| /* SPDX-License-Identifier: GPL-2.0-only */ |
| #ifndef __KVM_HOST_H |
| #define __KVM_HOST_H |
| |
| |
| #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/minmax.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/rcuwait.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> |
| #include <linux/kvm_dirty_ring.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) |
| |
| /* |
| * Bit 63 of the memslot generation number is an "update in-progress flag", |
| * e.g. is temporarily set for the duration of install_new_memslots(). |
| * This flag effectively creates a unique generation number that is used to |
| * mark cached memslot data, e.g. MMIO accesses, as potentially being stale, |
| * i.e. may (or may not) have come from the previous memslots generation. |
| * |
| * This is necessary because the actual memslots update is not atomic with |
| * respect to the generation number update. Updating the generation number |
| * first would allow a vCPU to cache a spte from the old memslots using the |
| * new generation number, and updating the generation number after switching |
| * to the new memslots would allow cache hits using the old generation number |
| * to reference the defunct memslots. |
| * |
| * This mechanism is used to prevent getting hits in KVM's caches while a |
| * memslot update is in-progress, and to prevent cache hits *after* updating |
| * the actual generation number against accesses that were inserted into the |
| * cache *before* the memslots were updated. |
| */ |
| #define KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS BIT_ULL(63) |
| |
| /* 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) >= (sizeof_field(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 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; |
| bool notpresent_injected; |
| }; |
| |
| void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu); |
| void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu); |
| bool 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; |
| |
| struct rcuwait wait; |
| 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; |
| bool ready; |
| struct kvm_vcpu_arch arch; |
| struct kvm_dirty_ring dirty_ring; |
| }; |
| |
| 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; |
| u16 as_id; |
| }; |
| |
| static inline bool kvm_slot_dirty_track_enabled(struct kvm_memory_slot *slot) |
| { |
| return slot->flags & KVM_MEM_LOG_DIRTY_PAGES; |
| } |
| |
| 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); |
| } |
| |
| #ifndef KVM_DIRTY_LOG_MANUAL_CAPS |
| #define KVM_DIRTY_LOG_MANUAL_CAPS KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE |
| #endif |
| |
| 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[]; |
| }; |
| #endif |
| |
| #ifndef KVM_PRIVATE_MEM_SLOTS |
| #define KVM_PRIVATE_MEM_SLOTS 0 |
| #endif |
| |
| #define KVM_MEM_SLOTS_NUM SHRT_MAX |
| #define KVM_USER_MEM_SLOTS (KVM_MEM_SLOTS_NUM - KVM_PRIVATE_MEM_SLOTS) |
| |
| #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; |
| /* 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_memory_slot memslots[]; |
| }; |
| |
| struct kvm { |
| #ifdef KVM_HAVE_MMU_RWLOCK |
| rwlock_t mmu_lock; |
| #else |
| spinlock_t mmu_lock; |
| #endif /* KVM_HAVE_MMU_RWLOCK */ |
| |
| 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; |
| unsigned long mmu_notifier_range_start; |
| unsigned long mmu_notifier_range_end; |
| #endif |
| long tlbs_dirty; |
| struct list_head devices; |
| u64 manual_dirty_log_protect; |
| struct dentry *debugfs_dentry; |
| struct kvm_stat_data **debugfs_stat_data; |
| struct srcu_struct srcu; |
| struct srcu_struct irq_srcu; |
| pid_t userspace_pid; |
| unsigned int max_halt_poll_ns; |
| u32 dirty_ring_size; |
| }; |
| |
| #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 bool kvm_dirty_log_manual_protect_and_init_set(struct kvm *kvm) |
| { |
| return !!(kvm->manual_dirty_log_protect & KVM_DIRTY_LOG_INITIALLY_SET); |
| } |
| |
| 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 + slots->used_slots; memslot++) \ |
| if (WARN_ON_ONCE(!memslot->npages)) { \ |
| } else |
| |
| void kvm_vcpu_destroy(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); |
| void kvm_put_kvm_no_destroy(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; |
| |
| if (index < 0) |
| return NULL; |
| |
| 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 *slot); |
| 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, |
| struct kvm_memory_slot *old, |
| const struct kvm_memory_slot *new, |
| enum kvm_mr_change change); |
| /* 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(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, hva_t *hva); |
| |
| 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(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_read_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
| void *data, unsigned int offset, |
| 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); |
| |
| #define __kvm_get_guest(kvm, gfn, offset, v) \ |
| ({ \ |
| unsigned long __addr = gfn_to_hva(kvm, gfn); \ |
| typeof(v) __user *__uaddr = (typeof(__uaddr))(__addr + offset); \ |
| int __ret = -EFAULT; \ |
| \ |
| if (!kvm_is_error_hva(__addr)) \ |
| __ret = get_user(v, __uaddr); \ |
| __ret; \ |
| }) |
| |
| #define kvm_get_guest(kvm, gpa, v) \ |
| ({ \ |
| gpa_t __gpa = gpa; \ |
| struct kvm *__kvm = kvm; \ |
| \ |
| __kvm_get_guest(__kvm, __gpa >> PAGE_SHIFT, \ |
| offset_in_page(__gpa), v); \ |
| }) |
| |
| #define __kvm_put_guest(kvm, gfn, offset, v) \ |
| ({ \ |
| unsigned long __addr = gfn_to_hva(kvm, gfn); \ |
| typeof(v) __user *__uaddr = (typeof(__uaddr))(__addr + offset); \ |
| int __ret = -EFAULT; \ |
| \ |
| if (!kvm_is_error_hva(__addr)) \ |
| __ret = put_user(v, __uaddr); \ |
| if (!__ret) \ |
| mark_page_dirty(kvm, gfn); \ |
| __ret; \ |
| }) |
| |
| #define kvm_put_guest(kvm, gpa, v) \ |
| ({ \ |
| gpa_t __gpa = gpa; \ |
| struct kvm *__kvm = kvm; \ |
| \ |
| __kvm_put_guest(__kvm, __gpa >> PAGE_SHIFT, \ |
| offset_in_page(__gpa), v); \ |
| }) |
| |
| 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); |
| bool kvm_vcpu_is_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn); |
| unsigned long kvm_host_page_size(struct kvm_vcpu *vcpu, gfn_t gfn); |
| void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot, 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); |
| |
| #ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE |
| int kvm_mmu_topup_memory_cache(struct kvm_mmu_memory_cache *mc, int min); |
| int kvm_mmu_memory_cache_nr_free_objects(struct kvm_mmu_memory_cache *mc); |
| void kvm_mmu_free_memory_cache(struct kvm_mmu_memory_cache *mc); |
| void *kvm_mmu_memory_cache_alloc(struct kvm_mmu_memory_cache *mc); |
| #endif |
| |
| bool kvm_make_vcpus_request_mask(struct kvm *kvm, unsigned int req, |
| struct kvm_vcpu *except, |
| unsigned long *vcpu_bitmap, cpumask_var_t tmp); |
| bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req); |
| bool kvm_make_all_cpus_request_except(struct kvm *kvm, unsigned int req, |
| struct kvm_vcpu *except); |
| bool kvm_make_cpus_request_mask(struct kvm *kvm, unsigned int req, |
| unsigned long *vcpu_bitmap); |
| |
| 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); |
| |
| void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm, |
| struct kvm_memory_slot *slot, |
| gfn_t gfn_offset, |
| unsigned long mask); |
| void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot); |
| |
| #ifdef CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT |
| void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm, |
| struct kvm_memory_slot *memslot); |
| #else /* !CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT */ |
| int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log); |
| int kvm_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log, |
| int *is_dirty, struct kvm_memory_slot **memslot); |
| #endif |
| |
| int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level, |
| bool line_status); |
| int kvm_vm_ioctl_enable_cap(struct kvm *kvm, |
| struct kvm_enable_cap *cap); |
| 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); |
| |
| int kvm_arch_init(void *opaque); |
| void kvm_arch_exit(void); |
| |
| void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu); |
| |
| void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); |
| void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); |
| int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id); |
| int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu); |
| void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu); |
| void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); |
| |
| #ifdef __KVM_HAVE_ARCH_VCPU_DEBUGFS |
| void kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry); |
| #endif |
| |
| int kvm_arch_hardware_enable(void); |
| void kvm_arch_hardware_disable(void); |
| int kvm_arch_hardware_setup(void *opaque); |
| void kvm_arch_hardware_unsetup(void); |
| int kvm_arch_check_processor_compat(void *opaque); |
| 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); |
| int kvm_arch_post_init_vm(struct kvm *kvm); |
| void kvm_arch_pre_destroy_vm(struct kvm *kvm); |
| |
| #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 rcuwait *kvm_arch_vcpu_get_wait(struct kvm_vcpu *vcpu) |
| { |
| #ifdef __KVM_HAVE_ARCH_WQP |
| return vcpu->arch.waitp; |
| #else |
| return &vcpu->wait; |
| #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); |
| |
| bool kvm_is_reserved_pfn(kvm_pfn_t pfn); |
| bool kvm_is_zone_device_pfn(kvm_pfn_t pfn); |
| bool kvm_is_transparent_hugepage(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); |
| bool kvm_arch_irqfd_allowed(struct kvm *kvm, struct kvm_irqfd *args); |
| |
| /* |
| * 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. |
| * |
| * IMPORTANT: Slots are sorted from highest GFN to lowest GFN! |
| */ |
| 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 (unlikely(!slots->used_slots)) |
| return NULL; |
| |
| 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) |
| { |
| 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 { |
| struct kvm *kvm; |
| struct kvm_stats_debugfs_item *dbgfs_item; |
| }; |
| |
| struct kvm_stats_debugfs_item { |
| const char *name; |
| int offset; |
| enum kvm_stat_kind kind; |
| int mode; |
| }; |
| |
| #define KVM_DBGFS_GET_MODE(dbgfs_item) \ |
| ((dbgfs_item)->mode ? (dbgfs_item)->mode : 0644) |
| |
| #define VM_STAT(n, x, ...) \ |
| { n, offsetof(struct kvm, stat.x), KVM_STAT_VM, ## __VA_ARGS__ } |
| #define VCPU_STAT(n, x, ...) \ |
| { n, offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU, ## __VA_ARGS__ } |
| |
| 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; |
| } |
| |
| static inline int mmu_notifier_retry_hva(struct kvm *kvm, |
| unsigned long mmu_seq, |
| unsigned long hva) |
| { |
| lockdep_assert_held(&kvm->mmu_lock); |
| /* |
| * If mmu_notifier_count is non-zero, then the range maintained by |
| * kvm_mmu_notifier_invalidate_range_start contains all addresses that |
| * might be being invalidated. Note that it may include some false |
| * positives, due to shortcuts when handing concurrent invalidations. |
| */ |
| if (unlikely(kvm->mmu_notifier_count) && |
| hva >= kvm->mmu_notifier_range_start && |
| hva < kvm->mmu_notifier_range_end) |
| return 1; |
| 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_grow_start; |
| extern unsigned int halt_poll_ns_shrink; |
| |
| struct kvm_device { |
| const 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); |
| |
| /* |
| * Release is an alternative method to free the device. It is |
| * called when the device file descriptor is closed. Once |
| * release is called, the destroy method will not be called |
| * anymore as the device is removed from the device list of |
| * the VM. kvm->lock is held. |
| */ |
| void (*release)(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); |
| int (*mmap)(struct kvm_device *dev, struct vm_area_struct *vma); |
| }; |
| |
| 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(const 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 */ |
| |
| static inline bool kvm_is_visible_memslot(struct kvm_memory_slot *memslot) |
| { |
| return (memslot && memslot->id < KVM_USER_MEM_SLOTS && |
| !(memslot->flags & KVM_MEMSLOT_INVALID)); |
| } |
| |
| struct kvm_vcpu *kvm_get_running_vcpu(void); |
| struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void); |
| |
| #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_NO_POLL |
| /* Callback that tells if we must not poll */ |
| bool kvm_arch_no_poll(struct kvm_vcpu *vcpu); |
| #else |
| static inline bool kvm_arch_no_poll(struct kvm_vcpu *vcpu) |
| { |
| return false; |
| } |
| #endif /* CONFIG_HAVE_KVM_NO_POLL */ |
| |
| #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); |
| |
| #ifdef CONFIG_KVM_XFER_TO_GUEST_WORK |
| static inline void kvm_handle_signal_exit(struct kvm_vcpu *vcpu) |
| { |
| vcpu->run->exit_reason = KVM_EXIT_INTR; |
| vcpu->stat.signal_exits++; |
| } |
| #endif /* CONFIG_KVM_XFER_TO_GUEST_WORK */ |
| |
| /* |
| * This defines how many reserved entries we want to keep before we |
| * kick the vcpu to the userspace to avoid dirty ring full. This |
| * value can be tuned to higher if e.g. PML is enabled on the host. |
| */ |
| #define KVM_DIRTY_RING_RSVD_ENTRIES 64 |
| |
| /* Max number of entries allowed for each kvm dirty ring */ |
| #define KVM_DIRTY_RING_MAX_ENTRIES 65536 |
| |
| #endif |