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Diffstat (limited to '')
| -rw-r--r-- | include/linux/kvm_host.h | 1351 |
1 files changed, 1351 insertions, 0 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h new file mode 100644 index 000000000..827f70ce0 --- /dev/null +++ b/include/linux/kvm_host.h @@ -0,0 +1,1351 @@ +#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 <linux/nospec.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 struct mutex 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; + gpa_t cr2_or_gpa; + 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, gpa_t cr2_or_gpa, + 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, +}; + +#define KVM_UNMAPPED_PAGE ((void *) 0x500 + POISON_POINTER_DELTA) + +struct kvm_host_map { + /* + * Only valid if the 'pfn' is managed by the host kernel (i.e. There is + * a 'struct page' for it. When using mem= kernel parameter some memory + * can be used as guest memory but they are not managed by host + * kernel). + * If 'pfn' is not managed by the host kernel, this field is + * initialized to KVM_UNMAPPED_PAGE. + */ + struct page *page; + void *hva; + kvm_pfn_t pfn; + kvm_pfn_t gfn; +}; + +/* + * Used to check if the mapping is valid or not. Never use 'kvm_host_map' + * directly to check for that. + */ +static inline bool kvm_vcpu_mapped(struct kvm_host_map *map) +{ + return !!map->hva; +} + +/* + * 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; /* id given by userspace at creation */ + int vcpu_idx; /* index in kvm->vcpus array */ + 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) +{ + int num_vcpus = atomic_read(&kvm->online_vcpus); + i = array_index_nospec(i, num_vcpus); + + /* Pairs with smp_wmb() in kvm_vm_ioctl_create_vcpu. */ + 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) +{ + return vcpu->vcpu_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); + +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) +{ + as_id = array_index_nospec(as_id, KVM_ADDRESS_SPACE_NUM); + 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, u64 gen); +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); + +void kvm_release_pfn(kvm_pfn_t pfn, bool dirty, struct gfn_to_pfn_cache *cache); +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, unsigned 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_vcpu *vcpu, 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); +int kvm_vcpu_map(struct kvm_vcpu *vcpu, gpa_t gpa, struct kvm_host_map *map); +int kvm_map_gfn(struct kvm_vcpu *vcpu, gfn_t gfn, struct kvm_host_map *map, + struct gfn_to_pfn_cache *cache, bool atomic); +struct page *kvm_vcpu_gfn_to_page(struct kvm_vcpu *vcpu, gfn_t gfn); +void kvm_vcpu_unmap(struct kvm_vcpu *vcpu, struct kvm_host_map *map, bool dirty); +int kvm_unmap_gfn(struct kvm_vcpu *vcpu, struct kvm_host_map *map, + struct gfn_to_pfn_cache *cache, bool dirty, bool atomic); +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); +bool kvm_arch_dy_runnable(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); +bool kvm_is_zone_device_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 (start < slots->used_slots && 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) +{ + /* + * The index was checked originally in search_memslots. To avoid + * that a malicious guest builds a Spectre gadget out of e.g. page + * table walks, do not let the processor speculate loads outside + * the guest's registered memslots. + */ + unsigned long offset = gfn - slot->base_gfn; + offset = array_index_nospec(offset, slot->npages); + return slot->userspace_addr + offset * 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; + int mode; + struct kvm *kvm; +}; + +struct kvm_stats_debugfs_item { + const char *name; + int offset; + enum kvm_stat_kind kind; + int mode; +}; +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 */ + +void kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm, + unsigned long start, unsigned long end); + +#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 */ + +typedef int (*kvm_vm_thread_fn_t)(struct kvm *kvm, uintptr_t data); + +int kvm_vm_create_worker_thread(struct kvm *kvm, kvm_vm_thread_fn_t thread_fn, + uintptr_t data, const char *name, + struct task_struct **thread_ptr); + +#endif |