blob: dea2e7e962e3e0648c9ecaaaffc5cb723b32f299 [file] [log] [blame]
* Kernel-based Virtual Machine driver for Linux
* This header defines architecture specific interfaces, x86 version
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
#ifndef _ASM_X86_KVM_HOST_H
#define _ASM_X86_KVM_HOST_H
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/mmu_notifier.h>
#include <linux/tracepoint.h>
#include <linux/cpumask.h>
#include <linux/irq_work.h>
#include <linux/kvm.h>
#include <linux/kvm_para.h>
#include <linux/kvm_types.h>
#include <linux/perf_event.h>
#include <linux/pvclock_gtod.h>
#include <linux/clocksource.h>
#include <asm/pvclock-abi.h>
#include <asm/desc.h>
#include <asm/mtrr.h>
#include <asm/msr-index.h>
#include <asm/asm.h>
#define KVM_MAX_VCPUS 255
#define KVM_SOFT_MAX_VCPUS 160
#define KVM_USER_MEM_SLOTS 509
/* memory slots that are not exposed to userspace */
(~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
| X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
| X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
#define CR3_PCID_INVD BIT_64(63)
(~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
| X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
| X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR | X86_CR4_PCIDE \
#define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
#define INVALID_PAGE (~(hpa_t)0)
#define VALID_PAGE(x) ((x) != INVALID_PAGE)
#define UNMAPPED_GVA (~(gpa_t)0)
/* KVM Hugepage definitions for x86 */
#define KVM_HPAGE_GFN_SHIFT(x) (((x) - 1) * 9)
#define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1))
static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
(base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
#define KVM_NR_VAR_MTRR 8
#define ASYNC_PF_PER_VCPU 64
enum kvm_reg {
#ifdef CONFIG_X86_64
VCPU_REGS_R10 = 10,
VCPU_REGS_R11 = 11,
VCPU_REGS_R12 = 12,
VCPU_REGS_R13 = 13,
VCPU_REGS_R14 = 14,
VCPU_REGS_R15 = 15,
enum kvm_reg_ex {
enum {
#include <asm/kvm_emulate.h>
#define KVM_NR_MEM_OBJS 40
#define KVM_NR_DB_REGS 4
#define DR6_BD (1 << 13)
#define DR6_BS (1 << 14)
#define DR6_RTM (1 << 16)
#define DR6_FIXED_1 0xfffe0ff0
#define DR6_INIT 0xffff0ff0
#define DR6_VOLATILE 0x0001e00f
#define DR7_BP_EN_MASK 0x000000ff
#define DR7_GE (1 << 9)
#define DR7_GD (1 << 13)
#define DR7_FIXED_1 0x00000400
#define DR7_VOLATILE 0xffff2bff
#define PFERR_USER_BIT 2
#define PFERR_RSVD_BIT 3
/* apic attention bits */
* The following bit is set with PV-EOI, unset on EOI.
* We detect PV-EOI changes by guest by comparing
* this bit with PV-EOI in guest memory.
* See the implementation in apic_update_pv_eoi.
* We don't want allocation failures within the mmu code, so we preallocate
* enough memory for a single page fault in a cache.
struct kvm_mmu_memory_cache {
int nobjs;
void *objects[KVM_NR_MEM_OBJS];
* kvm_mmu_page_role, below, is defined as:
* bits 0:3 - total guest paging levels (2-4, or zero for real mode)
* bits 4:7 - page table level for this shadow (1-4)
* bits 8:9 - page table quadrant for 2-level guests
* bit 16 - direct mapping of virtual to physical mapping at gfn
* used for real mode and two-dimensional paging
* bits 17:19 - common access permissions for all ptes in this shadow page
union kvm_mmu_page_role {
unsigned word;
struct {
unsigned level:4;
unsigned cr4_pae:1;
unsigned quadrant:2;
unsigned pad_for_nice_hex_output:6;
unsigned direct:1;
unsigned access:3;
unsigned invalid:1;
unsigned nxe:1;
unsigned cr0_wp:1;
unsigned smep_andnot_wp:1;
struct kvm_mmu_page {
struct list_head link;
struct hlist_node hash_link;
* The following two entries are used to key the shadow page in the
* hash table.
gfn_t gfn;
union kvm_mmu_page_role role;
u64 *spt;
/* hold the gfn of each spte inside spt */
gfn_t *gfns;
bool unsync;
int root_count; /* Currently serving as active root */
unsigned int unsync_children;
unsigned long parent_ptes; /* Reverse mapping for parent_pte */
/* The page is obsolete if mmu_valid_gen != kvm->arch.mmu_valid_gen. */
unsigned long mmu_valid_gen;
DECLARE_BITMAP(unsync_child_bitmap, 512);
#ifdef CONFIG_X86_32
* Used out of the mmu-lock to avoid reading spte values while an
* update is in progress; see the comments in __get_spte_lockless().
int clear_spte_count;
/* Number of writes since the last time traversal visited this page. */
int write_flooding_count;
struct kvm_pio_request {
unsigned long count;
int in;
int port;
int size;
* x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
* 32-bit). The kvm_mmu structure abstracts the details of the current mmu
* mode.
struct kvm_mmu {
void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root);
unsigned long (*get_cr3)(struct kvm_vcpu *vcpu);
u64 (*get_pdptr)(struct kvm_vcpu *vcpu, int index);
int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err,
bool prefault);
void (*inject_page_fault)(struct kvm_vcpu *vcpu,
struct x86_exception *fault);
gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access,
struct x86_exception *exception);
gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access,
struct x86_exception *exception);
int (*sync_page)(struct kvm_vcpu *vcpu,
struct kvm_mmu_page *sp);
void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
void (*update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
u64 *spte, const void *pte);
hpa_t root_hpa;
int root_level;
int shadow_root_level;
union kvm_mmu_page_role base_role;
bool direct_map;
* Bitmap; bit set = permission fault
* Byte index: page fault error code [4:1]
* Bit index: pte permissions in ACC_* format
u8 permissions[16];
u64 *pae_root;
u64 *lm_root;
u64 rsvd_bits_mask[2][4];
u64 bad_mt_xwr;
* Bitmap: bit set = last pte in walk
* index[0:1]: level (zero-based)
* index[2]:
u8 last_pte_bitmap;
bool nx;
u64 pdptrs[4]; /* pae */
enum pmc_type {
struct kvm_pmc {
enum pmc_type type;
u8 idx;
u64 counter;
u64 eventsel;
struct perf_event *perf_event;
struct kvm_vcpu *vcpu;
struct kvm_pmu {
unsigned nr_arch_gp_counters;
unsigned nr_arch_fixed_counters;
unsigned available_event_types;
u64 fixed_ctr_ctrl;
u64 global_ctrl;
u64 global_status;
u64 global_ovf_ctrl;
u64 counter_bitmask[2];
u64 global_ctrl_mask;
u64 reserved_bits;
u8 version;
struct kvm_pmc gp_counters[INTEL_PMC_MAX_GENERIC];
struct kvm_pmc fixed_counters[INTEL_PMC_MAX_FIXED];
struct irq_work irq_work;
u64 reprogram_pmi;
enum {
struct kvm_vcpu_arch {
* rip and regs accesses must go through
* kvm_{register,rip}_{read,write} functions.
unsigned long regs[NR_VCPU_REGS];
u32 regs_avail;
u32 regs_dirty;
unsigned long cr0;
unsigned long cr0_guest_owned_bits;
unsigned long cr2;
unsigned long cr3;
unsigned long cr4;
unsigned long cr4_guest_owned_bits;
unsigned long cr8;
u32 hflags;
u64 efer;
u64 apic_base;
struct kvm_lapic *apic; /* kernel irqchip context */
unsigned long apic_attention;
int32_t apic_arb_prio;
int mp_state;
u64 ia32_misc_enable_msr;
bool tpr_access_reporting;
u64 ia32_xss;
* Paging state of the vcpu
* If the vcpu runs in guest mode with two level paging this still saves
* the paging mode of the l1 guest. This context is always used to
* handle faults.
struct kvm_mmu mmu;
* Paging state of an L2 guest (used for nested npt)
* This context will save all necessary information to walk page tables
* of the an L2 guest. This context is only initialized for page table
* walking and not for faulting since we never handle l2 page faults on
* the host.
struct kvm_mmu nested_mmu;
* Pointer to the mmu context currently used for
* gva_to_gpa translations.
struct kvm_mmu *walk_mmu;
struct kvm_mmu_memory_cache mmu_pte_list_desc_cache;
struct kvm_mmu_memory_cache mmu_page_cache;
struct kvm_mmu_memory_cache mmu_page_header_cache;
struct fpu guest_fpu;
u64 xcr0;
u64 guest_supported_xcr0;
u32 guest_xstate_size;
struct kvm_pio_request pio;
void *pio_data;
u8 event_exit_inst_len;
struct kvm_queued_exception {
bool pending;
bool has_error_code;
bool reinject;
u8 nr;
u32 error_code;
} exception;
struct kvm_queued_interrupt {
bool pending;
bool soft;
u8 nr;
} interrupt;
int halt_request; /* real mode on Intel only */
int cpuid_nent;
struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
int maxphyaddr;
/* emulate context */
struct x86_emulate_ctxt emulate_ctxt;
bool emulate_regs_need_sync_to_vcpu;
bool emulate_regs_need_sync_from_vcpu;
int (*complete_userspace_io)(struct kvm_vcpu *vcpu);
gpa_t time;
struct pvclock_vcpu_time_info hv_clock;
unsigned int hw_tsc_khz;
struct gfn_to_hva_cache pv_time;
bool pv_time_enabled;
/* set guest stopped flag in pvclock flags field */
bool pvclock_set_guest_stopped_request;
struct {
u64 msr_val;
u64 last_steal;
u64 accum_steal;
struct gfn_to_hva_cache stime;
struct kvm_steal_time steal;
} st;
u64 last_guest_tsc;
u64 last_host_tsc;
u64 tsc_offset_adjustment;
u64 this_tsc_nsec;
u64 this_tsc_write;
u64 this_tsc_generation;
bool tsc_catchup;
bool tsc_always_catchup;
s8 virtual_tsc_shift;
u32 virtual_tsc_mult;
u32 virtual_tsc_khz;
s64 ia32_tsc_adjust_msr;
atomic_t nmi_queued; /* unprocessed asynchronous NMIs */
unsigned nmi_pending; /* NMI queued after currently running handler */
bool nmi_injected; /* Trying to inject an NMI this entry */
struct mtrr_state_type mtrr_state;
u64 pat;
unsigned switch_db_regs;
unsigned long db[KVM_NR_DB_REGS];
unsigned long dr6;
unsigned long dr7;
unsigned long eff_db[KVM_NR_DB_REGS];
unsigned long guest_debug_dr7;
u64 mcg_cap;
u64 mcg_status;
u64 mcg_ctl;
u64 *mce_banks;
/* Cache MMIO info */
u64 mmio_gva;
unsigned access;
gfn_t mmio_gfn;
u64 mmio_gen;
struct kvm_pmu pmu;
/* used for guest single stepping over the given code position */
unsigned long singlestep_rip;
/* fields used by HYPER-V emulation */
u64 hv_vapic;
cpumask_var_t wbinvd_dirty_mask;
unsigned long last_retry_eip;
unsigned long last_retry_addr;
struct {
bool halted;
gfn_t gfns[roundup_pow_of_two(ASYNC_PF_PER_VCPU)];
struct gfn_to_hva_cache data;
u64 msr_val;
u32 id;
bool send_user_only;
} apf;
/* OSVW MSRs (AMD only) */
struct {
u64 length;
u64 status;
} osvw;
struct {
u64 msr_val;
struct gfn_to_hva_cache data;
} pv_eoi;
* Indicate whether the access faults on its page table in guest
* which is set when fix page fault and used to detect unhandeable
* instruction.
bool write_fault_to_shadow_pgtable;
/* set at EPT violation at this point */
unsigned long exit_qualification;
/* pv related host specific info */
struct {
bool pv_unhalted;
} pv;
struct kvm_lpage_info {
int write_count;
struct kvm_arch_memory_slot {
unsigned long *rmap[KVM_NR_PAGE_SIZES];
struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1];
* We use as the mode the number of bits allocated in the LDR for the
* logical processor ID. It happens that these are all powers of two.
* This makes it is very easy to detect cases where the APICs are
* configured for multiple modes; in that case, we cannot use the map and
* hence cannot use kvm_irq_delivery_to_apic_fast either.
struct kvm_apic_map {
struct rcu_head rcu;
u8 mode;
struct kvm_lapic *phys_map[256];
/* first index is cluster id second is cpu id in a cluster */
struct kvm_lapic *logical_map[16][16];
struct kvm_arch {
unsigned int n_used_mmu_pages;
unsigned int n_requested_mmu_pages;
unsigned int n_max_mmu_pages;
unsigned int indirect_shadow_pages;
unsigned long mmu_valid_gen;
struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
* Hash table of struct kvm_mmu_page.
struct list_head active_mmu_pages;
struct list_head zapped_obsolete_pages;
struct list_head assigned_dev_head;
struct iommu_domain *iommu_domain;
bool iommu_noncoherent;
atomic_t noncoherent_dma_count;
struct kvm_pic *vpic;
struct kvm_ioapic *vioapic;
struct kvm_pit *vpit;
int vapics_in_nmi_mode;
struct mutex apic_map_lock;
struct kvm_apic_map *apic_map;
unsigned int tss_addr;
bool apic_access_page_done;
gpa_t wall_clock;
bool ept_identity_pagetable_done;
gpa_t ept_identity_map_addr;
unsigned long irq_sources_bitmap;
s64 kvmclock_offset;
raw_spinlock_t tsc_write_lock;
u64 last_tsc_nsec;
u64 last_tsc_write;
u32 last_tsc_khz;
u64 cur_tsc_nsec;
u64 cur_tsc_write;
u64 cur_tsc_offset;
u64 cur_tsc_generation;
int nr_vcpus_matched_tsc;
spinlock_t pvclock_gtod_sync_lock;
bool use_master_clock;
u64 master_kernel_ns;
cycle_t master_cycle_now;
struct delayed_work kvmclock_update_work;
struct delayed_work kvmclock_sync_work;
struct kvm_xen_hvm_config xen_hvm_config;
/* reads protected by irq_srcu, writes by irq_lock */
struct hlist_head mask_notifier_list;
/* fields used by HYPER-V emulation */
u64 hv_guest_os_id;
u64 hv_hypercall;
u64 hv_tsc_page;
int audit_point;
bool boot_vcpu_runs_old_kvmclock;
struct kvm_vm_stat {
u32 mmu_shadow_zapped;
u32 mmu_pte_write;
u32 mmu_pte_updated;
u32 mmu_pde_zapped;
u32 mmu_flooded;
u32 mmu_recycled;
u32 mmu_cache_miss;
u32 mmu_unsync;
u32 remote_tlb_flush;
u32 lpages;
struct kvm_vcpu_stat {
u32 pf_fixed;
u32 pf_guest;
u32 tlb_flush;
u32 invlpg;
u32 exits;
u32 io_exits;
u32 mmio_exits;
u32 signal_exits;
u32 irq_window_exits;
u32 nmi_window_exits;
u32 halt_exits;
u32 halt_successful_poll;
u32 halt_wakeup;
u32 request_irq_exits;
u32 irq_exits;
u32 host_state_reload;
u32 efer_reload;
u32 fpu_reload;
u32 insn_emulation;
u32 insn_emulation_fail;
u32 hypercalls;
u32 irq_injections;
u32 nmi_injections;
struct x86_instruction_info;
struct msr_data {
bool host_initiated;
u32 index;
u64 data;
struct kvm_lapic_irq {
u32 vector;
u32 delivery_mode;
u32 dest_mode;
u32 level;
u32 trig_mode;
u32 shorthand;
u32 dest_id;
struct kvm_x86_ops {
int (*cpu_has_kvm_support)(void); /* __init */
int (*disabled_by_bios)(void); /* __init */
int (*hardware_enable)(void);
void (*hardware_disable)(void);
void (*check_processor_compatibility)(void *rtn);
int (*hardware_setup)(void); /* __init */
void (*hardware_unsetup)(void); /* __exit */
bool (*cpu_has_accelerated_tpr)(void);
void (*cpuid_update)(struct kvm_vcpu *vcpu);
/* Create, but do not attach this VCPU */
struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
void (*vcpu_free)(struct kvm_vcpu *vcpu);
void (*vcpu_reset)(struct kvm_vcpu *vcpu);
void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
void (*vcpu_put)(struct kvm_vcpu *vcpu);
void (*update_db_bp_intercept)(struct kvm_vcpu *vcpu);
int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr);
u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
void (*get_segment)(struct kvm_vcpu *vcpu,
struct kvm_segment *var, int seg);
int (*get_cpl)(struct kvm_vcpu *vcpu);
void (*set_segment)(struct kvm_vcpu *vcpu,
struct kvm_segment *var, int seg);
void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu);
void (*decache_cr3)(struct kvm_vcpu *vcpu);
void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
int (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
u64 (*get_dr6)(struct kvm_vcpu *vcpu);
void (*set_dr6)(struct kvm_vcpu *vcpu, unsigned long value);
void (*sync_dirty_debug_regs)(struct kvm_vcpu *vcpu);
void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value);
void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
void (*fpu_deactivate)(struct kvm_vcpu *vcpu);
void (*tlb_flush)(struct kvm_vcpu *vcpu);
void (*run)(struct kvm_vcpu *vcpu);
int (*handle_exit)(struct kvm_vcpu *vcpu);
void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu);
void (*patch_hypercall)(struct kvm_vcpu *vcpu,
unsigned char *hypercall_addr);
void (*set_irq)(struct kvm_vcpu *vcpu);
void (*set_nmi)(struct kvm_vcpu *vcpu);
void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
bool has_error_code, u32 error_code,
bool reinject);
void (*cancel_injection)(struct kvm_vcpu *vcpu);
int (*interrupt_allowed)(struct kvm_vcpu *vcpu);
int (*nmi_allowed)(struct kvm_vcpu *vcpu);
bool (*get_nmi_mask)(struct kvm_vcpu *vcpu);
void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked);
void (*enable_nmi_window)(struct kvm_vcpu *vcpu);
void (*enable_irq_window)(struct kvm_vcpu *vcpu);
void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr);
int (*vm_has_apicv)(struct kvm *kvm);
void (*hwapic_irr_update)(struct kvm_vcpu *vcpu, int max_irr);
void (*hwapic_isr_update)(struct kvm *kvm, int isr);
void (*load_eoi_exitmap)(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap);
void (*set_virtual_x2apic_mode)(struct kvm_vcpu *vcpu, bool set);
void (*set_apic_access_page_addr)(struct kvm_vcpu *vcpu, hpa_t hpa);
void (*deliver_posted_interrupt)(struct kvm_vcpu *vcpu, int vector);
void (*sync_pir_to_irr)(struct kvm_vcpu *vcpu);
int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
int (*get_tdp_level)(void);
u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio);
int (*get_lpage_level)(void);
bool (*rdtscp_supported)(void);
bool (*invpcid_supported)(void);
void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment, bool host);
void (*set_tdp_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry);
bool (*has_wbinvd_exit)(void);
void (*set_tsc_khz)(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale);
u64 (*read_tsc_offset)(struct kvm_vcpu *vcpu);
void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset);
u64 (*compute_tsc_offset)(struct kvm_vcpu *vcpu, u64 target_tsc);
u64 (*read_l1_tsc)(struct kvm_vcpu *vcpu, u64 host_tsc);
void (*get_exit_info)(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2);
int (*check_intercept)(struct kvm_vcpu *vcpu,
struct x86_instruction_info *info,
enum x86_intercept_stage stage);
void (*handle_external_intr)(struct kvm_vcpu *vcpu);
bool (*mpx_supported)(void);
bool (*xsaves_supported)(void);
int (*check_nested_events)(struct kvm_vcpu *vcpu, bool external_intr);
void (*sched_in)(struct kvm_vcpu *kvm, int cpu);
* Arch-specific dirty logging hooks. These hooks are only supposed to
* be valid if the specific arch has hardware-accelerated dirty logging
* mechanism. Currently only for PML on VMX.
* - slot_enable_log_dirty:
* called when enabling log dirty mode for the slot.
* - slot_disable_log_dirty:
* called when disabling log dirty mode for the slot.
* also called when slot is created with log dirty disabled.
* - flush_log_dirty:
* called before reporting dirty_bitmap to userspace.
* - enable_log_dirty_pt_masked:
* called when reenabling log dirty for the GFNs in the mask after
* corresponding bits are cleared in slot->dirty_bitmap.
void (*slot_enable_log_dirty)(struct kvm *kvm,
struct kvm_memory_slot *slot);
void (*slot_disable_log_dirty)(struct kvm *kvm,
struct kvm_memory_slot *slot);
void (*flush_log_dirty)(struct kvm *kvm);
void (*enable_log_dirty_pt_masked)(struct kvm *kvm,
struct kvm_memory_slot *slot,
gfn_t offset, unsigned long mask);
struct kvm_arch_async_pf {
u32 token;
gfn_t gfn;
unsigned long cr3;
bool direct_map;
extern struct kvm_x86_ops *kvm_x86_ops;
static inline void adjust_tsc_offset_guest(struct kvm_vcpu *vcpu,
s64 adjustment)
kvm_x86_ops->adjust_tsc_offset(vcpu, adjustment, false);
static inline void adjust_tsc_offset_host(struct kvm_vcpu *vcpu, s64 adjustment)
kvm_x86_ops->adjust_tsc_offset(vcpu, adjustment, true);
int kvm_mmu_module_init(void);
void kvm_mmu_module_exit(void);
void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
int kvm_mmu_create(struct kvm_vcpu *vcpu);
void kvm_mmu_setup(struct kvm_vcpu *vcpu);
void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
u64 dirty_mask, u64 nx_mask, u64 x_mask);
void kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
void kvm_mmu_slot_remove_write_access(struct kvm *kvm,
struct kvm_memory_slot *memslot);
void kvm_mmu_zap_collapsible_sptes(struct kvm *kvm,
struct kvm_memory_slot *memslot);
void kvm_mmu_slot_leaf_clear_dirty(struct kvm *kvm,
struct kvm_memory_slot *memslot);
void kvm_mmu_slot_largepage_remove_write_access(struct kvm *kvm,
struct kvm_memory_slot *memslot);
void kvm_mmu_slot_set_dirty(struct kvm *kvm,
struct kvm_memory_slot *memslot);
void kvm_mmu_clear_dirty_pt_masked(struct kvm *kvm,
struct kvm_memory_slot *slot,
gfn_t gfn_offset, unsigned long mask);
void kvm_mmu_zap_all(struct kvm *kvm);
void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm);
unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3);
int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
const void *val, int bytes);
u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn);
struct kvm_irq_mask_notifier {
void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
int irq;
struct hlist_node link;
void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
struct kvm_irq_mask_notifier *kimn);
void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
struct kvm_irq_mask_notifier *kimn);
void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
bool mask);
extern bool tdp_enabled;
u64 vcpu_tsc_khz(struct kvm_vcpu *vcpu);
/* control of guest tsc rate supported? */
extern bool kvm_has_tsc_control;
/* minimum supported tsc_khz for guests */
extern u32 kvm_min_guest_tsc_khz;
/* maximum supported tsc_khz for guests */
extern u32 kvm_max_guest_tsc_khz;
enum emulation_result {
EMULATE_DONE, /* no further processing */
EMULATE_USER_EXIT, /* kvm_run ready for userspace exit */
EMULATE_FAIL, /* can't emulate this instruction */
#define EMULTYPE_NO_DECODE (1 << 0)
#define EMULTYPE_TRAP_UD (1 << 1)
#define EMULTYPE_SKIP (1 << 2)
#define EMULTYPE_RETRY (1 << 3)
#define EMULTYPE_NO_REEXECUTE (1 << 4)
int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2,
int emulation_type, void *insn, int insn_len);
static inline int emulate_instruction(struct kvm_vcpu *vcpu,
int emulation_type)
return x86_emulate_instruction(vcpu, 0, emulation_type, NULL, 0);
void kvm_enable_efer_bits(u64);
bool kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer);
int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
int kvm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr);
struct x86_emulate_ctxt;
int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port);
void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
int kvm_emulate_halt(struct kvm_vcpu *vcpu);
int kvm_vcpu_halt(struct kvm_vcpu *vcpu);
int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu);
void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg);
void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector);
int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index,
int reason, bool has_error_code, u32 error_code);
int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val);
int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val);
unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr);
int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr);
unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu);
void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags);
bool kvm_rdpmc(struct kvm_vcpu *vcpu);
void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr);
void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault);
int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
gfn_t gfn, void *data, int offset, int len,
u32 access);
bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl);
bool kvm_require_dr(struct kvm_vcpu *vcpu, int dr);
static inline int __kvm_irq_line_state(unsigned long *irq_state,
int irq_source_id, int level)
/* Logical OR for level trig interrupt */
if (level)
__set_bit(irq_source_id, irq_state);
__clear_bit(irq_source_id, irq_state);
return !!(*irq_state);
int kvm_pic_set_irq(struct kvm_pic *pic, int irq, int irq_source_id, int level);
void kvm_pic_clear_all(struct kvm_pic *pic, int irq_source_id);
void kvm_inject_nmi(struct kvm_vcpu *vcpu);
int fx_init(struct kvm_vcpu *vcpu);
void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
const u8 *new, int bytes);
int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn);
int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
int kvm_mmu_load(struct kvm_vcpu *vcpu);
void kvm_mmu_unload(struct kvm_vcpu *vcpu);
void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access,
struct x86_exception *exception);
gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva,
struct x86_exception *exception);
gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva,
struct x86_exception *exception);
gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva,
struct x86_exception *exception);
gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva,
struct x86_exception *exception);
int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code,
void *insn, int insn_len);
void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
void kvm_mmu_new_cr3(struct kvm_vcpu *vcpu);
void kvm_enable_tdp(void);
void kvm_disable_tdp(void);
static inline gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access,
struct x86_exception *exception)
return gpa;
static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
return (struct kvm_mmu_page *)page_private(page);
static inline u16 kvm_read_ldt(void)
u16 ldt;
asm("sldt %0" : "=g"(ldt));
return ldt;
static inline void kvm_load_ldt(u16 sel)
asm("lldt %0" : : "rm"(sel));
#ifdef CONFIG_X86_64
static inline unsigned long read_msr(unsigned long msr)
u64 value;
rdmsrl(msr, value);
return value;
static inline u32 get_rdx_init_val(void)
return 0x600; /* P6 family */
static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
static inline u64 get_canonical(u64 la)
return ((int64_t)la << 16) >> 16;
static inline bool is_noncanonical_address(u64 la)
#ifdef CONFIG_X86_64
return get_canonical(la) != la;
return false;
#define TSS_BASE_SIZE 0x68
#define TSS_IOPB_SIZE (65536 / 8)
#define TSS_REDIRECTION_SIZE (256 / 8)
#define RMODE_TSS_SIZE \
enum {
#define HF_GIF_MASK (1 << 0)
#define HF_HIF_MASK (1 << 1)
#define HF_VINTR_MASK (1 << 2)
#define HF_NMI_MASK (1 << 3)
#define HF_IRET_MASK (1 << 4)
#define HF_GUEST_MASK (1 << 5) /* VCPU is in guest-mode */
* Hardware virtualization extension instructions may fault if a
* reboot turns off virtualization while processes are running.
* Trap the fault and ignore the instruction if that happens.
asmlinkage void kvm_spurious_fault(void);
#define ____kvm_handle_fault_on_reboot(insn, cleanup_insn) \
"666: " insn "\n\t" \
"668: \n\t" \
".pushsection .fixup, \"ax\" \n" \
"667: \n\t" \
cleanup_insn "\n\t" \
"cmpb $0, kvm_rebooting \n\t" \
"jne 668b \n\t" \
__ASM_SIZE(push) " $666b \n\t" \
"call kvm_spurious_fault \n\t" \
".popsection \n\t" \
_ASM_EXTABLE(666b, 667b)
#define __kvm_handle_fault_on_reboot(insn) \
____kvm_handle_fault_on_reboot(insn, "")
int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end);
int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
int kvm_cpu_has_injectable_intr(struct kvm_vcpu *v);
int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu);
int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu);
int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
void kvm_vcpu_reset(struct kvm_vcpu *vcpu);
void kvm_vcpu_reload_apic_access_page(struct kvm_vcpu *vcpu);
void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm,
unsigned long address);
void kvm_define_shared_msr(unsigned index, u32 msr);
int kvm_set_shared_msr(unsigned index, u64 val, u64 mask);
unsigned long kvm_get_linear_rip(struct kvm_vcpu *vcpu);
bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip);
void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
struct kvm_async_pf *work);
void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
struct kvm_async_pf *work);
void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
struct kvm_async_pf *work);
bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu);
extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn);
void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err);
int kvm_is_in_guest(void);
void kvm_pmu_init(struct kvm_vcpu *vcpu);
void kvm_pmu_destroy(struct kvm_vcpu *vcpu);
void kvm_pmu_reset(struct kvm_vcpu *vcpu);
void kvm_pmu_cpuid_update(struct kvm_vcpu *vcpu);
bool kvm_pmu_msr(struct kvm_vcpu *vcpu, u32 msr);
int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
int kvm_pmu_check_pmc(struct kvm_vcpu *vcpu, unsigned pmc);
int kvm_pmu_read_pmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data);
void kvm_handle_pmu_event(struct kvm_vcpu *vcpu);
void kvm_deliver_pmi(struct kvm_vcpu *vcpu);
#endif /* _ASM_X86_KVM_HOST_H */