT_READ_CR0 ... SVM_EXIT_WRITE_CR8: {
		u32 bit = 1U << (exit_code - SVM_EXIT_READ_CR0);
		if (svm->nested.intercept_cr & bit)
3210
			vmexit = NESTED_EXIT_DONE;
3211 3212
		break;
	}
3213 3214 3215
	case SVM_EXIT_READ_DR0 ... SVM_EXIT_WRITE_DR7: {
		u32 bit = 1U << (exit_code - SVM_EXIT_READ_DR0);
		if (svm->nested.intercept_dr & bit)
3216
			vmexit = NESTED_EXIT_DONE;
3217 3218 3219 3220
		break;
	}
	case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: {
		u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE);
3221 3222 3223 3224 3225 3226
		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
3227 3228
		/* async page fault always cause vmexit */
		else if ((exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) &&
3229
			 svm->vcpu.arch.exception.nested_apf != 0)
G
Gleb Natapov 已提交
3230
			vmexit = NESTED_EXIT_DONE;
3231 3232
		break;
	}
3233 3234 3235 3236
	case SVM_EXIT_ERR: {
		vmexit = NESTED_EXIT_DONE;
		break;
	}
3237 3238
	default: {
		u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR);
J
Joerg Roedel 已提交
3239
		if (svm->nested.intercept & exit_bits)
3240
			vmexit = NESTED_EXIT_DONE;
3241 3242 3243
	}
	}

3244 3245 3246 3247 3248 3249 3250 3251 3252 3253
	return vmexit;
}

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

	vmexit = nested_svm_intercept(svm);

	if (vmexit == NESTED_EXIT_DONE)
3254 3255 3256
		nested_svm_vmexit(svm);

	return vmexit;
3257 3258
}

3259 3260 3261 3262 3263
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;

3264
	dst->intercept_cr         = from->intercept_cr;
3265
	dst->intercept_dr         = from->intercept_dr;
3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285
	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;
3286
	dst->virt_ext              = from->virt_ext;
3287 3288
	dst->pause_filter_count   = from->pause_filter_count;
	dst->pause_filter_thresh  = from->pause_filter_thresh;
3289 3290
}

3291
static int nested_svm_vmexit(struct vcpu_svm *svm)
3292
{
3293
	struct vmcb *nested_vmcb;
3294
	struct vmcb *hsave = svm->nested.hsave;
J
Joerg Roedel 已提交
3295
	struct vmcb *vmcb = svm->vmcb;
3296
	struct page *page;
3297

3298 3299 3300 3301
	trace_kvm_nested_vmexit_inject(vmcb->control.exit_code,
				       vmcb->control.exit_info_1,
				       vmcb->control.exit_info_2,
				       vmcb->control.exit_int_info,
3302 3303
				       vmcb->control.exit_int_info_err,
				       KVM_ISA_SVM);
3304

3305
	nested_vmcb = nested_svm_map(svm, svm->nested.vmcb, &page);
3306 3307 3308
	if (!nested_vmcb)
		return 1;

3309 3310
	/* Exit Guest-Mode */
	leave_guest_mode(&svm->vcpu);
3311 3312
	svm->nested.vmcb = 0;

3313
	/* Give the current vmcb to the guest */
J
Joerg Roedel 已提交
3314 3315 3316 3317 3318 3319 3320 3321
	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;
3322
	nested_vmcb->save.efer   = svm->vcpu.arch.efer;
3323
	nested_vmcb->save.cr0    = kvm_read_cr0(&svm->vcpu);
3324
	nested_vmcb->save.cr3    = kvm_read_cr3(&svm->vcpu);
J
Joerg Roedel 已提交
3325
	nested_vmcb->save.cr2    = vmcb->save.cr2;
3326
	nested_vmcb->save.cr4    = svm->vcpu.arch.cr4;
3327
	nested_vmcb->save.rflags = kvm_get_rflags(&svm->vcpu);
J
Joerg Roedel 已提交
3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343
	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;
3344 3345 3346

	if (svm->nrips_enabled)
		nested_vmcb->control.next_rip  = vmcb->control.next_rip;
3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362

	/*
	 * 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
3363 3364 3365
	nested_vmcb->control.tlb_ctl           = 0;
	nested_vmcb->control.event_inj         = 0;
	nested_vmcb->control.event_inj_err     = 0;
3366

3367 3368 3369 3370 3371
	nested_vmcb->control.pause_filter_count =
		svm->vmcb->control.pause_filter_count;
	nested_vmcb->control.pause_filter_thresh =
		svm->vmcb->control.pause_filter_thresh;

3372 3373 3374 3375 3376
	/* 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 */
3377
	copy_vmcb_control_area(vmcb, hsave);
3378

3379
	svm->vcpu.arch.tsc_offset = svm->vmcb->control.tsc_offset;
3380 3381
	kvm_clear_exception_queue(&svm->vcpu);
	kvm_clear_interrupt_queue(&svm->vcpu);
3382

3383 3384
	svm->nested.nested_cr3 = 0;

3385 3386 3387 3388 3389 3390 3391
	/* 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;
3392
	kvm_set_rflags(&svm->vcpu, hsave->save.rflags);
3393 3394 3395 3396 3397 3398 3399
	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 {
3400
		(void)kvm_set_cr3(&svm->vcpu, hsave->save.cr3);
3401 3402 3403 3404 3405 3406 3407 3408
	}
	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;

3409 3410
	mark_all_dirty(svm->vmcb);

3411
	nested_svm_unmap(page);
3412

3413
	nested_svm_uninit_mmu_context(&svm->vcpu);
3414 3415 3416
	kvm_mmu_reset_context(&svm->vcpu);
	kvm_mmu_load(&svm->vcpu);

3417 3418 3419 3420 3421 3422 3423 3424
	/*
	 * Drop what we picked up for L2 via svm_complete_interrupts() so it
	 * doesn't end up in L1.
	 */
	svm->vcpu.arch.nmi_injected = false;
	kvm_clear_exception_queue(&svm->vcpu);
	kvm_clear_interrupt_queue(&svm->vcpu);

3425 3426
	return 0;
}
A
Alexander Graf 已提交
3427

3428
static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3429
{
3430 3431
	/*
	 * This function merges the msr permission bitmaps of kvm and the
G
Guo Chao 已提交
3432
	 * nested vmcb. It is optimized in that it only merges the parts where
3433 3434
	 * the kvm msr permission bitmap may contain zero bits
	 */
A
Alexander Graf 已提交
3435
	int i;
3436

3437 3438
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
		return true;
3439

3440 3441 3442
	for (i = 0; i < MSRPM_OFFSETS; i++) {
		u32 value, p;
		u64 offset;
3443

3444 3445
		if (msrpm_offsets[i] == 0xffffffff)
			break;
A
Alexander Graf 已提交
3446

3447 3448
		p      = msrpm_offsets[i];
		offset = svm->nested.vmcb_msrpm + (p * 4);
3449

3450
		if (kvm_vcpu_read_guest(&svm->vcpu, offset, &value, 4))
3451 3452 3453 3454
			return false;

		svm->nested.msrpm[p] = svm->msrpm[p] | value;
	}
A
Alexander Graf 已提交
3455

3456
	svm->vmcb->control.msrpm_base_pa = __sme_set(__pa(svm->nested.msrpm));
3457 3458

	return true;
A
Alexander Graf 已提交
3459 3460
}

3461 3462 3463 3464 3465
static bool nested_vmcb_checks(struct vmcb *vmcb)
{
	if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0)
		return false;

3466 3467 3468
	if (vmcb->control.asid == 0)
		return false;

3469 3470
	if ((vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) &&
	    !npt_enabled)
3471 3472
		return false;

3473 3474 3475
	return true;
}

L
Ladi Prosek 已提交
3476 3477
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
3478
{
3479
	if (kvm_get_rflags(&svm->vcpu) & X86_EFLAGS_IF)
A
Alexander Graf 已提交
3480 3481 3482 3483
		svm->vcpu.arch.hflags |= HF_HIF_MASK;
	else
		svm->vcpu.arch.hflags &= ~HF_HIF_MASK;

3484
	if (nested_vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) {
3485 3486 3487 3488
		svm->nested.nested_cr3 = nested_vmcb->control.nested_cr3;
		nested_svm_init_mmu_context(&svm->vcpu);
	}

A
Alexander Graf 已提交
3489 3490 3491 3492 3493 3494 3495
	/* 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;
3496
	kvm_set_rflags(&svm->vcpu, nested_vmcb->save.rflags);
A
Alexander Graf 已提交
3497 3498 3499 3500 3501 3502
	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;
3503
	} else
3504
		(void)kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3);
3505 3506 3507 3508

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

J
Joerg Roedel 已提交
3509
	svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2;
A
Alexander Graf 已提交
3510 3511 3512
	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
3513

A
Alexander Graf 已提交
3514 3515 3516 3517 3518 3519 3520 3521
	/* 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;

3522
	svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa & ~0x0fffULL;
3523
	svm->nested.vmcb_iopm  = nested_vmcb->control.iopm_base_pa  & ~0x0fffULL;
A
Alexander Graf 已提交
3524

J
Joerg Roedel 已提交
3525
	/* cache intercepts */
3526
	svm->nested.intercept_cr         = nested_vmcb->control.intercept_cr;
3527
	svm->nested.intercept_dr         = nested_vmcb->control.intercept_dr;
J
Joerg Roedel 已提交
3528 3529 3530
	svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions;
	svm->nested.intercept            = nested_vmcb->control.intercept;

3531
	svm_flush_tlb(&svm->vcpu, true);
A
Alexander Graf 已提交
3532 3533 3534 3535 3536 3537
	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;

3538 3539
	if (svm->vcpu.arch.hflags & HF_VINTR_MASK) {
		/* We only want the cr8 intercept bits of the guest */
3540 3541
		clr_cr_intercept(svm, INTERCEPT_CR8_READ);
		clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
3542 3543
	}

3544
	/* We don't want to see VMMCALLs from a nested guest */
3545
	clr_intercept(svm, INTERCEPT_VMMCALL);
3546

3547 3548 3549
	svm->vcpu.arch.tsc_offset += nested_vmcb->control.tsc_offset;
	svm->vmcb->control.tsc_offset = svm->vcpu.arch.tsc_offset;

3550
	svm->vmcb->control.virt_ext = nested_vmcb->control.virt_ext;
A
Alexander Graf 已提交
3551 3552 3553 3554 3555
	svm->vmcb->control.int_vector = nested_vmcb->control.int_vector;
	svm->vmcb->control.int_state = nested_vmcb->control.int_state;
	svm->vmcb->control.event_inj = nested_vmcb->control.event_inj;
	svm->vmcb->control.event_inj_err = nested_vmcb->control.event_inj_err;

3556 3557 3558 3559 3560
	svm->vmcb->control.pause_filter_count =
		nested_vmcb->control.pause_filter_count;
	svm->vmcb->control.pause_filter_thresh =
		nested_vmcb->control.pause_filter_thresh;

3561
	nested_svm_unmap(page);
3562

3563 3564 3565
	/* Enter Guest-Mode */
	enter_guest_mode(&svm->vcpu);

3566 3567 3568 3569 3570 3571
	/*
	 * Merge guest and host intercepts - must be called  with vcpu in
	 * guest-mode to take affect here
	 */
	recalc_intercepts(svm);

3572
	svm->nested.vmcb = vmcb_gpa;
3573

3574
	enable_gif(svm);
A
Alexander Graf 已提交
3575

3576
	mark_all_dirty(svm->vmcb);
L
Ladi Prosek 已提交
3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643
}

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);
3644

3645
	return true;
A
Alexander Graf 已提交
3646 3647
}

3648
static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663
{
	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
3664
static int vmload_interception(struct vcpu_svm *svm)
3665
{
3666
	struct vmcb *nested_vmcb;
3667
	struct page *page;
3668
	int ret;
3669

3670 3671 3672
	if (nested_svm_check_permissions(svm))
		return 1;

3673
	nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
3674 3675 3676
	if (!nested_vmcb)
		return 1;

3677
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3678
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3679

3680
	nested_svm_vmloadsave(nested_vmcb, svm->vmcb);
3681
	nested_svm_unmap(page);
3682

3683
	return ret;
3684 3685
}

A
Avi Kivity 已提交
3686
static int vmsave_interception(struct vcpu_svm *svm)
3687
{
3688
	struct vmcb *nested_vmcb;
3689
	struct page *page;
3690
	int ret;
3691

3692 3693 3694
	if (nested_svm_check_permissions(svm))
		return 1;

3695
	nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
3696 3697 3698
	if (!nested_vmcb)
		return 1;

3699
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3700
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3701

3702
	nested_svm_vmloadsave(svm->vmcb, nested_vmcb);
3703
	nested_svm_unmap(page);
3704

3705
	return ret;
3706 3707
}

A
Avi Kivity 已提交
3708
static int vmrun_interception(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3709 3710 3711 3712
{
	if (nested_svm_check_permissions(svm))
		return 1;

3713 3714
	/* Save rip after vmrun instruction */
	kvm_rip_write(&svm->vcpu, kvm_rip_read(&svm->vcpu) + 3);
A
Alexander Graf 已提交
3715

3716
	if (!nested_svm_vmrun(svm))
A
Alexander Graf 已提交
3717 3718
		return 1;

3719
	if (!nested_svm_vmrun_msrpm(svm))
3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731
		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
3732 3733 3734 3735

	return 1;
}

A
Avi Kivity 已提交
3736
static int stgi_interception(struct vcpu_svm *svm)
3737
{
3738 3739
	int ret;

3740 3741 3742
	if (nested_svm_check_permissions(svm))
		return 1;

3743 3744
	/*
	 * If VGIF is enabled, the STGI intercept is only added to
3745
	 * detect the opening of the SMI/NMI window; remove it now.
3746 3747 3748 3749
	 */
	if (vgif_enabled(svm))
		clr_intercept(svm, INTERCEPT_STGI);

3750
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3751
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3752
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3753

3754
	enable_gif(svm);
3755

3756
	return ret;
3757 3758
}

A
Avi Kivity 已提交
3759
static int clgi_interception(struct vcpu_svm *svm)
3760
{
3761 3762
	int ret;

3763 3764 3765 3766
	if (nested_svm_check_permissions(svm))
		return 1;

	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3767
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3768

3769
	disable_gif(svm);
3770 3771

	/* After a CLGI no interrupts should come */
3772 3773 3774 3775 3776
	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);
	}
3777

3778
	return ret;
3779 3780
}

A
Avi Kivity 已提交
3781
static int invlpga_interception(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3782 3783 3784
{
	struct kvm_vcpu *vcpu = &svm->vcpu;

3785 3786
	trace_kvm_invlpga(svm->vmcb->save.rip, kvm_register_read(&svm->vcpu, VCPU_REGS_RCX),
			  kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
3787

A
Alexander Graf 已提交
3788
	/* Let's treat INVLPGA the same as INVLPG (can be optimized!) */
3789
	kvm_mmu_invlpg(vcpu, kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
A
Alexander Graf 已提交
3790 3791

	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3792
	return kvm_skip_emulated_instruction(&svm->vcpu);
A
Alexander Graf 已提交
3793 3794
}

3795 3796
static int skinit_interception(struct vcpu_svm *svm)
{
3797
	trace_kvm_skinit(svm->vmcb->save.rip, kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
3798 3799 3800 3801 3802

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

D
David Kaplan 已提交
3803 3804
static int wbinvd_interception(struct vcpu_svm *svm)
{
3805
	return kvm_emulate_wbinvd(&svm->vcpu);
D
David Kaplan 已提交
3806 3807
}

J
Joerg Roedel 已提交
3808 3809 3810 3811 3812 3813 3814
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;
3815
		return kvm_skip_emulated_instruction(&svm->vcpu);
J
Joerg Roedel 已提交
3816 3817 3818 3819 3820
	}

	return 1;
}

A
Avi Kivity 已提交
3821
static int task_switch_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3822
{
3823
	u16 tss_selector;
3824 3825 3826
	int reason;
	int int_type = svm->vmcb->control.exit_int_info &
		SVM_EXITINTINFO_TYPE_MASK;
3827
	int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK;
3828 3829 3830 3831
	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;
3832 3833
	bool has_error_code = false;
	u32 error_code = 0;
3834 3835

	tss_selector = (u16)svm->vmcb->control.exit_info_1;
3836

3837 3838
	if (svm->vmcb->control.exit_info_2 &
	    (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET))
3839 3840 3841 3842
		reason = TASK_SWITCH_IRET;
	else if (svm->vmcb->control.exit_info_2 &
		 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP))
		reason = TASK_SWITCH_JMP;
3843
	else if (idt_v)
3844 3845 3846 3847
		reason = TASK_SWITCH_GATE;
	else
		reason = TASK_SWITCH_CALL;

3848 3849 3850 3851 3852 3853
	if (reason == TASK_SWITCH_GATE) {
		switch (type) {
		case SVM_EXITINTINFO_TYPE_NMI:
			svm->vcpu.arch.nmi_injected = false;
			break;
		case SVM_EXITINTINFO_TYPE_EXEPT:
3854 3855 3856 3857 3858 3859
			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;
			}
3860 3861 3862 3863 3864 3865 3866 3867 3868
			kvm_clear_exception_queue(&svm->vcpu);
			break;
		case SVM_EXITINTINFO_TYPE_INTR:
			kvm_clear_interrupt_queue(&svm->vcpu);
			break;
		default:
			break;
		}
	}
3869

3870 3871 3872
	if (reason != TASK_SWITCH_GATE ||
	    int_type == SVM_EXITINTINFO_TYPE_SOFT ||
	    (int_type == SVM_EXITINTINFO_TYPE_EXEPT &&
3873 3874
	     (int_vec == OF_VECTOR || int_vec == BP_VECTOR)))
		skip_emulated_instruction(&svm->vcpu);
3875

3876 3877 3878 3879
	if (int_type != SVM_EXITINTINFO_TYPE_SOFT)
		int_vec = -1;

	if (kvm_task_switch(&svm->vcpu, tss_selector, int_vec, reason,
3880 3881 3882 3883 3884 3885 3886
				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
3887 3888
}

A
Avi Kivity 已提交
3889
static int cpuid_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3890
{
3891
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
3892
	return kvm_emulate_cpuid(&svm->vcpu);
A
Avi Kivity 已提交
3893 3894
}

A
Avi Kivity 已提交
3895
static int iret_interception(struct vcpu_svm *svm)
3896 3897
{
	++svm->vcpu.stat.nmi_window_exits;
3898
	clr_intercept(svm, INTERCEPT_IRET);
3899
	svm->vcpu.arch.hflags |= HF_IRET_MASK;
3900
	svm->nmi_iret_rip = kvm_rip_read(&svm->vcpu);
3901
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3902 3903 3904
	return 1;
}

A
Avi Kivity 已提交
3905
static int invlpg_interception(struct vcpu_svm *svm)
M
Marcelo Tosatti 已提交
3906
{
3907
	if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
3908
		return kvm_emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
3909 3910

	kvm_mmu_invlpg(&svm->vcpu, svm->vmcb->control.exit_info_1);
3911
	return kvm_skip_emulated_instruction(&svm->vcpu);
M
Marcelo Tosatti 已提交
3912 3913
}

A
Avi Kivity 已提交
3914
static int emulate_on_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3915
{
3916
	return kvm_emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
A
Avi Kivity 已提交
3917 3918
}

B
Brijesh Singh 已提交
3919 3920
static int rsm_interception(struct vcpu_svm *svm)
{
3921 3922
	return kvm_emulate_instruction_from_buffer(&svm->vcpu,
					rsm_ins_bytes, 2) == EMULATE_DONE;
B
Brijesh Singh 已提交
3923 3924
}

A
Avi Kivity 已提交
3925 3926 3927 3928 3929 3930 3931 3932
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);
3933
	return kvm_complete_insn_gp(&svm->vcpu, err);
A
Avi Kivity 已提交
3934 3935
}

3936 3937
static bool check_selective_cr0_intercepted(struct vcpu_svm *svm,
					    unsigned long val)
3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959
{
	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;
}

3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974
#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;
3975 3976 3977 3978
	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;
3979 3980 3981 3982 3983 3984 3985

	err = 0;
	if (cr >= 16) { /* mov to cr */
		cr -= 16;
		val = kvm_register_read(&svm->vcpu, reg);
		switch (cr) {
		case 0:
3986 3987
			if (!check_selective_cr0_intercepted(svm, val))
				err = kvm_set_cr0(&svm->vcpu, val);
3988 3989 3990
			else
				return 1;

3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014
			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:
4015
			val = kvm_read_cr3(&svm->vcpu);
4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029
			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);
	}
4030
	return kvm_complete_insn_gp(&svm->vcpu, err);
4031 4032
}

4033 4034 4035 4036 4037
static int dr_interception(struct vcpu_svm *svm)
{
	int reg, dr;
	unsigned long val;

4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048
	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;
	}

4049 4050 4051 4052 4053 4054 4055
	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 */
4056 4057
		if (!kvm_require_dr(&svm->vcpu, dr - 16))
			return 1;
4058 4059 4060
		val = kvm_register_read(&svm->vcpu, reg);
		kvm_set_dr(&svm->vcpu, dr - 16, val);
	} else {
4061 4062 4063 4064
		if (!kvm_require_dr(&svm->vcpu, dr))
			return 1;
		kvm_get_dr(&svm->vcpu, dr, &val);
		kvm_register_write(&svm->vcpu, reg, val);
4065 4066
	}

4067
	return kvm_skip_emulated_instruction(&svm->vcpu);
4068 4069
}

A
Avi Kivity 已提交
4070
static int cr8_write_interception(struct vcpu_svm *svm)
4071
{
A
Avi Kivity 已提交
4072
	struct kvm_run *kvm_run = svm->vcpu.run;
A
Andre Przywara 已提交
4073
	int r;
A
Avi Kivity 已提交
4074

4075 4076
	u8 cr8_prev = kvm_get_cr8(&svm->vcpu);
	/* instruction emulation calls kvm_set_cr8() */
4077
	r = cr_interception(svm);
4078
	if (lapic_in_kernel(&svm->vcpu))
4079
		return r;
4080
	if (cr8_prev <= kvm_get_cr8(&svm->vcpu))
4081
		return r;
4082 4083 4084 4085
	kvm_run->exit_reason = KVM_EXIT_SET_TPR;
	return 0;
}

4086 4087
static int svm_get_msr_feature(struct kvm_msr_entry *msr)
{
4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099
	msr->data = 0;

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

	return 0;
4100 4101
}

4102
static int svm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
A
Avi Kivity 已提交
4103
{
4104 4105
	struct vcpu_svm *svm = to_svm(vcpu);

4106
	switch (msr_info->index) {
B
Brian Gerst 已提交
4107
	case MSR_STAR:
4108
		msr_info->data = svm->vmcb->save.star;
A
Avi Kivity 已提交
4109
		break;
4110
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
4111
	case MSR_LSTAR:
4112
		msr_info->data = svm->vmcb->save.lstar;
A
Avi Kivity 已提交
4113 4114
		break;
	case MSR_CSTAR:
4115
		msr_info->data = svm->vmcb->save.cstar;
A
Avi Kivity 已提交
4116 4117
		break;
	case MSR_KERNEL_GS_BASE:
4118
		msr_info->data = svm->vmcb->save.kernel_gs_base;
A
Avi Kivity 已提交
4119 4120
		break;
	case MSR_SYSCALL_MASK:
4121
		msr_info->data = svm->vmcb->save.sfmask;
A
Avi Kivity 已提交
4122 4123 4124
		break;
#endif
	case MSR_IA32_SYSENTER_CS:
4125
		msr_info->data = svm->vmcb->save.sysenter_cs;
A
Avi Kivity 已提交
4126 4127
		break;
	case MSR_IA32_SYSENTER_EIP:
4128
		msr_info->data = svm->sysenter_eip;
A
Avi Kivity 已提交
4129 4130
		break;
	case MSR_IA32_SYSENTER_ESP:
4131
		msr_info->data = svm->sysenter_esp;
A
Avi Kivity 已提交
4132
		break;
P
Paolo Bonzini 已提交
4133 4134 4135 4136 4137
	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
4138 4139 4140 4141 4142
	/*
	 * 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.
	 */
4143
	case MSR_IA32_DEBUGCTLMSR:
4144
		msr_info->data = svm->vmcb->save.dbgctl;
4145 4146
		break;
	case MSR_IA32_LASTBRANCHFROMIP:
4147
		msr_info->data = svm->vmcb->save.br_from;
4148 4149
		break;
	case MSR_IA32_LASTBRANCHTOIP:
4150
		msr_info->data = svm->vmcb->save.br_to;
4151 4152
		break;
	case MSR_IA32_LASTINTFROMIP:
4153
		msr_info->data = svm->vmcb->save.last_excp_from;
4154 4155
		break;
	case MSR_IA32_LASTINTTOIP:
4156
		msr_info->data = svm->vmcb->save.last_excp_to;
4157
		break;
A
Alexander Graf 已提交
4158
	case MSR_VM_HSAVE_PA:
4159
		msr_info->data = svm->nested.hsave_msr;
A
Alexander Graf 已提交
4160
		break;
4161
	case MSR_VM_CR:
4162
		msr_info->data = svm->nested.vm_cr_msr;
4163
		break;
4164 4165
	case MSR_IA32_SPEC_CTRL:
		if (!msr_info->host_initiated &&
4166 4167
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBRS) &&
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_SSBD))
4168 4169 4170 4171
			return 1;

		msr_info->data = svm->spec_ctrl;
		break;
4172 4173 4174 4175 4176 4177 4178
	case MSR_AMD64_VIRT_SPEC_CTRL:
		if (!msr_info->host_initiated &&
		    !guest_cpuid_has(vcpu, X86_FEATURE_VIRT_SSBD))
			return 1;

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

A
Avi Kivity 已提交
4205
static int rdmsr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4206
{
4207
	u32 ecx = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
4208
	struct msr_data msr_info;
A
Avi Kivity 已提交
4209

4210 4211 4212
	msr_info.index = ecx;
	msr_info.host_initiated = false;
	if (svm_get_msr(&svm->vcpu, &msr_info)) {
4213
		trace_kvm_msr_read_ex(ecx);
4214
		kvm_inject_gp(&svm->vcpu, 0);
4215
		return 1;
4216
	} else {
4217
		trace_kvm_msr_read(ecx, msr_info.data);
4218

4219 4220 4221 4222
		kvm_register_write(&svm->vcpu, VCPU_REGS_RAX,
				   msr_info.data & 0xffffffff);
		kvm_register_write(&svm->vcpu, VCPU_REGS_RDX,
				   msr_info.data >> 32);
4223
		svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
4224
		return kvm_skip_emulated_instruction(&svm->vcpu);
A
Avi Kivity 已提交
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
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;
}

4253
static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
A
Avi Kivity 已提交
4254
{
4255 4256
	struct vcpu_svm *svm = to_svm(vcpu);

4257 4258
	u32 ecx = msr->index;
	u64 data = msr->data;
A
Avi Kivity 已提交
4259
	switch (ecx) {
P
Paolo Bonzini 已提交
4260 4261 4262 4263 4264 4265 4266
	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;
4267 4268
	case MSR_IA32_SPEC_CTRL:
		if (!msr->host_initiated &&
4269 4270
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBRS) &&
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_SSBD))
4271 4272 4273
			return 1;

		/* The STIBP bit doesn't fault even if it's not advertised */
4274
		if (data & ~(SPEC_CTRL_IBRS | SPEC_CTRL_STIBP | SPEC_CTRL_SSBD))
4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294
			return 1;

		svm->spec_ctrl = data;

		if (!data)
			break;

		/*
		 * For non-nested:
		 * When it's written (to non-zero) for the first time, pass
		 * it through.
		 *
		 * For nested:
		 * The handling of the MSR bitmap for L2 guests is done in
		 * nested_svm_vmrun_msrpm.
		 * We update the L1 MSR bit as well since it will end up
		 * touching the MSR anyway now.
		 */
		set_msr_interception(svm->msrpm, MSR_IA32_SPEC_CTRL, 1, 1);
		break;
A
Ashok Raj 已提交
4295 4296
	case MSR_IA32_PRED_CMD:
		if (!msr->host_initiated &&
4297
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBPB))
A
Ashok Raj 已提交
4298 4299 4300 4301 4302 4303 4304 4305 4306 4307 4308 4309 4310
			return 1;

		if (data & ~PRED_CMD_IBPB)
			return 1;

		if (!data)
			break;

		wrmsrl(MSR_IA32_PRED_CMD, PRED_CMD_IBPB);
		if (is_guest_mode(vcpu))
			break;
		set_msr_interception(svm->msrpm, MSR_IA32_PRED_CMD, 0, 1);
		break;
4311 4312 4313 4314 4315 4316 4317 4318 4319 4320
	case MSR_AMD64_VIRT_SPEC_CTRL:
		if (!msr->host_initiated &&
		    !guest_cpuid_has(vcpu, X86_FEATURE_VIRT_SSBD))
			return 1;

		if (data & ~SPEC_CTRL_SSBD)
			return 1;

		svm->virt_spec_ctrl = data;
		break;
B
Brian Gerst 已提交
4321
	case MSR_STAR:
4322
		svm->vmcb->save.star = data;
A
Avi Kivity 已提交
4323
		break;
4324
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
4325
	case MSR_LSTAR:
4326
		svm->vmcb->save.lstar = data;
A
Avi Kivity 已提交
4327 4328
		break;
	case MSR_CSTAR:
4329
		svm->vmcb->save.cstar = data;
A
Avi Kivity 已提交
4330 4331
		break;
	case MSR_KERNEL_GS_BASE:
4332
		svm->vmcb->save.kernel_gs_base = data;
A
Avi Kivity 已提交
4333 4334
		break;
	case MSR_SYSCALL_MASK:
4335
		svm->vmcb->save.sfmask = data;
A
Avi Kivity 已提交
4336 4337 4338
		break;
#endif
	case MSR_IA32_SYSENTER_CS:
4339
		svm->vmcb->save.sysenter_cs = data;
A
Avi Kivity 已提交
4340 4341
		break;
	case MSR_IA32_SYSENTER_EIP:
4342
		svm->sysenter_eip = data;
4343
		svm->vmcb->save.sysenter_eip = data;
A
Avi Kivity 已提交
4344 4345
		break;
	case MSR_IA32_SYSENTER_ESP:
4346
		svm->sysenter_esp = data;
4347
		svm->vmcb->save.sysenter_esp = data;
A
Avi Kivity 已提交
4348
		break;
P
Paolo Bonzini 已提交
4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360
	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;
4361
	case MSR_IA32_DEBUGCTLMSR:
4362
		if (!boot_cpu_has(X86_FEATURE_LBRV)) {
4363 4364
			vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n",
				    __func__, data);
4365 4366 4367 4368 4369 4370
			break;
		}
		if (data & DEBUGCTL_RESERVED_BITS)
			return 1;

		svm->vmcb->save.dbgctl = data;
4371
		mark_dirty(svm->vmcb, VMCB_LBR);
4372 4373 4374 4375
		if (data & (1ULL<<0))
			svm_enable_lbrv(svm);
		else
			svm_disable_lbrv(svm);
4376
		break;
A
Alexander Graf 已提交
4377
	case MSR_VM_HSAVE_PA:
4378
		svm->nested.hsave_msr = data;
4379
		break;
4380
	case MSR_VM_CR:
4381
		return svm_set_vm_cr(vcpu, data);
4382
	case MSR_VM_IGNNE:
4383
		vcpu_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data);
4384
		break;
4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402
	case MSR_F10H_DECFG: {
		struct kvm_msr_entry msr_entry;

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

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

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

		svm->msr_decfg = data;
		break;
	}
4403 4404 4405 4406
	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
4407
	default:
4408
		return kvm_set_msr_common(vcpu, msr);
A
Avi Kivity 已提交
4409 4410 4411 4412
	}
	return 0;
}

A
Avi Kivity 已提交
4413
static int wrmsr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4414
{
4415
	struct msr_data msr;
4416 4417
	u32 ecx = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
	u64 data = kvm_read_edx_eax(&svm->vcpu);
4418

4419 4420 4421
	msr.data = data;
	msr.index = ecx;
	msr.host_initiated = false;
4422

4423
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
4424
	if (kvm_set_msr(&svm->vcpu, &msr)) {
4425
		trace_kvm_msr_write_ex(ecx, data);
4426
		kvm_inject_gp(&svm->vcpu, 0);
4427
		return 1;
4428 4429
	} else {
		trace_kvm_msr_write(ecx, data);
4430
		return kvm_skip_emulated_instruction(&svm->vcpu);
4431
	}
A
Avi Kivity 已提交
4432 4433
}

A
Avi Kivity 已提交
4434
static int msr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4435
{
R
Rusty Russell 已提交
4436
	if (svm->vmcb->control.exit_info_1)
A
Avi Kivity 已提交
4437
		return wrmsr_interception(svm);
A
Avi Kivity 已提交
4438
	else
A
Avi Kivity 已提交
4439
		return rdmsr_interception(svm);
A
Avi Kivity 已提交
4440 4441
}

A
Avi Kivity 已提交
4442
static int interrupt_window_interception(struct vcpu_svm *svm)
4443
{
4444
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
4445
	svm_clear_vintr(svm);
4446
	svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
4447
	mark_dirty(svm->vmcb, VMCB_INTR);
4448
	++svm->vcpu.stat.irq_window_exits;
4449 4450 4451
	return 1;
}

4452 4453
static int pause_interception(struct vcpu_svm *svm)
{
4454 4455 4456
	struct kvm_vcpu *vcpu = &svm->vcpu;
	bool in_kernel = (svm_get_cpl(vcpu) == 0);

4457 4458 4459
	if (pause_filter_thresh)
		grow_ple_window(vcpu);

4460
	kvm_vcpu_on_spin(vcpu, in_kernel);
4461 4462 4463
	return 1;
}

4464 4465
static int nop_interception(struct vcpu_svm *svm)
{
4466
	return kvm_skip_emulated_instruction(&(svm->vcpu));
4467 4468 4469 4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480
}

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);
}

4481 4482 4483 4484 4485 4486 4487 4488 4489 4490 4491 4492
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
4493
	u32 index = svm->vmcb->control.exit_info_2 & 0xFF;
4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517
	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: {
		struct kvm_lapic *apic = svm->vcpu.arch.apic;

		/*
4518 4519
		 * Update ICR high and low, then emulate sending IPI,
		 * which is handled when writing APIC_ICR.
4520
		 */
4521 4522
		kvm_lapic_reg_write(apic, APIC_ICR2, icrh);
		kvm_lapic_reg_write(apic, APIC_ICR, icrl);
4523 4524 4525
		break;
	}
	case AVIC_IPI_FAILURE_INVALID_TARGET:
4526 4527
		WARN_ONCE(1, "Invalid IPI target: index=%u, vcpu=%d, icr=%#0x:%#0x\n",
			  index, svm->vcpu.vcpu_id, icrh, icrl);
4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 4540
		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)
{
4541
	struct kvm_svm *kvm_svm = to_kvm_svm(vcpu->kvm);
4542 4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562
	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;
	}

4563
	logical_apic_id_table = (u32 *) page_address(kvm_svm->avic_logical_id_table_page);
4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608 4609 4610 4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642

	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);
4643
	struct kvm_svm *kvm_svm = to_kvm_svm(vcpu->kvm);
4644 4645 4646 4647 4648 4649 4650 4651
	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.
	 */
4652
	if (kvm_svm->ldr_mode == mod)
4653 4654
		return 0;

4655 4656
	clear_page(page_address(kvm_svm->avic_logical_id_table_page));
	kvm_svm->ldr_mode = mod;
4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737

	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 */
4738
		ret = (kvm_emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE);
4739 4740 4741 4742 4743
	}

	return ret;
}

4744
static int (*const svm_exit_handlers[])(struct vcpu_svm *svm) = {
4745 4746 4747 4748
	[SVM_EXIT_READ_CR0]			= cr_interception,
	[SVM_EXIT_READ_CR3]			= cr_interception,
	[SVM_EXIT_READ_CR4]			= cr_interception,
	[SVM_EXIT_READ_CR8]			= cr_interception,
4749
	[SVM_EXIT_CR0_SEL_WRITE]		= cr_interception,
4750
	[SVM_EXIT_WRITE_CR0]			= cr_interception,
4751 4752
	[SVM_EXIT_WRITE_CR3]			= cr_interception,
	[SVM_EXIT_WRITE_CR4]			= cr_interception,
J
Joerg Roedel 已提交
4753
	[SVM_EXIT_WRITE_CR8]			= cr8_write_interception,
4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769
	[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
4770 4771
	[SVM_EXIT_EXCP_BASE + DB_VECTOR]	= db_interception,
	[SVM_EXIT_EXCP_BASE + BP_VECTOR]	= bp_interception,
4772
	[SVM_EXIT_EXCP_BASE + UD_VECTOR]	= ud_interception,
J
Joerg Roedel 已提交
4773 4774
	[SVM_EXIT_EXCP_BASE + PF_VECTOR]	= pf_interception,
	[SVM_EXIT_EXCP_BASE + MC_VECTOR]	= mc_interception,
4775
	[SVM_EXIT_EXCP_BASE + AC_VECTOR]	= ac_interception,
4776
	[SVM_EXIT_EXCP_BASE + GP_VECTOR]	= gp_interception,
J
Joerg Roedel 已提交
4777
	[SVM_EXIT_INTR]				= intr_interception,
4778
	[SVM_EXIT_NMI]				= nmi_interception,
A
Avi Kivity 已提交
4779 4780
	[SVM_EXIT_SMI]				= nop_on_interception,
	[SVM_EXIT_INIT]				= nop_on_interception,
4781
	[SVM_EXIT_VINTR]			= interrupt_window_interception,
A
Avi Kivity 已提交
4782
	[SVM_EXIT_RDPMC]			= rdpmc_interception,
A
Avi Kivity 已提交
4783
	[SVM_EXIT_CPUID]			= cpuid_interception,
4784
	[SVM_EXIT_IRET]                         = iret_interception,
4785
	[SVM_EXIT_INVD]                         = emulate_on_interception,
4786
	[SVM_EXIT_PAUSE]			= pause_interception,
A
Avi Kivity 已提交
4787
	[SVM_EXIT_HLT]				= halt_interception,
M
Marcelo Tosatti 已提交
4788
	[SVM_EXIT_INVLPG]			= invlpg_interception,
A
Alexander Graf 已提交
4789
	[SVM_EXIT_INVLPGA]			= invlpga_interception,
J
Joerg Roedel 已提交
4790
	[SVM_EXIT_IOIO]				= io_interception,
A
Avi Kivity 已提交
4791 4792
	[SVM_EXIT_MSR]				= msr_interception,
	[SVM_EXIT_TASK_SWITCH]			= task_switch_interception,
4793
	[SVM_EXIT_SHUTDOWN]			= shutdown_interception,
A
Alexander Graf 已提交
4794
	[SVM_EXIT_VMRUN]			= vmrun_interception,
4795
	[SVM_EXIT_VMMCALL]			= vmmcall_interception,
4796 4797
	[SVM_EXIT_VMLOAD]			= vmload_interception,
	[SVM_EXIT_VMSAVE]			= vmsave_interception,
4798 4799
	[SVM_EXIT_STGI]				= stgi_interception,
	[SVM_EXIT_CLGI]				= clgi_interception,
4800
	[SVM_EXIT_SKINIT]			= skinit_interception,
D
David Kaplan 已提交
4801
	[SVM_EXIT_WBINVD]                       = wbinvd_interception,
4802 4803
	[SVM_EXIT_MONITOR]			= monitor_interception,
	[SVM_EXIT_MWAIT]			= mwait_interception,
J
Joerg Roedel 已提交
4804
	[SVM_EXIT_XSETBV]			= xsetbv_interception,
4805
	[SVM_EXIT_NPF]				= npf_interception,
B
Brijesh Singh 已提交
4806
	[SVM_EXIT_RSM]                          = rsm_interception,
4807 4808
	[SVM_EXIT_AVIC_INCOMPLETE_IPI]		= avic_incomplete_ipi_interception,
	[SVM_EXIT_AVIC_UNACCELERATED_ACCESS]	= avic_unaccelerated_access_interception,
A
Avi Kivity 已提交
4809 4810
};

4811
static void dump_vmcb(struct kvm_vcpu *vcpu)
4812 4813 4814 4815 4816 4817
{
	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");
4818 4819 4820 4821 4822 4823 4824
	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);
4825 4826
	pr_err("%-20s%d\n", "pause filter threshold:",
	       control->pause_filter_thresh);
4827 4828 4829 4830 4831 4832 4833 4834 4835 4836 4837 4838 4839 4840 4841
	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);
4842
	pr_err("%-20s%016llx\n", "avic_vapic_bar:", control->avic_vapic_bar);
4843 4844
	pr_err("%-20s%08x\n", "event_inj:", control->event_inj);
	pr_err("%-20s%08x\n", "event_inj_err:", control->event_inj_err);
4845
	pr_err("%-20s%lld\n", "virt_ext:", control->virt_ext);
4846
	pr_err("%-20s%016llx\n", "next_rip:", control->next_rip);
4847 4848 4849
	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);
4850
	pr_err("VMCB State Save Area:\n");
4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 4889 4890
	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);
4891 4892
	pr_err("cpl:            %d                efer:         %016llx\n",
		save->cpl, save->efer);
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
	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);
4920 4921
}

4922 4923 4924 4925 4926 4927 4928 4929
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
4930
static int handle_exit(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
4931
{
4932
	struct vcpu_svm *svm = to_svm(vcpu);
A
Avi Kivity 已提交
4933
	struct kvm_run *kvm_run = vcpu->run;
4934
	u32 exit_code = svm->vmcb->control.exit_code;
A
Avi Kivity 已提交
4935

4936 4937
	trace_kvm_exit(exit_code, vcpu, KVM_ISA_SVM);

4938
	if (!is_cr_intercept(svm, INTERCEPT_CR0_WRITE))
4939 4940 4941
		vcpu->arch.cr0 = svm->vmcb->save.cr0;
	if (npt_enabled)
		vcpu->arch.cr3 = svm->vmcb->save.cr3;
4942

4943 4944 4945 4946 4947 4948 4949
	if (unlikely(svm->nested.exit_required)) {
		nested_svm_vmexit(svm);
		svm->nested.exit_required = false;

		return 1;
	}

4950
	if (is_guest_mode(vcpu)) {
4951 4952
		int vmexit;

4953 4954 4955 4956
		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,
4957 4958
					svm->vmcb->control.exit_int_info_err,
					KVM_ISA_SVM);
4959

4960 4961 4962 4963 4964 4965
		vmexit = nested_svm_exit_special(svm);

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

		if (vmexit == NESTED_EXIT_DONE)
4966 4967 4968
			return 1;
	}

4969 4970
	svm_complete_interrupts(svm);

4971 4972 4973 4974
	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;
4975 4976
		pr_err("KVM: FAILED VMRUN WITH VMCB:\n");
		dump_vmcb(vcpu);
4977 4978 4979
		return 0;
	}

4980
	if (is_external_interrupt(svm->vmcb->control.exit_int_info) &&
4981
	    exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR &&
4982 4983
	    exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH &&
	    exit_code != SVM_EXIT_INTR && exit_code != SVM_EXIT_NMI)
4984
		printk(KERN_ERR "%s: unexpected exit_int_info 0x%x "
A
Avi Kivity 已提交
4985
		       "exit_code 0x%x\n",
4986
		       __func__, svm->vmcb->control.exit_int_info,
A
Avi Kivity 已提交
4987 4988
		       exit_code);

4989
	if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
J
Joe Perches 已提交
4990
	    || !svm_exit_handlers[exit_code]) {
4991
		WARN_ONCE(1, "svm: unexpected exit reason 0x%x\n", exit_code);
4992 4993
		kvm_queue_exception(vcpu, UD_VECTOR);
		return 1;
A
Avi Kivity 已提交
4994 4995
	}

A
Avi Kivity 已提交
4996
	return svm_exit_handlers[exit_code](svm);
A
Avi Kivity 已提交
4997 4998 4999 5000 5001 5002
}

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

5003 5004
	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
5005 5006 5007
	load_TR_desc();
}

5008 5009 5010 5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024 5025 5026 5027 5028 5029 5030 5031
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
5032
static void pre_svm_run(struct vcpu_svm *svm)
A
Avi Kivity 已提交
5033 5034 5035
{
	int cpu = raw_smp_processor_id();

5036
	struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
A
Avi Kivity 已提交
5037

5038 5039 5040
	if (sev_guest(svm->vcpu.kvm))
		return pre_sev_run(svm, cpu);

5041
	/* FIXME: handle wraparound of asid_generation */
5042 5043
	if (svm->asid_generation != sd->asid_generation)
		new_asid(svm, sd);
A
Avi Kivity 已提交
5044 5045
}

5046 5047 5048 5049 5050 5051
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;
5052
	set_intercept(svm, INTERCEPT_IRET);
5053 5054
	++vcpu->stat.nmi_injections;
}
A
Avi Kivity 已提交
5055

5056
static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
A
Avi Kivity 已提交
5057 5058 5059
{
	struct vmcb_control_area *control;

5060
	/* The following fields are ignored when AVIC is enabled */
R
Rusty Russell 已提交
5061
	control = &svm->vmcb->control;
5062
	control->int_vector = irq;
A
Avi Kivity 已提交
5063 5064 5065
	control->int_ctl &= ~V_INTR_PRIO_MASK;
	control->int_ctl |= V_IRQ_MASK |
		((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
5066
	mark_dirty(svm->vmcb, VMCB_INTR);
A
Avi Kivity 已提交
5067 5068
}

5069
static void svm_set_irq(struct kvm_vcpu *vcpu)
E
Eddie Dong 已提交
5070 5071 5072
{
	struct vcpu_svm *svm = to_svm(vcpu);

5073
	BUG_ON(!(gif_set(svm)));
5074

5075 5076 5077
	trace_kvm_inj_virq(vcpu->arch.interrupt.nr);
	++vcpu->stat.irq_injections;

5078 5079
	svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr |
		SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR;
E
Eddie Dong 已提交
5080 5081
}

5082 5083 5084 5085 5086
static inline bool svm_nested_virtualize_tpr(struct kvm_vcpu *vcpu)
{
	return is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK);
}

5087
static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
5088 5089 5090
{
	struct vcpu_svm *svm = to_svm(vcpu);

5091 5092
	if (svm_nested_virtualize_tpr(vcpu) ||
	    kvm_vcpu_apicv_active(vcpu))
5093 5094
		return;

5095 5096
	clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);

5097
	if (irr == -1)
5098 5099
		return;

5100
	if (tpr >= irr)
5101
		set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
5102
}
5103

5104
static void svm_set_virtual_apic_mode(struct kvm_vcpu *vcpu)
5105 5106 5107 5108
{
	return;
}

5109
static bool svm_get_enable_apicv(struct kvm_vcpu *vcpu)
5110
{
5111
	return avic && irqchip_split(vcpu->kvm);
5112 5113 5114 5115
}

static void svm_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr)
{
5116 5117
}

5118
static void svm_hwapic_isr_update(struct kvm_vcpu *vcpu, int max_isr)
5119
{
5120 5121
}

5122
/* Note: Currently only used by Hyper-V. */
5123
static void svm_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu)
5124
{
5125 5126 5127
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *vmcb = svm->vmcb;

5128
	if (!kvm_vcpu_apicv_active(&svm->vcpu))
5129 5130 5131 5132
		return;

	vmcb->control.int_ctl &= ~AVIC_ENABLE_MASK;
	mark_dirty(vmcb, VMCB_INTR);
5133 5134
}

5135
static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
5136 5137 5138 5139
{
	return;
}

5140 5141 5142 5143 5144 5145 5146
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,
5147
		       kvm_cpu_get_apicid(vcpu->cpu));
5148 5149 5150 5151
	else
		kvm_vcpu_wake_up(vcpu);
}

5152 5153 5154 5155 5156 5157 5158 5159 5160 5161 5162 5163 5164 5165 5166 5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177 5178 5179 5180 5181 5182 5183 5184 5185 5186 5187 5188 5189 5190 5191 5192 5193 5194 5195 5196 5197 5198 5199 5200 5201 5202 5203 5204 5205 5206 5207 5208 5209 5210 5211 5212 5213 5214 5215 5216 5217 5218 5219 5220 5221 5222 5223 5224 5225 5226 5227 5228 5229 5230 5231 5232 5233 5234 5235 5236 5237 5238 5239 5240
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);
5241
	vcpu_info->pi_desc_addr = __sme_set(page_to_phys((*svm)->avic_backing_page));
5242 5243 5244 5245 5246 5247 5248 5249 5250 5251 5252 5253 5254 5255 5256 5257 5258 5259 5260 5261 5262 5263 5264 5265 5266 5267 5268 5269 5270 5271 5272 5273 5274 5275 5276 5277 5278 5279 5280 5281 5282 5283 5284 5285 5286 5287 5288 5289 5290 5291
	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 */
5292 5293
			pi.base = __sme_set(page_to_phys(svm->avic_backing_page) &
					    AVIC_HPA_MASK);
5294
			pi.ga_tag = AVIC_GATAG(to_kvm_svm(kvm)->avic_vm_id,
5295 5296 5297 5298 5299 5300 5301 5302 5303 5304 5305 5306 5307 5308 5309 5310 5311 5312 5313 5314 5315 5316 5317 5318 5319 5320 5321 5322 5323 5324 5325 5326 5327 5328 5329 5330 5331 5332 5333 5334 5335 5336 5337
						     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) {
5338 5339
			trace_kvm_pi_irte_update(host_irq, svm->vcpu.vcpu_id,
						 e->gsi, vcpu_info.vector,
5340 5341 5342 5343 5344 5345 5346 5347 5348 5349 5350 5351 5352 5353 5354
						 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;
}

5355 5356 5357 5358
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
5359 5360 5361 5362 5363 5364
	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;
5365 5366
}

J
Jan Kiszka 已提交
5367 5368 5369 5370 5371 5372 5373 5374 5375 5376 5377 5378 5379
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;
5380
		set_intercept(svm, INTERCEPT_IRET);
J
Jan Kiszka 已提交
5381 5382
	} else {
		svm->vcpu.arch.hflags &= ~HF_NMI_MASK;
5383
		clr_intercept(svm, INTERCEPT_IRET);
J
Jan Kiszka 已提交
5384 5385 5386
	}
}

5387 5388 5389 5390
static int svm_interrupt_allowed(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *vmcb = svm->vmcb;
5391 5392 5393 5394 5395 5396
	int ret;

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

5397
	ret = !!(kvm_get_rflags(vcpu) & X86_EFLAGS_IF);
5398

5399
	if (is_guest_mode(vcpu))
5400 5401 5402
		return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK);

	return ret;
5403 5404
}

5405
static void enable_irq_window(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
5406
{
5407 5408
	struct vcpu_svm *svm = to_svm(vcpu);

5409 5410 5411
	if (kvm_vcpu_apicv_active(vcpu))
		return;

J
Joerg Roedel 已提交
5412 5413 5414 5415
	/*
	 * 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
5416 5417 5418
	 * 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
5419
	 */
5420
	if ((vgif_enabled(svm) || gif_set(svm)) && nested_svm_intr(svm)) {
5421 5422 5423
		svm_set_vintr(svm);
		svm_inject_irq(svm, 0x0);
	}
5424 5425
}

5426
static void enable_nmi_window(struct kvm_vcpu *vcpu)
5427
{
5428
	struct vcpu_svm *svm = to_svm(vcpu);
5429

5430 5431
	if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK))
	    == HF_NMI_MASK)
5432
		return; /* IRET will cause a vm exit */
5433

5434 5435 5436
	if (!gif_set(svm)) {
		if (vgif_enabled(svm))
			set_intercept(svm, INTERCEPT_STGI);
5437
		return; /* STGI will cause a vm exit */
5438
	}
5439 5440 5441 5442

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

J
Joerg Roedel 已提交
5443 5444 5445 5446
	/*
	 * Something prevents NMI from been injected. Single step over possible
	 * problem (IRET or exception injection or interrupt shadow)
	 */
5447
	svm->nmi_singlestep_guest_rflags = svm_get_rflags(vcpu);
J
Jan Kiszka 已提交
5448
	svm->nmi_singlestep = true;
5449
	svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);
5450 5451
}

5452 5453 5454 5455 5456
static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)
{
	return 0;
}

5457 5458 5459 5460 5461
static int svm_set_identity_map_addr(struct kvm *kvm, u64 ident_addr)
{
	return 0;
}

5462
static void svm_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa)
5463
{
5464 5465 5466 5467 5468 5469
	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--;
5470 5471
}

5472 5473 5474 5475 5476 5477 5478
static void svm_flush_tlb_gva(struct kvm_vcpu *vcpu, gva_t gva)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	invlpga(gva, svm->vmcb->control.asid);
}

5479 5480 5481 5482
static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
{
}

5483 5484 5485 5486
static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

5487
	if (svm_nested_virtualize_tpr(vcpu))
5488 5489
		return;

5490
	if (!is_cr_intercept(svm, INTERCEPT_CR8_WRITE)) {
5491
		int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK;
5492
		kvm_set_cr8(vcpu, cr8);
5493 5494 5495
	}
}

5496 5497 5498 5499 5500
static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u64 cr8;

5501 5502
	if (svm_nested_virtualize_tpr(vcpu) ||
	    kvm_vcpu_apicv_active(vcpu))
5503 5504
		return;

5505 5506 5507 5508 5509
	cr8 = kvm_get_cr8(vcpu);
	svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
	svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK;
}

5510 5511 5512 5513 5514
static void svm_complete_interrupts(struct vcpu_svm *svm)
{
	u8 vector;
	int type;
	u32 exitintinfo = svm->vmcb->control.exit_int_info;
5515 5516 5517
	unsigned int3_injected = svm->int3_injected;

	svm->int3_injected = 0;
5518

5519 5520 5521 5522 5523 5524
	/*
	 * 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) {
5525
		svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK);
5526 5527
		kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
	}
5528

5529 5530 5531 5532 5533 5534 5535
	svm->vcpu.arch.nmi_injected = false;
	kvm_clear_exception_queue(&svm->vcpu);
	kvm_clear_interrupt_queue(&svm->vcpu);

	if (!(exitintinfo & SVM_EXITINTINFO_VALID))
		return;

5536 5537
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);

5538 5539 5540 5541 5542 5543 5544 5545
	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:
5546 5547 5548 5549 5550 5551 5552 5553 5554 5555 5556
		/*
		 * 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);
5557
			break;
5558
		}
5559 5560
		if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) {
			u32 err = svm->vmcb->control.exit_int_info_err;
5561
			kvm_requeue_exception_e(&svm->vcpu, vector, err);
5562 5563

		} else
5564
			kvm_requeue_exception(&svm->vcpu, vector);
5565 5566
		break;
	case SVM_EXITINTINFO_TYPE_INTR:
5567
		kvm_queue_interrupt(&svm->vcpu, vector, false);
5568 5569 5570 5571 5572 5573
		break;
	default:
		break;
	}
}

A
Avi Kivity 已提交
5574 5575 5576 5577 5578 5579 5580 5581 5582 5583 5584
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
5585
static void svm_vcpu_run(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
5586
{
5587
	struct vcpu_svm *svm = to_svm(vcpu);
5588

5589 5590 5591 5592
	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];

5593 5594 5595 5596 5597 5598 5599
	/*
	 * A vmexit emulation is required before the vcpu can be executed
	 * again.
	 */
	if (unlikely(svm->nested.exit_required))
		return;

5600 5601 5602 5603 5604 5605 5606 5607 5608 5609 5610 5611 5612 5613 5614 5615
	/*
	 * 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
5616
	pre_svm_run(svm);
A
Avi Kivity 已提交
5617

5618 5619
	sync_lapic_to_cr8(vcpu);

5620
	svm->vmcb->save.cr2 = vcpu->arch.cr2;
A
Avi Kivity 已提交
5621

5622 5623
	clgi();

5624 5625 5626 5627 5628 5629
	/*
	 * If this vCPU has touched SPEC_CTRL, restore the guest's value if
	 * it's non-zero. Since vmentry is serialising on affected CPUs, there
	 * is no need to worry about the conditional branch over the wrmsr
	 * being speculatively taken.
	 */
5630
	x86_spec_ctrl_set_guest(svm->spec_ctrl, svm->virt_spec_ctrl);
5631

5632 5633
	local_irq_enable();

A
Avi Kivity 已提交
5634
	asm volatile (
A
Avi Kivity 已提交
5635 5636 5637 5638 5639 5640 5641
		"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"
5642
#ifdef CONFIG_X86_64
R
Rusty Russell 已提交
5643 5644 5645 5646 5647 5648 5649 5650
		"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
5651 5652 5653
#endif

		/* Enter guest mode */
A
Avi Kivity 已提交
5654 5655
		"push %%" _ASM_AX " \n\t"
		"mov %c[vmcb](%[svm]), %%" _ASM_AX " \n\t"
5656 5657 5658
		__ex("vmload %%" _ASM_AX) "\n\t"
		__ex("vmrun %%" _ASM_AX) "\n\t"
		__ex("vmsave %%" _ASM_AX) "\n\t"
A
Avi Kivity 已提交
5659
		"pop %%" _ASM_AX " \n\t"
A
Avi Kivity 已提交
5660 5661

		/* Save guest registers, load host registers */
A
Avi Kivity 已提交
5662 5663 5664 5665 5666 5667
		"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"
5668
#ifdef CONFIG_X86_64
R
Rusty Russell 已提交
5669 5670 5671 5672 5673 5674 5675 5676
		"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"
5677 5678 5679 5680
		/*
		* Clear host registers marked as clobbered to prevent
		* speculative use.
		*/
5681 5682 5683 5684 5685 5686 5687 5688
		"xor %%r8d, %%r8d \n\t"
		"xor %%r9d, %%r9d \n\t"
		"xor %%r10d, %%r10d \n\t"
		"xor %%r11d, %%r11d \n\t"
		"xor %%r12d, %%r12d \n\t"
		"xor %%r13d, %%r13d \n\t"
		"xor %%r14d, %%r14d \n\t"
		"xor %%r15d, %%r15d \n\t"
A
Avi Kivity 已提交
5689
#endif
5690 5691 5692 5693 5694
		"xor %%ebx, %%ebx \n\t"
		"xor %%ecx, %%ecx \n\t"
		"xor %%edx, %%edx \n\t"
		"xor %%esi, %%esi \n\t"
		"xor %%edi, %%edi \n\t"
A
Avi Kivity 已提交
5695
		"pop %%" _ASM_BP
A
Avi Kivity 已提交
5696
		:
R
Rusty Russell 已提交
5697
		: [svm]"a"(svm),
A
Avi Kivity 已提交
5698
		  [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
5699 5700 5701 5702 5703 5704
		  [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]))
5705
#ifdef CONFIG_X86_64
5706 5707 5708 5709 5710 5711 5712 5713
		  , [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
5714
#endif
5715 5716
		: "cc", "memory"
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
5717
		, "rbx", "rcx", "rdx", "rsi", "rdi"
5718
		, "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15"
A
Avi Kivity 已提交
5719 5720
#else
		, "ebx", "ecx", "edx", "esi", "edi"
5721 5722
#endif
		);
A
Avi Kivity 已提交
5723

5724 5725 5726 5727 5728 5729 5730 5731 5732 5733 5734 5735
	/* Eliminate branch target predictions from guest mode */
	vmexit_fill_RSB();

#ifdef CONFIG_X86_64
	wrmsrl(MSR_GS_BASE, svm->host.gs_base);
#else
	loadsegment(fs, svm->host.fs);
#ifndef CONFIG_X86_32_LAZY_GS
	loadsegment(gs, svm->host.gs);
#endif
#endif

5736 5737 5738 5739 5740 5741 5742 5743 5744 5745 5746 5747 5748 5749 5750
	/*
	 * We do not use IBRS in the kernel. If this vCPU has used the
	 * SPEC_CTRL MSR it may have left it on; save the value and
	 * turn it off. This is much more efficient than blindly adding
	 * it to the atomic save/restore list. Especially as the former
	 * (Saving guest MSRs on vmexit) doesn't even exist in KVM.
	 *
	 * For non-nested case:
	 * If the L01 MSR bitmap does not intercept the MSR, then we need to
	 * save it.
	 *
	 * For nested case:
	 * If the L02 MSR bitmap does not intercept the MSR, then we need to
	 * save it.
	 */
5751
	if (unlikely(!msr_write_intercepted(vcpu, MSR_IA32_SPEC_CTRL)))
5752
		svm->spec_ctrl = native_read_msr(MSR_IA32_SPEC_CTRL);
5753

A
Avi Kivity 已提交
5754 5755
	reload_tss(vcpu);

5756 5757
	local_irq_disable();

5758 5759
	x86_spec_ctrl_restore_host(svm->spec_ctrl, svm->virt_spec_ctrl);

5760 5761 5762 5763 5764
	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;

5765
	if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
5766
		kvm_before_interrupt(&svm->vcpu);
5767 5768 5769 5770 5771 5772

	stgi();

	/* Any pending NMI will happen here */

	if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
5773
		kvm_after_interrupt(&svm->vcpu);
5774

5775 5776
	sync_cr8_to_lapic(vcpu);

5777
	svm->next_rip = 0;
5778

5779 5780
	svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;

G
Gleb Natapov 已提交
5781 5782
	/* if exit due to PF check for async PF */
	if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR)
5783
		svm->vcpu.arch.apf.host_apf_reason = kvm_read_and_reset_pf_reason();
G
Gleb Natapov 已提交
5784

A
Avi Kivity 已提交
5785 5786 5787 5788
	if (npt_enabled) {
		vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR);
		vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR);
	}
5789 5790 5791 5792 5793 5794 5795 5796

	/*
	 * 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);
5797 5798

	mark_all_clean(svm->vmcb);
A
Avi Kivity 已提交
5799
}
5800
STACK_FRAME_NON_STANDARD(svm_vcpu_run);
A
Avi Kivity 已提交
5801 5802 5803

static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
{
5804 5805
	struct vcpu_svm *svm = to_svm(vcpu);

5806
	svm->vmcb->save.cr3 = __sme_set(root);
5807
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
5808 5809
}

5810 5811 5812 5813
static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root)
{
	struct vcpu_svm *svm = to_svm(vcpu);

5814
	svm->vmcb->control.nested_cr3 = __sme_set(root);
5815
	mark_dirty(svm->vmcb, VMCB_NPT);
5816 5817

	/* Also sync guest cr3 here in case we live migrate */
5818
	svm->vmcb->save.cr3 = kvm_read_cr3(vcpu);
5819
	mark_dirty(svm->vmcb, VMCB_CR);
5820 5821
}

A
Avi Kivity 已提交
5822 5823
static int is_disabled(void)
{
5824 5825 5826 5827 5828 5829
	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
5830 5831 5832
	return 0;
}

I
Ingo Molnar 已提交
5833 5834 5835 5836 5837 5838 5839 5840 5841 5842 5843
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
5844 5845 5846 5847 5848
static void svm_check_processor_compat(void *rtn)
{
	*(int *)rtn = 0;
}

5849 5850 5851 5852 5853
static bool svm_cpu_has_accelerated_tpr(void)
{
	return false;
}

5854
static bool svm_has_emulated_msr(int index)
5855
{
5856 5857 5858 5859 5860 5861 5862
	switch (index) {
	case MSR_IA32_MCG_EXT_CTL:
		return false;
	default:
		break;
	}

5863 5864 5865
	return true;
}

5866 5867 5868 5869 5870
static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
{
	return 0;
}

5871 5872
static void svm_cpuid_update(struct kvm_vcpu *vcpu)
{
5873 5874 5875
	struct vcpu_svm *svm = to_svm(vcpu);

	/* Update nrips enabled cache */
5876
	svm->nrips_enabled = !!guest_cpuid_has(&svm->vcpu, X86_FEATURE_NRIPS);
5877 5878 5879 5880

	if (!kvm_vcpu_apicv_active(vcpu))
		return;

5881
	guest_cpuid_clear(vcpu, X86_FEATURE_X2APIC);
5882 5883
}

5884 5885
static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
{
5886
	switch (func) {
5887 5888 5889 5890
	case 0x1:
		if (avic)
			entry->ecx &= ~bit(X86_FEATURE_X2APIC);
		break;
5891 5892 5893 5894
	case 0x80000001:
		if (nested)
			entry->ecx |= (1 << 2); /* Set SVM bit */
		break;
5895 5896 5897 5898 5899
	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 */
5900 5901 5902 5903
		entry->edx = 0; /* Per default do not support any
				   additional features */

		/* Support next_rip if host supports it */
5904
		if (boot_cpu_has(X86_FEATURE_NRIPS))
5905
			entry->edx |= SVM_FEATURE_NRIP;
5906

5907 5908 5909 5910
		/* Support NPT for the guest if enabled */
		if (npt_enabled)
			entry->edx |= SVM_FEATURE_NPT;

5911
		break;
5912 5913 5914 5915 5916 5917
	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);

5918
	}
5919 5920
}

5921
static int svm_get_lpage_level(void)
5922
{
5923
	return PT_PDPE_LEVEL;
5924 5925
}

5926 5927
static bool svm_rdtscp_supported(void)
{
P
Paolo Bonzini 已提交
5928
	return boot_cpu_has(X86_FEATURE_RDTSCP);
5929 5930
}

5931 5932 5933 5934 5935
static bool svm_invpcid_supported(void)
{
	return false;
}

5936 5937 5938 5939 5940
static bool svm_mpx_supported(void)
{
	return false;
}

5941 5942 5943 5944 5945
static bool svm_xsaves_supported(void)
{
	return false;
}

5946 5947 5948 5949 5950
static bool svm_umip_emulated(void)
{
	return false;
}

5951 5952 5953 5954 5955
static bool svm_pt_supported(void)
{
	return false;
}

5956 5957 5958 5959 5960
static bool svm_has_wbinvd_exit(void)
{
	return true;
}

5961
#define PRE_EX(exit)  { .exit_code = (exit), \
5962
			.stage = X86_ICPT_PRE_EXCEPT, }
5963
#define POST_EX(exit) { .exit_code = (exit), \
5964
			.stage = X86_ICPT_POST_EXCEPT, }
5965
#define POST_MEM(exit) { .exit_code = (exit), \
5966
			.stage = X86_ICPT_POST_MEMACCESS, }
5967

5968
static const struct __x86_intercept {
5969 5970 5971 5972 5973 5974 5975 5976
	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),
5977 5978
	[x86_intercept_dr_read]		= POST_EX(SVM_EXIT_READ_DR0),
	[x86_intercept_dr_write]	= POST_EX(SVM_EXIT_WRITE_DR0),
5979 5980 5981 5982 5983 5984 5985 5986
	[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),
5987 5988 5989 5990 5991 5992 5993 5994
	[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),
5995 5996 5997
	[x86_intercept_rdtscp]		= POST_EX(SVM_EXIT_RDTSCP),
	[x86_intercept_monitor]		= POST_MEM(SVM_EXIT_MONITOR),
	[x86_intercept_mwait]		= POST_EX(SVM_EXIT_MWAIT),
5998 5999 6000 6001 6002 6003 6004 6005 6006
	[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),
6007 6008 6009 6010 6011 6012 6013
	[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),
6014 6015 6016 6017
	[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),
6018 6019
};

6020
#undef PRE_EX
6021
#undef POST_EX
6022
#undef POST_MEM
6023

6024 6025 6026 6027
static int svm_check_intercept(struct kvm_vcpu *vcpu,
			       struct x86_instruction_info *info,
			       enum x86_intercept_stage stage)
{
6028 6029 6030 6031 6032 6033 6034 6035 6036 6037
	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];

6038
	if (stage != icpt_info.stage)
6039 6040 6041 6042 6043 6044 6045 6046 6047 6048 6049 6050 6051 6052
		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;

6053 6054
		if (icpt_info.exit_code != SVM_EXIT_WRITE_CR0 ||
		    info->intercept == x86_intercept_clts)
6055 6056 6057 6058 6059 6060 6061 6062 6063 6064 6065 6066 6067 6068 6069 6070 6071 6072 6073 6074 6075 6076 6077
			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;
	}
6078 6079 6080 6081
	case SVM_EXIT_READ_DR0:
	case SVM_EXIT_WRITE_DR0:
		icpt_info.exit_code += info->modrm_reg;
		break;
6082 6083 6084 6085 6086 6087
	case SVM_EXIT_MSR:
		if (info->intercept == x86_intercept_wrmsr)
			vmcb->control.exit_info_1 = 1;
		else
			vmcb->control.exit_info_1 = 0;
		break;
6088 6089 6090 6091 6092 6093 6094
	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;
6095
		break;
6096 6097 6098 6099 6100 6101
	case SVM_EXIT_IOIO: {
		u64 exit_info;
		u32 bytes;

		if (info->intercept == x86_intercept_in ||
		    info->intercept == x86_intercept_ins) {
6102 6103
			exit_info = ((info->src_val & 0xffff) << 16) |
				SVM_IOIO_TYPE_MASK;
6104
			bytes = info->dst_bytes;
6105
		} else {
6106
			exit_info = (info->dst_val & 0xffff) << 16;
6107
			bytes = info->src_bytes;
6108 6109 6110 6111 6112 6113 6114 6115 6116 6117 6118 6119 6120 6121 6122 6123 6124 6125 6126 6127
		}

		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;
	}
6128 6129 6130 6131
	default:
		break;
	}

6132 6133 6134
	/* TODO: Advertise NRIPS to guest hypervisor unconditionally */
	if (static_cpu_has(X86_FEATURE_NRIPS))
		vmcb->control.next_rip  = info->next_rip;
6135 6136 6137 6138 6139 6140 6141 6142
	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;
6143 6144
}

6145 6146 6147
static void svm_handle_external_intr(struct kvm_vcpu *vcpu)
{
	local_irq_enable();
P
Paolo Bonzini 已提交
6148 6149 6150 6151 6152 6153
	/*
	 * We must have an instruction with interrupts enabled, so
	 * the timer interrupt isn't delayed by the interrupt shadow.
	 */
	asm("nop");
	local_irq_disable();
6154 6155
}

6156 6157
static void svm_sched_in(struct kvm_vcpu *vcpu, int cpu)
{
6158 6159
	if (pause_filter_thresh)
		shrink_ple_window(vcpu);
6160 6161
}

6162 6163 6164 6165 6166 6167 6168 6169 6170
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);
}

6171 6172 6173 6174 6175 6176
static void svm_setup_mce(struct kvm_vcpu *vcpu)
{
	/* [63:9] are reserved. */
	vcpu->arch.mcg_cap &= 0x1ff;
}

6177 6178
static int svm_smi_allowed(struct kvm_vcpu *vcpu)
{
6179 6180 6181 6182 6183 6184 6185 6186 6187 6188 6189 6190 6191 6192
	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;
	}

6193 6194 6195
	return 1;
}

6196 6197
static int svm_pre_enter_smm(struct kvm_vcpu *vcpu, char *smstate)
{
6198 6199 6200 6201 6202 6203 6204 6205 6206 6207 6208 6209 6210 6211 6212 6213 6214
	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;
	}
6215 6216 6217 6218 6219
	return 0;
}

static int svm_pre_leave_smm(struct kvm_vcpu *vcpu, u64 smbase)
{
6220 6221 6222 6223 6224 6225 6226 6227 6228 6229 6230 6231 6232 6233 6234 6235 6236 6237 6238 6239 6240 6241 6242 6243
	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;
6244 6245
}

6246 6247 6248 6249 6250 6251 6252 6253 6254 6255 6256 6257 6258
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
6259 6260 6261 6262 6263 6264 6265 6266 6267 6268 6269 6270 6271 6272 6273 6274 6275
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)
{
6276
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
B
Brijesh Singh 已提交
6277 6278 6279
	int asid, ret;

	ret = -EBUSY;
6280 6281 6282
	if (unlikely(sev->active))
		return ret;

B
Brijesh Singh 已提交
6283 6284 6285 6286 6287 6288 6289 6290 6291 6292
	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;
6293
	INIT_LIST_HEAD(&sev->regions_list);
B
Brijesh Singh 已提交
6294 6295 6296 6297 6298 6299 6300 6301

	return 0;

e_free:
	__sev_asid_free(asid);
	return ret;
}

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
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;
}

6327
static int __sev_issue_cmd(int fd, int id, void *data, int *error)
6328 6329 6330 6331 6332 6333 6334 6335 6336 6337 6338 6339 6340 6341
{
	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;
}

6342 6343
static int sev_issue_cmd(struct kvm *kvm, int id, void *data, int *error)
{
6344
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6345 6346 6347 6348

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

6349 6350
static int sev_launch_start(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6351
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6352 6353 6354 6355 6356 6357 6358 6359 6360 6361 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
	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 */
6396
	ret = __sev_issue_cmd(argp->sev_fd, SEV_CMD_LAUNCH_START, start, error);
6397 6398 6399 6400 6401 6402 6403 6404 6405 6406 6407 6408 6409 6410 6411 6412 6413 6414 6415 6416 6417 6418 6419 6420 6421 6422 6423 6424
	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;
}

6425 6426 6427 6428 6429 6430 6431 6432 6433 6434 6435 6436 6437 6438 6439 6440 6441 6442 6443 6444 6445 6446 6447 6448
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;
6449
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
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 6507 6508 6509 6510 6511 6512 6513 6514 6515 6516 6517 6518 6519 6520 6521
	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;
}

6522 6523
static int sev_launch_measure(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6524
	void __user *measure = (void __user *)(uintptr_t)argp->data;
6525
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6526 6527
	struct sev_data_launch_measure *data;
	struct kvm_sev_launch_measure params;
6528
	void __user *p = NULL;
6529 6530 6531 6532 6533 6534
	void *blob = NULL;
	int ret;

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

6535
	if (copy_from_user(&params, measure, sizeof(params)))
6536 6537 6538 6539 6540 6541 6542 6543 6544 6545
		return -EFAULT;

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

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

6546 6547
	p = (void __user *)(uintptr_t)params.uaddr;
	if (p) {
6548 6549 6550 6551 6552 6553 6554 6555 6556 6557 6558 6559 6560 6561 6562 6563 6564 6565 6566 6567 6568 6569 6570 6571 6572 6573 6574 6575
		if (params.len > SEV_FW_BLOB_MAX_SIZE) {
			ret = -EINVAL;
			goto e_free;
		}

		ret = -ENOMEM;
		blob = kmalloc(params.len, GFP_KERNEL);
		if (!blob)
			goto e_free;

		data->address = __psp_pa(blob);
		data->len = params.len;
	}

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

	/*
	 * If we query the session length, FW responded with expected data.
	 */
	if (!params.len)
		goto done;

	if (ret)
		goto e_free_blob;

	if (blob) {
6576
		if (copy_to_user(p, blob, params.len))
6577 6578 6579 6580 6581
			ret = -EFAULT;
	}

done:
	params.len = data->len;
6582
	if (copy_to_user(measure, &params, sizeof(params)))
6583 6584 6585 6586 6587 6588 6589 6590
		ret = -EFAULT;
e_free_blob:
	kfree(blob);
e_free:
	kfree(data);
	return ret;
}

6591 6592
static int sev_launch_finish(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6593
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6594 6595 6596 6597 6598 6599 6600 6601 6602 6603 6604 6605 6606 6607 6608 6609 6610
	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;
}

6611 6612
static int sev_guest_status(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6613
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
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
	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;
}

6641 6642 6643 6644
static int __sev_issue_dbg_cmd(struct kvm *kvm, unsigned long src,
			       unsigned long dst, int size,
			       int *error, bool enc)
{
6645
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6646 6647 6648 6649 6650 6651 6652 6653 6654 6655 6656 6657 6658 6659 6660 6661 6662 6663 6664 6665 6666 6667 6668 6669 6670 6671 6672 6673 6674 6675 6676 6677 6678 6679 6680 6681 6682 6683 6684 6685 6686 6687 6688 6689 6690 6691 6692 6693 6694 6695 6696 6697 6698 6699 6700 6701 6702 6703 6704 6705 6706 6707 6708 6709 6710 6711 6712 6713 6714 6715 6716 6717
	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;
}

6718 6719 6720 6721 6722 6723 6724 6725 6726 6727 6728 6729 6730 6731 6732 6733 6734 6735 6736 6737 6738 6739 6740 6741 6742 6743 6744 6745 6746 6747 6748 6749 6750 6751 6752 6753 6754 6755 6756 6757 6758 6759 6760 6761 6762 6763 6764 6765 6766 6767 6768 6769 6770 6771 6772 6773 6774 6775 6776 6777 6778 6779 6780 6781 6782 6783 6784 6785 6786 6787 6788 6789 6790 6791 6792 6793 6794
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;
}

6795 6796 6797
static int sev_dbg_crypt(struct kvm *kvm, struct kvm_sev_cmd *argp, bool dec)
{
	unsigned long vaddr, vaddr_end, next_vaddr;
6798
	unsigned long dst_vaddr;
6799 6800 6801 6802 6803 6804 6805 6806 6807 6808 6809 6810 6811 6812 6813 6814 6815 6816 6817 6818 6819 6820 6821 6822 6823 6824 6825 6826 6827 6828 6829 6830 6831 6832 6833 6834 6835 6836 6837 6838 6839 6840 6841 6842 6843 6844 6845
	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;

	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);

6846 6847 6848 6849 6850 6851 6852 6853 6854 6855 6856 6857 6858
		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);
6859 6860 6861 6862 6863 6864 6865 6866 6867 6868 6869 6870 6871 6872 6873

		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;
}

6874 6875
static int sev_launch_secret(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6876
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6877 6878 6879 6880 6881
	struct sev_data_launch_secret *data;
	struct kvm_sev_launch_secret params;
	struct page **pages;
	void *blob, *hdr;
	unsigned long n;
6882
	int ret, offset;
6883 6884 6885 6886 6887 6888 6889 6890 6891 6892 6893 6894 6895 6896 6897 6898 6899 6900 6901 6902 6903 6904 6905 6906 6907

	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;

6908 6909 6910 6911
	offset = params.guest_uaddr & (PAGE_SIZE - 1);
	data->guest_address = __sme_page_pa(pages[0]) + offset;
	data->guest_len = params.guest_len;

6912 6913 6914 6915 6916 6917 6918 6919 6920 6921 6922 6923 6924 6925
	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;
	}
6926 6927
	data->hdr_address = __psp_pa(hdr);
	data->hdr_len = params.hdr_len;
6928 6929 6930 6931 6932 6933 6934 6935 6936 6937 6938 6939 6940 6941 6942

	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
6943 6944 6945 6946 6947 6948 6949 6950 6951 6952 6953 6954 6955 6956 6957 6958 6959
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;
6960 6961 6962
	case KVM_SEV_LAUNCH_START:
		r = sev_launch_start(kvm, &sev_cmd);
		break;
6963 6964 6965
	case KVM_SEV_LAUNCH_UPDATE_DATA:
		r = sev_launch_update_data(kvm, &sev_cmd);
		break;
6966 6967 6968
	case KVM_SEV_LAUNCH_MEASURE:
		r = sev_launch_measure(kvm, &sev_cmd);
		break;
6969 6970 6971
	case KVM_SEV_LAUNCH_FINISH:
		r = sev_launch_finish(kvm, &sev_cmd);
		break;
6972 6973 6974
	case KVM_SEV_GUEST_STATUS:
		r = sev_guest_status(kvm, &sev_cmd);
		break;
6975 6976 6977
	case KVM_SEV_DBG_DECRYPT:
		r = sev_dbg_crypt(kvm, &sev_cmd, true);
		break;
6978 6979 6980
	case KVM_SEV_DBG_ENCRYPT:
		r = sev_dbg_crypt(kvm, &sev_cmd, false);
		break;
6981 6982 6983
	case KVM_SEV_LAUNCH_SECRET:
		r = sev_launch_secret(kvm, &sev_cmd);
		break;
B
Brijesh Singh 已提交
6984 6985 6986 6987 6988 6989 6990 6991 6992 6993 6994 6995 6996
	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;
}

6997 6998 6999
static int svm_register_enc_region(struct kvm *kvm,
				   struct kvm_enc_region *range)
{
7000
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
7001 7002 7003 7004 7005 7006
	struct enc_region *region;
	int ret = 0;

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

7007 7008 7009
	if (range->addr > ULONG_MAX || range->size > ULONG_MAX)
		return -EINVAL;

7010 7011 7012 7013 7014 7015 7016 7017 7018 7019 7020 7021 7022 7023 7024 7025 7026 7027 7028 7029 7030 7031 7032 7033 7034 7035 7036 7037 7038 7039 7040 7041 7042 7043 7044
	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)
{
7045
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
7046 7047 7048 7049 7050 7051 7052 7053 7054 7055 7056 7057 7058 7059 7060 7061 7062 7063 7064 7065 7066 7067 7068 7069 7070 7071 7072 7073 7074 7075 7076 7077 7078 7079 7080 7081 7082 7083 7084 7085 7086 7087
	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;
}

7088 7089 7090 7091 7092 7093
static uint16_t nested_get_evmcs_version(struct kvm_vcpu *vcpu)
{
	/* Not supported */
	return 0;
}

7094 7095 7096 7097 7098 7099 7100
static int nested_enable_evmcs(struct kvm_vcpu *vcpu,
				   uint16_t *vmcs_version)
{
	/* Intel-only feature */
	return -ENODEV;
}

7101
static struct kvm_x86_ops svm_x86_ops __ro_after_init = {
A
Avi Kivity 已提交
7102 7103 7104 7105
	.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
7106
	.check_processor_compatibility = svm_check_processor_compat,
A
Avi Kivity 已提交
7107 7108
	.hardware_enable = svm_hardware_enable,
	.hardware_disable = svm_hardware_disable,
7109
	.cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr,
7110
	.has_emulated_msr = svm_has_emulated_msr,
A
Avi Kivity 已提交
7111 7112 7113

	.vcpu_create = svm_create_vcpu,
	.vcpu_free = svm_free_vcpu,
7114
	.vcpu_reset = svm_vcpu_reset,
A
Avi Kivity 已提交
7115

7116 7117
	.vm_alloc = svm_vm_alloc,
	.vm_free = svm_vm_free,
7118
	.vm_init = avic_vm_init,
B
Brijesh Singh 已提交
7119
	.vm_destroy = svm_vm_destroy,
7120

7121
	.prepare_guest_switch = svm_prepare_guest_switch,
A
Avi Kivity 已提交
7122 7123
	.vcpu_load = svm_vcpu_load,
	.vcpu_put = svm_vcpu_put,
7124 7125
	.vcpu_blocking = svm_vcpu_blocking,
	.vcpu_unblocking = svm_vcpu_unblocking,
A
Avi Kivity 已提交
7126

7127
	.update_bp_intercept = update_bp_intercept,
7128
	.get_msr_feature = svm_get_msr_feature,
A
Avi Kivity 已提交
7129 7130 7131 7132 7133
	.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,
7134
	.get_cpl = svm_get_cpl,
7135
	.get_cs_db_l_bits = kvm_get_cs_db_l_bits,
7136
	.decache_cr0_guest_bits = svm_decache_cr0_guest_bits,
7137
	.decache_cr3 = svm_decache_cr3,
7138
	.decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
A
Avi Kivity 已提交
7139 7140 7141 7142 7143 7144 7145 7146
	.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
7147 7148
	.get_dr6 = svm_get_dr6,
	.set_dr6 = svm_set_dr6,
7149
	.set_dr7 = svm_set_dr7,
7150
	.sync_dirty_debug_regs = svm_sync_dirty_debug_regs,
A
Avi Kivity 已提交
7151
	.cache_reg = svm_cache_reg,
A
Avi Kivity 已提交
7152 7153
	.get_rflags = svm_get_rflags,
	.set_rflags = svm_set_rflags,
7154

A
Avi Kivity 已提交
7155
	.tlb_flush = svm_flush_tlb,
7156
	.tlb_flush_gva = svm_flush_tlb_gva,
A
Avi Kivity 已提交
7157 7158

	.run = svm_vcpu_run,
7159
	.handle_exit = handle_exit,
A
Avi Kivity 已提交
7160
	.skip_emulated_instruction = skip_emulated_instruction,
7161 7162
	.set_interrupt_shadow = svm_set_interrupt_shadow,
	.get_interrupt_shadow = svm_get_interrupt_shadow,
I
Ingo Molnar 已提交
7163
	.patch_hypercall = svm_patch_hypercall,
E
Eddie Dong 已提交
7164
	.set_irq = svm_set_irq,
7165
	.set_nmi = svm_inject_nmi,
7166
	.queue_exception = svm_queue_exception,
A
Avi Kivity 已提交
7167
	.cancel_injection = svm_cancel_injection,
7168
	.interrupt_allowed = svm_interrupt_allowed,
7169
	.nmi_allowed = svm_nmi_allowed,
J
Jan Kiszka 已提交
7170 7171
	.get_nmi_mask = svm_get_nmi_mask,
	.set_nmi_mask = svm_set_nmi_mask,
7172 7173 7174
	.enable_nmi_window = enable_nmi_window,
	.enable_irq_window = enable_irq_window,
	.update_cr8_intercept = update_cr8_intercept,
7175
	.set_virtual_apic_mode = svm_set_virtual_apic_mode,
7176 7177
	.get_enable_apicv = svm_get_enable_apicv,
	.refresh_apicv_exec_ctrl = svm_refresh_apicv_exec_ctrl,
7178
	.load_eoi_exitmap = svm_load_eoi_exitmap,
7179 7180
	.hwapic_irr_update = svm_hwapic_irr_update,
	.hwapic_isr_update = svm_hwapic_isr_update,
7181
	.sync_pir_to_irr = kvm_lapic_find_highest_irr,
7182
	.apicv_post_state_restore = avic_post_state_restore,
7183 7184

	.set_tss_addr = svm_set_tss_addr,
7185
	.set_identity_map_addr = svm_set_identity_map_addr,
7186
	.get_tdp_level = get_npt_level,
7187
	.get_mt_mask = svm_get_mt_mask,
7188

7189 7190
	.get_exit_info = svm_get_exit_info,

7191
	.get_lpage_level = svm_get_lpage_level,
7192 7193

	.cpuid_update = svm_cpuid_update,
7194 7195

	.rdtscp_supported = svm_rdtscp_supported,
7196
	.invpcid_supported = svm_invpcid_supported,
7197
	.mpx_supported = svm_mpx_supported,
7198
	.xsaves_supported = svm_xsaves_supported,
7199
	.umip_emulated = svm_umip_emulated,
7200
	.pt_supported = svm_pt_supported,
7201 7202

	.set_supported_cpuid = svm_set_supported_cpuid,
7203 7204

	.has_wbinvd_exit = svm_has_wbinvd_exit,
7205

7206
	.read_l1_tsc_offset = svm_read_l1_tsc_offset,
7207
	.write_l1_tsc_offset = svm_write_l1_tsc_offset,
7208 7209

	.set_tdp_cr3 = set_tdp_cr3,
7210 7211

	.check_intercept = svm_check_intercept,
7212
	.handle_external_intr = svm_handle_external_intr,
7213

7214 7215
	.request_immediate_exit = __kvm_request_immediate_exit,

7216
	.sched_in = svm_sched_in,
7217 7218

	.pmu_ops = &amd_pmu_ops,
7219
	.deliver_posted_interrupt = svm_deliver_avic_intr,
7220
	.update_pi_irte = svm_update_pi_irte,
7221
	.setup_mce = svm_setup_mce,
7222

7223
	.smi_allowed = svm_smi_allowed,
7224 7225
	.pre_enter_smm = svm_pre_enter_smm,
	.pre_leave_smm = svm_pre_leave_smm,
7226
	.enable_smi_window = enable_smi_window,
B
Brijesh Singh 已提交
7227 7228

	.mem_enc_op = svm_mem_enc_op,
7229 7230
	.mem_enc_reg_region = svm_register_enc_region,
	.mem_enc_unreg_region = svm_unregister_enc_region,
7231 7232

	.nested_enable_evmcs = nested_enable_evmcs,
7233
	.nested_get_evmcs_version = nested_get_evmcs_version,
A
Avi Kivity 已提交
7234 7235 7236 7237
};

static int __init svm_init(void)
{
7238
	return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm),
7239
			__alignof__(struct vcpu_svm), THIS_MODULE);
A
Avi Kivity 已提交
7240 7241 7242 7243
}

static void __exit svm_exit(void)
{
7244
	kvm_exit();
A
Avi Kivity 已提交
7245 7246 7247 7248
}

module_init(svm_init)
module_exit(svm_exit)