v4.19.13 snapshot.
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
new file mode 100644
index 0000000..c926698
--- /dev/null
+++ b/include/linux/kvm_host.h
@@ -0,0 +1,1302 @@
+#ifndef __KVM_HOST_H
+#define __KVM_HOST_H
+
+/*
+ * 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/vmalloc.h>
+#include <linux/rcupdate.h>
+#include <linux/ratelimit.h>
+#include <linux/err.h>
+#include <linux/irqflags.h>
+#include <linux/context_tracking.h>
+#include <linux/irqbypass.h>
+#include <linux/swait.h>
+#include <linux/refcount.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_MAX_VCPU_ID
+#define KVM_MAX_VCPU_ID KVM_MAX_VCPUS
+#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
+
+#ifndef KVM_ADDRESS_SPACE_NUM
+#define KVM_ADDRESS_SPACE_NUM 1
+#endif
+
+/*
+ * 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(kvm_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(kvm_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(kvm_pfn_t pfn)
+{
+ return pfn == KVM_PFN_NOSLOT;
+}
+
+/*
+ * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390)
+ * provide own defines and kvm_is_error_hva
+ */
+#ifndef KVM_HVA_ERR_BAD
+
+#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;
+}
+
+#endif
+
+#define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
+
+static inline bool is_error_page(struct page *page)
+{
+ return IS_ERR(page);
+}
+
+#define KVM_REQUEST_MASK GENMASK(7,0)
+#define KVM_REQUEST_NO_WAKEUP BIT(8)
+#define KVM_REQUEST_WAIT BIT(9)
+/*
+ * Architecture-independent vcpu->requests bit members
+ * Bits 4-7 are reserved for more arch-independent bits.
+ */
+#define KVM_REQ_TLB_FLUSH (0 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
+#define KVM_REQ_MMU_RELOAD (1 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
+#define KVM_REQ_PENDING_TIMER 2
+#define KVM_REQ_UNHALT 3
+#define KVM_REQUEST_ARCH_BASE 8
+
+#define KVM_ARCH_REQ_FLAGS(nr, flags) ({ \
+ BUILD_BUG_ON((unsigned)(nr) >= (FIELD_SIZEOF(struct kvm_vcpu, requests) * 8) - KVM_REQUEST_ARCH_BASE); \
+ (unsigned)(((nr) + KVM_REQUEST_ARCH_BASE) | (flags)); \
+})
+#define KVM_ARCH_REQ(nr) KVM_ARCH_REQ_FLAGS(nr, 0)
+
+#define KVM_USERSPACE_IRQ_SOURCE_ID 0
+#define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
+
+extern struct kmem_cache *kvm_vcpu_cache;
+
+extern 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;
+ int ioeventfd_count;
+ struct kvm_io_range range[];
+};
+
+enum kvm_bus {
+ KVM_MMIO_BUS,
+ KVM_PIO_BUS,
+ KVM_VIRTIO_CCW_NOTIFY_BUS,
+ KVM_FAST_MMIO_BUS,
+ KVM_NR_BUSES
+};
+
+int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
+ int len, const void *val);
+int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx,
+ gpa_t addr, int len, const void *val, long cookie);
+int kvm_io_bus_read(struct kvm_vcpu *vcpu, 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);
+void kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
+ struct kvm_io_device *dev);
+struct kvm_io_device *kvm_io_bus_get_dev(struct kvm *kvm, enum kvm_bus bus_idx,
+ gpa_t addr);
+
+#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;
+ bool wakeup_all;
+};
+
+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, unsigned long hva,
+ 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;
+ u64 requests;
+ unsigned long guest_debug;
+
+ int pre_pcpu;
+ struct list_head blocked_vcpu_list;
+
+ struct mutex mutex;
+ struct kvm_run *run;
+
+ int guest_xcr0_loaded;
+ struct swait_queue_head wq;
+ struct pid __rcu *pid;
+ int sigset_active;
+ sigset_t sigset;
+ struct kvm_vcpu_stat stat;
+ unsigned int halt_poll_ns;
+ bool valid_wakeup;
+
+#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;
+ struct dentry *debugfs_dentry;
+};
+
+static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
+{
+ /*
+ * The memory barrier ensures a previous write to vcpu->requests cannot
+ * be reordered with the read of vcpu->mode. It pairs with the general
+ * memory barrier following the write of vcpu->mode in VCPU RUN.
+ */
+ smp_mb__before_atomic();
+ 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;
+}
+
+static inline unsigned long *kvm_second_dirty_bitmap(struct kvm_memory_slot *memslot)
+{
+ unsigned long len = kvm_dirty_bitmap_bytes(memslot);
+
+ return memslot->dirty_bitmap + len / sizeof(*memslot->dirty_bitmap);
+}
+
+struct kvm_s390_adapter_int {
+ u64 ind_addr;
+ u64 summary_addr;
+ u64 ind_offset;
+ u32 summary_offset;
+ u32 adapter_id;
+};
+
+struct kvm_hv_sint {
+ u32 vcpu;
+ u32 sint;
+};
+
+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,
+ bool line_status);
+ union {
+ struct {
+ unsigned irqchip;
+ unsigned pin;
+ } irqchip;
+ struct {
+ u32 address_lo;
+ u32 address_hi;
+ u32 data;
+ u32 flags;
+ u32 devid;
+ } msi;
+ struct kvm_s390_adapter_int adapter;
+ struct kvm_hv_sint hv_sint;
+ };
+ struct hlist_node link;
+};
+
+#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
+struct kvm_irq_routing_table {
+ int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS];
+ 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];
+};
+#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
+
+#ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
+static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
+{
+ return 0;
+}
+#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];
+ atomic_t lru_slot;
+ int used_slots;
+};
+
+struct kvm {
+ spinlock_t mmu_lock;
+ struct mutex slots_lock;
+ struct mm_struct *mm; /* userspace tied to this vm */
+ struct kvm_memslots __rcu *memslots[KVM_ADDRESS_SPACE_NUM];
+ struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
+
+ /*
+ * created_vcpus is protected by kvm->lock, and is incremented
+ * at the beginning of KVM_CREATE_VCPU. online_vcpus is only
+ * incremented after storing the kvm_vcpu pointer in vcpus,
+ * and is accessed atomically.
+ */
+ atomic_t online_vcpus;
+ int created_vcpus;
+ int last_boosted_vcpu;
+ struct list_head vm_list;
+ struct mutex lock;
+ struct kvm_io_bus __rcu *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;
+ refcount_t users_count;
+#ifdef CONFIG_KVM_MMIO
+ 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.
+ */
+ struct kvm_irq_routing_table __rcu *irq_routing;
+#endif
+#ifdef CONFIG_HAVE_KVM_IRQFD
+ 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;
+ struct list_head devices;
+ struct dentry *debugfs_dentry;
+ struct kvm_stat_data **debugfs_stat_data;
+ struct srcu_struct srcu;
+ struct srcu_struct irq_srcu;
+ pid_t userspace_pid;
+};
+
+#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_debug_ratelimited(fmt, ...) \
+ pr_debug_ratelimited("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, guest rIP: 0x%lx " fmt, \
+ (vcpu)->vcpu_id, kvm_rip_read(vcpu), ## __VA_ARGS__)
+
+#define vcpu_debug(vcpu, fmt, ...) \
+ kvm_debug("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
+#define vcpu_debug_ratelimited(vcpu, fmt, ...) \
+ kvm_debug_ratelimited("vcpu%i " fmt, (vcpu)->vcpu_id, \
+ ## __VA_ARGS__)
+#define vcpu_err(vcpu, fmt, ...) \
+ kvm_err("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
+
+static inline struct kvm_io_bus *kvm_get_bus(struct kvm *kvm, enum kvm_bus idx)
+{
+ return srcu_dereference_check(kvm->buses[idx], &kvm->srcu,
+ lockdep_is_held(&kvm->slots_lock) ||
+ !refcount_read(&kvm->users_count));
+}
+
+static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
+{
+ /* Pairs with smp_wmb() in kvm_vm_ioctl_create_vcpu, in case
+ * the caller has read kvm->online_vcpus before (as is the case
+ * for kvm_for_each_vcpu, for example).
+ */
+ 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++)
+
+static inline struct kvm_vcpu *kvm_get_vcpu_by_id(struct kvm *kvm, int id)
+{
+ struct kvm_vcpu *vcpu = NULL;
+ int i;
+
+ if (id < 0)
+ return NULL;
+ if (id < KVM_MAX_VCPUS)
+ vcpu = kvm_get_vcpu(kvm, id);
+ if (vcpu && vcpu->vcpu_id == id)
+ return vcpu;
+ kvm_for_each_vcpu(i, vcpu, kvm)
+ if (vcpu->vcpu_id == id)
+ return vcpu;
+ return NULL;
+}
+
+static inline int kvm_vcpu_get_idx(struct kvm_vcpu *vcpu)
+{
+ struct kvm_vcpu *tmp;
+ int idx;
+
+ kvm_for_each_vcpu(idx, tmp, vcpu->kvm)
+ if (tmp == vcpu)
+ return idx;
+ BUG();
+}
+
+#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);
+
+void vcpu_load(struct kvm_vcpu *vcpu);
+void vcpu_put(struct kvm_vcpu *vcpu);
+
+#ifdef __KVM_HAVE_IOAPIC
+void kvm_arch_post_irq_ack_notifier_list_update(struct kvm *kvm);
+void kvm_arch_post_irq_routing_update(struct kvm *kvm);
+#else
+static inline void kvm_arch_post_irq_ack_notifier_list_update(struct kvm *kvm)
+{
+}
+static inline void kvm_arch_post_irq_routing_update(struct kvm *kvm)
+{
+}
+#endif
+
+#ifdef CONFIG_HAVE_KVM_IRQFD
+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);
+
+static inline struct kvm_memslots *__kvm_memslots(struct kvm *kvm, int as_id)
+{
+ return srcu_dereference_check(kvm->memslots[as_id], &kvm->srcu,
+ lockdep_is_held(&kvm->slots_lock) ||
+ !refcount_read(&kvm->users_count));
+}
+
+static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
+{
+ return __kvm_memslots(kvm, 0);
+}
+
+static inline struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu)
+{
+ int as_id = kvm_arch_vcpu_memslots_id(vcpu);
+
+ return __kvm_memslots(vcpu->kvm, as_id);
+}
+
+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,
+ const struct kvm_userspace_memory_region *mem);
+int __kvm_set_memory_region(struct kvm *kvm,
+ const struct kvm_userspace_memory_region *mem);
+void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
+ struct kvm_memory_slot *dont);
+int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
+ unsigned long npages);
+void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots);
+int kvm_arch_prepare_memory_region(struct kvm *kvm,
+ struct kvm_memory_slot *memslot,
+ const struct kvm_userspace_memory_region *mem,
+ enum kvm_mr_change change);
+void kvm_arch_commit_memory_region(struct kvm *kvm,
+ const struct kvm_userspace_memory_region *mem,
+ const struct kvm_memory_slot *old,
+ const struct kvm_memory_slot *new,
+ 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_memory_slot *slot, 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_prot(struct kvm *kvm, gfn_t gfn, bool *writable);
+unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
+unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn,
+ bool *writable);
+void kvm_release_page_clean(struct page *page);
+void kvm_release_page_dirty(struct page *page);
+void kvm_set_page_accessed(struct page *page);
+
+kvm_pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
+kvm_pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
+kvm_pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
+ bool *writable);
+kvm_pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
+kvm_pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
+kvm_pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn,
+ bool atomic, bool *async, bool write_fault,
+ bool *writable);
+
+void kvm_release_pfn_clean(kvm_pfn_t pfn);
+void kvm_release_pfn_dirty(kvm_pfn_t pfn);
+void kvm_set_pfn_dirty(kvm_pfn_t pfn);
+void kvm_set_pfn_accessed(kvm_pfn_t pfn);
+void kvm_get_pfn(kvm_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_write_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
+ void *data, int offset, unsigned long len);
+int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
+ gpa_t gpa, unsigned long len);
+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);
+bool 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);
+
+struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu);
+struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn);
+kvm_pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn);
+kvm_pfn_t kvm_vcpu_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
+struct page *kvm_vcpu_gfn_to_page(struct kvm_vcpu *vcpu, gfn_t gfn);
+unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn);
+unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu *vcpu, gfn_t gfn, bool *writable);
+int kvm_vcpu_read_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, void *data, int offset,
+ int len);
+int kvm_vcpu_read_guest_atomic(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
+ unsigned long len);
+int kvm_vcpu_read_guest(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
+ unsigned long len);
+int kvm_vcpu_write_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, const void *data,
+ int offset, int len);
+int kvm_vcpu_write_guest(struct kvm_vcpu *vcpu, gpa_t gpa, const void *data,
+ unsigned long len);
+void kvm_vcpu_mark_page_dirty(struct kvm_vcpu *vcpu, gfn_t gfn);
+
+void kvm_sigset_activate(struct kvm_vcpu *vcpu);
+void kvm_sigset_deactivate(struct kvm_vcpu *vcpu);
+
+void kvm_vcpu_block(struct kvm_vcpu *vcpu);
+void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu);
+void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu);
+bool kvm_vcpu_wake_up(struct kvm_vcpu *vcpu);
+void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
+int kvm_vcpu_yield_to(struct kvm_vcpu *target);
+void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu, bool usermode_vcpu_not_eligible);
+
+void kvm_flush_remote_tlbs(struct kvm *kvm);
+void kvm_reload_remote_mmus(struct kvm *kvm);
+
+bool kvm_make_vcpus_request_mask(struct kvm *kvm, unsigned int req,
+ unsigned long *vcpu_bitmap, cpumask_var_t tmp);
+bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);
+
+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);
+vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
+
+int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext);
+
+int kvm_get_dirty_log(struct kvm *kvm,
+ struct kvm_dirty_log *log, int *is_dirty);
+
+int kvm_get_dirty_log_protect(struct kvm *kvm,
+ struct kvm_dirty_log *log, bool *is_dirty);
+
+void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
+ struct kvm_memory_slot *slot,
+ gfn_t gfn_offset,
+ unsigned long mask);
+
+int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
+ struct kvm_dirty_log *log);
+
+int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
+ bool line_status);
+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_sched_in(struct kvm_vcpu *vcpu, int cpu);
+
+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);
+void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
+void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
+
+bool kvm_arch_has_vcpu_debugfs(void);
+int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu);
+
+int kvm_arch_hardware_enable(void);
+void kvm_arch_hardware_disable(void);
+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);
+bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu);
+int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
+
+#ifndef __KVM_HAVE_ARCH_VM_ALLOC
+/*
+ * All architectures that want to use vzalloc currently also
+ * need their own kvm_arch_alloc_vm implementation.
+ */
+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
+
+#ifndef __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB
+static inline int kvm_arch_flush_remote_tlb(struct kvm *kvm)
+{
+ return -ENOTSUPP;
+}
+#endif
+
+#ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
+void kvm_arch_register_noncoherent_dma(struct kvm *kvm);
+void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm);
+bool kvm_arch_has_noncoherent_dma(struct kvm *kvm);
+#else
+static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm)
+{
+}
+
+static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm)
+{
+}
+
+static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
+{
+ return false;
+}
+#endif
+#ifdef __KVM_HAVE_ARCH_ASSIGNED_DEVICE
+void kvm_arch_start_assignment(struct kvm *kvm);
+void kvm_arch_end_assignment(struct kvm *kvm);
+bool kvm_arch_has_assigned_device(struct kvm *kvm);
+#else
+static inline void kvm_arch_start_assignment(struct kvm *kvm)
+{
+}
+
+static inline void kvm_arch_end_assignment(struct kvm *kvm)
+{
+}
+
+static inline bool kvm_arch_has_assigned_device(struct kvm *kvm)
+{
+ return false;
+}
+#endif
+
+static inline struct swait_queue_head *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
+{
+#ifdef __KVM_HAVE_ARCH_WQP
+ return vcpu->arch.wqp;
+#else
+ return &vcpu->wq;
+#endif
+}
+
+#ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
+/*
+ * returns true if the virtual interrupt controller is initialized and
+ * ready to accept virtual IRQ. On some architectures the virtual interrupt
+ * controller is dynamically instantiated and this is not always true.
+ */
+bool kvm_arch_intc_initialized(struct kvm *kvm);
+#else
+static inline bool kvm_arch_intc_initialized(struct kvm *kvm)
+{
+ return true;
+}
+#endif
+
+int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
+void kvm_arch_destroy_vm(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_reserved_pfn(kvm_pfn_t pfn);
+
+struct kvm_irq_ack_notifier {
+ struct hlist_node link;
+ unsigned gsi;
+ void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
+};
+
+int kvm_irq_map_gsi(struct kvm *kvm,
+ struct kvm_kernel_irq_routing_entry *entries, int gsi);
+int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin);
+
+int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
+ bool line_status);
+int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
+ int irq_source_id, int level, bool line_status);
+int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
+ struct kvm *kvm, int irq_source_id,
+ int level, bool line_status);
+bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
+void kvm_notify_acked_gsi(struct kvm *kvm, int gsi);
+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);
+
+/*
+ * 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)
+{
+ int start = 0, end = slots->used_slots;
+ int slot = atomic_read(&slots->lru_slot);
+ struct kvm_memory_slot *memslots = slots->memslots;
+
+ if (gfn >= memslots[slot].base_gfn &&
+ gfn < memslots[slot].base_gfn + memslots[slot].npages)
+ return &memslots[slot];
+
+ while (start < end) {
+ slot = start + (end - start) / 2;
+
+ if (gfn >= memslots[slot].base_gfn)
+ end = slot;
+ else
+ start = slot + 1;
+ }
+
+ if (gfn >= memslots[start].base_gfn &&
+ gfn < memslots[start].base_gfn + memslots[start].npages) {
+ atomic_set(&slots->lru_slot, start);
+ return &memslots[start];
+ }
+
+ 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
+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(kvm_pfn_t pfn)
+{
+ return (hpa_t)pfn << PAGE_SHIFT;
+}
+
+static inline struct page *kvm_vcpu_gpa_to_page(struct kvm_vcpu *vcpu,
+ gpa_t gpa)
+{
+ return kvm_vcpu_gfn_to_page(vcpu, gpa_to_gfn(gpa));
+}
+
+static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa)
+{
+ unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
+
+ return kvm_is_error_hva(hva);
+}
+
+enum kvm_stat_kind {
+ KVM_STAT_VM,
+ KVM_STAT_VCPU,
+};
+
+struct kvm_stat_data {
+ int offset;
+ struct kvm *kvm;
+};
+
+struct kvm_stats_debugfs_item {
+ const char *name;
+ int offset;
+ enum kvm_stat_kind kind;
+};
+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 CONFIG_HAVE_KVM_IRQ_ROUTING
+
+#define KVM_MAX_IRQ_ROUTES 4096 /* might need extension/rework in the future */
+
+bool kvm_arch_can_set_irq_routing(struct kvm *kvm);
+int kvm_set_irq_routing(struct kvm *kvm,
+ const struct kvm_irq_routing_entry *entries,
+ unsigned nr,
+ unsigned flags);
+int kvm_set_routing_entry(struct kvm *kvm,
+ struct kvm_kernel_irq_routing_entry *e,
+ const struct kvm_irq_routing_entry *ue);
+void kvm_free_irq_routing(struct kvm *kvm);
+
+#else
+
+static inline void kvm_free_irq_routing(struct kvm *kvm) {}
+
+#endif
+
+int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
+
+#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_IRQFD
+int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
+void kvm_irqfd_release(struct kvm *kvm);
+void kvm_irq_routing_update(struct kvm *);
+#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)
+{
+}
+#endif
+
+static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
+{
+ return -ENOSYS;
+}
+
+#endif /* CONFIG_HAVE_KVM_EVENTFD */
+
+void kvm_arch_irq_routing_update(struct kvm *kvm);
+
+static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
+{
+ /*
+ * Ensure the rest of the request is published to kvm_check_request's
+ * caller. Paired with the smp_mb__after_atomic in kvm_check_request.
+ */
+ smp_wmb();
+ set_bit(req & KVM_REQUEST_MASK, (void *)&vcpu->requests);
+}
+
+static inline bool kvm_request_pending(struct kvm_vcpu *vcpu)
+{
+ return READ_ONCE(vcpu->requests);
+}
+
+static inline bool kvm_test_request(int req, struct kvm_vcpu *vcpu)
+{
+ return test_bit(req & KVM_REQUEST_MASK, (void *)&vcpu->requests);
+}
+
+static inline void kvm_clear_request(int req, struct kvm_vcpu *vcpu)
+{
+ clear_bit(req & KVM_REQUEST_MASK, (void *)&vcpu->requests);
+}
+
+static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
+{
+ if (kvm_test_request(req, vcpu)) {
+ kvm_clear_request(req, vcpu);
+
+ /*
+ * Ensure the rest of the request is visible to kvm_check_request's
+ * caller. Paired with the smp_wmb in kvm_make_request.
+ */
+ smp_mb__after_atomic();
+ return true;
+ } else {
+ return false;
+ }
+}
+
+extern bool kvm_rebooting;
+
+extern unsigned int halt_poll_ns;
+extern unsigned int halt_poll_ns_grow;
+extern unsigned int halt_poll_ns_shrink;
+
+struct kvm_device {
+ struct kvm_device_ops *ops;
+ struct kvm *kvm;
+ void *private;
+ struct list_head vm_node;
+};
+
+/* create, destroy, and name are mandatory */
+struct kvm_device_ops {
+ const char *name;
+
+ /*
+ * create is called holding kvm->lock and any operations not suitable
+ * to do while holding the lock should be deferred to init (see
+ * below).
+ */
+ int (*create)(struct kvm_device *dev, u32 type);
+
+ /*
+ * init is called after create if create is successful and is called
+ * outside of holding kvm->lock.
+ */
+ void (*init)(struct kvm_device *dev);
+
+ /*
+ * Destroy is responsible for freeing dev.
+ *
+ * Destroy may be called before or after destructors are called
+ * on emulated I/O regions, depending on whether a reference is
+ * held by a vcpu or other kvm component that gets destroyed
+ * after the emulated I/O.
+ */
+ void (*destroy)(struct kvm_device *dev);
+
+ int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
+ int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
+ int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
+ long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
+ unsigned long arg);
+};
+
+void kvm_device_get(struct kvm_device *dev);
+void kvm_device_put(struct kvm_device *dev);
+struct kvm_device *kvm_device_from_filp(struct file *filp);
+int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type);
+void kvm_unregister_device_ops(u32 type);
+
+extern struct kvm_device_ops kvm_mpic_ops;
+extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
+extern struct kvm_device_ops kvm_arm_vgic_v3_ops;
+
+#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)
+{
+}
+#endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
+
+#ifdef CONFIG_HAVE_KVM_IRQ_BYPASS
+bool kvm_arch_has_irq_bypass(void);
+int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *,
+ struct irq_bypass_producer *);
+void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *,
+ struct irq_bypass_producer *);
+void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *);
+void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *);
+int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq,
+ uint32_t guest_irq, bool set);
+#endif /* CONFIG_HAVE_KVM_IRQ_BYPASS */
+
+#ifdef CONFIG_HAVE_KVM_INVALID_WAKEUPS
+/* If we wakeup during the poll time, was it a sucessful poll? */
+static inline bool vcpu_valid_wakeup(struct kvm_vcpu *vcpu)
+{
+ return vcpu->valid_wakeup;
+}
+
+#else
+static inline bool vcpu_valid_wakeup(struct kvm_vcpu *vcpu)
+{
+ return true;
+}
+#endif /* CONFIG_HAVE_KVM_INVALID_WAKEUPS */
+
+#ifdef CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL
+long kvm_arch_vcpu_async_ioctl(struct file *filp,
+ unsigned int ioctl, unsigned long arg);
+#else
+static inline long kvm_arch_vcpu_async_ioctl(struct file *filp,
+ unsigned int ioctl,
+ unsigned long arg)
+{
+ return -ENOIOCTLCMD;
+}
+#endif /* CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL */
+
+int kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm,
+ unsigned long start, unsigned long end, bool blockable);
+
+#ifdef CONFIG_HAVE_KVM_VCPU_RUN_PID_CHANGE
+int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu);
+#else
+static inline int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu)
+{
+ return 0;
+}
+#endif /* CONFIG_HAVE_KVM_VCPU_RUN_PID_CHANGE */
+
+#endif