Doug / smarc-fsl-linux-kernel | Embedian Git Server

Commit 8b415dcd762607379cf0a69c9dd25940da1d174e

Authored by Geoff Levand 2013-04-06 03:20:30 +0800

Committed by Gleb Natapov 2013-04-08 18:02:09 +0800

Exists in smarc-l5.0.0_1.0.0-ga and in 5 other branches

KVM: Move kvm_rebooting declaration out of x86

The variable kvm_rebooting is a common kvm variable, so move its
declaration from arch/x86/include/asm/kvm_host.h to
include/asm/kvm_host.h.

Fixes this sparse warning when building on arm64:

  virt/kvm/kvm_main.c:warning: symbol 'kvm_rebooting' was not declared. Should it be static?

Signed-off-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Gleb Natapov <gleb@redhat.com>

Showing 2 changed files with 2 additions and 1 deletions Inline Diff

arch/x86/include/asm/kvm_host.h
include/linux/kvm_host.h

arch/x86/include/asm/kvm_host.h

Diff comments View file @ 8b415dc

 /*
  * 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 254
 #define KVM_SOFT_MAX_VCPUS 160
 #define KVM_USER_MEM_SLOTS 125
 /* 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_MMIO_SIZE 16
 #define KVM_PIO_PAGE_OFFSET 1
 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2
 #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 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_PCID_ENABLED_RESERVED_BITS 0xFFFFFF0000000000ULL
 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS |	\
 				  0xFFFFFF0000000000ULL)
 #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_RDWRGSFS \
 			  | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
 #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_NR_PAGE_SIZES	3
 #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)
 #define SELECTOR_TI_MASK (1 << 2)
 #define SELECTOR_RPL_MASK 0x03
 #define IOPL_SHIFT 12
 #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 80
 #define KVM_NR_FIXED_MTRR_REGION 88
 #define KVM_NR_VAR_MTRR 8
 #define ASYNC_PF_PER_VCPU 64
 struct kvm_vcpu;
 struct kvm;
 struct kvm_async_pf;
 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,
 	VCPU_EXREG_CR3,
 	VCPU_EXREG_RFLAGS,
 	VCPU_EXREG_CPL,
 	VCPU_EXREG_SEGMENTS,
 };
 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 <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_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
 /* 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
 /*
  * 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 */
 	DECLARE_BITMAP(unsync_child_bitmap, 512);
 #ifdef CONFIG_X86_32
 	int clear_spte_count;
 #endif
 	int write_flooding_count;
 	bool mmio_cached;
 };
 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);
 	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);
 	void (*free)(struct kvm_vcpu *vcpu);
 	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);
 	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];
 	/*
 	 * Bitmap: bit set = last pte in walk
 	 * index[0:1]: level (zero-based)
 	 * index[2]: pte.ps
 	 */
 	u8 last_pte_bitmap;
 	bool nx;
 	u64 pdptrs[4]; /* pae */
 };
 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;
 };
 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;
 	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;
 };
 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;
 	/*
 	 * 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;
 	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;
 	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_kernel_ns;
 	u64 last_host_tsc;
 	u64 tsc_offset_adjustment;
 	u64 this_tsc_nsec;
 	u64 this_tsc_write;
 	u8  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;
 	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];
 	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;
 	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;
 };
 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];
 };
 struct kvm_apic_map {
 	struct rcu_head rcu;
 	u8 ldr_bits;
 	/* fields bellow are used to decode ldr values in different modes */
 	u32 cid_shift, cid_mask, lid_mask;
 	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;
 	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;
 	struct mutex apic_map_lock;
 	struct kvm_apic_map *apic_map;
 	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;
 	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;
 	u8  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 kvm_xen_hvm_config xen_hvm_config;
 	/* fields used by HYPER-V emulation */
 	u64 hv_guest_os_id;
 	u64 hv_hypercall;
 	#ifdef CONFIG_KVM_MMU_AUDIT
 	int audit_point;
 	#endif
 };
 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 x86_instruction_info;
 struct msr_data {
 	bool host_initiated;
 	u32 index;
 	u64 data;
 };
 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);
 	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);
 	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);
 	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);
 	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);
 };
 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);
 int 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);
 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
 void kvm_mmu_write_protect_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_zap_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);
 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_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)
 #define EMULTYPE_RETRY		    (1 << 3)
 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);
 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_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, unsigned int 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);
 void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault);
 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl);
 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);
 }
 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_flush_tlb(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);
 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_enable_tdp(void);
 void kvm_disable_tdp(void);
 int complete_pio(struct kvm_vcpu *vcpu);
 bool kvm_check_iopl(struct kvm_vcpu *vcpu);
 static inline gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access)
 {
 	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;
 }
 #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)
 #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);
-extern bool kvm_rebooting;
 #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, "")
 #define KVM_ARCH_WANT_MMU_NOTIFIER
 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 hva);
 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 cpuid_maxphyaddr(struct kvm_vcpu *vcpu);
 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_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);
 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_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 */

include/linux/kvm_host.h

Diff comments View file @ 8b415dc

 #ifndef __KVM_HOST_H
 #define __KVM_HOST_H
 #if IS_ENABLED(CONFIG_KVM)
 /*
  * This work is licensed under the terms of the GNU GPL, version 2.  See
  * the COPYING file in the top-level directory.
  */
 #include <linux/types.h>
 #include <linux/hardirq.h>
 #include <linux/list.h>
 #include <linux/mutex.h>
 #include <linux/spinlock.h>
 #include <linux/signal.h>
 #include <linux/sched.h>
 #include <linux/bug.h>
 #include <linux/mm.h>
 #include <linux/mmu_notifier.h>
 #include <linux/preempt.h>
 #include <linux/msi.h>
 #include <linux/slab.h>
 #include <linux/rcupdate.h>
 #include <linux/ratelimit.h>
 #include <linux/err.h>
 #include <linux/irqflags.h>
 #include <asm/signal.h>
 #include <linux/kvm.h>
 #include <linux/kvm_para.h>
 #include <linux/kvm_types.h>
 #include <asm/kvm_host.h>
 #ifndef KVM_MMIO_SIZE
 #define KVM_MMIO_SIZE 8
 #endif
 /*
  * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
  * in kvm, other bits are visible for userspace which are defined in
  * include/linux/kvm_h.
  */
 #define KVM_MEMSLOT_INVALID	(1UL << 16)
 /* Two fragments for cross MMIO pages. */
 #define KVM_MAX_MMIO_FRAGMENTS	2
 /*
  * For the normal pfn, the highest 12 bits should be zero,
  * so we can mask bit 62 ~ bit 52  to indicate the error pfn,
  * mask bit 63 to indicate the noslot pfn.
  */
 #define KVM_PFN_ERR_MASK	(0x7ffULL << 52)
 #define KVM_PFN_ERR_NOSLOT_MASK	(0xfffULL << 52)
 #define KVM_PFN_NOSLOT		(0x1ULL << 63)
 #define KVM_PFN_ERR_FAULT	(KVM_PFN_ERR_MASK)
 #define KVM_PFN_ERR_HWPOISON	(KVM_PFN_ERR_MASK + 1)
 #define KVM_PFN_ERR_RO_FAULT	(KVM_PFN_ERR_MASK + 2)
 /*
  * error pfns indicate that the gfn is in slot but faild to
  * translate it to pfn on host.
  */
 static inline bool is_error_pfn(pfn_t pfn)
 {
 	return !!(pfn & KVM_PFN_ERR_MASK);
 }
 /*
  * error_noslot pfns indicate that the gfn can not be
  * translated to pfn - it is not in slot or failed to
  * translate it to pfn.
  */
 static inline bool is_error_noslot_pfn(pfn_t pfn)
 {
 	return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
 }
 /* noslot pfn indicates that the gfn is not in slot. */
 static inline bool is_noslot_pfn(pfn_t pfn)
 {
 	return pfn == KVM_PFN_NOSLOT;
 }
 #define KVM_HVA_ERR_BAD		(PAGE_OFFSET)
 #define KVM_HVA_ERR_RO_BAD	(PAGE_OFFSET + PAGE_SIZE)
 static inline bool kvm_is_error_hva(unsigned long addr)
 {
 	return addr >= PAGE_OFFSET;
 }
 #define KVM_ERR_PTR_BAD_PAGE	(ERR_PTR(-ENOENT))
 static inline bool is_error_page(struct page *page)
 {
 	return IS_ERR(page);
 }
 /*
  * vcpu->requests bit members
  */
 #define KVM_REQ_TLB_FLUSH          0
 #define KVM_REQ_MIGRATE_TIMER      1
 #define KVM_REQ_REPORT_TPR_ACCESS  2
 #define KVM_REQ_MMU_RELOAD         3
 #define KVM_REQ_TRIPLE_FAULT       4
 #define KVM_REQ_PENDING_TIMER      5
 #define KVM_REQ_UNHALT             6
 #define KVM_REQ_MMU_SYNC           7
 #define KVM_REQ_CLOCK_UPDATE       8
 #define KVM_REQ_KICK               9
 #define KVM_REQ_DEACTIVATE_FPU    10
 #define KVM_REQ_EVENT             11
 #define KVM_REQ_APF_HALT          12
 #define KVM_REQ_STEAL_UPDATE      13
 #define KVM_REQ_NMI               14
 #define KVM_REQ_IMMEDIATE_EXIT    15
 #define KVM_REQ_PMU               16
 #define KVM_REQ_PMI               17
 #define KVM_REQ_WATCHDOG          18
 #define KVM_REQ_MASTERCLOCK_UPDATE 19
 #define KVM_REQ_MCLOCK_INPROGRESS 20
 #define KVM_REQ_EPR_EXIT          21
 #define KVM_REQ_EOIBITMAP         22
 #define KVM_USERSPACE_IRQ_SOURCE_ID		0
 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID	1
 struct kvm;
 struct kvm_vcpu;
 extern struct kmem_cache *kvm_vcpu_cache;
 extern raw_spinlock_t kvm_lock;
 extern struct list_head vm_list;
 struct kvm_io_range {
 	gpa_t addr;
 	int len;
 	struct kvm_io_device *dev;
 };
 #define NR_IOBUS_DEVS 1000
 struct kvm_io_bus {
 	int                   dev_count;
 	struct kvm_io_range range[];
 };
 enum kvm_bus {
 	KVM_MMIO_BUS,
 	KVM_PIO_BUS,
 	KVM_VIRTIO_CCW_NOTIFY_BUS,
 	KVM_NR_BUSES
 };
 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
 		     int len, const void *val);
 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
 		    void *val);
 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
 			    int len, struct kvm_io_device *dev);
 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
 			      struct kvm_io_device *dev);
 #ifdef CONFIG_KVM_ASYNC_PF
 struct kvm_async_pf {
 	struct work_struct work;
 	struct list_head link;
 	struct list_head queue;
 	struct kvm_vcpu *vcpu;
 	struct mm_struct *mm;
 	gva_t gva;
 	unsigned long addr;
 	struct kvm_arch_async_pf arch;
 	struct page *page;
 	bool done;
 };
 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
 		       struct kvm_arch_async_pf *arch);
 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
 #endif
 enum {
 	OUTSIDE_GUEST_MODE,
 	IN_GUEST_MODE,
 	EXITING_GUEST_MODE,
 	READING_SHADOW_PAGE_TABLES,
 };
 /*
  * Sometimes a large or cross-page mmio needs to be broken up into separate
  * exits for userspace servicing.
  */
 struct kvm_mmio_fragment {
 	gpa_t gpa;
 	void *data;
 	unsigned len;
 };
 struct kvm_vcpu {
 	struct kvm *kvm;
 #ifdef CONFIG_PREEMPT_NOTIFIERS
 	struct preempt_notifier preempt_notifier;
 #endif
 	int cpu;
 	int vcpu_id;
 	int srcu_idx;
 	int mode;
 	unsigned long requests;
 	unsigned long guest_debug;
 	struct mutex mutex;
 	struct kvm_run *run;
 	int fpu_active;
 	int guest_fpu_loaded, guest_xcr0_loaded;
 	wait_queue_head_t wq;
 	struct pid *pid;
 	int sigset_active;
 	sigset_t sigset;
 	struct kvm_vcpu_stat stat;
 #ifdef CONFIG_HAS_IOMEM
 	int mmio_needed;
 	int mmio_read_completed;
 	int mmio_is_write;
 	int mmio_cur_fragment;
 	int mmio_nr_fragments;
 	struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
 #endif
 #ifdef CONFIG_KVM_ASYNC_PF
 	struct {
 		u32 queued;
 		struct list_head queue;
 		struct list_head done;
 		spinlock_t lock;
 	} async_pf;
 #endif
 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
 	/*
 	 * Cpu relax intercept or pause loop exit optimization
 	 * in_spin_loop: set when a vcpu does a pause loop exit
 	 *  or cpu relax intercepted.
 	 * dy_eligible: indicates whether vcpu is eligible for directed yield.
 	 */
 	struct {
 		bool in_spin_loop;
 		bool dy_eligible;
 	} spin_loop;
 #endif
 	bool preempted;
 	struct kvm_vcpu_arch arch;
 };
 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
 {
 	return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
 }
 /*
  * Some of the bitops functions do not support too long bitmaps.
  * This number must be determined not to exceed such limits.
  */
 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
 struct kvm_memory_slot {
 	gfn_t base_gfn;
 	unsigned long npages;
 	unsigned long *dirty_bitmap;
 	struct kvm_arch_memory_slot arch;
 	unsigned long userspace_addr;
 	u32 flags;
 	short id;
 };
 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
 {
 	return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
 }
 struct kvm_kernel_irq_routing_entry {
 	u32 gsi;
 	u32 type;
 	int (*set)(struct kvm_kernel_irq_routing_entry *e,
 		   struct kvm *kvm, int irq_source_id, int level);
 	union {
 		struct {
 			unsigned irqchip;
 			unsigned pin;
 		} irqchip;
 		struct msi_msg msi;
 	};
 	struct hlist_node link;
 };
 #ifdef __KVM_HAVE_IOAPIC
 struct kvm_irq_routing_table {
 	int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
 	struct kvm_kernel_irq_routing_entry *rt_entries;
 	u32 nr_rt_entries;
 	/*
 	 * Array indexed by gsi. Each entry contains list of irq chips
 	 * the gsi is connected to.
 	 */
 	struct hlist_head map[0];
 };
 #else
 struct kvm_irq_routing_table {};
 #endif
 #ifndef KVM_PRIVATE_MEM_SLOTS
 #define KVM_PRIVATE_MEM_SLOTS 0
 #endif
 #ifndef KVM_MEM_SLOTS_NUM
 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
 #endif
 /*
  * Note:
  * memslots are not sorted by id anymore, please use id_to_memslot()
  * to get the memslot by its id.
  */
 struct kvm_memslots {
 	u64 generation;
 	struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
 	/* The mapping table from slot id to the index in memslots[]. */
 	short id_to_index[KVM_MEM_SLOTS_NUM];
 };
 struct kvm {
 	spinlock_t mmu_lock;
 	struct mutex slots_lock;
 	struct mm_struct *mm; /* userspace tied to this vm */
 	struct kvm_memslots *memslots;
 	struct srcu_struct srcu;
 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 	u32 bsp_vcpu_id;
 #endif
 	struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 	atomic_t online_vcpus;
 	int last_boosted_vcpu;
 	struct list_head vm_list;
 	struct mutex lock;
 	struct kvm_io_bus *buses[KVM_NR_BUSES];
 #ifdef CONFIG_HAVE_KVM_EVENTFD
 	struct {
 		spinlock_t        lock;
 		struct list_head  items;
 		struct list_head  resampler_list;
 		struct mutex      resampler_lock;
 	} irqfds;
 	struct list_head ioeventfds;
 #endif
 	struct kvm_vm_stat stat;
 	struct kvm_arch arch;
 	atomic_t users_count;
 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 	struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 	spinlock_t ring_lock;
 	struct list_head coalesced_zones;
 #endif
 	struct mutex irq_lock;
 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 	/*
 	 * Update side is protected by irq_lock and,
 	 * if configured, irqfds.lock.
 	 */
 	struct kvm_irq_routing_table __rcu *irq_routing;
 	struct hlist_head mask_notifier_list;
 	struct hlist_head irq_ack_notifier_list;
 #endif
 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 	struct mmu_notifier mmu_notifier;
 	unsigned long mmu_notifier_seq;
 	long mmu_notifier_count;
 #endif
 	long tlbs_dirty;
 };
 #define kvm_err(fmt, ...) \
 	pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
 #define kvm_info(fmt, ...) \
 	pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
 #define kvm_debug(fmt, ...) \
 	pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
 #define kvm_pr_unimpl(fmt, ...) \
 	pr_err_ratelimited("kvm [%i]: " fmt, \
 			   task_tgid_nr(current), ## __VA_ARGS__)
 /* The guest did something we don't support. */
 #define vcpu_unimpl(vcpu, fmt, ...)					\
 	kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 {
 	smp_rmb();
 	return kvm->vcpus[i];
 }
 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
 	for (idx = 0; \
 	     idx < atomic_read(&kvm->online_vcpus) && \
 	     (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
 	     idx++)
 #define kvm_for_each_memslot(memslot, slots)	\
 	for (memslot = &slots->memslots[0];	\
 	      memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
 		memslot++)
 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
 void vcpu_put(struct kvm_vcpu *vcpu);
 #ifdef __KVM_HAVE_IOAPIC
 int kvm_irqfd_init(void);
 void kvm_irqfd_exit(void);
 #else
 static inline int kvm_irqfd_init(void)
 {
 	return 0;
 }
 static inline void kvm_irqfd_exit(void)
 {
 }
 #endif
 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
 		  struct module *module);
 void kvm_exit(void);
 void kvm_get_kvm(struct kvm *kvm);
 void kvm_put_kvm(struct kvm *kvm);
 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new,
 		     u64 last_generation);
 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
 {
 	return rcu_dereference_check(kvm->memslots,
 			srcu_read_lock_held(&kvm->srcu)
 			|| lockdep_is_held(&kvm->slots_lock));
 }
 static inline struct kvm_memory_slot *
 id_to_memslot(struct kvm_memslots *slots, int id)
 {
 	int index = slots->id_to_index[id];
 	struct kvm_memory_slot *slot;
 	slot = &slots->memslots[index];
 	WARN_ON(slot->id != id);
 	return slot;
 }
 /*
  * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
  * - create a new memory slot
  * - delete an existing memory slot
  * - modify an existing memory slot
  *   -- move it in the guest physical memory space
  *   -- just change its flags
  *
  * Since flags can be changed by some of these operations, the following
  * differentiation is the best we can do for __kvm_set_memory_region():
  */
 enum kvm_mr_change {
 	KVM_MR_CREATE,
 	KVM_MR_DELETE,
 	KVM_MR_MOVE,
 	KVM_MR_FLAGS_ONLY,
 };
 int kvm_set_memory_region(struct kvm *kvm,
 			  struct kvm_userspace_memory_region *mem);
 int __kvm_set_memory_region(struct kvm *kvm,
 			    struct kvm_userspace_memory_region *mem);
 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
 			   struct kvm_memory_slot *dont);
 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 				struct kvm_memory_slot *memslot,
 				struct kvm_userspace_memory_region *mem,
 				enum kvm_mr_change change);
 void kvm_arch_commit_memory_region(struct kvm *kvm,
 				struct kvm_userspace_memory_region *mem,
 				const struct kvm_memory_slot *old,
 				enum kvm_mr_change change);
 bool kvm_largepages_enabled(void);
 void kvm_disable_largepages(void);
 /* flush all memory translations */
 void kvm_arch_flush_shadow_all(struct kvm *kvm);
 /* flush memory translations pointing to 'slot' */
 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 				   struct kvm_memory_slot *slot);
 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
 			    int nr_pages);
 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
 void kvm_release_page_clean(struct page *page);
 void kvm_release_page_dirty(struct page *page);
 void kvm_set_page_dirty(struct page *page);
 void kvm_set_page_accessed(struct page *page);
 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
 		       bool write_fault, bool *writable);
 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
 		      bool *writable);
 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
 void kvm_release_pfn_dirty(pfn_t pfn);
 void kvm_release_pfn_clean(pfn_t pfn);
 void kvm_set_pfn_dirty(pfn_t pfn);
 void kvm_set_pfn_accessed(pfn_t pfn);
 void kvm_get_pfn(pfn_t pfn);
 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 			int len);
 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 			  unsigned long len);
 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 			   void *data, unsigned long len);
 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 			 int offset, int len);
 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 		    unsigned long len);
 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 			   void *data, unsigned long len);
 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 			      gpa_t gpa);
 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
 			     gfn_t gfn);
 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
 void kvm_resched(struct kvm_vcpu *vcpu);
 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 void kvm_flush_remote_tlbs(struct kvm *kvm);
 void kvm_reload_remote_mmus(struct kvm *kvm);
 void kvm_make_mclock_inprogress_request(struct kvm *kvm);
 void kvm_make_update_eoibitmap_request(struct kvm *kvm);
 long kvm_arch_dev_ioctl(struct file *filp,
 			unsigned int ioctl, unsigned long arg);
 long kvm_arch_vcpu_ioctl(struct file *filp,
 			 unsigned int ioctl, unsigned long arg);
 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
 int kvm_dev_ioctl_check_extension(long ext);
 int kvm_get_dirty_log(struct kvm *kvm,
 			struct kvm_dirty_log *log, int *is_dirty);
 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 				struct kvm_dirty_log *log);
 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 				   struct kvm_userspace_memory_region *mem);
 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level);
 long kvm_arch_vm_ioctl(struct file *filp,
 		       unsigned int ioctl, unsigned long arg);
 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 				    struct kvm_translation *tr);
 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 				  struct kvm_sregs *sregs);
 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 				  struct kvm_sregs *sregs);
 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 				    struct kvm_mp_state *mp_state);
 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 				    struct kvm_mp_state *mp_state);
 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 					struct kvm_guest_debug *dbg);
 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 int kvm_arch_init(void *opaque);
 void kvm_arch_exit(void);
 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 int kvm_arch_hardware_enable(void *garbage);
 void kvm_arch_hardware_disable(void *garbage);
 int kvm_arch_hardware_setup(void);
 void kvm_arch_hardware_unsetup(void);
 void kvm_arch_check_processor_compat(void *rtn);
 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
 void kvm_free_physmem(struct kvm *kvm);
 void *kvm_kvzalloc(unsigned long size);
 void kvm_kvfree(const void *addr);
 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
 static inline struct kvm *kvm_arch_alloc_vm(void)
 {
 	return kzalloc(sizeof(struct kvm), GFP_KERNEL);
 }
 static inline void kvm_arch_free_vm(struct kvm *kvm)
 {
 	kfree(kvm);
 }
 #endif
 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
 {
 #ifdef __KVM_HAVE_ARCH_WQP
 	return vcpu->arch.wqp;
 #else
 	return &vcpu->wq;
 #endif
 }
 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
 void kvm_arch_destroy_vm(struct kvm *kvm);
 void kvm_free_all_assigned_devices(struct kvm *kvm);
 void kvm_arch_sync_events(struct kvm *kvm);
 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 bool kvm_is_mmio_pfn(pfn_t pfn);
 struct kvm_irq_ack_notifier {
 	struct hlist_node link;
 	unsigned gsi;
 	void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 };
 struct kvm_assigned_dev_kernel {
 	struct kvm_irq_ack_notifier ack_notifier;
 	struct list_head list;
 	int assigned_dev_id;
 	int host_segnr;
 	int host_busnr;
 	int host_devfn;
 	unsigned int entries_nr;
 	int host_irq;
 	bool host_irq_disabled;
 	bool pci_2_3;
 	struct msix_entry *host_msix_entries;
 	int guest_irq;
 	struct msix_entry *guest_msix_entries;
 	unsigned long irq_requested_type;
 	int irq_source_id;
 	int flags;
 	struct pci_dev *dev;
 	struct kvm *kvm;
 	spinlock_t intx_lock;
 	spinlock_t intx_mask_lock;
 	char irq_name[32];
 	struct pci_saved_state *pci_saved_state;
 };
 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);
 #ifdef __KVM_HAVE_IOAPIC
 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
 				   union kvm_ioapic_redirect_entry *entry,
 				   unsigned long *deliver_bitmask);
 #endif
 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);
 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
 		int irq_source_id, int level);
 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 				   struct kvm_irq_ack_notifier *kian);
 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 				   struct kvm_irq_ack_notifier *kian);
 int kvm_request_irq_source_id(struct kvm *kvm);
 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 /* For vcpu->arch.iommu_flags */
 #define KVM_IOMMU_CACHE_COHERENCY	0x1
 #ifdef CONFIG_IOMMU_API
 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 int kvm_iommu_map_guest(struct kvm *kvm);
 int kvm_iommu_unmap_guest(struct kvm *kvm);
 int kvm_assign_device(struct kvm *kvm,
 		      struct kvm_assigned_dev_kernel *assigned_dev);
 int kvm_deassign_device(struct kvm *kvm,
 			struct kvm_assigned_dev_kernel *assigned_dev);
 #else /* CONFIG_IOMMU_API */
 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 				      struct kvm_memory_slot *slot)
 {
 	return 0;
 }
 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
 					 struct kvm_memory_slot *slot)
 {
 }
 static inline int kvm_iommu_map_guest(struct kvm *kvm)
 {
 	return -ENODEV;
 }
 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 {
 	return 0;
 }
 static inline int kvm_assign_device(struct kvm *kvm,
 		struct kvm_assigned_dev_kernel *assigned_dev)
 {
 	return 0;
 }
 static inline int kvm_deassign_device(struct kvm *kvm,
 		struct kvm_assigned_dev_kernel *assigned_dev)
 {
 	return 0;
 }
 #endif /* CONFIG_IOMMU_API */
 static inline void __guest_enter(void)
 {
 	/*
 	 * This is running in ioctl context so we can avoid
 	 * the call to vtime_account() with its unnecessary idle check.
 	 */
 	vtime_account_system(current);
 	current->flags |= PF_VCPU;
 }
 static inline void __guest_exit(void)
 {
 	/*
 	 * This is running in ioctl context so we can avoid
 	 * the call to vtime_account() with its unnecessary idle check.
 	 */
 	vtime_account_system(current);
 	current->flags &= ~PF_VCPU;
 }
 #ifdef CONFIG_CONTEXT_TRACKING
 extern void guest_enter(void);
 extern void guest_exit(void);
 #else /* !CONFIG_CONTEXT_TRACKING */
 static inline void guest_enter(void)
 {
 	__guest_enter();
 }
 static inline void guest_exit(void)
 {
 	__guest_exit();
 }
 #endif /* !CONFIG_CONTEXT_TRACKING */
 static inline void kvm_guest_enter(void)
 {
 	unsigned long flags;
 	BUG_ON(preemptible());
 	local_irq_save(flags);
 	guest_enter();
 	local_irq_restore(flags);
 	/* KVM does not hold any references to rcu protected data when it
 	 * switches CPU into a guest mode. In fact switching to a guest mode
 	 * is very similar to exiting to userspase from rcu point of view. In
 	 * addition CPU may stay in a guest mode for quite a long time (up to
 	 * one time slice). Lets treat guest mode as quiescent state, just like
 	 * we do with user-mode execution.
 	 */
 	rcu_virt_note_context_switch(smp_processor_id());
 }
 static inline void kvm_guest_exit(void)
 {
 	unsigned long flags;
 	local_irq_save(flags);
 	guest_exit();
 	local_irq_restore(flags);
 }
 /*
  * search_memslots() and __gfn_to_memslot() are here because they are
  * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
  * gfn_to_memslot() itself isn't here as an inline because that would
  * bloat other code too much.
  */
 static inline struct kvm_memory_slot *
 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
 {
 	struct kvm_memory_slot *memslot;
 	kvm_for_each_memslot(memslot, slots)
 		if (gfn >= memslot->base_gfn &&
 		      gfn < memslot->base_gfn + memslot->npages)
 			return memslot;
 	return NULL;
 }
 static inline struct kvm_memory_slot *
 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
 {
 	return search_memslots(slots, gfn);
 }
 static inline unsigned long
 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
 {
 	return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
 }
 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
 {
 	return gfn_to_memslot(kvm, gfn)->id;
 }
 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
 {
 	/* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
 	return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
 		(base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
 }
 static inline gfn_t
 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
 {
 	gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
 	return slot->base_gfn + gfn_offset;
 }
 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 {
 	return (gpa_t)gfn << PAGE_SHIFT;
 }
 static inline gfn_t gpa_to_gfn(gpa_t gpa)
 {
 	return (gfn_t)(gpa >> PAGE_SHIFT);
 }
 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 {
 	return (hpa_t)pfn << PAGE_SHIFT;
 }
 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 {
 	set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 }
 enum kvm_stat_kind {
 	KVM_STAT_VM,
 	KVM_STAT_VCPU,
 };
 struct kvm_stats_debugfs_item {
 	const char *name;
 	int offset;
 	enum kvm_stat_kind kind;
 	struct dentry *dentry;
 };
 extern struct kvm_stats_debugfs_item debugfs_entries[];
 extern struct dentry *kvm_debugfs_dir;
 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
 {
 	if (unlikely(kvm->mmu_notifier_count))
 		return 1;
 	/*
 	 * Ensure the read of mmu_notifier_count happens before the read
 	 * of mmu_notifier_seq.  This interacts with the smp_wmb() in
 	 * mmu_notifier_invalidate_range_end to make sure that the caller
 	 * either sees the old (non-zero) value of mmu_notifier_count or
 	 * the new (incremented) value of mmu_notifier_seq.
 	 * PowerPC Book3s HV KVM calls this under a per-page lock
 	 * rather than under kvm->mmu_lock, for scalability, so
 	 * can't rely on kvm->mmu_lock to keep things ordered.
 	 */
 	smp_rmb();
 	if (kvm->mmu_notifier_seq != mmu_seq)
 		return 1;
 	return 0;
 }
 #endif
 #ifdef KVM_CAP_IRQ_ROUTING
 #define KVM_MAX_IRQ_ROUTES 1024
 int kvm_setup_default_irq_routing(struct kvm *kvm);
 int kvm_set_irq_routing(struct kvm *kvm,
 			const struct kvm_irq_routing_entry *entries,
 			unsigned nr,
 			unsigned flags);
 void kvm_free_irq_routing(struct kvm *kvm);
 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
 #else
 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 #endif
 #ifdef CONFIG_HAVE_KVM_EVENTFD
 void kvm_eventfd_init(struct kvm *kvm);
 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
 void kvm_irqfd_release(struct kvm *kvm);
 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
 #else
 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
 {
 	return -EINVAL;
 }
 static inline void kvm_irqfd_release(struct kvm *kvm) {}
 #endif
 #else
 static inline void kvm_eventfd_init(struct kvm *kvm) {}
 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
 {
 	return -EINVAL;
 }
 static inline void kvm_irqfd_release(struct kvm *kvm) {}
 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 static inline void kvm_irq_routing_update(struct kvm *kvm,
 					  struct kvm_irq_routing_table *irq_rt)
 {
 	rcu_assign_pointer(kvm->irq_routing, irq_rt);
 }
 #endif
 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
 {
 	return -ENOSYS;
 }
 #endif /* CONFIG_HAVE_KVM_EVENTFD */
 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
 {
 	return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
 }
 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
 #else
 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
 #endif
 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 				  unsigned long arg);
 #else
 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 						unsigned long arg)
 {
 	return -ENOTTY;
 }
 #endif
 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
 {
 	set_bit(req, &vcpu->requests);
 }
 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
 {
 	if (test_bit(req, &vcpu->requests)) {
 		clear_bit(req, &vcpu->requests);
 		return true;
 	} else {
 		return false;
 	}
 }
+extern bool kvm_rebooting;
 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
 {
 	vcpu->spin_loop.in_spin_loop = val;
 }
 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
 {
 	vcpu->spin_loop.dy_eligible = val;
 }
 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
 {
 }
 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
 {
 }
 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu)
 {
 	return true;
 }
 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
 #else
 static inline void __guest_enter(void) { return; }
 static inline void __guest_exit(void) { return; }
 #endif /* IS_ENABLED(CONFIG_KVM) */
 #endif