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Diffstat (limited to '')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 1759 |
1 files changed, 1759 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h new file mode 100644 index 000000000..3e9f1c820 --- /dev/null +++ b/arch/x86/include/asm/kvm_host.h @@ -0,0 +1,1759 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Kernel-based Virtual Machine driver for Linux + * + * This header defines architecture specific interfaces, x86 version + */ + +#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/irq.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 <linux/irqbypass.h> +#include <linux/hyperv.h> + +#include <asm/apic.h> +#include <asm/pvclock-abi.h> +#include <asm/desc.h> +#include <asm/mtrr.h> +#include <asm/msr-index.h> +#include <asm/asm.h> +#include <asm/kvm_page_track.h> +#include <asm/kvm_vcpu_regs.h> +#include <asm/hyperv-tlfs.h> + +#define __KVM_HAVE_ARCH_VCPU_DEBUGFS + +#define KVM_MAX_VCPUS 288 +#define KVM_SOFT_MAX_VCPUS 240 +#define KVM_MAX_VCPU_ID 1023 +#define KVM_USER_MEM_SLOTS 509 +/* memory slots that are not exposed to userspace */ +#define KVM_PRIVATE_MEM_SLOTS 3 +#define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS) + +#define KVM_HALT_POLL_NS_DEFAULT 200000 + +#define KVM_IRQCHIP_NUM_PINS KVM_IOAPIC_NUM_PINS + +#define KVM_DIRTY_LOG_MANUAL_CAPS (KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE | \ + KVM_DIRTY_LOG_INITIALLY_SET) + +/* x86-specific vcpu->requests bit members */ +#define KVM_REQ_MIGRATE_TIMER KVM_ARCH_REQ(0) +#define KVM_REQ_REPORT_TPR_ACCESS KVM_ARCH_REQ(1) +#define KVM_REQ_TRIPLE_FAULT KVM_ARCH_REQ(2) +#define KVM_REQ_MMU_SYNC KVM_ARCH_REQ(3) +#define KVM_REQ_CLOCK_UPDATE KVM_ARCH_REQ(4) +#define KVM_REQ_LOAD_MMU_PGD KVM_ARCH_REQ(5) +#define KVM_REQ_EVENT KVM_ARCH_REQ(6) +#define KVM_REQ_APF_HALT KVM_ARCH_REQ(7) +#define KVM_REQ_STEAL_UPDATE KVM_ARCH_REQ(8) +#define KVM_REQ_NMI KVM_ARCH_REQ(9) +#define KVM_REQ_PMU KVM_ARCH_REQ(10) +#define KVM_REQ_PMI KVM_ARCH_REQ(11) +#define KVM_REQ_SMI KVM_ARCH_REQ(12) +#define KVM_REQ_MASTERCLOCK_UPDATE KVM_ARCH_REQ(13) +#define KVM_REQ_MCLOCK_INPROGRESS \ + KVM_ARCH_REQ_FLAGS(14, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) +#define KVM_REQ_SCAN_IOAPIC \ + KVM_ARCH_REQ_FLAGS(15, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) +#define KVM_REQ_GLOBAL_CLOCK_UPDATE KVM_ARCH_REQ(16) +#define KVM_REQ_APIC_PAGE_RELOAD \ + KVM_ARCH_REQ_FLAGS(17, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) +#define KVM_REQ_HV_CRASH KVM_ARCH_REQ(18) +#define KVM_REQ_IOAPIC_EOI_EXIT KVM_ARCH_REQ(19) +#define KVM_REQ_HV_RESET KVM_ARCH_REQ(20) +#define KVM_REQ_HV_EXIT KVM_ARCH_REQ(21) +#define KVM_REQ_HV_STIMER KVM_ARCH_REQ(22) +#define KVM_REQ_LOAD_EOI_EXITMAP KVM_ARCH_REQ(23) +#define KVM_REQ_GET_NESTED_STATE_PAGES KVM_ARCH_REQ(24) +#define KVM_REQ_APICV_UPDATE \ + KVM_ARCH_REQ_FLAGS(25, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) +#define KVM_REQ_TLB_FLUSH_CURRENT KVM_ARCH_REQ(26) +#define KVM_REQ_TLB_FLUSH_GUEST \ + KVM_ARCH_REQ_FLAGS(27, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) +#define KVM_REQ_APF_READY KVM_ARCH_REQ(28) +#define KVM_REQ_MSR_FILTER_CHANGED KVM_ARCH_REQ(29) + +#define CR0_RESERVED_BITS \ + (~(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 CR4_RESERVED_BITS \ + (~(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 \ + | X86_CR4_OSXSAVE | X86_CR4_SMEP | X86_CR4_FSGSBASE \ + | X86_CR4_OSXMMEXCPT | X86_CR4_LA57 | X86_CR4_VMXE \ + | X86_CR4_SMAP | X86_CR4_PKE | X86_CR4_UMIP)) + +#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_MAX_HUGEPAGE_LEVEL PG_LEVEL_1G +#define KVM_NR_PAGE_SIZES (KVM_MAX_HUGEPAGE_LEVEL - PG_LEVEL_4K + 1) +#define KVM_HPAGE_GFN_SHIFT(x) (((x) - 1) * 9) +#define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + KVM_HPAGE_GFN_SHIFT(x)) +#define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x)) +#define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1)) +#define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE) + +static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level) +{ + /* KVM_HPAGE_GFN_SHIFT(PG_LEVEL_4K) must be 0. */ + return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) - + (base_gfn >> KVM_HPAGE_GFN_SHIFT(level)); +} + +#define KVM_PERMILLE_MMU_PAGES 20 +#define KVM_MIN_ALLOC_MMU_PAGES 64UL +#define KVM_MMU_HASH_SHIFT 12 +#define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT) +#define KVM_MIN_FREE_MMU_PAGES 5 +#define KVM_REFILL_PAGES 25 +#define KVM_MAX_CPUID_ENTRIES 256 +#define KVM_NR_FIXED_MTRR_REGION 88 +#define KVM_NR_VAR_MTRR 8 + +#define ASYNC_PF_PER_VCPU 64 + +enum kvm_reg { + VCPU_REGS_RAX = __VCPU_REGS_RAX, + VCPU_REGS_RCX = __VCPU_REGS_RCX, + VCPU_REGS_RDX = __VCPU_REGS_RDX, + VCPU_REGS_RBX = __VCPU_REGS_RBX, + VCPU_REGS_RSP = __VCPU_REGS_RSP, + VCPU_REGS_RBP = __VCPU_REGS_RBP, + VCPU_REGS_RSI = __VCPU_REGS_RSI, + VCPU_REGS_RDI = __VCPU_REGS_RDI, +#ifdef CONFIG_X86_64 + VCPU_REGS_R8 = __VCPU_REGS_R8, + VCPU_REGS_R9 = __VCPU_REGS_R9, + VCPU_REGS_R10 = __VCPU_REGS_R10, + VCPU_REGS_R11 = __VCPU_REGS_R11, + VCPU_REGS_R12 = __VCPU_REGS_R12, + VCPU_REGS_R13 = __VCPU_REGS_R13, + VCPU_REGS_R14 = __VCPU_REGS_R14, + VCPU_REGS_R15 = __VCPU_REGS_R15, +#endif + VCPU_REGS_RIP, + NR_VCPU_REGS, + + VCPU_EXREG_PDPTR = NR_VCPU_REGS, + VCPU_EXREG_CR0, + VCPU_EXREG_CR3, + VCPU_EXREG_CR4, + VCPU_EXREG_RFLAGS, + VCPU_EXREG_SEGMENTS, + VCPU_EXREG_EXIT_INFO_1, + VCPU_EXREG_EXIT_INFO_2, +}; + +enum { + VCPU_SREG_ES, + VCPU_SREG_CS, + VCPU_SREG_SS, + VCPU_SREG_DS, + VCPU_SREG_FS, + VCPU_SREG_GS, + VCPU_SREG_TR, + VCPU_SREG_LDTR, +}; + +enum exit_fastpath_completion { + EXIT_FASTPATH_NONE, + EXIT_FASTPATH_REENTER_GUEST, + EXIT_FASTPATH_EXIT_HANDLED, +}; +typedef enum exit_fastpath_completion fastpath_t; + +struct x86_emulate_ctxt; +struct x86_exception; +enum x86_intercept; +enum x86_intercept_stage; + +#define KVM_NR_DB_REGS 4 + +#define DR6_BD (1 << 13) +#define DR6_BS (1 << 14) +#define DR6_BT (1 << 15) +#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_PRESENT_BIT 0 +#define PFERR_WRITE_BIT 1 +#define PFERR_USER_BIT 2 +#define PFERR_RSVD_BIT 3 +#define PFERR_FETCH_BIT 4 +#define PFERR_PK_BIT 5 +#define PFERR_GUEST_FINAL_BIT 32 +#define PFERR_GUEST_PAGE_BIT 33 + +#define PFERR_PRESENT_MASK (1U << PFERR_PRESENT_BIT) +#define PFERR_WRITE_MASK (1U << PFERR_WRITE_BIT) +#define PFERR_USER_MASK (1U << PFERR_USER_BIT) +#define PFERR_RSVD_MASK (1U << PFERR_RSVD_BIT) +#define PFERR_FETCH_MASK (1U << PFERR_FETCH_BIT) +#define PFERR_PK_MASK (1U << PFERR_PK_BIT) +#define PFERR_GUEST_FINAL_MASK (1ULL << PFERR_GUEST_FINAL_BIT) +#define PFERR_GUEST_PAGE_MASK (1ULL << PFERR_GUEST_PAGE_BIT) + +#define PFERR_NESTED_GUEST_PAGE (PFERR_GUEST_PAGE_MASK | \ + PFERR_WRITE_MASK | \ + PFERR_PRESENT_MASK) + +/* apic attention bits */ +#define KVM_APIC_CHECK_VAPIC 0 +/* + * 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. + */ +#define KVM_APIC_PV_EOI_PENDING 1 + +struct kvm_kernel_irq_routing_entry; + +/* + * the pages used as guest page table on soft mmu are tracked by + * kvm_memory_slot.arch.gfn_track which is 16 bits, so the role bits used + * by indirect shadow page can not be more than 15 bits. + * + * Currently, we used 14 bits that are @level, @gpte_is_8_bytes, @quadrant, @access, + * @nxe, @cr0_wp, @smep_andnot_wp and @smap_andnot_wp. + */ +union kvm_mmu_page_role { + u32 word; + struct { + unsigned level:4; + unsigned gpte_is_8_bytes:1; + unsigned quadrant:2; + unsigned direct:1; + unsigned access:3; + unsigned invalid:1; + unsigned nxe:1; + unsigned cr0_wp:1; + unsigned smep_andnot_wp:1; + unsigned smap_andnot_wp:1; + unsigned ad_disabled:1; + unsigned guest_mode:1; + unsigned :6; + + /* + * This is left at the top of the word so that + * kvm_memslots_for_spte_role can extract it with a + * simple shift. While there is room, give it a whole + * byte so it is also faster to load it from memory. + */ + unsigned smm:8; + }; +}; + +union kvm_mmu_extended_role { +/* + * This structure complements kvm_mmu_page_role caching everything needed for + * MMU configuration. If nothing in both these structures changed, MMU + * re-configuration can be skipped. @valid bit is set on first usage so we don't + * treat all-zero structure as valid data. + */ + u32 word; + struct { + unsigned int valid:1; + unsigned int execonly:1; + unsigned int cr0_pg:1; + unsigned int cr4_pae:1; + unsigned int cr4_pse:1; + unsigned int cr4_pke:1; + unsigned int cr4_smap:1; + unsigned int cr4_smep:1; + unsigned int cr4_la57:1; + unsigned int maxphyaddr:6; + }; +}; + +union kvm_mmu_role { + u64 as_u64; + struct { + union kvm_mmu_page_role base; + union kvm_mmu_extended_role ext; + }; +}; + +struct kvm_rmap_head { + unsigned long val; +}; + +struct kvm_pio_request { + unsigned long linear_rip; + unsigned long count; + int in; + int port; + int size; +}; + +#define PT64_ROOT_MAX_LEVEL 5 + +struct rsvd_bits_validate { + u64 rsvd_bits_mask[2][PT64_ROOT_MAX_LEVEL]; + u64 bad_mt_xwr; +}; + +struct kvm_mmu_root_info { + gpa_t pgd; + hpa_t hpa; +}; + +#define KVM_MMU_ROOT_INFO_INVALID \ + ((struct kvm_mmu_root_info) { .pgd = INVALID_PAGE, .hpa = INVALID_PAGE }) + +#define KVM_MMU_NUM_PREV_ROOTS 3 + +struct kvm_mmu_page; + +/* + * x86 supports 4 paging modes (5-level 64-bit, 4-level 64-bit, 3-level 32-bit, + * and 2-level 32-bit). The kvm_mmu structure abstracts the details of the + * current mmu mode. + */ +struct kvm_mmu { + unsigned long (*get_guest_pgd)(struct kvm_vcpu *vcpu); + u64 (*get_pdptr)(struct kvm_vcpu *vcpu, int index); + int (*page_fault)(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, 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, gpa_t gva_or_gpa, + 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, hpa_t root_hpa); + hpa_t root_hpa; + gpa_t root_pgd; + union kvm_mmu_role mmu_role; + u8 root_level; + u8 shadow_root_level; + u8 ept_ad; + bool direct_map; + struct kvm_mmu_root_info prev_roots[KVM_MMU_NUM_PREV_ROOTS]; + + /* + * Bitmap; bit set = permission fault + * Byte index: page fault error code [4:1] + * Bit index: pte permissions in ACC_* format + */ + u8 permissions[16]; + + /* + * The pkru_mask indicates if protection key checks are needed. It + * consists of 16 domains indexed by page fault error code bits [4:1], + * with PFEC.RSVD replaced by ACC_USER_MASK from the page tables. + * Each domain has 2 bits which are ANDed with AD and WD from PKRU. + */ + u32 pkru_mask; + + u64 *pae_root; + u64 *lm_root; + + /* + * check zero bits on shadow page table entries, these + * bits include not only hardware reserved bits but also + * the bits spte never used. + */ + struct rsvd_bits_validate shadow_zero_check; + + struct rsvd_bits_validate guest_rsvd_check; + + /* Can have large pages at levels 2..last_nonleaf_level-1. */ + u8 last_nonleaf_level; + + bool nx; + + u64 pdptrs[4]; /* pae */ +}; + +struct kvm_tlb_range { + u64 start_gfn; + u64 pages; +}; + +enum pmc_type { + KVM_PMC_GP = 0, + KVM_PMC_FIXED, +}; + +struct kvm_pmc { + enum pmc_type type; + u8 idx; + u64 counter; + u64 eventsel; + struct perf_event *perf_event; + struct kvm_vcpu *vcpu; + /* + * eventsel value for general purpose counters, + * ctrl value for fixed counters. + */ + u64 current_config; +}; + +struct kvm_pmu { + unsigned nr_arch_gp_counters; + unsigned nr_arch_fixed_counters; + unsigned available_event_types; + u64 fixed_ctr_ctrl; + u64 fixed_ctr_ctrl_mask; + u64 global_ctrl; + u64 global_status; + u64 global_ovf_ctrl; + u64 counter_bitmask[2]; + u64 global_ctrl_mask; + u64 global_ovf_ctrl_mask; + u64 reserved_bits; + u64 raw_event_mask; + 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; + DECLARE_BITMAP(reprogram_pmi, X86_PMC_IDX_MAX); + DECLARE_BITMAP(all_valid_pmc_idx, X86_PMC_IDX_MAX); + DECLARE_BITMAP(pmc_in_use, X86_PMC_IDX_MAX); + + /* + * The gate to release perf_events not marked in + * pmc_in_use only once in a vcpu time slice. + */ + bool need_cleanup; + + /* + * The total number of programmed perf_events and it helps to avoid + * redundant check before cleanup if guest don't use vPMU at all. + */ + u8 event_count; +}; + +struct kvm_pmu_ops; + +enum { + KVM_DEBUGREG_BP_ENABLED = 1, + KVM_DEBUGREG_WONT_EXIT = 2, + KVM_DEBUGREG_RELOAD = 4, +}; + +struct kvm_mtrr_range { + u64 base; + u64 mask; + struct list_head node; +}; + +struct kvm_mtrr { + struct kvm_mtrr_range var_ranges[KVM_NR_VAR_MTRR]; + mtrr_type fixed_ranges[KVM_NR_FIXED_MTRR_REGION]; + u64 deftype; + + struct list_head head; +}; + +/* Hyper-V SynIC timer */ +struct kvm_vcpu_hv_stimer { + struct hrtimer timer; + int index; + union hv_stimer_config config; + u64 count; + u64 exp_time; + struct hv_message msg; + bool msg_pending; +}; + +/* Hyper-V synthetic interrupt controller (SynIC)*/ +struct kvm_vcpu_hv_synic { + u64 version; + u64 control; + u64 msg_page; + u64 evt_page; + atomic64_t sint[HV_SYNIC_SINT_COUNT]; + atomic_t sint_to_gsi[HV_SYNIC_SINT_COUNT]; + DECLARE_BITMAP(auto_eoi_bitmap, 256); + DECLARE_BITMAP(vec_bitmap, 256); + bool active; + bool dont_zero_synic_pages; +}; + +/* Hyper-V per vcpu emulation context */ +struct kvm_vcpu_hv { + u32 vp_index; + u64 hv_vapic; + s64 runtime_offset; + struct kvm_vcpu_hv_synic synic; + struct kvm_hyperv_exit exit; + struct kvm_vcpu_hv_stimer stimer[HV_SYNIC_STIMER_COUNT]; + DECLARE_BITMAP(stimer_pending_bitmap, HV_SYNIC_STIMER_COUNT); + cpumask_t tlb_flush; +}; + +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 cr4_guest_rsvd_bits; + unsigned long cr8; + u32 host_pkru; + u32 pkru; + u32 hflags; + u64 efer; + u64 apic_base; + struct kvm_lapic *apic; /* kernel irqchip context */ + bool apicv_active; + bool load_eoi_exitmap_pending; + DECLARE_BITMAP(ioapic_handled_vectors, 256); + unsigned long apic_attention; + int32_t apic_arb_prio; + int mp_state; + u64 ia32_misc_enable_msr; + u64 smbase; + u64 smi_count; + bool at_instruction_boundary; + bool tpr_access_reporting; + bool xsaves_enabled; + u64 ia32_xss; + u64 microcode_version; + u64 arch_capabilities; + u64 perf_capabilities; + + /* + * 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; + + /* Non-nested MMU for L1 */ + struct kvm_mmu root_mmu; + + /* L1 MMU when running nested */ + struct kvm_mmu guest_mmu; + + /* + * Paging state of an L2 guest (used for nested npt) + * + * This context will save all necessary information to walk page tables + * of 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_shadow_page_cache; + struct kvm_mmu_memory_cache mmu_gfn_array_cache; + struct kvm_mmu_memory_cache mmu_page_header_cache; + + /* + * QEMU userspace and the guest each have their own FPU state. + * In vcpu_run, we switch between the user and guest FPU contexts. + * While running a VCPU, the VCPU thread will have the guest FPU + * context. + * + * Note that while the PKRU state lives inside the fpu registers, + * it is switched out separately at VMENTER and VMEXIT time. The + * "guest_fpu" state here contains the guest FPU context, with the + * host PRKU bits. + */ + struct fpu *user_fpu; + struct fpu *guest_fpu; + + u64 xcr0; + u64 guest_supported_xcr0; + + struct kvm_pio_request pio; + void *pio_data; + + u8 event_exit_inst_len; + + struct kvm_queued_exception { + bool pending; + bool injected; + bool has_error_code; + u8 nr; + u32 error_code; + unsigned long payload; + bool has_payload; + u8 nested_apf; + } exception; + + struct kvm_queued_interrupt { + bool injected; + bool soft; + u8 nr; + } interrupt; + + int halt_request; /* real mode on Intel only */ + + int cpuid_nent; + struct kvm_cpuid_entry2 *cpuid_entries; + + unsigned long cr3_lm_rsvd_bits; + int maxphyaddr; + int max_tdp_level; + + /* 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 { + u8 preempted; + u64 msr_val; + u64 last_steal; + struct gfn_to_hva_cache cache; + } st; + + u64 l1_tsc_offset; + u64 tsc_offset; + 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; + u64 msr_ia32_power_ctl; + u64 tsc_scaling_ratio; + + 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 */ + bool smi_pending; /* SMI queued after currently running handler */ + + struct kvm_mtrr 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 msr_platform_info; + u64 msr_misc_features_enables; + + u64 mcg_cap; + u64 mcg_status; + u64 mcg_ctl; + u64 mcg_ext_ctl; + u64 *mce_banks; + + /* Cache MMIO info */ + u64 mmio_gva; + unsigned mmio_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; + + struct kvm_vcpu_hv hyperv; + + cpumask_var_t wbinvd_dirty_mask; + + unsigned long last_retry_eip; + unsigned long last_retry_addr; + + struct { + bool halted; + gfn_t gfns[ASYNC_PF_PER_VCPU]; + struct gfn_to_hva_cache data; + u64 msr_en_val; /* MSR_KVM_ASYNC_PF_EN */ + u64 msr_int_val; /* MSR_KVM_ASYNC_PF_INT */ + u16 vec; + u32 id; + bool send_user_only; + u32 host_apf_flags; + unsigned long nested_apf_token; + bool delivery_as_pf_vmexit; + bool pageready_pending; + } apf; + + /* OSVW MSRs (AMD only) */ + struct { + u64 length; + u64 status; + } osvw; + + struct { + u64 msr_val; + struct gfn_to_hva_cache data; + } pv_eoi; + + u64 msr_kvm_poll_control; + + /* + * Indicates the guest is trying to write a gfn that contains one or + * more of the PTEs used to translate the write itself, i.e. the access + * is changing its own translation in the guest page tables. KVM exits + * to userspace if emulation of the faulting instruction fails and this + * flag is set, as KVM cannot make forward progress. + * + * If emulation fails for a write to guest page tables, KVM unprotects + * (zaps) the shadow page for the target gfn and resumes the guest to + * retry the non-emulatable instruction (on hardware). Unprotecting the + * gfn doesn't allow forward progress for a self-changing access because + * doing so also zaps the translation for the gfn, i.e. retrying the + * instruction will hit a !PRESENT fault, which results in a new shadow + * page and sends KVM back to square one. + */ + 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; + + int pending_ioapic_eoi; + int pending_external_vector; + + /* be preempted when it's in kernel-mode(cpl=0) */ + bool preempted_in_kernel; + + /* Flush the L1 Data cache for L1TF mitigation on VMENTER */ + bool l1tf_flush_l1d; + + /* Host CPU on which VM-entry was most recently attempted */ + unsigned int last_vmentry_cpu; + + /* AMD MSRC001_0015 Hardware Configuration */ + u64 msr_hwcr; + + /* pv related cpuid info */ + struct { + /* + * value of the eax register in the KVM_CPUID_FEATURES CPUID + * leaf. + */ + u32 features; + + /* + * indicates whether pv emulation should be disabled if features + * are not present in the guest's cpuid + */ + bool enforce; + } pv_cpuid; +}; + +struct kvm_lpage_info { + int disallow_lpage; +}; + +struct kvm_arch_memory_slot { + struct kvm_rmap_head *rmap[KVM_NR_PAGE_SIZES]; + struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1]; + unsigned short *gfn_track[KVM_PAGE_TRACK_MAX]; +}; + +/* + * 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. + */ +#define KVM_APIC_MODE_XAPIC_CLUSTER 4 +#define KVM_APIC_MODE_XAPIC_FLAT 8 +#define KVM_APIC_MODE_X2APIC 16 + +struct kvm_apic_map { + struct rcu_head rcu; + u8 mode; + u32 max_apic_id; + union { + struct kvm_lapic *xapic_flat_map[8]; + struct kvm_lapic *xapic_cluster_map[16][4]; + }; + struct kvm_lapic *phys_map[]; +}; + +/* Hyper-V synthetic debugger (SynDbg)*/ +struct kvm_hv_syndbg { + struct { + u64 control; + u64 status; + u64 send_page; + u64 recv_page; + u64 pending_page; + } control; + u64 options; +}; + +/* Hyper-V emulation context */ +struct kvm_hv { + struct mutex hv_lock; + u64 hv_guest_os_id; + u64 hv_hypercall; + u64 hv_tsc_page; + + /* Hyper-v based guest crash (NT kernel bugcheck) parameters */ + u64 hv_crash_param[HV_X64_MSR_CRASH_PARAMS]; + u64 hv_crash_ctl; + + struct ms_hyperv_tsc_page tsc_ref; + + struct idr conn_to_evt; + + u64 hv_reenlightenment_control; + u64 hv_tsc_emulation_control; + u64 hv_tsc_emulation_status; + + /* How many vCPUs have VP index != vCPU index */ + atomic_t num_mismatched_vp_indexes; + + struct hv_partition_assist_pg *hv_pa_pg; + struct kvm_hv_syndbg hv_syndbg; +}; + +struct msr_bitmap_range { + u32 flags; + u32 nmsrs; + u32 base; + unsigned long *bitmap; +}; + +enum kvm_irqchip_mode { + KVM_IRQCHIP_NONE, + KVM_IRQCHIP_KERNEL, /* created with KVM_CREATE_IRQCHIP */ + KVM_IRQCHIP_SPLIT, /* created with KVM_CAP_SPLIT_IRQCHIP */ +}; + +struct kvm_x86_msr_filter { + u8 count; + bool default_allow:1; + struct msr_bitmap_range ranges[16]; +}; + +#define APICV_INHIBIT_REASON_DISABLE 0 +#define APICV_INHIBIT_REASON_HYPERV 1 +#define APICV_INHIBIT_REASON_NESTED 2 +#define APICV_INHIBIT_REASON_IRQWIN 3 +#define APICV_INHIBIT_REASON_PIT_REINJ 4 +#define APICV_INHIBIT_REASON_X2APIC 5 + +struct kvm_arch { + unsigned long n_used_mmu_pages; + unsigned long n_requested_mmu_pages; + unsigned long n_max_mmu_pages; + unsigned int indirect_shadow_pages; + u8 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 lpage_disallowed_mmu_pages; + struct kvm_page_track_notifier_node mmu_sp_tracker; + struct kvm_page_track_notifier_head track_notifier_head; + + struct list_head assigned_dev_head; + struct iommu_domain *iommu_domain; + bool iommu_noncoherent; +#define __KVM_HAVE_ARCH_NONCOHERENT_DMA + atomic_t noncoherent_dma_count; +#define __KVM_HAVE_ARCH_ASSIGNED_DEVICE + atomic_t assigned_device_count; + struct kvm_pic *vpic; + struct kvm_ioapic *vioapic; + struct kvm_pit *vpit; + atomic_t vapics_in_nmi_mode; + struct mutex apic_map_lock; + struct kvm_apic_map *apic_map; + atomic_t apic_map_dirty; + + bool apic_access_page_done; + unsigned long apicv_inhibit_reasons; + + gpa_t wall_clock; + + bool mwait_in_guest; + bool hlt_in_guest; + bool pause_in_guest; + bool cstate_in_guest; + + 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; + u64 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; + + struct kvm_hv hyperv; + + #ifdef CONFIG_KVM_MMU_AUDIT + int audit_point; + #endif + + bool backwards_tsc_observed; + bool boot_vcpu_runs_old_kvmclock; + u32 bsp_vcpu_id; + + u64 disabled_quirks; + + enum kvm_irqchip_mode irqchip_mode; + u8 nr_reserved_ioapic_pins; + + bool disabled_lapic_found; + + bool x2apic_format; + bool x2apic_broadcast_quirk_disabled; + + bool guest_can_read_msr_platform_info; + bool exception_payload_enabled; + + bool bus_lock_detection_enabled; + + /* Deflect RDMSR and WRMSR to user space when they trigger a #GP */ + u32 user_space_msr_mask; + + struct kvm_x86_msr_filter __rcu *msr_filter; + + struct kvm_pmu_event_filter *pmu_event_filter; + struct task_struct *nx_lpage_recovery_thread; + + /* + * Whether the TDP MMU is enabled for this VM. This contains a + * snapshot of the TDP MMU module parameter from when the VM was + * created and remains unchanged for the life of the VM. If this is + * true, TDP MMU handler functions will run for various MMU + * operations. + */ + bool tdp_mmu_enabled; + + /* List of struct tdp_mmu_pages being used as roots */ + struct list_head tdp_mmu_roots; + /* List of struct tdp_mmu_pages not being used as roots */ + struct list_head tdp_mmu_pages; +}; + +struct kvm_vm_stat { + ulong mmu_shadow_zapped; + ulong mmu_pte_write; + ulong mmu_pde_zapped; + ulong mmu_flooded; + ulong mmu_recycled; + ulong mmu_cache_miss; + ulong mmu_unsync; + ulong remote_tlb_flush; + ulong lpages; + ulong nx_lpage_splits; + ulong max_mmu_page_hash_collisions; +}; + +struct kvm_vcpu_stat { + u64 pf_fixed; + u64 pf_guest; + u64 tlb_flush; + u64 invlpg; + + u64 exits; + u64 io_exits; + u64 mmio_exits; + u64 signal_exits; + u64 irq_window_exits; + u64 nmi_window_exits; + u64 l1d_flush; + u64 halt_exits; + u64 halt_successful_poll; + u64 halt_attempted_poll; + u64 halt_poll_invalid; + u64 halt_wakeup; + u64 request_irq_exits; + u64 irq_exits; + u64 host_state_reload; + u64 fpu_reload; + u64 insn_emulation; + u64 insn_emulation_fail; + u64 hypercalls; + u64 irq_injections; + u64 nmi_injections; + u64 req_event; + u64 halt_poll_success_ns; + u64 halt_poll_fail_ns; + u64 preemption_reported; + u64 preemption_other; +}; + +struct x86_instruction_info; + +struct msr_data { + bool host_initiated; + u32 index; + u64 data; +}; + +struct kvm_lapic_irq { + u32 vector; + u16 delivery_mode; + u16 dest_mode; + bool level; + u16 trig_mode; + u32 shorthand; + u32 dest_id; + bool msi_redir_hint; +}; + +static inline u16 kvm_lapic_irq_dest_mode(bool dest_mode_logical) +{ + return dest_mode_logical ? APIC_DEST_LOGICAL : APIC_DEST_PHYSICAL; +} + +struct kvm_x86_ops { + int (*hardware_enable)(void); + void (*hardware_disable)(void); + void (*hardware_unsetup)(void); + bool (*cpu_has_accelerated_tpr)(void); + bool (*has_emulated_msr)(u32 index); + void (*vcpu_after_set_cpuid)(struct kvm_vcpu *vcpu); + + unsigned int vm_size; + int (*vm_init)(struct kvm *kvm); + void (*vm_destroy)(struct kvm *kvm); + + /* Create, but do not attach this VCPU */ + int (*vcpu_create)(struct kvm_vcpu *vcpu); + void (*vcpu_free)(struct kvm_vcpu *vcpu); + void (*vcpu_reset)(struct kvm_vcpu *vcpu, bool init_event); + + 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_exception_bitmap)(struct kvm_vcpu *vcpu); + int (*get_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr); + 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 (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0); + bool (*is_valid_cr4)(struct kvm_vcpu *vcpu, unsigned long cr0); + void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4); + int (*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); + 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 (*tlb_flush_all)(struct kvm_vcpu *vcpu); + void (*tlb_flush_current)(struct kvm_vcpu *vcpu); + int (*tlb_remote_flush)(struct kvm *kvm); + int (*tlb_remote_flush_with_range)(struct kvm *kvm, + struct kvm_tlb_range *range); + + /* + * Flush any TLB entries associated with the given GVA. + * Does not need to flush GPA->HPA mappings. + * Can potentially get non-canonical addresses through INVLPGs, which + * the implementation may choose to ignore if appropriate. + */ + void (*tlb_flush_gva)(struct kvm_vcpu *vcpu, gva_t addr); + + /* + * Flush any TLB entries created by the guest. Like tlb_flush_gva(), + * does not need to flush GPA->HPA mappings. + */ + void (*tlb_flush_guest)(struct kvm_vcpu *vcpu); + + enum exit_fastpath_completion (*run)(struct kvm_vcpu *vcpu); + int (*handle_exit)(struct kvm_vcpu *vcpu, + enum exit_fastpath_completion exit_fastpath); + int (*skip_emulated_instruction)(struct kvm_vcpu *vcpu); + void (*update_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); + void (*cancel_injection)(struct kvm_vcpu *vcpu); + int (*interrupt_allowed)(struct kvm_vcpu *vcpu, bool for_injection); + int (*nmi_allowed)(struct kvm_vcpu *vcpu, bool for_injection); + 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); + bool (*check_apicv_inhibit_reasons)(ulong bit); + void (*pre_update_apicv_exec_ctrl)(struct kvm *kvm, bool activate); + void (*refresh_apicv_exec_ctrl)(struct kvm_vcpu *vcpu); + void (*hwapic_irr_update)(struct kvm_vcpu *vcpu, int max_irr); + void (*hwapic_isr_update)(struct kvm_vcpu *vcpu, int isr); + bool (*guest_apic_has_interrupt)(struct kvm_vcpu *vcpu); + void (*load_eoi_exitmap)(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap); + void (*set_virtual_apic_mode)(struct kvm_vcpu *vcpu); + void (*set_apic_access_page_addr)(struct kvm_vcpu *vcpu); + int (*deliver_posted_interrupt)(struct kvm_vcpu *vcpu, int vector); + int (*sync_pir_to_irr)(struct kvm_vcpu *vcpu); + int (*set_tss_addr)(struct kvm *kvm, unsigned int addr); + int (*set_identity_map_addr)(struct kvm *kvm, u64 ident_addr); + u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio); + + void (*load_mmu_pgd)(struct kvm_vcpu *vcpu, unsigned long pgd, + int pgd_level); + + bool (*has_wbinvd_exit)(void); + + /* Returns actual tsc_offset set in active VMCS */ + u64 (*write_l1_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset); + + /* + * Retrieve somewhat arbitrary exit information. Intended to be used + * only from within tracepoints to avoid VMREADs when tracing is off. + */ + void (*get_exit_info)(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2, + u32 *exit_int_info, u32 *exit_int_info_err_code); + + int (*check_intercept)(struct kvm_vcpu *vcpu, + struct x86_instruction_info *info, + enum x86_intercept_stage stage, + struct x86_exception *exception); + void (*handle_exit_irqoff)(struct kvm_vcpu *vcpu); + + void (*request_immediate_exit)(struct kvm_vcpu *vcpu); + + 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); + + /* pmu operations of sub-arch */ + const struct kvm_pmu_ops *pmu_ops; + const struct kvm_x86_nested_ops *nested_ops; + + /* + * Architecture specific hooks for vCPU blocking due to + * HLT instruction. + * Returns for .pre_block(): + * - 0 means continue to block the vCPU. + * - 1 means we cannot block the vCPU since some event + * happens during this period, such as, 'ON' bit in + * posted-interrupts descriptor is set. + */ + int (*pre_block)(struct kvm_vcpu *vcpu); + void (*post_block)(struct kvm_vcpu *vcpu); + + void (*vcpu_blocking)(struct kvm_vcpu *vcpu); + void (*vcpu_unblocking)(struct kvm_vcpu *vcpu); + + int (*update_pi_irte)(struct kvm *kvm, unsigned int host_irq, + uint32_t guest_irq, bool set); + void (*apicv_post_state_restore)(struct kvm_vcpu *vcpu); + bool (*dy_apicv_has_pending_interrupt)(struct kvm_vcpu *vcpu); + + int (*set_hv_timer)(struct kvm_vcpu *vcpu, u64 guest_deadline_tsc, + bool *expired); + void (*cancel_hv_timer)(struct kvm_vcpu *vcpu); + + void (*setup_mce)(struct kvm_vcpu *vcpu); + + int (*smi_allowed)(struct kvm_vcpu *vcpu, bool for_injection); + int (*pre_enter_smm)(struct kvm_vcpu *vcpu, char *smstate); + int (*pre_leave_smm)(struct kvm_vcpu *vcpu, const char *smstate); + void (*enable_smi_window)(struct kvm_vcpu *vcpu); + + int (*mem_enc_op)(struct kvm *kvm, void __user *argp); + int (*mem_enc_reg_region)(struct kvm *kvm, struct kvm_enc_region *argp); + int (*mem_enc_unreg_region)(struct kvm *kvm, struct kvm_enc_region *argp); + void (*guest_memory_reclaimed)(struct kvm *kvm); + + int (*get_msr_feature)(struct kvm_msr_entry *entry); + + bool (*can_emulate_instruction)(struct kvm_vcpu *vcpu, void *insn, int insn_len); + + bool (*apic_init_signal_blocked)(struct kvm_vcpu *vcpu); + int (*enable_direct_tlbflush)(struct kvm_vcpu *vcpu); + + void (*migrate_timers)(struct kvm_vcpu *vcpu); + void (*msr_filter_changed)(struct kvm_vcpu *vcpu); +}; + +struct kvm_x86_nested_ops { + void (*leave_nested)(struct kvm_vcpu *vcpu); + int (*check_events)(struct kvm_vcpu *vcpu); + bool (*hv_timer_pending)(struct kvm_vcpu *vcpu); + int (*get_state)(struct kvm_vcpu *vcpu, + struct kvm_nested_state __user *user_kvm_nested_state, + unsigned user_data_size); + int (*set_state)(struct kvm_vcpu *vcpu, + struct kvm_nested_state __user *user_kvm_nested_state, + struct kvm_nested_state *kvm_state); + bool (*get_nested_state_pages)(struct kvm_vcpu *vcpu); + int (*write_log_dirty)(struct kvm_vcpu *vcpu, gpa_t l2_gpa); + + int (*enable_evmcs)(struct kvm_vcpu *vcpu, + uint16_t *vmcs_version); + uint16_t (*get_evmcs_version)(struct kvm_vcpu *vcpu); +}; + +struct kvm_x86_init_ops { + int (*cpu_has_kvm_support)(void); + int (*disabled_by_bios)(void); + int (*check_processor_compatibility)(void); + int (*hardware_setup)(void); + bool (*intel_pt_intr_in_guest)(void); + + struct kvm_x86_ops *runtime_ops; +}; + +struct kvm_arch_async_pf { + u32 token; + gfn_t gfn; + unsigned long cr3; + bool direct_map; +}; + +extern u64 __read_mostly host_efer; +extern bool __read_mostly allow_smaller_maxphyaddr; +extern struct kvm_x86_ops kvm_x86_ops; + +#define __KVM_HAVE_ARCH_VM_ALLOC +static inline struct kvm *kvm_arch_alloc_vm(void) +{ + return __vmalloc(kvm_x86_ops.vm_size, GFP_KERNEL_ACCOUNT | __GFP_ZERO); +} +void kvm_arch_free_vm(struct kvm *kvm); + +#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB +static inline int kvm_arch_flush_remote_tlb(struct kvm *kvm) +{ + if (kvm_x86_ops.tlb_remote_flush && + !kvm_x86_ops.tlb_remote_flush(kvm)) + return 0; + else + return -ENOTSUPP; +} + +void __init kvm_mmu_x86_module_init(void); +int kvm_mmu_vendor_module_init(void); +void kvm_mmu_vendor_module_exit(void); + +void kvm_mmu_destroy(struct kvm_vcpu *vcpu); +int kvm_mmu_create(struct kvm_vcpu *vcpu); +void kvm_mmu_init_vm(struct kvm *kvm); +void kvm_mmu_uninit_vm(struct kvm *kvm); +void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask, + u64 dirty_mask, u64 nx_mask, u64 x_mask, u64 p_mask, + u64 acc_track_mask, u64 me_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, + int start_level); +void kvm_mmu_zap_collapsible_sptes(struct kvm *kvm, + const 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, u64 gen); +unsigned long kvm_mmu_calculate_default_mmu_pages(struct kvm *kvm); +void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned long kvm_nr_mmu_pages); + +int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3); +bool pdptrs_changed(struct kvm_vcpu *vcpu); + +int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, + const void *val, int bytes); + +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; +/* maximum supported tsc_khz for guests */ +extern u32 kvm_max_guest_tsc_khz; +/* number of bits of the fractional part of the TSC scaling ratio */ +extern u8 kvm_tsc_scaling_ratio_frac_bits; +/* maximum allowed value of TSC scaling ratio */ +extern u64 kvm_max_tsc_scaling_ratio; +/* 1ull << kvm_tsc_scaling_ratio_frac_bits */ +extern u64 kvm_default_tsc_scaling_ratio; + +extern u64 kvm_mce_cap_supported; + +/* + * EMULTYPE_NO_DECODE - Set when re-emulating an instruction (after completing + * userspace I/O) to indicate that the emulation context + * should be resued as is, i.e. skip initialization of + * emulation context, instruction fetch and decode. + * + * EMULTYPE_TRAP_UD - Set when emulating an intercepted #UD from hardware. + * Indicates that only select instructions (tagged with + * EmulateOnUD) should be emulated (to minimize the emulator + * attack surface). See also EMULTYPE_TRAP_UD_FORCED. + * + * EMULTYPE_SKIP - Set when emulating solely to skip an instruction, i.e. to + * decode the instruction length. For use *only* by + * kvm_x86_ops.skip_emulated_instruction() implementations. + * + * EMULTYPE_ALLOW_RETRY_PF - Set when the emulator should resume the guest to + * retry native execution under certain conditions, + * Can only be set in conjunction with EMULTYPE_PF. + * + * EMULTYPE_TRAP_UD_FORCED - Set when emulating an intercepted #UD that was + * triggered by KVM's magic "force emulation" prefix, + * which is opt in via module param (off by default). + * Bypasses EmulateOnUD restriction despite emulating + * due to an intercepted #UD (see EMULTYPE_TRAP_UD). + * Used to test the full emulator from userspace. + * + * EMULTYPE_VMWARE_GP - Set when emulating an intercepted #GP for VMware + * backdoor emulation, which is opt in via module param. + * VMware backoor emulation handles select instructions + * and reinjects the #GP for all other cases. + * + * EMULTYPE_PF - Set when emulating MMIO by way of an intercepted #PF, in which + * case the CR2/GPA value pass on the stack is valid. + */ +#define EMULTYPE_NO_DECODE (1 << 0) +#define EMULTYPE_TRAP_UD (1 << 1) +#define EMULTYPE_SKIP (1 << 2) +#define EMULTYPE_ALLOW_RETRY_PF (1 << 3) +#define EMULTYPE_TRAP_UD_FORCED (1 << 4) +#define EMULTYPE_VMWARE_GP (1 << 5) +#define EMULTYPE_PF (1 << 6) + +int kvm_emulate_instruction(struct kvm_vcpu *vcpu, int emulation_type); +int kvm_emulate_instruction_from_buffer(struct kvm_vcpu *vcpu, + void *insn, int insn_len); + +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 index, u64 *data, bool host_initiated); +int kvm_get_msr(struct kvm_vcpu *vcpu, u32 index, u64 *data); +int kvm_set_msr(struct kvm_vcpu *vcpu, u32 index, u64 data); +int kvm_emulate_rdmsr(struct kvm_vcpu *vcpu); +int kvm_emulate_wrmsr(struct kvm_vcpu *vcpu); + +int kvm_fast_pio(struct kvm_vcpu *vcpu, int size, unsigned short port, int in); +int 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, struct msr_data *msr); +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_queue_exception_p(struct kvm_vcpu *vcpu, unsigned nr, unsigned long payload); +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); +bool kvm_inject_emulated_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); + else + __clear_bit(irq_source_id, irq_state); + + return !!(*irq_state); +} + +#define KVM_MMU_ROOT_CURRENT BIT(0) +#define KVM_MMU_ROOT_PREVIOUS(i) BIT(1+i) +#define KVM_MMU_ROOTS_ALL (~0UL) + +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); + +void kvm_update_dr7(struct kvm_vcpu *vcpu); + +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); +void kvm_mmu_free_roots(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, + ulong roots_to_free); +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); + +bool kvm_apicv_activated(struct kvm *kvm); +void kvm_apicv_init(struct kvm *kvm, bool enable); +void kvm_vcpu_update_apicv(struct kvm_vcpu *vcpu); +void kvm_request_apicv_update(struct kvm *kvm, bool activate, + unsigned long bit); + +int kvm_emulate_hypercall(struct kvm_vcpu *vcpu); + +int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u64 error_code, + void *insn, int insn_len); +void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva); +void kvm_mmu_invalidate_gva(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, + gva_t gva, hpa_t root_hpa); +void kvm_mmu_invpcid_gva(struct kvm_vcpu *vcpu, gva_t gva, unsigned long pcid); +void kvm_mmu_new_pgd(struct kvm_vcpu *vcpu, gpa_t new_pgd, bool skip_tlb_flush, + bool skip_mmu_sync); + +void kvm_configure_mmu(bool enable_tdp, int tdp_max_root_level, + int tdp_huge_page_level); + +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; +} +#endif + +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); +} + +#define TSS_IOPB_BASE_OFFSET 0x66 +#define TSS_BASE_SIZE 0x68 +#define TSS_IOPB_SIZE (65536 / 8) +#define TSS_REDIRECTION_SIZE (256 / 8) +#define RMODE_TSS_SIZE \ + (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1) + +enum { + TASK_SWITCH_CALL = 0, + TASK_SWITCH_IRET = 1, + TASK_SWITCH_JMP = 2, + TASK_SWITCH_GATE = 3, +}; + +#define HF_GIF_MASK (1 << 0) +#define HF_NMI_MASK (1 << 3) +#define HF_IRET_MASK (1 << 4) +#define HF_GUEST_MASK (1 << 5) /* VCPU is in guest-mode */ +#define HF_SMM_MASK (1 << 6) +#define HF_SMM_INSIDE_NMI_MASK (1 << 7) + +#define __KVM_VCPU_MULTIPLE_ADDRESS_SPACE +#define KVM_ADDRESS_SPACE_NUM 2 + +#define kvm_arch_vcpu_memslots_id(vcpu) ((vcpu)->arch.hflags & HF_SMM_MASK ? 1 : 0) +#define kvm_memslots_for_spte_role(kvm, role) __kvm_memslots(kvm, (role).smm) + +asmlinkage void kvm_spurious_fault(void); + +/* + * Hardware virtualization extension instructions may fault if a + * reboot turns off virtualization while processes are running. + * Usually after catching the fault we just panic; during reboot + * instead the instruction is ignored. + */ +#define __kvm_handle_fault_on_reboot(insn) \ + "666: \n\t" \ + insn "\n\t" \ + "jmp 668f \n\t" \ + "667: \n\t" \ + "1: \n\t" \ + ".pushsection .discard.instr_begin \n\t" \ + ".long 1b - . \n\t" \ + ".popsection \n\t" \ + "call kvm_spurious_fault \n\t" \ + "1: \n\t" \ + ".pushsection .discard.instr_end \n\t" \ + ".long 1b - . \n\t" \ + ".popsection \n\t" \ + "668: \n\t" \ + _ASM_EXTABLE(666b, 667b) + +#define KVM_ARCH_WANT_MMU_NOTIFIER +int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end, + unsigned flags); +int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end); +int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); +int 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_cpu_has_extint(struct kvm_vcpu *v); +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, bool init_event); +void kvm_vcpu_reload_apic_access_page(struct kvm_vcpu *vcpu); + +int kvm_pv_send_ipi(struct kvm *kvm, unsigned long ipi_bitmap_low, + unsigned long ipi_bitmap_high, u32 min, + unsigned long icr, int op_64_bit); + +void kvm_define_user_return_msr(unsigned index, u32 msr); +int kvm_probe_user_return_msr(u32 msr); +int kvm_set_user_return_msr(unsigned index, u64 val, u64 mask); + +u64 kvm_scale_tsc(struct kvm_vcpu *vcpu, u64 tsc); +u64 kvm_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc); + +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_make_mclock_inprogress_request(struct kvm *kvm); +void kvm_make_scan_ioapic_request(struct kvm *kvm); +void kvm_make_scan_ioapic_request_mask(struct kvm *kvm, + unsigned long *vcpu_bitmap); + +bool 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); +void kvm_arch_async_page_present_queued(struct kvm_vcpu *vcpu); +bool kvm_arch_can_dequeue_async_page_present(struct kvm_vcpu *vcpu); +extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn); + +int kvm_skip_emulated_instruction(struct kvm_vcpu *vcpu); +int kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err); +void __kvm_request_immediate_exit(struct kvm_vcpu *vcpu); + +int kvm_is_in_guest(void); + +int __x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size); +bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu); +bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu); + +bool kvm_intr_is_single_vcpu(struct kvm *kvm, struct kvm_lapic_irq *irq, + struct kvm_vcpu **dest_vcpu); + +void kvm_set_msi_irq(struct kvm *kvm, struct kvm_kernel_irq_routing_entry *e, + struct kvm_lapic_irq *irq); + +static inline bool kvm_irq_is_postable(struct kvm_lapic_irq *irq) +{ + /* We can only post Fixed and LowPrio IRQs */ + return (irq->delivery_mode == APIC_DM_FIXED || + irq->delivery_mode == APIC_DM_LOWEST); +} + +static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) +{ + if (kvm_x86_ops.vcpu_blocking) + kvm_x86_ops.vcpu_blocking(vcpu); +} + +static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) +{ + if (kvm_x86_ops.vcpu_unblocking) + kvm_x86_ops.vcpu_unblocking(vcpu); +} + +static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {} + +static inline int kvm_cpu_get_apicid(int mps_cpu) +{ +#ifdef CONFIG_X86_LOCAL_APIC + return default_cpu_present_to_apicid(mps_cpu); +#else + WARN_ON_ONCE(1); + return BAD_APICID; +#endif +} + +#define put_smstate(type, buf, offset, val) \ + *(type *)((buf) + (offset) - 0x7e00) = val + +#define GET_SMSTATE(type, buf, offset) \ + (*(type *)((buf) + (offset) - 0x7e00)) + +#endif /* _ASM_X86_KVM_HOST_H */ |