svm.c 185.0 KB
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/*
 * Kernel-based Virtual Machine driver for Linux
 *
 * AMD SVM support
 *
 * Copyright (C) 2006 Qumranet, Inc.
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 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
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 *
 * Authors:
 *   Yaniv Kamay  <yaniv@qumranet.com>
 *   Avi Kivity   <avi@qumranet.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2.  See
 * the COPYING file in the top-level directory.
 *
 */
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#define pr_fmt(fmt) "SVM: " fmt

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#include <linux/kvm_host.h>

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

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

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

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#define IOPM_ALLOC_ORDER 2
#define MSRPM_ALLOC_ORDER 1

#define SEG_TYPE_LDT 2
#define SEG_TYPE_BUSY_TSS16 3

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

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

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#define DEBUGCTL_RESERVED_BITS (~(0x3fULL))

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

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

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

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

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

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static bool erratum_383_found __read_mostly;

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

#define NR_HOST_SAVE_USER_MSRS ARRAY_SIZE(host_save_user_msrs)

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

struct kvm_svm {
	struct kvm kvm;

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

	struct kvm_sev_info sev_info;
};

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struct kvm_vcpu;

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

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

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

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

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

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

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

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

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	u64 next_rip;

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

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	ulong nmi_iret_rip;

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

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

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#define AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK	(0xFF)
#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

	/* 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)
1798 1799
		pages = __vmalloc(size, GFP_KERNEL_ACCOUNT | __GFP_ZERO,
				  PAGE_KERNEL);
1800
	else
1801
		pages = kmalloc(size, GFP_KERNEL_ACCOUNT);
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 1828

	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)
{
1829
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850

	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);
	}
}

1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866
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);
}

1867 1868
static struct kvm *svm_vm_alloc(void)
{
1869 1870 1871
	struct kvm_svm *kvm_svm = __vmalloc(sizeof(struct kvm_svm),
					    GFP_KERNEL_ACCOUNT | __GFP_ZERO,
					    PAGE_KERNEL);
1872
	return &kvm_svm->kvm;
1873 1874 1875 1876
}

static void svm_vm_free(struct kvm *kvm)
{
1877
	vfree(to_kvm_svm(kvm));
1878 1879
}

B
Brijesh Singh 已提交
1880 1881
static void sev_vm_destroy(struct kvm *kvm)
{
1882
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1883 1884
	struct list_head *head = &sev->regions_list;
	struct list_head *pos, *q;
1885

B
Brijesh Singh 已提交
1886 1887 1888
	if (!sev_guest(kvm))
		return;

1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903
	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);

1904
	sev_unbind_asid(kvm, sev->handle);
B
Brijesh Singh 已提交
1905 1906 1907
	sev_asid_free(kvm);
}

1908 1909
static void avic_vm_destroy(struct kvm *kvm)
{
1910
	unsigned long flags;
1911
	struct kvm_svm *kvm_svm = to_kvm_svm(kvm);
1912

1913 1914 1915
	if (!avic)
		return;

1916 1917 1918 1919
	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);
1920 1921

	spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
1922
	hash_del(&kvm_svm->hnode);
1923
	spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);
1924 1925
}

B
Brijesh Singh 已提交
1926 1927 1928 1929 1930 1931
static void svm_vm_destroy(struct kvm *kvm)
{
	avic_vm_destroy(kvm);
	sev_vm_destroy(kvm);
}

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

	if (!avic)
		return 0;

	/* Allocating physical APIC ID table (4KB) */
1946
	p_page = alloc_page(GFP_KERNEL_ACCOUNT);
1947 1948 1949
	if (!p_page)
		goto free_avic;

1950
	kvm_svm->avic_physical_id_table_page = p_page;
1951 1952 1953
	clear_page(page_address(p_page));

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

1958
	kvm_svm->avic_logical_id_table_page = l_page;
1959 1960
	clear_page(page_address(l_page));

1961
	spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
1962 1963 1964 1965 1966 1967 1968 1969
 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) {
1970 1971
		hash_for_each_possible(svm_vm_data_hash, k2, hnode, vm_id) {
			if (k2->avic_vm_id == vm_id)
1972 1973 1974
				goto again;
		}
	}
1975 1976
	kvm_svm->avic_vm_id = vm_id;
	hash_add(svm_vm_data_hash, &kvm_svm->hnode, kvm_svm->avic_vm_id);
1977 1978
	spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);

1979 1980 1981 1982 1983
	return 0;

free_avic:
	avic_vm_destroy(kvm);
	return err;
A
Avi Kivity 已提交
1984 1985
}

1986 1987
static inline int
avic_update_iommu_vcpu_affinity(struct kvm_vcpu *vcpu, int cpu, bool r)
1988
{
1989 1990 1991
	int ret = 0;
	unsigned long flags;
	struct amd_svm_iommu_ir *ir;
1992 1993
	struct vcpu_svm *svm = to_svm(vcpu);

1994 1995
	if (!kvm_arch_has_assigned_device(vcpu->kvm))
		return 0;
1996

1997 1998 1999 2000 2001
	/*
	 * 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);
2002

2003 2004
	if (list_empty(&svm->ir_list))
		goto out;
2005

2006 2007 2008 2009 2010 2011 2012 2013
	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;
2014 2015 2016 2017 2018 2019
}

static void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
	u64 entry;
	/* ID = 0xff (broadcast), ID > 0xff (reserved) */
2020
	int h_physical_id = kvm_cpu_get_apicid(cpu);
2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039
	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);
2040 2041
	avic_update_iommu_vcpu_affinity(vcpu, h_physical_id,
					svm->avic_is_running);
2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052
}

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));
2053 2054 2055
	if (entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK)
		avic_update_iommu_vcpu_affinity(vcpu, -1, 0);

2056 2057
	entry &= ~AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK;
	WRITE_ONCE(*(svm->avic_physical_id_cache), entry);
A
Avi Kivity 已提交
2058 2059
}

2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073
/**
 * 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);
}

2074
static void svm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event)
2075 2076
{
	struct vcpu_svm *svm = to_svm(vcpu);
2077 2078
	u32 dummy;
	u32 eax = 1;
2079

2080
	vcpu->arch.microcode_version = 0x01000065;
2081
	svm->spec_ctrl = 0;
2082
	svm->virt_spec_ctrl = 0;
2083

2084 2085 2086 2087 2088 2089
	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
2090
	init_vmcb(svm);
A
Avi Kivity 已提交
2091

2092
	kvm_cpuid(vcpu, &eax, &dummy, &dummy, &dummy, true);
2093
	kvm_register_write(vcpu, VCPU_REGS_RDX, eax);
2094 2095 2096

	if (kvm_vcpu_apicv_active(vcpu) && !init_event)
		avic_update_vapic_bar(svm, APIC_DEFAULT_PHYS_BASE);
2097 2098
}

2099 2100 2101 2102
static int avic_init_vcpu(struct vcpu_svm *svm)
{
	int ret;

2103
	if (!kvm_vcpu_apicv_active(&svm->vcpu))
2104 2105 2106 2107 2108 2109 2110 2111
		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);
2112
	svm->dfr_reg = APIC_DFR_FLAT;
2113 2114 2115 2116

	return ret;
}

R
Rusty Russell 已提交
2117
static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
A
Avi Kivity 已提交
2118
{
2119
	struct vcpu_svm *svm;
A
Avi Kivity 已提交
2120
	struct page *page;
2121
	struct page *msrpm_pages;
A
Alexander Graf 已提交
2122
	struct page *hsave_page;
A
Alexander Graf 已提交
2123
	struct page *nested_msrpm_pages;
R
Rusty Russell 已提交
2124
	int err;
A
Avi Kivity 已提交
2125

2126
	svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL_ACCOUNT);
R
Rusty Russell 已提交
2127 2128 2129 2130 2131
	if (!svm) {
		err = -ENOMEM;
		goto out;
	}

2132 2133
	svm->vcpu.arch.guest_fpu = kmem_cache_zalloc(x86_fpu_cache,
						     GFP_KERNEL_ACCOUNT);
2134 2135 2136 2137 2138 2139
	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
2140 2141 2142 2143
	err = kvm_vcpu_init(&svm->vcpu, kvm, id);
	if (err)
		goto free_svm;

2144
	err = -ENOMEM;
2145
	page = alloc_page(GFP_KERNEL_ACCOUNT);
2146
	if (!page)
R
Rusty Russell 已提交
2147
		goto uninit;
A
Avi Kivity 已提交
2148

2149
	msrpm_pages = alloc_pages(GFP_KERNEL_ACCOUNT, MSRPM_ALLOC_ORDER);
2150
	if (!msrpm_pages)
2151
		goto free_page1;
A
Alexander Graf 已提交
2152

2153
	nested_msrpm_pages = alloc_pages(GFP_KERNEL_ACCOUNT, MSRPM_ALLOC_ORDER);
A
Alexander Graf 已提交
2154
	if (!nested_msrpm_pages)
2155
		goto free_page2;
2156

2157
	hsave_page = alloc_page(GFP_KERNEL_ACCOUNT);
A
Alexander Graf 已提交
2158
	if (!hsave_page)
2159 2160
		goto free_page3;

2161 2162 2163
	err = avic_init_vcpu(svm);
	if (err)
		goto free_page4;
2164

2165 2166 2167 2168 2169
	/* 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;

2170
	svm->nested.hsave = page_address(hsave_page);
A
Alexander Graf 已提交
2171

2172 2173 2174
	svm->msrpm = page_address(msrpm_pages);
	svm_vcpu_init_msrpm(svm->msrpm);

2175
	svm->nested.msrpm = page_address(nested_msrpm_pages);
2176
	svm_vcpu_init_msrpm(svm->nested.msrpm);
A
Alexander Graf 已提交
2177

2178 2179
	svm->vmcb = page_address(page);
	clear_page(svm->vmcb);
2180
	svm->vmcb_pa = __sme_set(page_to_pfn(page) << PAGE_SHIFT);
2181
	svm->asid_generation = 0;
P
Paolo Bonzini 已提交
2182
	init_vmcb(svm);
A
Avi Kivity 已提交
2183

2184 2185
	svm_init_osvw(&svm->vcpu);

R
Rusty Russell 已提交
2186
	return &svm->vcpu;
2187

2188 2189
free_page4:
	__free_page(hsave_page);
2190 2191 2192 2193 2194 2195
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
2196 2197 2198
uninit:
	kvm_vcpu_uninit(&svm->vcpu);
free_svm:
2199 2200
	kmem_cache_free(x86_fpu_cache, svm->vcpu.arch.guest_fpu);
free_partial_svm:
2201
	kmem_cache_free(kvm_vcpu_cache, svm);
R
Rusty Russell 已提交
2202 2203
out:
	return ERR_PTR(err);
A
Avi Kivity 已提交
2204 2205
}

2206 2207 2208 2209 2210 2211 2212 2213
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
2214 2215
static void svm_free_vcpu(struct kvm_vcpu *vcpu)
{
2216 2217
	struct vcpu_svm *svm = to_svm(vcpu);

2218 2219 2220 2221 2222 2223 2224
	/*
	 * 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);

2225
	__free_page(pfn_to_page(__sme_clr(svm->vmcb_pa) >> PAGE_SHIFT));
2226
	__free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER);
2227 2228
	__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
2229
	kvm_vcpu_uninit(vcpu);
2230
	kmem_cache_free(x86_fpu_cache, svm->vcpu.arch.guest_fpu);
2231
	kmem_cache_free(kvm_vcpu_cache, svm);
A
Avi Kivity 已提交
2232 2233
}

2234
static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
A
Avi Kivity 已提交
2235
{
2236
	struct vcpu_svm *svm = to_svm(vcpu);
A
Ashok Raj 已提交
2237
	struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
2238
	int i;
2239 2240

	if (unlikely(cpu != vcpu->cpu)) {
2241
		svm->asid_generation = 0;
2242
		mark_all_dirty(svm->vmcb);
2243
	}
2244

2245 2246 2247
#ifdef CONFIG_X86_64
	rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host.gs_base);
#endif
2248 2249 2250 2251
	savesegment(fs, svm->host.fs);
	savesegment(gs, svm->host.gs);
	svm->host.ldt = kvm_read_ldt();

2252
	for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
2253
		rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
2254

2255 2256 2257 2258 2259 2260
	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);
		}
2261
	}
P
Paolo Bonzini 已提交
2262 2263 2264
	/* This assumes that the kernel never uses MSR_TSC_AUX */
	if (static_cpu_has(X86_FEATURE_RDTSCP))
		wrmsrl(MSR_TSC_AUX, svm->tsc_aux);
2265

A
Ashok Raj 已提交
2266 2267 2268 2269
	if (sd->current_vmcb != svm->vmcb) {
		sd->current_vmcb = svm->vmcb;
		indirect_branch_prediction_barrier();
	}
2270
	avic_vcpu_load(vcpu, cpu);
A
Avi Kivity 已提交
2271 2272 2273 2274
}

static void svm_vcpu_put(struct kvm_vcpu *vcpu)
{
2275
	struct vcpu_svm *svm = to_svm(vcpu);
2276 2277
	int i;

2278 2279
	avic_vcpu_put(vcpu);

2280
	++vcpu->stat.host_state_reload;
2281 2282 2283
	kvm_load_ldt(svm->host.ldt);
#ifdef CONFIG_X86_64
	loadsegment(fs, svm->host.fs);
2284
	wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gsbase);
2285
	load_gs_index(svm->host.gs);
2286
#else
2287
#ifdef CONFIG_X86_32_LAZY_GS
2288
	loadsegment(gs, svm->host.gs);
2289
#endif
2290
#endif
2291
	for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
2292
		wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
A
Avi Kivity 已提交
2293 2294
}

2295 2296 2297 2298 2299 2300 2301 2302 2303 2304
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
2305 2306
static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
{
2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317
	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
2318 2319 2320 2321
}

static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
{
2322 2323 2324
	if (to_svm(vcpu)->nmi_singlestep)
		rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);

P
Paolo Bonzini 已提交
2325
       /*
A
Andrea Gelmini 已提交
2326
        * Any change of EFLAGS.VM is accompanied by a reload of SS
P
Paolo Bonzini 已提交
2327 2328 2329
        * (caused by either a task switch or an inter-privilege IRET),
        * so we do not need to update the CPL here.
        */
2330
	to_svm(vcpu)->vmcb->save.rflags = rflags;
A
Avi Kivity 已提交
2331 2332
}

A
Avi Kivity 已提交
2333 2334 2335 2336 2337
static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
{
	switch (reg) {
	case VCPU_EXREG_PDPTR:
		BUG_ON(!npt_enabled);
2338
		load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu));
A
Avi Kivity 已提交
2339 2340 2341 2342 2343 2344
		break;
	default:
		BUG();
	}
}

2345 2346
static void svm_set_vintr(struct vcpu_svm *svm)
{
2347
	set_intercept(svm, INTERCEPT_VINTR);
2348 2349 2350 2351
}

static void svm_clear_vintr(struct vcpu_svm *svm)
{
2352
	clr_intercept(svm, INTERCEPT_VINTR);
2353 2354
}

A
Avi Kivity 已提交
2355 2356
static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
{
2357
	struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
A
Avi Kivity 已提交
2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369

	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
2370
	return NULL;
A
Avi Kivity 已提交
2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394
}

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;
2395 2396 2397 2398 2399 2400 2401 2402 2403 2404

	/*
	 * 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;
2405

J
Joerg Roedel 已提交
2406 2407
	/*
	 * AMD's VMCB does not have an explicit unusable field, so emulate it
2408 2409
	 * for cross vendor migration purposes by "not present"
	 */
2410
	var->unusable = !var->present;
2411

2412 2413 2414 2415 2416 2417
	switch (seg) {
	case VCPU_SREG_TR:
		/*
		 * Work around a bug where the busy flag in the tr selector
		 * isn't exposed
		 */
2418
		var->type |= 0x2;
2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433
		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;
2434
	case VCPU_SREG_SS:
J
Joerg Roedel 已提交
2435 2436
		/*
		 * On AMD CPUs sometimes the DB bit in the segment
2437 2438 2439 2440 2441 2442
		 * 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;
2443
		/* This is symmetric with svm_set_segment() */
J
Jan Kiszka 已提交
2444
		var->dpl = to_svm(vcpu)->vmcb->save.cpl;
2445
		break;
2446
	}
A
Avi Kivity 已提交
2447 2448
}

2449 2450 2451 2452 2453 2454 2455
static int svm_get_cpl(struct kvm_vcpu *vcpu)
{
	struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;

	return save->cpl;
}

2456
static void svm_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2457
{
2458 2459
	struct vcpu_svm *svm = to_svm(vcpu);

2460 2461
	dt->size = svm->vmcb->save.idtr.limit;
	dt->address = svm->vmcb->save.idtr.base;
A
Avi Kivity 已提交
2462 2463
}

2464
static void svm_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2465
{
2466 2467
	struct vcpu_svm *svm = to_svm(vcpu);

2468 2469
	svm->vmcb->save.idtr.limit = dt->size;
	svm->vmcb->save.idtr.base = dt->address ;
2470
	mark_dirty(svm->vmcb, VMCB_DT);
A
Avi Kivity 已提交
2471 2472
}

2473
static void svm_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2474
{
2475 2476
	struct vcpu_svm *svm = to_svm(vcpu);

2477 2478
	dt->size = svm->vmcb->save.gdtr.limit;
	dt->address = svm->vmcb->save.gdtr.base;
A
Avi Kivity 已提交
2479 2480
}

2481
static void svm_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2482
{
2483 2484
	struct vcpu_svm *svm = to_svm(vcpu);

2485 2486
	svm->vmcb->save.gdtr.limit = dt->size;
	svm->vmcb->save.gdtr.base = dt->address ;
2487
	mark_dirty(svm->vmcb, VMCB_DT);
A
Avi Kivity 已提交
2488 2489
}

2490 2491 2492 2493
static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
{
}

2494 2495 2496 2497
static void svm_decache_cr3(struct kvm_vcpu *vcpu)
{
}

2498
static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
2499 2500 2501
{
}

A
Avi Kivity 已提交
2502 2503 2504 2505 2506
static void update_cr0_intercept(struct vcpu_svm *svm)
{
	ulong gcr0 = svm->vcpu.arch.cr0;
	u64 *hcr0 = &svm->vmcb->save.cr0;

2507 2508
	*hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK)
		| (gcr0 & SVM_CR0_SELECTIVE_MASK);
A
Avi Kivity 已提交
2509

2510
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
2511

2512
	if (gcr0 == *hcr0) {
2513 2514
		clr_cr_intercept(svm, INTERCEPT_CR0_READ);
		clr_cr_intercept(svm, INTERCEPT_CR0_WRITE);
A
Avi Kivity 已提交
2515
	} else {
2516 2517
		set_cr_intercept(svm, INTERCEPT_CR0_READ);
		set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
A
Avi Kivity 已提交
2518 2519 2520
	}
}

A
Avi Kivity 已提交
2521 2522
static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
{
2523 2524
	struct vcpu_svm *svm = to_svm(vcpu);

2525
#ifdef CONFIG_X86_64
2526
	if (vcpu->arch.efer & EFER_LME) {
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
		}

M
Mike Day 已提交
2532
		if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) {
2533
			vcpu->arch.efer &= ~EFER_LMA;
2534
			svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME);
A
Avi Kivity 已提交
2535 2536 2537
		}
	}
#endif
2538
	vcpu->arch.cr0 = cr0;
2539 2540 2541

	if (!npt_enabled)
		cr0 |= X86_CR0_PG | X86_CR0_WP;
2542

2543 2544 2545 2546 2547 2548 2549
	/*
	 * 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);
2550
	svm->vmcb->save.cr0 = cr0;
2551
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
2552
	update_cr0_intercept(svm);
A
Avi Kivity 已提交
2553 2554
}

2555
static int svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
A
Avi Kivity 已提交
2556
{
2557
	unsigned long host_cr4_mce = cr4_read_shadow() & X86_CR4_MCE;
2558 2559
	unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4;

2560 2561 2562
	if (cr4 & X86_CR4_VMXE)
		return 1;

2563
	if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE))
2564
		svm_flush_tlb(vcpu, true);
2565

2566 2567 2568
	vcpu->arch.cr4 = cr4;
	if (!npt_enabled)
		cr4 |= X86_CR4_PAE;
2569
	cr4 |= host_cr4_mce;
2570
	to_svm(vcpu)->vmcb->save.cr4 = cr4;
2571
	mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
2572
	return 0;
A
Avi Kivity 已提交
2573 2574 2575 2576 2577
}

static void svm_set_segment(struct kvm_vcpu *vcpu,
			    struct kvm_segment *var, int seg)
{
2578
	struct vcpu_svm *svm = to_svm(vcpu);
A
Avi Kivity 已提交
2579 2580 2581 2582 2583
	struct vmcb_seg *s = svm_seg(vcpu, seg);

	s->base = var->base;
	s->limit = var->limit;
	s->selector = var->selector;
2584 2585 2586 2587 2588 2589 2590 2591
	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
2592 2593 2594 2595 2596 2597 2598 2599

	/*
	 * 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)
2600 2601
		/* This is symmetric with svm_get_segment() */
		svm->vmcb->save.cpl = (var->dpl & 3);
A
Avi Kivity 已提交
2602

2603
	mark_dirty(svm->vmcb, VMCB_SEG);
A
Avi Kivity 已提交
2604 2605
}

2606
static void update_bp_intercept(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
2607
{
J
Jan Kiszka 已提交
2608 2609
	struct vcpu_svm *svm = to_svm(vcpu);

2610
	clr_exception_intercept(svm, BP_VECTOR);
2611

J
Jan Kiszka 已提交
2612 2613
	if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) {
		if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
2614
			set_exception_intercept(svm, BP_VECTOR);
J
Jan Kiszka 已提交
2615 2616
	} else
		vcpu->guest_debug = 0;
2617 2618
}

2619
static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd)
A
Avi Kivity 已提交
2620
{
2621 2622
	if (sd->next_asid > sd->max_asid) {
		++sd->asid_generation;
2623
		sd->next_asid = sd->min_asid;
2624
		svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
A
Avi Kivity 已提交
2625 2626
	}

2627 2628
	svm->asid_generation = sd->asid_generation;
	svm->vmcb->control.asid = sd->next_asid++;
2629 2630

	mark_dirty(svm->vmcb, VMCB_ASID);
A
Avi Kivity 已提交
2631 2632
}

J
Jan Kiszka 已提交
2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645
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);
}

2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660
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);
}

2661
static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value)
A
Avi Kivity 已提交
2662
{
2663 2664
	struct vcpu_svm *svm = to_svm(vcpu);

2665
	svm->vmcb->save.dr7 = value;
2666
	mark_dirty(svm->vmcb, VMCB_DR);
A
Avi Kivity 已提交
2667 2668
}

A
Avi Kivity 已提交
2669
static int pf_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2670
{
2671
	u64 fault_address = __sme_clr(svm->vmcb->control.exit_info_2);
2672
	u64 error_code = svm->vmcb->control.exit_info_1;
A
Avi Kivity 已提交
2673

2674
	return kvm_handle_page_fault(&svm->vcpu, error_code, fault_address,
2675 2676
			static_cpu_has(X86_FEATURE_DECODEASSISTS) ?
			svm->vmcb->control.insn_bytes : NULL,
2677 2678 2679 2680 2681
			svm->vmcb->control.insn_len);
}

static int npf_interception(struct vcpu_svm *svm)
{
2682
	u64 fault_address = __sme_clr(svm->vmcb->control.exit_info_2);
2683 2684 2685 2686
	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,
2687 2688
			static_cpu_has(X86_FEATURE_DECODEASSISTS) ?
			svm->vmcb->control.insn_bytes : NULL,
2689
			svm->vmcb->control.insn_len);
A
Avi Kivity 已提交
2690 2691
}

A
Avi Kivity 已提交
2692
static int db_interception(struct vcpu_svm *svm)
J
Jan Kiszka 已提交
2693
{
A
Avi Kivity 已提交
2694 2695
	struct kvm_run *kvm_run = svm->vcpu.run;

J
Jan Kiszka 已提交
2696
	if (!(svm->vcpu.guest_debug &
2697
	      (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) &&
J
Jan Kiszka 已提交
2698
		!svm->nmi_singlestep) {
J
Jan Kiszka 已提交
2699 2700 2701
		kvm_queue_exception(&svm->vcpu, DB_VECTOR);
		return 1;
	}
2702

J
Jan Kiszka 已提交
2703
	if (svm->nmi_singlestep) {
2704
		disable_nmi_singlestep(svm);
2705 2706 2707
	}

	if (svm->vcpu.guest_debug &
J
Joerg Roedel 已提交
2708
	    (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) {
2709 2710 2711 2712 2713 2714 2715 2716
		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
2717 2718
}

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

J
Jan Kiszka 已提交
2723 2724 2725 2726 2727 2728
	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
2729
static int ud_interception(struct vcpu_svm *svm)
2730
{
W
Wanpeng Li 已提交
2731
	return handle_ud(&svm->vcpu);
2732 2733
}

2734 2735 2736 2737 2738 2739
static int ac_interception(struct vcpu_svm *svm)
{
	kvm_queue_exception_e(&svm->vcpu, AC_VECTOR, 0);
	return 1;
}

2740 2741 2742 2743 2744 2745 2746 2747
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);

2748
	er = kvm_emulate_instruction(vcpu,
2749 2750 2751 2752 2753 2754 2755 2756
		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;
}

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 2791 2792 2793 2794 2795
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;
}

2796
static void svm_handle_mce(struct vcpu_svm *svm)
2797
{
2798 2799 2800 2801 2802 2803 2804
	if (is_erratum_383()) {
		/*
		 * Erratum 383 triggered. Guest state is corrupt so kill the
		 * guest.
		 */
		pr_err("KVM: Guest triggered AMD Erratum 383\n");

2805
		kvm_make_request(KVM_REQ_TRIPLE_FAULT, &svm->vcpu);
2806 2807 2808 2809

		return;
	}

2810 2811 2812 2813 2814 2815 2816 2817
	/*
	 * 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 */

2818 2819 2820 2821 2822
	return;
}

static int mc_interception(struct vcpu_svm *svm)
{
2823 2824 2825
	return 1;
}

A
Avi Kivity 已提交
2826
static int shutdown_interception(struct vcpu_svm *svm)
2827
{
A
Avi Kivity 已提交
2828 2829
	struct kvm_run *kvm_run = svm->vcpu.run;

2830 2831 2832 2833
	/*
	 * VMCB is undefined after a SHUTDOWN intercept
	 * so reinitialize it.
	 */
2834
	clear_page(svm->vmcb);
P
Paolo Bonzini 已提交
2835
	init_vmcb(svm);
2836 2837 2838 2839 2840

	kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
	return 0;
}

A
Avi Kivity 已提交
2841
static int io_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2842
{
2843
	struct kvm_vcpu *vcpu = &svm->vcpu;
M
Mike Day 已提交
2844
	u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */
2845
	int size, in, string;
2846
	unsigned port;
A
Avi Kivity 已提交
2847

R
Rusty Russell 已提交
2848
	++svm->vcpu.stat.io_exits;
2849
	string = (io_info & SVM_IOIO_STR_MASK) != 0;
2850
	in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
2851
	if (string)
2852
		return kvm_emulate_instruction(vcpu, 0) == EMULATE_DONE;
2853

2854 2855
	port = io_info >> 16;
	size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
2856 2857
	svm->next_rip = svm->vmcb->control.exit_info_2;

2858
	return kvm_fast_pio(&svm->vcpu, size, port, in);
A
Avi Kivity 已提交
2859 2860
}

A
Avi Kivity 已提交
2861
static int nmi_interception(struct vcpu_svm *svm)
2862 2863 2864 2865
{
	return 1;
}

A
Avi Kivity 已提交
2866
static int intr_interception(struct vcpu_svm *svm)
2867 2868 2869 2870 2871
{
	++svm->vcpu.stat.irq_exits;
	return 1;
}

A
Avi Kivity 已提交
2872
static int nop_on_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2873 2874 2875 2876
{
	return 1;
}

A
Avi Kivity 已提交
2877
static int halt_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2878
{
2879
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 1;
R
Rusty Russell 已提交
2880
	return kvm_emulate_halt(&svm->vcpu);
A
Avi Kivity 已提交
2881 2882
}

A
Avi Kivity 已提交
2883
static int vmmcall_interception(struct vcpu_svm *svm)
2884
{
2885
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2886
	return kvm_emulate_hypercall(&svm->vcpu);
2887 2888
}

2889 2890 2891 2892 2893 2894 2895
static unsigned long nested_svm_get_tdp_cr3(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	return svm->nested.nested_cr3;
}

2896 2897 2898 2899 2900 2901 2902
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;

2903
	ret = kvm_vcpu_read_guest_page(vcpu, gpa_to_gfn(__sme_clr(cr3)), &pdpte,
2904
				       offset_in_page(cr3) + index * 8, 8);
2905 2906 2907 2908 2909
	if (ret)
		return 0;
	return pdpte;
}

2910 2911 2912 2913 2914
static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu,
				   unsigned long root)
{
	struct vcpu_svm *svm = to_svm(vcpu);

2915
	svm->vmcb->control.nested_cr3 = __sme_set(root);
2916
	mark_dirty(svm->vmcb, VMCB_NPT);
2917 2918
}

2919 2920
static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu,
				       struct x86_exception *fault)
2921 2922 2923
{
	struct vcpu_svm *svm = to_svm(vcpu);

2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943
	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;
2944 2945 2946 2947

	nested_svm_vmexit(svm);
}

2948
static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu)
2949
{
2950
	WARN_ON(mmu_is_nested(vcpu));
2951 2952

	vcpu->arch.mmu = &vcpu->arch.guest_mmu;
2953
	kvm_init_shadow_mmu(vcpu);
2954 2955 2956 2957 2958 2959
	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);
2960 2961 2962 2963 2964
	vcpu->arch.walk_mmu              = &vcpu->arch.nested_mmu;
}

static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu)
{
2965
	vcpu->arch.mmu = &vcpu->arch.root_mmu;
2966
	vcpu->arch.walk_mmu = &vcpu->arch.root_mmu;
2967 2968
}

2969 2970
static int nested_svm_check_permissions(struct vcpu_svm *svm)
{
2971 2972
	if (!(svm->vcpu.arch.efer & EFER_SVME) ||
	    !is_paging(&svm->vcpu)) {
2973 2974 2975 2976 2977 2978 2979 2980 2981
		kvm_queue_exception(&svm->vcpu, UD_VECTOR);
		return 1;
	}

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

2982
	return 0;
2983 2984
}

2985 2986 2987
static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
				      bool has_error_code, u32 error_code)
{
2988 2989
	int vmexit;

2990
	if (!is_guest_mode(&svm->vcpu))
2991
		return 0;
2992

2993 2994 2995 2996
	vmexit = nested_svm_intercept(svm);
	if (vmexit != NESTED_EXIT_DONE)
		return 0;

2997 2998 2999
	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;
3000 3001

	/*
3002 3003
	 * EXITINFO2 is undefined for all exception intercepts other
	 * than #PF.
3004
	 */
3005 3006
	if (svm->vcpu.arch.exception.nested_apf)
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.apf.nested_apf_token;
3007 3008
	else if (svm->vcpu.arch.exception.has_payload)
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.exception.payload;
3009 3010
	else
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2;
3011

3012
	svm->nested.exit_required = true;
3013
	return vmexit;
3014 3015
}

3016 3017
/* This function returns true if it is save to enable the irq window */
static inline bool nested_svm_intr(struct vcpu_svm *svm)
3018
{
3019
	if (!is_guest_mode(&svm->vcpu))
3020
		return true;
3021

3022
	if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
3023
		return true;
3024

3025
	if (!(svm->vcpu.arch.hflags & HF_HIF_MASK))
3026
		return false;
3027

3028 3029 3030 3031 3032 3033 3034 3035
	/*
	 * 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;

3036 3037 3038
	svm->vmcb->control.exit_code   = SVM_EXIT_INTR;
	svm->vmcb->control.exit_info_1 = 0;
	svm->vmcb->control.exit_info_2 = 0;
3039

3040 3041 3042
	if (svm->nested.intercept & 1ULL) {
		/*
		 * The #vmexit can't be emulated here directly because this
G
Guo Chao 已提交
3043
		 * code path runs with irqs and preemption disabled. A
3044 3045 3046 3047
		 * #vmexit emulation might sleep. Only signal request for
		 * the #vmexit here.
		 */
		svm->nested.exit_required = true;
3048
		trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip);
3049
		return false;
3050 3051
	}

3052
	return true;
3053 3054
}

3055 3056 3057
/* This function returns true if it is save to enable the nmi window */
static inline bool nested_svm_nmi(struct vcpu_svm *svm)
{
3058
	if (!is_guest_mode(&svm->vcpu))
3059 3060 3061 3062 3063 3064 3065 3066 3067
		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;
3068 3069
}

3070
static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, struct page **_page)
3071 3072 3073
{
	struct page *page;

3074 3075
	might_sleep();

3076
	page = kvm_vcpu_gfn_to_page(&svm->vcpu, gpa >> PAGE_SHIFT);
3077 3078 3079
	if (is_error_page(page))
		goto error;

3080 3081 3082
	*_page = page;

	return kmap(page);
3083 3084 3085 3086 3087 3088 3089

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

	return NULL;
}

3090
static void nested_svm_unmap(struct page *page)
3091
{
3092
	kunmap(page);
3093 3094 3095
	kvm_release_page_dirty(page);
}

3096 3097
static int nested_svm_intercept_ioio(struct vcpu_svm *svm)
{
3098 3099 3100
	unsigned port, size, iopm_len;
	u16 val, mask;
	u8 start_bit;
3101
	u64 gpa;
3102

3103 3104
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_IOIO_PROT)))
		return NESTED_EXIT_HOST;
3105

3106
	port = svm->vmcb->control.exit_info_1 >> 16;
3107 3108
	size = (svm->vmcb->control.exit_info_1 & SVM_IOIO_SIZE_MASK) >>
		SVM_IOIO_SIZE_SHIFT;
3109
	gpa  = svm->nested.vmcb_iopm + (port / 8);
3110 3111 3112 3113
	start_bit = port % 8;
	iopm_len = (start_bit + size > 8) ? 2 : 1;
	mask = (0xf >> (4 - size)) << start_bit;
	val = 0;
3114

3115
	if (kvm_vcpu_read_guest(&svm->vcpu, gpa, &val, iopm_len))
3116
		return NESTED_EXIT_DONE;
3117

3118
	return (val & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
3119 3120
}

3121
static int nested_svm_exit_handled_msr(struct vcpu_svm *svm)
3122
{
3123 3124
	u32 offset, msr, value;
	int write, mask;
3125

3126
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
3127
		return NESTED_EXIT_HOST;
3128

3129 3130 3131 3132
	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);
3133

3134 3135
	if (offset == MSR_INVALID)
		return NESTED_EXIT_DONE;
3136

3137 3138
	/* Offset is in 32 bit units but need in 8 bit units */
	offset *= 4;
3139

3140
	if (kvm_vcpu_read_guest(&svm->vcpu, svm->nested.vmcb_msrpm + offset, &value, 4))
3141
		return NESTED_EXIT_DONE;
3142

3143
	return (value & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
3144 3145
}

3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170
/* 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;
}

3171
static int nested_svm_exit_special(struct vcpu_svm *svm)
3172 3173
{
	u32 exit_code = svm->vmcb->control.exit_code;
3174

3175 3176 3177
	switch (exit_code) {
	case SVM_EXIT_INTR:
	case SVM_EXIT_NMI:
3178
	case SVM_EXIT_EXCP_BASE + MC_VECTOR:
3179 3180
		return NESTED_EXIT_HOST;
	case SVM_EXIT_NPF:
J
Joerg Roedel 已提交
3181
		/* For now we are always handling NPFs when using them */
3182 3183 3184 3185
		if (npt_enabled)
			return NESTED_EXIT_HOST;
		break;
	case SVM_EXIT_EXCP_BASE + PF_VECTOR:
G
Gleb Natapov 已提交
3186
		/* When we're shadowing, trap PFs, but not async PF */
3187
		if (!npt_enabled && svm->vcpu.arch.apf.host_apf_reason == 0)
3188 3189 3190 3191
			return NESTED_EXIT_HOST;
		break;
	default:
		break;
3192 3193
	}

3194 3195 3196 3197 3198 3199
	return NESTED_EXIT_CONTINUE;
}

/*
 * If this function returns true, this #vmexit was already handled
 */
3200
static int nested_svm_intercept(struct vcpu_svm *svm)
3201 3202 3203 3204
{
	u32 exit_code = svm->vmcb->control.exit_code;
	int vmexit = NESTED_EXIT_HOST;

3205
	switch (exit_code) {
3206
	case SVM_EXIT_MSR:
3207
		vmexit = nested_svm_exit_handled_msr(svm);
3208
		break;
3209 3210 3211
	case SVM_EXIT_IOIO:
		vmexit = nested_svm_intercept_ioio(svm);
		break;
3212 3213 3214
	case SVM_EXIT_READ_CR0 ... SVM_EXIT_WRITE_CR8: {
		u32 bit = 1U << (exit_code - SVM_EXIT_READ_CR0);
		if (svm->nested.intercept_cr & bit)
3215
			vmexit = NESTED_EXIT_DONE;
3216 3217
		break;
	}
3218 3219 3220
	case SVM_EXIT_READ_DR0 ... SVM_EXIT_WRITE_DR7: {
		u32 bit = 1U << (exit_code - SVM_EXIT_READ_DR0);
		if (svm->nested.intercept_dr & bit)
3221
			vmexit = NESTED_EXIT_DONE;
3222 3223 3224 3225
		break;
	}
	case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: {
		u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE);
3226 3227 3228 3229 3230 3231
		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
3232 3233
		/* async page fault always cause vmexit */
		else if ((exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) &&
3234
			 svm->vcpu.arch.exception.nested_apf != 0)
G
Gleb Natapov 已提交
3235
			vmexit = NESTED_EXIT_DONE;
3236 3237
		break;
	}
3238 3239 3240 3241
	case SVM_EXIT_ERR: {
		vmexit = NESTED_EXIT_DONE;
		break;
	}
3242 3243
	default: {
		u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR);
J
Joerg Roedel 已提交
3244
		if (svm->nested.intercept & exit_bits)
3245
			vmexit = NESTED_EXIT_DONE;
3246 3247 3248
	}
	}

3249 3250 3251 3252 3253 3254 3255 3256 3257 3258
	return vmexit;
}

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

	vmexit = nested_svm_intercept(svm);

	if (vmexit == NESTED_EXIT_DONE)
3259 3260 3261
		nested_svm_vmexit(svm);

	return vmexit;
3262 3263
}

3264 3265 3266 3267 3268
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;

3269
	dst->intercept_cr         = from->intercept_cr;
3270
	dst->intercept_dr         = from->intercept_dr;
3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290
	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;
3291
	dst->virt_ext              = from->virt_ext;
3292 3293
	dst->pause_filter_count   = from->pause_filter_count;
	dst->pause_filter_thresh  = from->pause_filter_thresh;
3294 3295
}

3296
static int nested_svm_vmexit(struct vcpu_svm *svm)
3297
{
3298
	struct vmcb *nested_vmcb;
3299
	struct vmcb *hsave = svm->nested.hsave;
J
Joerg Roedel 已提交
3300
	struct vmcb *vmcb = svm->vmcb;
3301
	struct page *page;
3302

3303 3304 3305 3306
	trace_kvm_nested_vmexit_inject(vmcb->control.exit_code,
				       vmcb->control.exit_info_1,
				       vmcb->control.exit_info_2,
				       vmcb->control.exit_int_info,
3307 3308
				       vmcb->control.exit_int_info_err,
				       KVM_ISA_SVM);
3309

3310
	nested_vmcb = nested_svm_map(svm, svm->nested.vmcb, &page);
3311 3312 3313
	if (!nested_vmcb)
		return 1;

3314 3315
	/* Exit Guest-Mode */
	leave_guest_mode(&svm->vcpu);
3316 3317
	svm->nested.vmcb = 0;

3318
	/* Give the current vmcb to the guest */
J
Joerg Roedel 已提交
3319 3320 3321 3322 3323 3324 3325 3326
	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;
3327
	nested_vmcb->save.efer   = svm->vcpu.arch.efer;
3328
	nested_vmcb->save.cr0    = kvm_read_cr0(&svm->vcpu);
3329
	nested_vmcb->save.cr3    = kvm_read_cr3(&svm->vcpu);
J
Joerg Roedel 已提交
3330
	nested_vmcb->save.cr2    = vmcb->save.cr2;
3331
	nested_vmcb->save.cr4    = svm->vcpu.arch.cr4;
3332
	nested_vmcb->save.rflags = kvm_get_rflags(&svm->vcpu);
J
Joerg Roedel 已提交
3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348
	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;
3349 3350 3351

	if (svm->nrips_enabled)
		nested_vmcb->control.next_rip  = vmcb->control.next_rip;
3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367

	/*
	 * 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
3368 3369 3370
	nested_vmcb->control.tlb_ctl           = 0;
	nested_vmcb->control.event_inj         = 0;
	nested_vmcb->control.event_inj_err     = 0;
3371

3372 3373 3374 3375 3376
	nested_vmcb->control.pause_filter_count =
		svm->vmcb->control.pause_filter_count;
	nested_vmcb->control.pause_filter_thresh =
		svm->vmcb->control.pause_filter_thresh;

3377 3378 3379 3380 3381
	/* 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 */
3382
	copy_vmcb_control_area(vmcb, hsave);
3383

3384
	svm->vcpu.arch.tsc_offset = svm->vmcb->control.tsc_offset;
3385 3386
	kvm_clear_exception_queue(&svm->vcpu);
	kvm_clear_interrupt_queue(&svm->vcpu);
3387

3388 3389
	svm->nested.nested_cr3 = 0;

3390 3391 3392 3393 3394 3395 3396
	/* 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;
3397
	kvm_set_rflags(&svm->vcpu, hsave->save.rflags);
3398 3399 3400 3401 3402 3403 3404
	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 {
3405
		(void)kvm_set_cr3(&svm->vcpu, hsave->save.cr3);
3406 3407 3408 3409 3410 3411 3412 3413
	}
	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;

3414 3415
	mark_all_dirty(svm->vmcb);

3416
	nested_svm_unmap(page);
3417

3418
	nested_svm_uninit_mmu_context(&svm->vcpu);
3419 3420 3421
	kvm_mmu_reset_context(&svm->vcpu);
	kvm_mmu_load(&svm->vcpu);

3422 3423 3424 3425 3426 3427 3428 3429
	/*
	 * 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);

3430 3431
	return 0;
}
A
Alexander Graf 已提交
3432

3433
static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3434
{
3435 3436
	/*
	 * This function merges the msr permission bitmaps of kvm and the
G
Guo Chao 已提交
3437
	 * nested vmcb. It is optimized in that it only merges the parts where
3438 3439
	 * the kvm msr permission bitmap may contain zero bits
	 */
A
Alexander Graf 已提交
3440
	int i;
3441

3442 3443
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
		return true;
3444

3445 3446 3447
	for (i = 0; i < MSRPM_OFFSETS; i++) {
		u32 value, p;
		u64 offset;
3448

3449 3450
		if (msrpm_offsets[i] == 0xffffffff)
			break;
A
Alexander Graf 已提交
3451

3452 3453
		p      = msrpm_offsets[i];
		offset = svm->nested.vmcb_msrpm + (p * 4);
3454

3455
		if (kvm_vcpu_read_guest(&svm->vcpu, offset, &value, 4))
3456 3457 3458 3459
			return false;

		svm->nested.msrpm[p] = svm->msrpm[p] | value;
	}
A
Alexander Graf 已提交
3460

3461
	svm->vmcb->control.msrpm_base_pa = __sme_set(__pa(svm->nested.msrpm));
3462 3463

	return true;
A
Alexander Graf 已提交
3464 3465
}

3466 3467 3468 3469 3470
static bool nested_vmcb_checks(struct vmcb *vmcb)
{
	if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0)
		return false;

3471 3472 3473
	if (vmcb->control.asid == 0)
		return false;

3474 3475
	if ((vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) &&
	    !npt_enabled)
3476 3477
		return false;

3478 3479 3480
	return true;
}

L
Ladi Prosek 已提交
3481 3482
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
3483
{
3484
	if (kvm_get_rflags(&svm->vcpu) & X86_EFLAGS_IF)
A
Alexander Graf 已提交
3485 3486 3487 3488
		svm->vcpu.arch.hflags |= HF_HIF_MASK;
	else
		svm->vcpu.arch.hflags &= ~HF_HIF_MASK;

3489
	if (nested_vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) {
3490 3491 3492 3493
		svm->nested.nested_cr3 = nested_vmcb->control.nested_cr3;
		nested_svm_init_mmu_context(&svm->vcpu);
	}

A
Alexander Graf 已提交
3494 3495 3496 3497 3498 3499 3500
	/* 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;
3501
	kvm_set_rflags(&svm->vcpu, nested_vmcb->save.rflags);
A
Alexander Graf 已提交
3502 3503 3504 3505 3506 3507
	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;
3508
	} else
3509
		(void)kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3);
3510 3511 3512 3513

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

J
Joerg Roedel 已提交
3514
	svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2;
A
Alexander Graf 已提交
3515 3516 3517
	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
3518

A
Alexander Graf 已提交
3519 3520 3521 3522 3523 3524 3525 3526
	/* 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;

3527
	svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa & ~0x0fffULL;
3528
	svm->nested.vmcb_iopm  = nested_vmcb->control.iopm_base_pa  & ~0x0fffULL;
A
Alexander Graf 已提交
3529

J
Joerg Roedel 已提交
3530
	/* cache intercepts */
3531
	svm->nested.intercept_cr         = nested_vmcb->control.intercept_cr;
3532
	svm->nested.intercept_dr         = nested_vmcb->control.intercept_dr;
J
Joerg Roedel 已提交
3533 3534 3535
	svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions;
	svm->nested.intercept            = nested_vmcb->control.intercept;

3536
	svm_flush_tlb(&svm->vcpu, true);
A
Alexander Graf 已提交
3537 3538 3539 3540 3541 3542
	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;

3543 3544
	if (svm->vcpu.arch.hflags & HF_VINTR_MASK) {
		/* We only want the cr8 intercept bits of the guest */
3545 3546
		clr_cr_intercept(svm, INTERCEPT_CR8_READ);
		clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
3547 3548
	}

3549
	/* We don't want to see VMMCALLs from a nested guest */
3550
	clr_intercept(svm, INTERCEPT_VMMCALL);
3551

3552 3553 3554
	svm->vcpu.arch.tsc_offset += nested_vmcb->control.tsc_offset;
	svm->vmcb->control.tsc_offset = svm->vcpu.arch.tsc_offset;

3555
	svm->vmcb->control.virt_ext = nested_vmcb->control.virt_ext;
A
Alexander Graf 已提交
3556 3557 3558 3559 3560
	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;

3561 3562 3563 3564 3565
	svm->vmcb->control.pause_filter_count =
		nested_vmcb->control.pause_filter_count;
	svm->vmcb->control.pause_filter_thresh =
		nested_vmcb->control.pause_filter_thresh;

3566
	nested_svm_unmap(page);
3567

3568 3569 3570
	/* Enter Guest-Mode */
	enter_guest_mode(&svm->vcpu);

3571 3572 3573 3574 3575 3576
	/*
	 * Merge guest and host intercepts - must be called  with vcpu in
	 * guest-mode to take affect here
	 */
	recalc_intercepts(svm);

3577
	svm->nested.vmcb = vmcb_gpa;
3578

3579
	enable_gif(svm);
A
Alexander Graf 已提交
3580

3581
	mark_all_dirty(svm->vmcb);
L
Ladi Prosek 已提交
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 3644 3645 3646 3647 3648
}

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);
3649

3650
	return true;
A
Alexander Graf 已提交
3651 3652
}

3653
static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668
{
	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
3669
static int vmload_interception(struct vcpu_svm *svm)
3670
{
3671
	struct vmcb *nested_vmcb;
3672
	struct page *page;
3673
	int ret;
3674

3675 3676 3677
	if (nested_svm_check_permissions(svm))
		return 1;

3678
	nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
3679 3680 3681
	if (!nested_vmcb)
		return 1;

3682
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3683
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3684

3685
	nested_svm_vmloadsave(nested_vmcb, svm->vmcb);
3686
	nested_svm_unmap(page);
3687

3688
	return ret;
3689 3690
}

A
Avi Kivity 已提交
3691
static int vmsave_interception(struct vcpu_svm *svm)
3692
{
3693
	struct vmcb *nested_vmcb;
3694
	struct page *page;
3695
	int ret;
3696

3697 3698 3699
	if (nested_svm_check_permissions(svm))
		return 1;

3700
	nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
3701 3702 3703
	if (!nested_vmcb)
		return 1;

3704
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3705
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3706

3707
	nested_svm_vmloadsave(svm->vmcb, nested_vmcb);
3708
	nested_svm_unmap(page);
3709

3710
	return ret;
3711 3712
}

A
Avi Kivity 已提交
3713
static int vmrun_interception(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3714 3715 3716 3717
{
	if (nested_svm_check_permissions(svm))
		return 1;

3718 3719
	/* Save rip after vmrun instruction */
	kvm_rip_write(&svm->vcpu, kvm_rip_read(&svm->vcpu) + 3);
A
Alexander Graf 已提交
3720

3721
	if (!nested_svm_vmrun(svm))
A
Alexander Graf 已提交
3722 3723
		return 1;

3724
	if (!nested_svm_vmrun_msrpm(svm))
3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736
		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
3737 3738 3739 3740

	return 1;
}

A
Avi Kivity 已提交
3741
static int stgi_interception(struct vcpu_svm *svm)
3742
{
3743 3744
	int ret;

3745 3746 3747
	if (nested_svm_check_permissions(svm))
		return 1;

3748 3749
	/*
	 * If VGIF is enabled, the STGI intercept is only added to
3750
	 * detect the opening of the SMI/NMI window; remove it now.
3751 3752 3753 3754
	 */
	if (vgif_enabled(svm))
		clr_intercept(svm, INTERCEPT_STGI);

3755
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3756
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3757
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3758

3759
	enable_gif(svm);
3760

3761
	return ret;
3762 3763
}

A
Avi Kivity 已提交
3764
static int clgi_interception(struct vcpu_svm *svm)
3765
{
3766 3767
	int ret;

3768 3769 3770 3771
	if (nested_svm_check_permissions(svm))
		return 1;

	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3772
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3773

3774
	disable_gif(svm);
3775 3776

	/* After a CLGI no interrupts should come */
3777 3778 3779 3780 3781
	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);
	}
3782

3783
	return ret;
3784 3785
}

A
Avi Kivity 已提交
3786
static int invlpga_interception(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3787 3788 3789
{
	struct kvm_vcpu *vcpu = &svm->vcpu;

3790 3791
	trace_kvm_invlpga(svm->vmcb->save.rip, kvm_register_read(&svm->vcpu, VCPU_REGS_RCX),
			  kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
3792

A
Alexander Graf 已提交
3793
	/* Let's treat INVLPGA the same as INVLPG (can be optimized!) */
3794
	kvm_mmu_invlpg(vcpu, kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
A
Alexander Graf 已提交
3795 3796

	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3797
	return kvm_skip_emulated_instruction(&svm->vcpu);
A
Alexander Graf 已提交
3798 3799
}

3800 3801
static int skinit_interception(struct vcpu_svm *svm)
{
3802
	trace_kvm_skinit(svm->vmcb->save.rip, kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
3803 3804 3805 3806 3807

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

D
David Kaplan 已提交
3808 3809
static int wbinvd_interception(struct vcpu_svm *svm)
{
3810
	return kvm_emulate_wbinvd(&svm->vcpu);
D
David Kaplan 已提交
3811 3812
}

J
Joerg Roedel 已提交
3813 3814 3815 3816 3817 3818 3819
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;
3820
		return kvm_skip_emulated_instruction(&svm->vcpu);
J
Joerg Roedel 已提交
3821 3822 3823 3824 3825
	}

	return 1;
}

A
Avi Kivity 已提交
3826
static int task_switch_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3827
{
3828
	u16 tss_selector;
3829 3830 3831
	int reason;
	int int_type = svm->vmcb->control.exit_int_info &
		SVM_EXITINTINFO_TYPE_MASK;
3832
	int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK;
3833 3834 3835 3836
	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;
3837 3838
	bool has_error_code = false;
	u32 error_code = 0;
3839 3840

	tss_selector = (u16)svm->vmcb->control.exit_info_1;
3841

3842 3843
	if (svm->vmcb->control.exit_info_2 &
	    (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET))
3844 3845 3846 3847
		reason = TASK_SWITCH_IRET;
	else if (svm->vmcb->control.exit_info_2 &
		 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP))
		reason = TASK_SWITCH_JMP;
3848
	else if (idt_v)
3849 3850 3851 3852
		reason = TASK_SWITCH_GATE;
	else
		reason = TASK_SWITCH_CALL;

3853 3854 3855 3856 3857 3858
	if (reason == TASK_SWITCH_GATE) {
		switch (type) {
		case SVM_EXITINTINFO_TYPE_NMI:
			svm->vcpu.arch.nmi_injected = false;
			break;
		case SVM_EXITINTINFO_TYPE_EXEPT:
3859 3860 3861 3862 3863 3864
			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;
			}
3865 3866 3867 3868 3869 3870 3871 3872 3873
			kvm_clear_exception_queue(&svm->vcpu);
			break;
		case SVM_EXITINTINFO_TYPE_INTR:
			kvm_clear_interrupt_queue(&svm->vcpu);
			break;
		default:
			break;
		}
	}
3874

3875 3876 3877
	if (reason != TASK_SWITCH_GATE ||
	    int_type == SVM_EXITINTINFO_TYPE_SOFT ||
	    (int_type == SVM_EXITINTINFO_TYPE_EXEPT &&
3878 3879
	     (int_vec == OF_VECTOR || int_vec == BP_VECTOR)))
		skip_emulated_instruction(&svm->vcpu);
3880

3881 3882 3883 3884
	if (int_type != SVM_EXITINTINFO_TYPE_SOFT)
		int_vec = -1;

	if (kvm_task_switch(&svm->vcpu, tss_selector, int_vec, reason,
3885 3886 3887 3888 3889 3890 3891
				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
3892 3893
}

A
Avi Kivity 已提交
3894
static int cpuid_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3895
{
3896
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
3897
	return kvm_emulate_cpuid(&svm->vcpu);
A
Avi Kivity 已提交
3898 3899
}

A
Avi Kivity 已提交
3900
static int iret_interception(struct vcpu_svm *svm)
3901 3902
{
	++svm->vcpu.stat.nmi_window_exits;
3903
	clr_intercept(svm, INTERCEPT_IRET);
3904
	svm->vcpu.arch.hflags |= HF_IRET_MASK;
3905
	svm->nmi_iret_rip = kvm_rip_read(&svm->vcpu);
3906
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3907 3908 3909
	return 1;
}

A
Avi Kivity 已提交
3910
static int invlpg_interception(struct vcpu_svm *svm)
M
Marcelo Tosatti 已提交
3911
{
3912
	if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
3913
		return kvm_emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
3914 3915

	kvm_mmu_invlpg(&svm->vcpu, svm->vmcb->control.exit_info_1);
3916
	return kvm_skip_emulated_instruction(&svm->vcpu);
M
Marcelo Tosatti 已提交
3917 3918
}

A
Avi Kivity 已提交
3919
static int emulate_on_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3920
{
3921
	return kvm_emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
A
Avi Kivity 已提交
3922 3923
}

B
Brijesh Singh 已提交
3924 3925
static int rsm_interception(struct vcpu_svm *svm)
{
3926 3927
	return kvm_emulate_instruction_from_buffer(&svm->vcpu,
					rsm_ins_bytes, 2) == EMULATE_DONE;
B
Brijesh Singh 已提交
3928 3929
}

A
Avi Kivity 已提交
3930 3931 3932 3933 3934 3935 3936 3937
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);
3938
	return kvm_complete_insn_gp(&svm->vcpu, err);
A
Avi Kivity 已提交
3939 3940
}

3941 3942
static bool check_selective_cr0_intercepted(struct vcpu_svm *svm,
					    unsigned long val)
3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964
{
	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;
}

3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979
#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;
3980 3981 3982 3983
	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;
3984 3985 3986 3987 3988 3989 3990

	err = 0;
	if (cr >= 16) { /* mov to cr */
		cr -= 16;
		val = kvm_register_read(&svm->vcpu, reg);
		switch (cr) {
		case 0:
3991 3992
			if (!check_selective_cr0_intercepted(svm, val))
				err = kvm_set_cr0(&svm->vcpu, val);
3993 3994 3995
			else
				return 1;

3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019
			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:
4020
			val = kvm_read_cr3(&svm->vcpu);
4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034
			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);
	}
4035
	return kvm_complete_insn_gp(&svm->vcpu, err);
4036 4037
}

4038 4039 4040 4041 4042
static int dr_interception(struct vcpu_svm *svm)
{
	int reg, dr;
	unsigned long val;

4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053
	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;
	}

4054 4055 4056 4057 4058 4059 4060
	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 */
4061 4062
		if (!kvm_require_dr(&svm->vcpu, dr - 16))
			return 1;
4063 4064 4065
		val = kvm_register_read(&svm->vcpu, reg);
		kvm_set_dr(&svm->vcpu, dr - 16, val);
	} else {
4066 4067 4068 4069
		if (!kvm_require_dr(&svm->vcpu, dr))
			return 1;
		kvm_get_dr(&svm->vcpu, dr, &val);
		kvm_register_write(&svm->vcpu, reg, val);
4070 4071
	}

4072
	return kvm_skip_emulated_instruction(&svm->vcpu);
4073 4074
}

A
Avi Kivity 已提交
4075
static int cr8_write_interception(struct vcpu_svm *svm)
4076
{
A
Avi Kivity 已提交
4077
	struct kvm_run *kvm_run = svm->vcpu.run;
A
Andre Przywara 已提交
4078
	int r;
A
Avi Kivity 已提交
4079

4080 4081
	u8 cr8_prev = kvm_get_cr8(&svm->vcpu);
	/* instruction emulation calls kvm_set_cr8() */
4082
	r = cr_interception(svm);
4083
	if (lapic_in_kernel(&svm->vcpu))
4084
		return r;
4085
	if (cr8_prev <= kvm_get_cr8(&svm->vcpu))
4086
		return r;
4087 4088 4089 4090
	kvm_run->exit_reason = KVM_EXIT_SET_TPR;
	return 0;
}

4091 4092
static int svm_get_msr_feature(struct kvm_msr_entry *msr)
{
4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104
	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;
4105 4106
}

4107
static int svm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
A
Avi Kivity 已提交
4108
{
4109 4110
	struct vcpu_svm *svm = to_svm(vcpu);

4111
	switch (msr_info->index) {
B
Brian Gerst 已提交
4112
	case MSR_STAR:
4113
		msr_info->data = svm->vmcb->save.star;
A
Avi Kivity 已提交
4114
		break;
4115
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
4116
	case MSR_LSTAR:
4117
		msr_info->data = svm->vmcb->save.lstar;
A
Avi Kivity 已提交
4118 4119
		break;
	case MSR_CSTAR:
4120
		msr_info->data = svm->vmcb->save.cstar;
A
Avi Kivity 已提交
4121 4122
		break;
	case MSR_KERNEL_GS_BASE:
4123
		msr_info->data = svm->vmcb->save.kernel_gs_base;
A
Avi Kivity 已提交
4124 4125
		break;
	case MSR_SYSCALL_MASK:
4126
		msr_info->data = svm->vmcb->save.sfmask;
A
Avi Kivity 已提交
4127 4128 4129
		break;
#endif
	case MSR_IA32_SYSENTER_CS:
4130
		msr_info->data = svm->vmcb->save.sysenter_cs;
A
Avi Kivity 已提交
4131 4132
		break;
	case MSR_IA32_SYSENTER_EIP:
4133
		msr_info->data = svm->sysenter_eip;
A
Avi Kivity 已提交
4134 4135
		break;
	case MSR_IA32_SYSENTER_ESP:
4136
		msr_info->data = svm->sysenter_esp;
A
Avi Kivity 已提交
4137
		break;
P
Paolo Bonzini 已提交
4138 4139 4140 4141 4142
	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
4143 4144 4145 4146 4147
	/*
	 * 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.
	 */
4148
	case MSR_IA32_DEBUGCTLMSR:
4149
		msr_info->data = svm->vmcb->save.dbgctl;
4150 4151
		break;
	case MSR_IA32_LASTBRANCHFROMIP:
4152
		msr_info->data = svm->vmcb->save.br_from;
4153 4154
		break;
	case MSR_IA32_LASTBRANCHTOIP:
4155
		msr_info->data = svm->vmcb->save.br_to;
4156 4157
		break;
	case MSR_IA32_LASTINTFROMIP:
4158
		msr_info->data = svm->vmcb->save.last_excp_from;
4159 4160
		break;
	case MSR_IA32_LASTINTTOIP:
4161
		msr_info->data = svm->vmcb->save.last_excp_to;
4162
		break;
A
Alexander Graf 已提交
4163
	case MSR_VM_HSAVE_PA:
4164
		msr_info->data = svm->nested.hsave_msr;
A
Alexander Graf 已提交
4165
		break;
4166
	case MSR_VM_CR:
4167
		msr_info->data = svm->nested.vm_cr_msr;
4168
		break;
4169 4170
	case MSR_IA32_SPEC_CTRL:
		if (!msr_info->host_initiated &&
4171 4172
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBRS) &&
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_SSBD))
4173 4174 4175 4176
			return 1;

		msr_info->data = svm->spec_ctrl;
		break;
4177 4178 4179 4180 4181 4182 4183
	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;
4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200
	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;
4201 4202 4203
	case MSR_F10H_DECFG:
		msr_info->data = svm->msr_decfg;
		break;
A
Avi Kivity 已提交
4204
	default:
4205
		return kvm_get_msr_common(vcpu, msr_info);
A
Avi Kivity 已提交
4206 4207 4208 4209
	}
	return 0;
}

A
Avi Kivity 已提交
4210
static int rdmsr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4211
{
4212
	u32 ecx = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
4213
	struct msr_data msr_info;
A
Avi Kivity 已提交
4214

4215 4216 4217
	msr_info.index = ecx;
	msr_info.host_initiated = false;
	if (svm_get_msr(&svm->vcpu, &msr_info)) {
4218
		trace_kvm_msr_read_ex(ecx);
4219
		kvm_inject_gp(&svm->vcpu, 0);
4220
		return 1;
4221
	} else {
4222
		trace_kvm_msr_read(ecx, msr_info.data);
4223

4224 4225 4226 4227
		kvm_register_write(&svm->vcpu, VCPU_REGS_RAX,
				   msr_info.data & 0xffffffff);
		kvm_register_write(&svm->vcpu, VCPU_REGS_RDX,
				   msr_info.data >> 32);
4228
		svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
4229
		return kvm_skip_emulated_instruction(&svm->vcpu);
A
Avi Kivity 已提交
4230 4231 4232
	}
}

4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257
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;
}

4258
static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
A
Avi Kivity 已提交
4259
{
4260 4261
	struct vcpu_svm *svm = to_svm(vcpu);

4262 4263
	u32 ecx = msr->index;
	u64 data = msr->data;
A
Avi Kivity 已提交
4264
	switch (ecx) {
P
Paolo Bonzini 已提交
4265 4266 4267 4268 4269 4270 4271
	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;
4272 4273
	case MSR_IA32_SPEC_CTRL:
		if (!msr->host_initiated &&
4274 4275
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBRS) &&
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_SSBD))
4276 4277 4278
			return 1;

		/* The STIBP bit doesn't fault even if it's not advertised */
4279
		if (data & ~(SPEC_CTRL_IBRS | SPEC_CTRL_STIBP | SPEC_CTRL_SSBD))
4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299
			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
4300 4301
	case MSR_IA32_PRED_CMD:
		if (!msr->host_initiated &&
4302
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBPB))
A
Ashok Raj 已提交
4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315
			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;
4316 4317 4318 4319 4320 4321 4322 4323 4324 4325
	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
4326
	case MSR_STAR:
4327
		svm->vmcb->save.star = data;
A
Avi Kivity 已提交
4328
		break;
4329
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
4330
	case MSR_LSTAR:
4331
		svm->vmcb->save.lstar = data;
A
Avi Kivity 已提交
4332 4333
		break;
	case MSR_CSTAR:
4334
		svm->vmcb->save.cstar = data;
A
Avi Kivity 已提交
4335 4336
		break;
	case MSR_KERNEL_GS_BASE:
4337
		svm->vmcb->save.kernel_gs_base = data;
A
Avi Kivity 已提交
4338 4339
		break;
	case MSR_SYSCALL_MASK:
4340
		svm->vmcb->save.sfmask = data;
A
Avi Kivity 已提交
4341 4342 4343
		break;
#endif
	case MSR_IA32_SYSENTER_CS:
4344
		svm->vmcb->save.sysenter_cs = data;
A
Avi Kivity 已提交
4345 4346
		break;
	case MSR_IA32_SYSENTER_EIP:
4347
		svm->sysenter_eip = data;
4348
		svm->vmcb->save.sysenter_eip = data;
A
Avi Kivity 已提交
4349 4350
		break;
	case MSR_IA32_SYSENTER_ESP:
4351
		svm->sysenter_esp = data;
4352
		svm->vmcb->save.sysenter_esp = data;
A
Avi Kivity 已提交
4353
		break;
P
Paolo Bonzini 已提交
4354 4355 4356 4357 4358 4359 4360 4361 4362 4363 4364 4365
	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;
4366
	case MSR_IA32_DEBUGCTLMSR:
4367
		if (!boot_cpu_has(X86_FEATURE_LBRV)) {
4368 4369
			vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n",
				    __func__, data);
4370 4371 4372 4373 4374 4375
			break;
		}
		if (data & DEBUGCTL_RESERVED_BITS)
			return 1;

		svm->vmcb->save.dbgctl = data;
4376
		mark_dirty(svm->vmcb, VMCB_LBR);
4377 4378 4379 4380
		if (data & (1ULL<<0))
			svm_enable_lbrv(svm);
		else
			svm_disable_lbrv(svm);
4381
		break;
A
Alexander Graf 已提交
4382
	case MSR_VM_HSAVE_PA:
4383
		svm->nested.hsave_msr = data;
4384
		break;
4385
	case MSR_VM_CR:
4386
		return svm_set_vm_cr(vcpu, data);
4387
	case MSR_VM_IGNNE:
4388
		vcpu_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data);
4389
		break;
4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403 4404 4405 4406 4407
	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;
	}
4408 4409 4410
	case MSR_IA32_APICBASE:
		if (kvm_vcpu_apicv_active(vcpu))
			avic_update_vapic_bar(to_svm(vcpu), data);
4411
		/* Fall through */
A
Avi Kivity 已提交
4412
	default:
4413
		return kvm_set_msr_common(vcpu, msr);
A
Avi Kivity 已提交
4414 4415 4416 4417
	}
	return 0;
}

A
Avi Kivity 已提交
4418
static int wrmsr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4419
{
4420
	struct msr_data msr;
4421 4422
	u32 ecx = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
	u64 data = kvm_read_edx_eax(&svm->vcpu);
4423

4424 4425 4426
	msr.data = data;
	msr.index = ecx;
	msr.host_initiated = false;
4427

4428
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
4429
	if (kvm_set_msr(&svm->vcpu, &msr)) {
4430
		trace_kvm_msr_write_ex(ecx, data);
4431
		kvm_inject_gp(&svm->vcpu, 0);
4432
		return 1;
4433 4434
	} else {
		trace_kvm_msr_write(ecx, data);
4435
		return kvm_skip_emulated_instruction(&svm->vcpu);
4436
	}
A
Avi Kivity 已提交
4437 4438
}

A
Avi Kivity 已提交
4439
static int msr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4440
{
R
Rusty Russell 已提交
4441
	if (svm->vmcb->control.exit_info_1)
A
Avi Kivity 已提交
4442
		return wrmsr_interception(svm);
A
Avi Kivity 已提交
4443
	else
A
Avi Kivity 已提交
4444
		return rdmsr_interception(svm);
A
Avi Kivity 已提交
4445 4446
}

A
Avi Kivity 已提交
4447
static int interrupt_window_interception(struct vcpu_svm *svm)
4448
{
4449
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
4450
	svm_clear_vintr(svm);
4451
	svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
4452
	mark_dirty(svm->vmcb, VMCB_INTR);
4453
	++svm->vcpu.stat.irq_window_exits;
4454 4455 4456
	return 1;
}

4457 4458
static int pause_interception(struct vcpu_svm *svm)
{
4459 4460 4461
	struct kvm_vcpu *vcpu = &svm->vcpu;
	bool in_kernel = (svm_get_cpl(vcpu) == 0);

4462 4463 4464
	if (pause_filter_thresh)
		grow_ple_window(vcpu);

4465
	kvm_vcpu_on_spin(vcpu, in_kernel);
4466 4467 4468
	return 1;
}

4469 4470
static int nop_interception(struct vcpu_svm *svm)
{
4471
	return kvm_skip_emulated_instruction(&(svm->vcpu));
4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485
}

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);
}

4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497
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
4498
	u32 index = svm->vmcb->control.exit_info_2 & 0xFF;
4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522
	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;

		/*
4523 4524
		 * Update ICR high and low, then emulate sending IPI,
		 * which is handled when writing APIC_ICR.
4525
		 */
4526 4527
		kvm_lapic_reg_write(apic, APIC_ICR2, icrh);
		kvm_lapic_reg_write(apic, APIC_ICR, icrl);
4528 4529 4530
		break;
	}
	case AVIC_IPI_FAILURE_INVALID_TARGET:
4531 4532
		WARN_ONCE(1, "Invalid IPI target: index=%u, vcpu=%d, icr=%#0x:%#0x\n",
			  index, svm->vcpu.vcpu_id, icrh, icrl);
4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545
		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)
{
4546
	struct kvm_svm *kvm_svm = to_kvm_svm(vcpu->kvm);
4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567
	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;
	}

4568
	logical_apic_id_table = (u32 *) page_address(kvm_svm->avic_logical_id_table_page);
4569 4570 4571 4572

	return &logical_apic_id_table[index];
}

4573
static int avic_ldr_write(struct kvm_vcpu *vcpu, u8 g_physical_id, u32 ldr)
4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585
{
	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);
4586
	new_entry |= AVIC_LOGICAL_ID_ENTRY_VALID_MASK;
4587 4588 4589 4590 4591
	WRITE_ONCE(*entry, new_entry);

	return 0;
}

4592 4593 4594 4595 4596 4597 4598 4599 4600 4601
static void avic_invalidate_logical_id_entry(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	bool flat = svm->dfr_reg == APIC_DFR_FLAT;
	u32 *entry = avic_get_logical_id_entry(vcpu, svm->ldr_reg, flat);

	if (entry)
		WRITE_ONCE(*entry, (u32) ~AVIC_LOGICAL_ID_ENTRY_VALID_MASK);
}

4602 4603
static int avic_handle_ldr_update(struct kvm_vcpu *vcpu)
{
4604
	int ret = 0;
4605 4606 4607
	struct vcpu_svm *svm = to_svm(vcpu);
	u32 ldr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_LDR);

4608 4609
	if (ldr == svm->ldr_reg)
		return 0;
4610

4611 4612 4613 4614 4615 4616
	avic_invalidate_logical_id_entry(vcpu);

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

	if (!ret)
4617
		svm->ldr_reg = ldr;
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 4643 4644 4645 4646 4647 4648 4649 4650 4651
	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;
}

4652
static void avic_handle_dfr_update(struct kvm_vcpu *vcpu)
4653 4654 4655 4656
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u32 dfr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_DFR);

4657 4658
	if (svm->dfr_reg == dfr)
		return;
4659

4660 4661
	avic_invalidate_logical_id_entry(vcpu);
	svm->dfr_reg = dfr;
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 4738
}

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 */
4739
		ret = (kvm_emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE);
4740 4741 4742 4743 4744
	}

	return ret;
}

4745
static int (*const svm_exit_handlers[])(struct vcpu_svm *svm) = {
4746 4747 4748 4749
	[SVM_EXIT_READ_CR0]			= cr_interception,
	[SVM_EXIT_READ_CR3]			= cr_interception,
	[SVM_EXIT_READ_CR4]			= cr_interception,
	[SVM_EXIT_READ_CR8]			= cr_interception,
4750
	[SVM_EXIT_CR0_SEL_WRITE]		= cr_interception,
4751
	[SVM_EXIT_WRITE_CR0]			= cr_interception,
4752 4753
	[SVM_EXIT_WRITE_CR3]			= cr_interception,
	[SVM_EXIT_WRITE_CR4]			= cr_interception,
J
Joerg Roedel 已提交
4754
	[SVM_EXIT_WRITE_CR8]			= cr8_write_interception,
4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770
	[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
4771 4772
	[SVM_EXIT_EXCP_BASE + DB_VECTOR]	= db_interception,
	[SVM_EXIT_EXCP_BASE + BP_VECTOR]	= bp_interception,
4773
	[SVM_EXIT_EXCP_BASE + UD_VECTOR]	= ud_interception,
J
Joerg Roedel 已提交
4774 4775
	[SVM_EXIT_EXCP_BASE + PF_VECTOR]	= pf_interception,
	[SVM_EXIT_EXCP_BASE + MC_VECTOR]	= mc_interception,
4776
	[SVM_EXIT_EXCP_BASE + AC_VECTOR]	= ac_interception,
4777
	[SVM_EXIT_EXCP_BASE + GP_VECTOR]	= gp_interception,
J
Joerg Roedel 已提交
4778
	[SVM_EXIT_INTR]				= intr_interception,
4779
	[SVM_EXIT_NMI]				= nmi_interception,
A
Avi Kivity 已提交
4780 4781
	[SVM_EXIT_SMI]				= nop_on_interception,
	[SVM_EXIT_INIT]				= nop_on_interception,
4782
	[SVM_EXIT_VINTR]			= interrupt_window_interception,
A
Avi Kivity 已提交
4783
	[SVM_EXIT_RDPMC]			= rdpmc_interception,
A
Avi Kivity 已提交
4784
	[SVM_EXIT_CPUID]			= cpuid_interception,
4785
	[SVM_EXIT_IRET]                         = iret_interception,
4786
	[SVM_EXIT_INVD]                         = emulate_on_interception,
4787
	[SVM_EXIT_PAUSE]			= pause_interception,
A
Avi Kivity 已提交
4788
	[SVM_EXIT_HLT]				= halt_interception,
M
Marcelo Tosatti 已提交
4789
	[SVM_EXIT_INVLPG]			= invlpg_interception,
A
Alexander Graf 已提交
4790
	[SVM_EXIT_INVLPGA]			= invlpga_interception,
J
Joerg Roedel 已提交
4791
	[SVM_EXIT_IOIO]				= io_interception,
A
Avi Kivity 已提交
4792 4793
	[SVM_EXIT_MSR]				= msr_interception,
	[SVM_EXIT_TASK_SWITCH]			= task_switch_interception,
4794
	[SVM_EXIT_SHUTDOWN]			= shutdown_interception,
A
Alexander Graf 已提交
4795
	[SVM_EXIT_VMRUN]			= vmrun_interception,
4796
	[SVM_EXIT_VMMCALL]			= vmmcall_interception,
4797 4798
	[SVM_EXIT_VMLOAD]			= vmload_interception,
	[SVM_EXIT_VMSAVE]			= vmsave_interception,
4799 4800
	[SVM_EXIT_STGI]				= stgi_interception,
	[SVM_EXIT_CLGI]				= clgi_interception,
4801
	[SVM_EXIT_SKINIT]			= skinit_interception,
D
David Kaplan 已提交
4802
	[SVM_EXIT_WBINVD]                       = wbinvd_interception,
4803 4804
	[SVM_EXIT_MONITOR]			= monitor_interception,
	[SVM_EXIT_MWAIT]			= mwait_interception,
J
Joerg Roedel 已提交
4805
	[SVM_EXIT_XSETBV]			= xsetbv_interception,
4806
	[SVM_EXIT_NPF]				= npf_interception,
B
Brijesh Singh 已提交
4807
	[SVM_EXIT_RSM]                          = rsm_interception,
4808 4809
	[SVM_EXIT_AVIC_INCOMPLETE_IPI]		= avic_incomplete_ipi_interception,
	[SVM_EXIT_AVIC_UNACCELERATED_ACCESS]	= avic_unaccelerated_access_interception,
A
Avi Kivity 已提交
4810 4811
};

4812
static void dump_vmcb(struct kvm_vcpu *vcpu)
4813 4814 4815 4816 4817 4818
{
	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");
4819 4820 4821 4822 4823 4824 4825
	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);
4826 4827
	pr_err("%-20s%d\n", "pause filter threshold:",
	       control->pause_filter_thresh);
4828 4829 4830 4831 4832 4833 4834 4835 4836 4837 4838 4839 4840 4841 4842
	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);
4843
	pr_err("%-20s%016llx\n", "avic_vapic_bar:", control->avic_vapic_bar);
4844 4845
	pr_err("%-20s%08x\n", "event_inj:", control->event_inj);
	pr_err("%-20s%08x\n", "event_inj_err:", control->event_inj_err);
4846
	pr_err("%-20s%lld\n", "virt_ext:", control->virt_ext);
4847
	pr_err("%-20s%016llx\n", "next_rip:", control->next_rip);
4848 4849 4850
	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);
4851
	pr_err("VMCB State Save Area:\n");
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 4891
	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);
4892 4893
	pr_err("cpl:            %d                efer:         %016llx\n",
		save->cpl, save->efer);
4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920
	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);
4921 4922
}

4923 4924 4925 4926 4927 4928 4929 4930
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
4931
static int handle_exit(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
4932
{
4933
	struct vcpu_svm *svm = to_svm(vcpu);
A
Avi Kivity 已提交
4934
	struct kvm_run *kvm_run = vcpu->run;
4935
	u32 exit_code = svm->vmcb->control.exit_code;
A
Avi Kivity 已提交
4936

4937 4938
	trace_kvm_exit(exit_code, vcpu, KVM_ISA_SVM);

4939
	if (!is_cr_intercept(svm, INTERCEPT_CR0_WRITE))
4940 4941 4942
		vcpu->arch.cr0 = svm->vmcb->save.cr0;
	if (npt_enabled)
		vcpu->arch.cr3 = svm->vmcb->save.cr3;
4943

4944 4945 4946 4947 4948 4949 4950
	if (unlikely(svm->nested.exit_required)) {
		nested_svm_vmexit(svm);
		svm->nested.exit_required = false;

		return 1;
	}

4951
	if (is_guest_mode(vcpu)) {
4952 4953
		int vmexit;

4954 4955 4956 4957
		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,
4958 4959
					svm->vmcb->control.exit_int_info_err,
					KVM_ISA_SVM);
4960

4961 4962 4963 4964 4965 4966
		vmexit = nested_svm_exit_special(svm);

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

		if (vmexit == NESTED_EXIT_DONE)
4967 4968 4969
			return 1;
	}

4970 4971
	svm_complete_interrupts(svm);

4972 4973 4974 4975
	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;
4976 4977
		pr_err("KVM: FAILED VMRUN WITH VMCB:\n");
		dump_vmcb(vcpu);
4978 4979 4980
		return 0;
	}

4981
	if (is_external_interrupt(svm->vmcb->control.exit_int_info) &&
4982
	    exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR &&
4983 4984
	    exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH &&
	    exit_code != SVM_EXIT_INTR && exit_code != SVM_EXIT_NMI)
4985
		printk(KERN_ERR "%s: unexpected exit_int_info 0x%x "
A
Avi Kivity 已提交
4986
		       "exit_code 0x%x\n",
4987
		       __func__, svm->vmcb->control.exit_int_info,
A
Avi Kivity 已提交
4988 4989
		       exit_code);

4990
	if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
J
Joe Perches 已提交
4991
	    || !svm_exit_handlers[exit_code]) {
4992
		WARN_ONCE(1, "svm: unexpected exit reason 0x%x\n", exit_code);
4993 4994
		kvm_queue_exception(vcpu, UD_VECTOR);
		return 1;
A
Avi Kivity 已提交
4995 4996
	}

A
Avi Kivity 已提交
4997
	return svm_exit_handlers[exit_code](svm);
A
Avi Kivity 已提交
4998 4999 5000 5001 5002 5003
}

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

5004 5005
	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
5006 5007 5008
	load_TR_desc();
}

5009 5010 5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024 5025 5026 5027 5028 5029 5030 5031 5032
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
5033
static void pre_svm_run(struct vcpu_svm *svm)
A
Avi Kivity 已提交
5034 5035 5036
{
	int cpu = raw_smp_processor_id();

5037
	struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
A
Avi Kivity 已提交
5038

5039 5040 5041
	if (sev_guest(svm->vcpu.kvm))
		return pre_sev_run(svm, cpu);

5042
	/* FIXME: handle wraparound of asid_generation */
5043 5044
	if (svm->asid_generation != sd->asid_generation)
		new_asid(svm, sd);
A
Avi Kivity 已提交
5045 5046
}

5047 5048 5049 5050 5051 5052
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;
5053
	set_intercept(svm, INTERCEPT_IRET);
5054 5055
	++vcpu->stat.nmi_injections;
}
A
Avi Kivity 已提交
5056

5057
static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
A
Avi Kivity 已提交
5058 5059 5060
{
	struct vmcb_control_area *control;

5061
	/* The following fields are ignored when AVIC is enabled */
R
Rusty Russell 已提交
5062
	control = &svm->vmcb->control;
5063
	control->int_vector = irq;
A
Avi Kivity 已提交
5064 5065 5066
	control->int_ctl &= ~V_INTR_PRIO_MASK;
	control->int_ctl |= V_IRQ_MASK |
		((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
5067
	mark_dirty(svm->vmcb, VMCB_INTR);
A
Avi Kivity 已提交
5068 5069
}

5070
static void svm_set_irq(struct kvm_vcpu *vcpu)
E
Eddie Dong 已提交
5071 5072 5073
{
	struct vcpu_svm *svm = to_svm(vcpu);

5074
	BUG_ON(!(gif_set(svm)));
5075

5076 5077 5078
	trace_kvm_inj_virq(vcpu->arch.interrupt.nr);
	++vcpu->stat.irq_injections;

5079 5080
	svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr |
		SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR;
E
Eddie Dong 已提交
5081 5082
}

5083 5084 5085 5086 5087
static inline bool svm_nested_virtualize_tpr(struct kvm_vcpu *vcpu)
{
	return is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK);
}

5088
static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
5089 5090 5091
{
	struct vcpu_svm *svm = to_svm(vcpu);

5092 5093
	if (svm_nested_virtualize_tpr(vcpu) ||
	    kvm_vcpu_apicv_active(vcpu))
5094 5095
		return;

5096 5097
	clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);

5098
	if (irr == -1)
5099 5100
		return;

5101
	if (tpr >= irr)
5102
		set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
5103
}
5104

5105
static void svm_set_virtual_apic_mode(struct kvm_vcpu *vcpu)
5106 5107 5108 5109
{
	return;
}

5110
static bool svm_get_enable_apicv(struct kvm_vcpu *vcpu)
5111
{
5112
	return avic && irqchip_split(vcpu->kvm);
5113 5114 5115 5116
}

static void svm_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr)
{
5117 5118
}

5119
static void svm_hwapic_isr_update(struct kvm_vcpu *vcpu, int max_isr)
5120
{
5121 5122
}

5123
/* Note: Currently only used by Hyper-V. */
5124
static void svm_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu)
5125
{
5126 5127 5128
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *vmcb = svm->vmcb;

5129 5130 5131 5132 5133
	if (kvm_vcpu_apicv_active(vcpu))
		vmcb->control.int_ctl |= AVIC_ENABLE_MASK;
	else
		vmcb->control.int_ctl &= ~AVIC_ENABLE_MASK;
	mark_dirty(vmcb, VMCB_AVIC);
5134 5135
}

5136
static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
5137 5138 5139 5140
{
	return;
}

5141 5142 5143 5144 5145 5146 5147
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,
5148
		       kvm_cpu_get_apicid(vcpu->cpu));
5149 5150 5151 5152
	else
		kvm_vcpu_wake_up(vcpu);
}

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

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

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

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

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

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

	/**
	 * Allocating new amd_iommu_pi_data, which will get
	 * add to the per-vcpu ir_list.
	 */
5199
	ir = kzalloc(sizeof(struct amd_svm_iommu_ir), GFP_KERNEL_ACCOUNT);
5200 5201 5202 5203 5204 5205 5206 5207 5208 5209 5210 5211 5212 5213 5214 5215 5216 5217 5218 5219 5220 5221 5222 5223 5224 5225 5226 5227 5228 5229 5230 5231 5232 5233 5234 5235 5236 5237 5238 5239 5240 5241
	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);
5242
	vcpu_info->pi_desc_addr = __sme_set(page_to_phys((*svm)->avic_backing_page));
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 5292
	vcpu_info->vector = irq.vector;

	return 0;
}

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

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

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

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

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

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

		/**
		 * Here, we setup with legacy mode in the following cases:
		 * 1. When cannot target interrupt to a specific vcpu.
		 * 2. Unsetting posted interrupt.
		 * 3. APIC virtialization is disabled for the vcpu.
		 */
		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 */
5293 5294
			pi.base = __sme_set(page_to_phys(svm->avic_backing_page) &
					    AVIC_HPA_MASK);
5295
			pi.ga_tag = AVIC_GATAG(to_kvm_svm(kvm)->avic_vm_id,
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 5338
						     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) {
5339 5340
			trace_kvm_pi_irte_update(host_irq, svm->vcpu.vcpu_id,
						 e->gsi, vcpu_info.vector,
5341 5342 5343 5344 5345 5346 5347 5348 5349 5350 5351 5352 5353 5354 5355
						 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;
}

5356 5357 5358 5359
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
5360 5361 5362 5363 5364 5365
	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;
5366 5367
}

J
Jan Kiszka 已提交
5368 5369 5370 5371 5372 5373 5374 5375 5376 5377 5378 5379 5380
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;
5381
		set_intercept(svm, INTERCEPT_IRET);
J
Jan Kiszka 已提交
5382 5383
	} else {
		svm->vcpu.arch.hflags &= ~HF_NMI_MASK;
5384
		clr_intercept(svm, INTERCEPT_IRET);
J
Jan Kiszka 已提交
5385 5386 5387
	}
}

5388 5389 5390 5391
static int svm_interrupt_allowed(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *vmcb = svm->vmcb;
5392 5393 5394 5395 5396 5397
	int ret;

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

5398
	ret = !!(kvm_get_rflags(vcpu) & X86_EFLAGS_IF);
5399

5400
	if (is_guest_mode(vcpu))
5401 5402 5403
		return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK);

	return ret;
5404 5405
}

5406
static void enable_irq_window(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
5407
{
5408 5409
	struct vcpu_svm *svm = to_svm(vcpu);

5410 5411 5412
	if (kvm_vcpu_apicv_active(vcpu))
		return;

J
Joerg Roedel 已提交
5413 5414 5415 5416
	/*
	 * 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
5417 5418 5419
	 * 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
5420
	 */
5421
	if ((vgif_enabled(svm) || gif_set(svm)) && nested_svm_intr(svm)) {
5422 5423 5424
		svm_set_vintr(svm);
		svm_inject_irq(svm, 0x0);
	}
5425 5426
}

5427
static void enable_nmi_window(struct kvm_vcpu *vcpu)
5428
{
5429
	struct vcpu_svm *svm = to_svm(vcpu);
5430

5431 5432
	if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK))
	    == HF_NMI_MASK)
5433
		return; /* IRET will cause a vm exit */
5434

5435 5436 5437
	if (!gif_set(svm)) {
		if (vgif_enabled(svm))
			set_intercept(svm, INTERCEPT_STGI);
5438
		return; /* STGI will cause a vm exit */
5439
	}
5440 5441 5442 5443

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

J
Joerg Roedel 已提交
5444 5445 5446 5447
	/*
	 * Something prevents NMI from been injected. Single step over possible
	 * problem (IRET or exception injection or interrupt shadow)
	 */
5448
	svm->nmi_singlestep_guest_rflags = svm_get_rflags(vcpu);
J
Jan Kiszka 已提交
5449
	svm->nmi_singlestep = true;
5450
	svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);
5451 5452
}

5453 5454 5455 5456 5457
static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)
{
	return 0;
}

5458 5459 5460 5461 5462
static int svm_set_identity_map_addr(struct kvm *kvm, u64 ident_addr)
{
	return 0;
}

5463
static void svm_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa)
5464
{
5465 5466 5467 5468 5469 5470
	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--;
5471 5472
}

5473 5474 5475 5476 5477 5478 5479
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);
}

5480 5481 5482 5483
static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
{
}

5484 5485 5486 5487
static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

5488
	if (svm_nested_virtualize_tpr(vcpu))
5489 5490
		return;

5491
	if (!is_cr_intercept(svm, INTERCEPT_CR8_WRITE)) {
5492
		int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK;
5493
		kvm_set_cr8(vcpu, cr8);
5494 5495 5496
	}
}

5497 5498 5499 5500 5501
static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u64 cr8;

5502 5503
	if (svm_nested_virtualize_tpr(vcpu) ||
	    kvm_vcpu_apicv_active(vcpu))
5504 5505
		return;

5506 5507 5508 5509 5510
	cr8 = kvm_get_cr8(vcpu);
	svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
	svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK;
}

5511 5512 5513 5514 5515
static void svm_complete_interrupts(struct vcpu_svm *svm)
{
	u8 vector;
	int type;
	u32 exitintinfo = svm->vmcb->control.exit_int_info;
5516 5517 5518
	unsigned int3_injected = svm->int3_injected;

	svm->int3_injected = 0;
5519

5520 5521 5522 5523 5524 5525
	/*
	 * 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) {
5526
		svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK);
5527 5528
		kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
	}
5529

5530 5531 5532 5533 5534 5535 5536
	svm->vcpu.arch.nmi_injected = false;
	kvm_clear_exception_queue(&svm->vcpu);
	kvm_clear_interrupt_queue(&svm->vcpu);

	if (!(exitintinfo & SVM_EXITINTINFO_VALID))
		return;

5537 5538
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);

5539 5540 5541 5542 5543 5544 5545 5546
	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:
5547 5548 5549 5550 5551 5552 5553 5554 5555 5556 5557
		/*
		 * 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);
5558
			break;
5559
		}
5560 5561
		if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) {
			u32 err = svm->vmcb->control.exit_int_info_err;
5562
			kvm_requeue_exception_e(&svm->vcpu, vector, err);
5563 5564

		} else
5565
			kvm_requeue_exception(&svm->vcpu, vector);
5566 5567
		break;
	case SVM_EXITINTINFO_TYPE_INTR:
5568
		kvm_queue_interrupt(&svm->vcpu, vector, false);
5569 5570 5571 5572 5573 5574
		break;
	default:
		break;
	}
}

A
Avi Kivity 已提交
5575 5576 5577 5578 5579 5580 5581 5582 5583 5584 5585
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
5586
static void svm_vcpu_run(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
5587
{
5588
	struct vcpu_svm *svm = to_svm(vcpu);
5589

5590 5591 5592 5593
	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];

5594 5595 5596 5597 5598 5599 5600
	/*
	 * A vmexit emulation is required before the vcpu can be executed
	 * again.
	 */
	if (unlikely(svm->nested.exit_required))
		return;

5601 5602 5603 5604 5605 5606 5607 5608 5609 5610 5611 5612 5613 5614 5615 5616
	/*
	 * 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
5617
	pre_svm_run(svm);
A
Avi Kivity 已提交
5618

5619 5620
	sync_lapic_to_cr8(vcpu);

5621
	svm->vmcb->save.cr2 = vcpu->arch.cr2;
A
Avi Kivity 已提交
5622

5623 5624
	clgi();

5625 5626 5627 5628 5629 5630
	/*
	 * 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.
	 */
5631
	x86_spec_ctrl_set_guest(svm->spec_ctrl, svm->virt_spec_ctrl);
5632

5633 5634
	local_irq_enable();

A
Avi Kivity 已提交
5635
	asm volatile (
A
Avi Kivity 已提交
5636 5637 5638 5639 5640 5641 5642
		"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"
5643
#ifdef CONFIG_X86_64
R
Rusty Russell 已提交
5644 5645 5646 5647 5648 5649 5650 5651
		"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
5652 5653 5654
#endif

		/* Enter guest mode */
A
Avi Kivity 已提交
5655 5656
		"push %%" _ASM_AX " \n\t"
		"mov %c[vmcb](%[svm]), %%" _ASM_AX " \n\t"
5657 5658 5659
		__ex("vmload %%" _ASM_AX) "\n\t"
		__ex("vmrun %%" _ASM_AX) "\n\t"
		__ex("vmsave %%" _ASM_AX) "\n\t"
A
Avi Kivity 已提交
5660
		"pop %%" _ASM_AX " \n\t"
A
Avi Kivity 已提交
5661 5662

		/* Save guest registers, load host registers */
A
Avi Kivity 已提交
5663 5664 5665 5666 5667 5668
		"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"
5669
#ifdef CONFIG_X86_64
R
Rusty Russell 已提交
5670 5671 5672 5673 5674 5675 5676 5677
		"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"
5678 5679 5680 5681
		/*
		* Clear host registers marked as clobbered to prevent
		* speculative use.
		*/
5682 5683 5684 5685 5686 5687 5688 5689
		"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
5690
#endif
5691 5692 5693 5694 5695
		"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
5696
		"pop %%" _ASM_BP
A
Avi Kivity 已提交
5697
		:
R
Rusty Russell 已提交
5698
		: [svm]"a"(svm),
A
Avi Kivity 已提交
5699
		  [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
5700 5701 5702 5703 5704 5705
		  [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]))
5706
#ifdef CONFIG_X86_64
5707 5708 5709 5710 5711 5712 5713 5714
		  , [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
5715
#endif
5716 5717
		: "cc", "memory"
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
5718
		, "rbx", "rcx", "rdx", "rsi", "rdi"
5719
		, "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15"
A
Avi Kivity 已提交
5720 5721
#else
		, "ebx", "ecx", "edx", "esi", "edi"
5722 5723
#endif
		);
A
Avi Kivity 已提交
5724

5725 5726 5727 5728 5729 5730 5731 5732 5733 5734 5735 5736
	/* 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

5737 5738 5739 5740 5741 5742 5743 5744 5745 5746 5747 5748 5749 5750 5751
	/*
	 * 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.
	 */
5752
	if (unlikely(!msr_write_intercepted(vcpu, MSR_IA32_SPEC_CTRL)))
5753
		svm->spec_ctrl = native_read_msr(MSR_IA32_SPEC_CTRL);
5754

A
Avi Kivity 已提交
5755 5756
	reload_tss(vcpu);

5757 5758
	local_irq_disable();

5759 5760
	x86_spec_ctrl_restore_host(svm->spec_ctrl, svm->virt_spec_ctrl);

5761 5762 5763 5764 5765
	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;

5766
	if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
5767
		kvm_before_interrupt(&svm->vcpu);
5768 5769 5770 5771 5772 5773

	stgi();

	/* Any pending NMI will happen here */

	if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
5774
		kvm_after_interrupt(&svm->vcpu);
5775

5776 5777
	sync_cr8_to_lapic(vcpu);

5778
	svm->next_rip = 0;
5779

5780 5781
	svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;

G
Gleb Natapov 已提交
5782 5783
	/* if exit due to PF check for async PF */
	if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR)
5784
		svm->vcpu.arch.apf.host_apf_reason = kvm_read_and_reset_pf_reason();
G
Gleb Natapov 已提交
5785

A
Avi Kivity 已提交
5786 5787 5788 5789
	if (npt_enabled) {
		vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR);
		vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR);
	}
5790 5791 5792 5793 5794 5795 5796 5797

	/*
	 * 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);
5798 5799

	mark_all_clean(svm->vmcb);
A
Avi Kivity 已提交
5800
}
5801
STACK_FRAME_NON_STANDARD(svm_vcpu_run);
A
Avi Kivity 已提交
5802 5803 5804

static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
{
5805 5806
	struct vcpu_svm *svm = to_svm(vcpu);

5807
	svm->vmcb->save.cr3 = __sme_set(root);
5808
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
5809 5810
}

5811 5812 5813 5814
static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root)
{
	struct vcpu_svm *svm = to_svm(vcpu);

5815
	svm->vmcb->control.nested_cr3 = __sme_set(root);
5816
	mark_dirty(svm->vmcb, VMCB_NPT);
5817 5818

	/* Also sync guest cr3 here in case we live migrate */
5819
	svm->vmcb->save.cr3 = kvm_read_cr3(vcpu);
5820
	mark_dirty(svm->vmcb, VMCB_CR);
5821 5822
}

A
Avi Kivity 已提交
5823 5824
static int is_disabled(void)
{
5825 5826 5827 5828 5829 5830
	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
5831 5832 5833
	return 0;
}

I
Ingo Molnar 已提交
5834 5835 5836 5837 5838 5839 5840 5841 5842 5843 5844
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
5845 5846 5847 5848 5849
static void svm_check_processor_compat(void *rtn)
{
	*(int *)rtn = 0;
}

5850 5851 5852 5853 5854
static bool svm_cpu_has_accelerated_tpr(void)
{
	return false;
}

5855
static bool svm_has_emulated_msr(int index)
5856
{
5857 5858 5859 5860 5861 5862 5863
	switch (index) {
	case MSR_IA32_MCG_EXT_CTL:
		return false;
	default:
		break;
	}

5864 5865 5866
	return true;
}

5867 5868 5869 5870 5871
static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
{
	return 0;
}

5872 5873
static void svm_cpuid_update(struct kvm_vcpu *vcpu)
{
5874 5875 5876
	struct vcpu_svm *svm = to_svm(vcpu);

	/* Update nrips enabled cache */
5877
	svm->nrips_enabled = !!guest_cpuid_has(&svm->vcpu, X86_FEATURE_NRIPS);
5878 5879 5880 5881

	if (!kvm_vcpu_apicv_active(vcpu))
		return;

5882
	guest_cpuid_clear(vcpu, X86_FEATURE_X2APIC);
5883 5884
}

5885 5886
static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
{
5887
	switch (func) {
5888 5889 5890 5891
	case 0x1:
		if (avic)
			entry->ecx &= ~bit(X86_FEATURE_X2APIC);
		break;
5892 5893 5894 5895
	case 0x80000001:
		if (nested)
			entry->ecx |= (1 << 2); /* Set SVM bit */
		break;
5896 5897 5898 5899 5900
	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 */
5901 5902 5903 5904
		entry->edx = 0; /* Per default do not support any
				   additional features */

		/* Support next_rip if host supports it */
5905
		if (boot_cpu_has(X86_FEATURE_NRIPS))
5906
			entry->edx |= SVM_FEATURE_NRIP;
5907

5908 5909 5910 5911
		/* Support NPT for the guest if enabled */
		if (npt_enabled)
			entry->edx |= SVM_FEATURE_NPT;

5912
		break;
5913 5914 5915 5916 5917 5918
	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);

5919
	}
5920 5921
}

5922
static int svm_get_lpage_level(void)
5923
{
5924
	return PT_PDPE_LEVEL;
5925 5926
}

5927 5928
static bool svm_rdtscp_supported(void)
{
P
Paolo Bonzini 已提交
5929
	return boot_cpu_has(X86_FEATURE_RDTSCP);
5930 5931
}

5932 5933 5934 5935 5936
static bool svm_invpcid_supported(void)
{
	return false;
}

5937 5938 5939 5940 5941
static bool svm_mpx_supported(void)
{
	return false;
}

5942 5943 5944 5945 5946
static bool svm_xsaves_supported(void)
{
	return false;
}

5947 5948 5949 5950 5951
static bool svm_umip_emulated(void)
{
	return false;
}

5952 5953 5954 5955 5956
static bool svm_pt_supported(void)
{
	return false;
}

5957 5958 5959 5960 5961
static bool svm_has_wbinvd_exit(void)
{
	return true;
}

5962
#define PRE_EX(exit)  { .exit_code = (exit), \
5963
			.stage = X86_ICPT_PRE_EXCEPT, }
5964
#define POST_EX(exit) { .exit_code = (exit), \
5965
			.stage = X86_ICPT_POST_EXCEPT, }
5966
#define POST_MEM(exit) { .exit_code = (exit), \
5967
			.stage = X86_ICPT_POST_MEMACCESS, }
5968

5969
static const struct __x86_intercept {
5970 5971 5972 5973 5974 5975 5976 5977
	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),
5978 5979
	[x86_intercept_dr_read]		= POST_EX(SVM_EXIT_READ_DR0),
	[x86_intercept_dr_write]	= POST_EX(SVM_EXIT_WRITE_DR0),
5980 5981 5982 5983 5984 5985 5986 5987
	[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),
5988 5989 5990 5991 5992 5993 5994 5995
	[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),
5996 5997 5998
	[x86_intercept_rdtscp]		= POST_EX(SVM_EXIT_RDTSCP),
	[x86_intercept_monitor]		= POST_MEM(SVM_EXIT_MONITOR),
	[x86_intercept_mwait]		= POST_EX(SVM_EXIT_MWAIT),
5999 6000 6001 6002 6003 6004 6005 6006 6007
	[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),
6008 6009 6010 6011 6012 6013 6014
	[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),
6015 6016 6017 6018
	[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),
6019 6020
};

6021
#undef PRE_EX
6022
#undef POST_EX
6023
#undef POST_MEM
6024

6025 6026 6027 6028
static int svm_check_intercept(struct kvm_vcpu *vcpu,
			       struct x86_instruction_info *info,
			       enum x86_intercept_stage stage)
{
6029 6030 6031 6032 6033 6034 6035 6036 6037 6038
	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];

6039
	if (stage != icpt_info.stage)
6040 6041 6042 6043 6044 6045 6046 6047 6048 6049 6050 6051 6052 6053
		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;

6054 6055
		if (icpt_info.exit_code != SVM_EXIT_WRITE_CR0 ||
		    info->intercept == x86_intercept_clts)
6056 6057 6058 6059 6060 6061 6062 6063 6064 6065 6066 6067 6068 6069 6070 6071 6072 6073 6074 6075 6076 6077 6078
			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;
	}
6079 6080 6081 6082
	case SVM_EXIT_READ_DR0:
	case SVM_EXIT_WRITE_DR0:
		icpt_info.exit_code += info->modrm_reg;
		break;
6083 6084 6085 6086 6087 6088
	case SVM_EXIT_MSR:
		if (info->intercept == x86_intercept_wrmsr)
			vmcb->control.exit_info_1 = 1;
		else
			vmcb->control.exit_info_1 = 0;
		break;
6089 6090 6091 6092 6093 6094 6095
	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;
6096
		break;
6097 6098 6099 6100 6101 6102
	case SVM_EXIT_IOIO: {
		u64 exit_info;
		u32 bytes;

		if (info->intercept == x86_intercept_in ||
		    info->intercept == x86_intercept_ins) {
6103 6104
			exit_info = ((info->src_val & 0xffff) << 16) |
				SVM_IOIO_TYPE_MASK;
6105
			bytes = info->dst_bytes;
6106
		} else {
6107
			exit_info = (info->dst_val & 0xffff) << 16;
6108
			bytes = info->src_bytes;
6109 6110 6111 6112 6113 6114 6115 6116 6117 6118 6119 6120 6121 6122 6123 6124 6125 6126 6127 6128
		}

		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;
	}
6129 6130 6131 6132
	default:
		break;
	}

6133 6134 6135
	/* TODO: Advertise NRIPS to guest hypervisor unconditionally */
	if (static_cpu_has(X86_FEATURE_NRIPS))
		vmcb->control.next_rip  = info->next_rip;
6136 6137 6138 6139 6140 6141 6142 6143
	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;
6144 6145
}

6146 6147 6148
static void svm_handle_external_intr(struct kvm_vcpu *vcpu)
{
	local_irq_enable();
P
Paolo Bonzini 已提交
6149 6150 6151 6152 6153 6154
	/*
	 * We must have an instruction with interrupts enabled, so
	 * the timer interrupt isn't delayed by the interrupt shadow.
	 */
	asm("nop");
	local_irq_disable();
6155 6156
}

6157 6158
static void svm_sched_in(struct kvm_vcpu *vcpu, int cpu)
{
6159 6160
	if (pause_filter_thresh)
		shrink_ple_window(vcpu);
6161 6162
}

6163 6164 6165 6166
static inline void avic_post_state_restore(struct kvm_vcpu *vcpu)
{
	if (avic_handle_apic_id_update(vcpu) != 0)
		return;
6167
	avic_handle_dfr_update(vcpu);
6168 6169 6170
	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
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;

6314
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6315 6316 6317 6318 6319 6320 6321 6322 6323 6324 6325 6326
	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
	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;

6364
	start = kzalloc(sizeof(*start), GFP_KERNEL_ACCOUNT);
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
	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
static unsigned long get_num_contig_pages(unsigned long idx,
				struct page **inpages, unsigned long npages)
6427 6428
{
	unsigned long paddr, next_paddr;
6429
	unsigned long i = idx + 1, pages = 1;
6430 6431 6432 6433 6434 6435 6436 6437 6438 6439 6440 6441 6442 6443 6444 6445 6446 6447

	/* 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)
{
6448
	unsigned long vaddr, vaddr_end, next_vaddr, npages, pages, size, i;
6449
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6450 6451 6452
	struct kvm_sev_launch_update_data params;
	struct sev_data_launch_update_data *data;
	struct page **inpages;
6453
	int ret;
6454 6455 6456 6457 6458 6459 6460

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

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

6461
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
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
	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
		return -EFAULT;

6538
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6539 6540 6541 6542 6543 6544 6545
	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
	struct sev_data_launch_finish *data;
	int ret;

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

6600
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6601 6602 6603 6604 6605 6606 6607 6608 6609 6610
	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
	struct kvm_sev_guest_status params;
	struct sev_data_guest_status *data;
	int ret;

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

6621
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6622 6623 6624 6625 6626 6627 6628 6629 6630 6631 6632 6633 6634 6635 6636 6637 6638 6639 6640
	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
	struct sev_data_dbg *data;
	int ret;

6649
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
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
	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
	struct page **src_p, **dst_p;
	struct kvm_sev_dbg debug;
	unsigned long n;
6802 6803
	unsigned int size;
	int ret;
6804 6805 6806 6807 6808 6809 6810

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

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

6811 6812 6813 6814 6815
	if (!debug.len || debug.src_uaddr + debug.len < debug.src_uaddr)
		return -EINVAL;
	if (!debug.dst_uaddr)
		return -EINVAL;

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 6846 6847 6848 6849 6850 6851
	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);

6852 6853 6854 6855 6856 6857 6858 6859 6860 6861 6862 6863 6864
		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);
6865

6866 6867
		sev_unpin_memory(kvm, src_p, n);
		sev_unpin_memory(kvm, dst_p, n);
6868 6869 6870 6871 6872 6873 6874 6875 6876 6877 6878 6879

		if (ret)
			goto err;

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

6880 6881
static int sev_launch_secret(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6882
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6883 6884 6885 6886 6887
	struct sev_data_launch_secret *data;
	struct kvm_sev_launch_secret params;
	struct page **pages;
	void *blob, *hdr;
	unsigned long n;
6888
	int ret, offset;
6889 6890 6891 6892 6893 6894 6895 6896 6897 6898 6899 6900 6901 6902 6903 6904 6905 6906 6907 6908 6909

	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;
6910
	data = kzalloc(sizeof(*data), GFP_KERNEL_ACCOUNT);
6911 6912 6913
	if (!data)
		goto e_unpin_memory;

6914 6915 6916 6917
	offset = params.guest_uaddr & (PAGE_SIZE - 1);
	data->guest_address = __sme_page_pa(pages[0]) + offset;
	data->guest_len = params.guest_len;

6918 6919 6920 6921 6922 6923 6924 6925 6926 6927 6928 6929 6930 6931
	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;
	}
6932 6933
	data->hdr_address = __psp_pa(hdr);
	data->hdr_len = params.hdr_len;
6934 6935 6936 6937 6938 6939 6940 6941 6942 6943 6944 6945 6946 6947 6948

	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
6949 6950 6951 6952 6953 6954 6955 6956 6957 6958 6959 6960 6961 6962 6963 6964 6965
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;
6966 6967 6968
	case KVM_SEV_LAUNCH_START:
		r = sev_launch_start(kvm, &sev_cmd);
		break;
6969 6970 6971
	case KVM_SEV_LAUNCH_UPDATE_DATA:
		r = sev_launch_update_data(kvm, &sev_cmd);
		break;
6972 6973 6974
	case KVM_SEV_LAUNCH_MEASURE:
		r = sev_launch_measure(kvm, &sev_cmd);
		break;
6975 6976 6977
	case KVM_SEV_LAUNCH_FINISH:
		r = sev_launch_finish(kvm, &sev_cmd);
		break;
6978 6979 6980
	case KVM_SEV_GUEST_STATUS:
		r = sev_guest_status(kvm, &sev_cmd);
		break;
6981 6982 6983
	case KVM_SEV_DBG_DECRYPT:
		r = sev_dbg_crypt(kvm, &sev_cmd, true);
		break;
6984 6985 6986
	case KVM_SEV_DBG_ENCRYPT:
		r = sev_dbg_crypt(kvm, &sev_cmd, false);
		break;
6987 6988 6989
	case KVM_SEV_LAUNCH_SECRET:
		r = sev_launch_secret(kvm, &sev_cmd);
		break;
B
Brijesh Singh 已提交
6990 6991 6992 6993 6994 6995 6996 6997 6998 6999 7000 7001 7002
	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;
}

7003 7004 7005
static int svm_register_enc_region(struct kvm *kvm,
				   struct kvm_enc_region *range)
{
7006
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
7007 7008 7009 7010 7011 7012
	struct enc_region *region;
	int ret = 0;

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

7013 7014 7015
	if (range->addr > ULONG_MAX || range->size > ULONG_MAX)
		return -EINVAL;

7016
	region = kzalloc(sizeof(*region), GFP_KERNEL_ACCOUNT);
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 7045 7046 7047 7048 7049 7050
	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)
{
7051
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
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 7088 7089 7090 7091 7092 7093
	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;
}

7094 7095 7096 7097 7098 7099
static uint16_t nested_get_evmcs_version(struct kvm_vcpu *vcpu)
{
	/* Not supported */
	return 0;
}

7100 7101 7102 7103 7104 7105 7106
static int nested_enable_evmcs(struct kvm_vcpu *vcpu,
				   uint16_t *vmcs_version)
{
	/* Intel-only feature */
	return -ENODEV;
}

7107 7108 7109 7110 7111 7112 7113 7114 7115 7116 7117 7118 7119 7120 7121 7122 7123 7124 7125 7126 7127 7128 7129 7130 7131 7132 7133 7134 7135 7136
static bool svm_need_emulation_on_page_fault(struct kvm_vcpu *vcpu)
{
	bool is_user, smap;

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

	/*
	 * Detect and workaround Errata 1096 Fam_17h_00_0Fh
	 *
	 * In non SEV guest, hypervisor will be able to read the guest
	 * memory to decode the instruction pointer when insn_len is zero
	 * so we return true to indicate that decoding is possible.
	 *
	 * But in the SEV guest, the guest memory is encrypted with the
	 * guest specific key and hypervisor will not be able to decode the
	 * instruction pointer so we will not able to workaround it. Lets
	 * print the error and request to kill the guest.
	 */
	if (is_user && smap) {
		if (!sev_guest(vcpu->kvm))
			return true;

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

	return false;
}

7137
static struct kvm_x86_ops svm_x86_ops __ro_after_init = {
A
Avi Kivity 已提交
7138 7139 7140 7141
	.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
7142
	.check_processor_compatibility = svm_check_processor_compat,
A
Avi Kivity 已提交
7143 7144
	.hardware_enable = svm_hardware_enable,
	.hardware_disable = svm_hardware_disable,
7145
	.cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr,
7146
	.has_emulated_msr = svm_has_emulated_msr,
A
Avi Kivity 已提交
7147 7148 7149

	.vcpu_create = svm_create_vcpu,
	.vcpu_free = svm_free_vcpu,
7150
	.vcpu_reset = svm_vcpu_reset,
A
Avi Kivity 已提交
7151

7152 7153
	.vm_alloc = svm_vm_alloc,
	.vm_free = svm_vm_free,
7154
	.vm_init = avic_vm_init,
B
Brijesh Singh 已提交
7155
	.vm_destroy = svm_vm_destroy,
7156

7157
	.prepare_guest_switch = svm_prepare_guest_switch,
A
Avi Kivity 已提交
7158 7159
	.vcpu_load = svm_vcpu_load,
	.vcpu_put = svm_vcpu_put,
7160 7161
	.vcpu_blocking = svm_vcpu_blocking,
	.vcpu_unblocking = svm_vcpu_unblocking,
A
Avi Kivity 已提交
7162

7163
	.update_bp_intercept = update_bp_intercept,
7164
	.get_msr_feature = svm_get_msr_feature,
A
Avi Kivity 已提交
7165 7166 7167 7168 7169
	.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,
7170
	.get_cpl = svm_get_cpl,
7171
	.get_cs_db_l_bits = kvm_get_cs_db_l_bits,
7172
	.decache_cr0_guest_bits = svm_decache_cr0_guest_bits,
7173
	.decache_cr3 = svm_decache_cr3,
7174
	.decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
A
Avi Kivity 已提交
7175 7176 7177 7178 7179 7180 7181 7182
	.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
7183 7184
	.get_dr6 = svm_get_dr6,
	.set_dr6 = svm_set_dr6,
7185
	.set_dr7 = svm_set_dr7,
7186
	.sync_dirty_debug_regs = svm_sync_dirty_debug_regs,
A
Avi Kivity 已提交
7187
	.cache_reg = svm_cache_reg,
A
Avi Kivity 已提交
7188 7189
	.get_rflags = svm_get_rflags,
	.set_rflags = svm_set_rflags,
7190

A
Avi Kivity 已提交
7191
	.tlb_flush = svm_flush_tlb,
7192
	.tlb_flush_gva = svm_flush_tlb_gva,
A
Avi Kivity 已提交
7193 7194

	.run = svm_vcpu_run,
7195
	.handle_exit = handle_exit,
A
Avi Kivity 已提交
7196
	.skip_emulated_instruction = skip_emulated_instruction,
7197 7198
	.set_interrupt_shadow = svm_set_interrupt_shadow,
	.get_interrupt_shadow = svm_get_interrupt_shadow,
I
Ingo Molnar 已提交
7199
	.patch_hypercall = svm_patch_hypercall,
E
Eddie Dong 已提交
7200
	.set_irq = svm_set_irq,
7201
	.set_nmi = svm_inject_nmi,
7202
	.queue_exception = svm_queue_exception,
A
Avi Kivity 已提交
7203
	.cancel_injection = svm_cancel_injection,
7204
	.interrupt_allowed = svm_interrupt_allowed,
7205
	.nmi_allowed = svm_nmi_allowed,
J
Jan Kiszka 已提交
7206 7207
	.get_nmi_mask = svm_get_nmi_mask,
	.set_nmi_mask = svm_set_nmi_mask,
7208 7209 7210
	.enable_nmi_window = enable_nmi_window,
	.enable_irq_window = enable_irq_window,
	.update_cr8_intercept = update_cr8_intercept,
7211
	.set_virtual_apic_mode = svm_set_virtual_apic_mode,
7212 7213
	.get_enable_apicv = svm_get_enable_apicv,
	.refresh_apicv_exec_ctrl = svm_refresh_apicv_exec_ctrl,
7214
	.load_eoi_exitmap = svm_load_eoi_exitmap,
7215 7216
	.hwapic_irr_update = svm_hwapic_irr_update,
	.hwapic_isr_update = svm_hwapic_isr_update,
7217
	.sync_pir_to_irr = kvm_lapic_find_highest_irr,
7218
	.apicv_post_state_restore = avic_post_state_restore,
7219 7220

	.set_tss_addr = svm_set_tss_addr,
7221
	.set_identity_map_addr = svm_set_identity_map_addr,
7222
	.get_tdp_level = get_npt_level,
7223
	.get_mt_mask = svm_get_mt_mask,
7224

7225 7226
	.get_exit_info = svm_get_exit_info,

7227
	.get_lpage_level = svm_get_lpage_level,
7228 7229

	.cpuid_update = svm_cpuid_update,
7230 7231

	.rdtscp_supported = svm_rdtscp_supported,
7232
	.invpcid_supported = svm_invpcid_supported,
7233
	.mpx_supported = svm_mpx_supported,
7234
	.xsaves_supported = svm_xsaves_supported,
7235
	.umip_emulated = svm_umip_emulated,
7236
	.pt_supported = svm_pt_supported,
7237 7238

	.set_supported_cpuid = svm_set_supported_cpuid,
7239 7240

	.has_wbinvd_exit = svm_has_wbinvd_exit,
7241

7242
	.read_l1_tsc_offset = svm_read_l1_tsc_offset,
7243
	.write_l1_tsc_offset = svm_write_l1_tsc_offset,
7244 7245

	.set_tdp_cr3 = set_tdp_cr3,
7246 7247

	.check_intercept = svm_check_intercept,
7248
	.handle_external_intr = svm_handle_external_intr,
7249

7250 7251
	.request_immediate_exit = __kvm_request_immediate_exit,

7252
	.sched_in = svm_sched_in,
7253 7254

	.pmu_ops = &amd_pmu_ops,
7255
	.deliver_posted_interrupt = svm_deliver_avic_intr,
7256
	.update_pi_irte = svm_update_pi_irte,
7257
	.setup_mce = svm_setup_mce,
7258

7259
	.smi_allowed = svm_smi_allowed,
7260 7261
	.pre_enter_smm = svm_pre_enter_smm,
	.pre_leave_smm = svm_pre_leave_smm,
7262
	.enable_smi_window = enable_smi_window,
B
Brijesh Singh 已提交
7263 7264

	.mem_enc_op = svm_mem_enc_op,
7265 7266
	.mem_enc_reg_region = svm_register_enc_region,
	.mem_enc_unreg_region = svm_unregister_enc_region,
7267 7268

	.nested_enable_evmcs = nested_enable_evmcs,
7269
	.nested_get_evmcs_version = nested_get_evmcs_version,
7270 7271

	.need_emulation_on_page_fault = svm_need_emulation_on_page_fault,
A
Avi Kivity 已提交
7272 7273 7274 7275
};

static int __init svm_init(void)
{
7276
	return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm),
7277
			__alignof__(struct vcpu_svm), THIS_MODULE);
A
Avi Kivity 已提交
7278 7279 7280 7281
}

static void __exit svm_exit(void)
{
7282
	kvm_exit();
A
Avi Kivity 已提交
7283 7284 7285 7286
}

module_init(svm_init)
module_exit(svm_exit)