/* * 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 #include #include #include #include #include #include #include #include #include #include #define KVM_MAX_VCPUS 64 #define KVM_MEMORY_SLOTS 32 /* memory slots that does not exposed to userspace */ #define KVM_PRIVATE_MEM_SLOTS 4 #define KVM_PIO_PAGE_OFFSET 1 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1) #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD)) #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \ 0xFFFFFF0000000000ULL) #define INVALID_PAGE (~(hpa_t)0) #define UNMAPPED_GVA (~(gpa_t)0) /* KVM Hugepage definitions for x86 */ #define KVM_NR_PAGE_SIZES 3 #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + (((x) - 1) * 9)) #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) #define DE_VECTOR 0 #define DB_VECTOR 1 #define BP_VECTOR 3 #define OF_VECTOR 4 #define BR_VECTOR 5 #define UD_VECTOR 6 #define NM_VECTOR 7 #define DF_VECTOR 8 #define TS_VECTOR 10 #define NP_VECTOR 11 #define SS_VECTOR 12 #define GP_VECTOR 13 #define PF_VECTOR 14 #define MF_VECTOR 16 #define MC_VECTOR 18 #define SELECTOR_TI_MASK (1 << 2) #define SELECTOR_RPL_MASK 0x03 #define IOPL_SHIFT 12 #define KVM_ALIAS_SLOTS 4 #define KVM_PERMILLE_MMU_PAGES 20 #define KVM_MIN_ALLOC_MMU_PAGES 64 #define KVM_MMU_HASH_SHIFT 10 #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 40 #define KVM_NR_FIXED_MTRR_REGION 88 #define KVM_NR_VAR_MTRR 8 extern spinlock_t kvm_lock; extern struct list_head vm_list; struct kvm_vcpu; struct kvm; enum kvm_reg { VCPU_REGS_RAX = 0, VCPU_REGS_RCX = 1, VCPU_REGS_RDX = 2, VCPU_REGS_RBX = 3, VCPU_REGS_RSP = 4, VCPU_REGS_RBP = 5, VCPU_REGS_RSI = 6, VCPU_REGS_RDI = 7, #ifdef CONFIG_X86_64 VCPU_REGS_R8 = 8, VCPU_REGS_R9 = 9, VCPU_REGS_R10 = 10, VCPU_REGS_R11 = 11, VCPU_REGS_R12 = 12, VCPU_REGS_R13 = 13, VCPU_REGS_R14 = 14, VCPU_REGS_R15 = 15, #endif VCPU_REGS_RIP, NR_VCPU_REGS }; enum kvm_reg_ex { VCPU_EXREG_PDPTR = NR_VCPU_REGS, }; 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, }; #include #define KVM_NR_MEM_OBJS 40 #define KVM_NR_DB_REGS 4 #define DR6_BD (1 << 13) #define DR6_BS (1 << 14) #define DR6_FIXED_1 0xffff0ff0 #define DR6_VOLATILE 0x0000e00f #define DR7_BP_EN_MASK 0x000000ff #define DR7_GE (1 << 9) #define DR7_GD (1 << 13) #define DR7_FIXED_1 0x00000400 #define DR7_VOLATILE 0xffff23ff /* * 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]; }; #define NR_PTE_CHAIN_ENTRIES 5 struct kvm_pte_chain { u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES]; struct hlist_node link; }; /* * 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; }; }; 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; /* * One bit set per slot which has memory * in this shadow page. */ DECLARE_BITMAP(slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS); bool multimapped; /* More than one parent_pte? */ bool unsync; int root_count; /* Currently serving as active root */ unsigned int unsync_children; union { u64 *parent_pte; /* !multimapped */ struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */ }; DECLARE_BITMAP(unsync_child_bitmap, 512); }; struct kvm_pv_mmu_op_buffer { void *ptr; unsigned len; unsigned processed; char buf[512] __aligned(sizeof(long)); }; 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 (*new_cr3)(struct kvm_vcpu *vcpu); int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err); void (*free)(struct kvm_vcpu *vcpu); gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access, u32 *error); void (*prefetch_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *page); 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; int root_level; int shadow_root_level; union kvm_mmu_page_role base_role; u64 *pae_root; u64 rsvd_bits_mask[2][4]; }; struct kvm_vcpu_arch { u64 host_tsc; /* * 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 pdptrs[4]; /* pae */ u64 efer; u64 apic_base; struct kvm_lapic *apic; /* kernel irqchip context */ int32_t apic_arb_prio; int mp_state; int sipi_vector; u64 ia32_misc_enable_msr; bool tpr_access_reporting; struct kvm_mmu mmu; /* only needed in kvm_pv_mmu_op() path, but it's hot so * put it here to avoid allocation */ struct kvm_pv_mmu_op_buffer mmu_op_buffer; struct kvm_mmu_memory_cache mmu_pte_chain_cache; struct kvm_mmu_memory_cache mmu_rmap_desc_cache; struct kvm_mmu_memory_cache mmu_page_cache; struct kvm_mmu_memory_cache mmu_page_header_cache; gfn_t last_pt_write_gfn; int last_pt_write_count; u64 *last_pte_updated; gfn_t last_pte_gfn; struct { gfn_t gfn; /* presumed gfn during guest pte update */ pfn_t pfn; /* pfn corresponding to that gfn */ unsigned long mmu_seq; } update_pte; struct fpu guest_fpu; gva_t mmio_fault_cr2; 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]; /* emulate context */ struct x86_emulate_ctxt emulate_ctxt; gpa_t time; struct pvclock_vcpu_time_info hv_clock; unsigned int hv_clock_tsc_khz; unsigned int time_offset; struct page *time_page; bool nmi_pending; bool nmi_injected; struct mtrr_state_type mtrr_state; u32 pat; int switch_db_regs; unsigned long db[KVM_NR_DB_REGS]; unsigned long dr6; unsigned long dr7; unsigned long eff_db[KVM_NR_DB_REGS]; u64 mcg_cap; u64 mcg_status; u64 mcg_ctl; u64 *mce_banks; /* used for guest single stepping over the given code position */ unsigned long singlestep_rip; /* fields used by HYPER-V emulation */ u64 hv_vapic; }; struct kvm_mem_alias { gfn_t base_gfn; unsigned long npages; gfn_t target_gfn; #define KVM_ALIAS_INVALID 1UL unsigned long flags; }; #define KVM_ARCH_HAS_UNALIAS_INSTANTIATION struct kvm_mem_aliases { struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS]; int naliases; }; struct kvm_arch { struct kvm_mem_aliases *aliases; unsigned int n_free_mmu_pages; unsigned int n_requested_mmu_pages; unsigned int n_alloc_mmu_pages; atomic_t invlpg_counter; 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 assigned_dev_head; struct iommu_domain *iommu_domain; int iommu_flags; struct kvm_pic *vpic; struct kvm_ioapic *vioapic; struct kvm_pit *vpit; int vapics_in_nmi_mode; unsigned int tss_addr; struct page *apic_access_page; gpa_t wall_clock; struct page *ept_identity_pagetable; bool ept_identity_pagetable_done; gpa_t ept_identity_map_addr; unsigned long irq_sources_bitmap; u64 vm_init_tsc; s64 kvmclock_offset; struct kvm_xen_hvm_config xen_hvm_config; /* fields used by HYPER-V emulation */ u64 hv_guest_os_id; u64 hv_hypercall; }; 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_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 kvm_x86_ops { int (*cpu_has_kvm_support)(void); /* __init */ int (*disabled_by_bios)(void); /* __init */ int (*hardware_enable)(void *dummy); void (*hardware_disable)(void *dummy); 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); int (*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 (*set_guest_debug)(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg); int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata); int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 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_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); void (*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); 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_activate)(struct kvm_vcpu *vcpu); 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, int mask); 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); 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 (*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); void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry); const struct trace_print_flags *exit_reasons_str; }; extern struct kvm_x86_ops *kvm_x86_ops; 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); int kvm_mmu_setup(struct kvm_vcpu *vcpu); void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte); void kvm_mmu_set_base_ptes(u64 base_pte); void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask, u64 dirty_mask, u64 nx_mask, u64 x_mask); int kvm_mmu_reset_context(struct kvm_vcpu *vcpu); void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot); void kvm_mmu_zap_all(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, unsigned long cr3); int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, const void *val, int bytes); int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes, gpa_t addr, unsigned long *ret); u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn); extern bool tdp_enabled; enum emulation_result { EMULATE_DONE, /* no further processing */ EMULATE_DO_MMIO, /* kvm_run filled with mmio request */ EMULATE_FAIL, /* can't emulate this instruction */ }; #define EMULTYPE_NO_DECODE (1 << 0) #define EMULTYPE_TRAP_UD (1 << 1) #define EMULTYPE_SKIP (1 << 2) int emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2, u16 error_code, int emulation_type); void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address); void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address); void kvm_enable_efer_bits(u64); int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data); int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 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 emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address); int emulate_clts(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); int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason, bool has_error_code, u32 error_code); void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0); void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3); void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); void 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_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata); int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data); unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu); void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); 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, unsigned long cr2, u32 error_code); bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl); int kvm_pic_set_irq(void *opaque, int irq, int level); void kvm_inject_nmi(struct kvm_vcpu *vcpu); int fx_init(struct kvm_vcpu *vcpu); void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu); void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new, int bytes, bool guest_initiated); 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 kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error); gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error); gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error); gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error); int kvm_emulate_hypercall(struct kvm_vcpu *vcpu); int kvm_fix_hypercall(struct kvm_vcpu *vcpu); int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code); void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva); void kvm_enable_tdp(void); void kvm_disable_tdp(void); int complete_pio(struct kvm_vcpu *vcpu); bool kvm_check_iopl(struct kvm_vcpu *vcpu); struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn); 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_fs(void) { u16 seg; asm("mov %%fs, %0" : "=g"(seg)); return seg; } static inline u16 kvm_read_gs(void) { u16 seg; asm("mov %%gs, %0" : "=g"(seg)); return seg; } static inline u16 kvm_read_ldt(void) { u16 ldt; asm("sldt %0" : "=g"(ldt)); return ldt; } static inline void kvm_load_fs(u16 sel) { asm("mov %0, %%fs" : : "rm"(sel)); } static inline void kvm_load_gs(u16 sel) { asm("mov %0, %%gs" : : "rm"(sel)); } 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_HIF_MASK (1 << 1) #define HF_VINTR_MASK (1 << 2) #define HF_NMI_MASK (1 << 3) #define HF_IRET_MASK (1 << 4) /* * 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_handle_fault_on_reboot(void); #define __kvm_handle_fault_on_reboot(insn) \ "666: " insn "\n\t" \ ".pushsection .fixup, \"ax\" \n" \ "667: \n\t" \ __ASM_SIZE(push) " $666b \n\t" \ "jmp kvm_handle_fault_on_reboot \n\t" \ ".popsection \n\t" \ ".pushsection __ex_table, \"a\" \n\t" \ _ASM_PTR " 666b, 667b \n\t" \ ".popsection" #define KVM_ARCH_WANT_MMU_NOTIFIER int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); int kvm_age_hva(struct kvm *kvm, unsigned long hva); void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); int cpuid_maxphyaddr(struct kvm_vcpu *vcpu); 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_define_shared_msr(unsigned index, u32 msr); void kvm_set_shared_msr(unsigned index, u64 val, u64 mask); bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip); #endif /* _ASM_X86_KVM_HOST_H */