#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/mm.h> #include <linux/mmu_notifier.h> #include <linux/preempt.h> #include <linux/msi.h> #include <linux/slab.h> #include <linux/rcupdate.h> #include <linux/ratelimit.h> #include <asm/signal.h> #include <linux/kvm.h> #include <linux/kvm_para.h> #include <linux/kvm_types.h> #include <asm/kvm_host.h> #ifndef KVM_MMIO_SIZE #define KVM_MMIO_SIZE 8 #endif /* * vcpu->requests bit members */ #define KVM_REQ_TLB_FLUSH 0 #define KVM_REQ_MIGRATE_TIMER 1 #define KVM_REQ_REPORT_TPR_ACCESS 2 #define KVM_REQ_MMU_RELOAD 3 #define KVM_REQ_TRIPLE_FAULT 4 #define KVM_REQ_PENDING_TIMER 5 #define KVM_REQ_UNHALT 6 #define KVM_REQ_MMU_SYNC 7 #define KVM_REQ_CLOCK_UPDATE 8 #define KVM_REQ_KICK 9 #define KVM_REQ_DEACTIVATE_FPU 10 #define KVM_REQ_EVENT 11 #define KVM_REQ_APF_HALT 12 #define KVM_REQ_STEAL_UPDATE 13 #define KVM_REQ_NMI 14 #define KVM_REQ_IMMEDIATE_EXIT 15 #define KVM_REQ_PMU 16 #define KVM_REQ_PMI 17 #define KVM_USERSPACE_IRQ_SOURCE_ID 0 struct kvm; struct kvm_vcpu; extern struct kmem_cache *kvm_vcpu_cache; struct kvm_io_range { gpa_t addr; int len; struct kvm_io_device *dev; }; struct kvm_io_bus { int dev_count; #define NR_IOBUS_DEVS 300 struct kvm_io_range range[NR_IOBUS_DEVS]; }; enum kvm_bus { KVM_MMIO_BUS, KVM_PIO_BUS, KVM_NR_BUSES }; int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len, const void *val); int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len, void *val); int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len, struct kvm_io_device *dev); int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx, struct kvm_io_device *dev); #ifdef CONFIG_KVM_ASYNC_PF struct kvm_async_pf { struct work_struct work; struct list_head link; struct list_head queue; struct kvm_vcpu *vcpu; struct mm_struct *mm; gva_t gva; unsigned long addr; struct kvm_arch_async_pf arch; struct page *page; bool done; }; void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu); void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu); int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn, struct kvm_arch_async_pf *arch); int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu); #endif enum { OUTSIDE_GUEST_MODE, IN_GUEST_MODE, EXITING_GUEST_MODE }; struct kvm_vcpu { struct kvm *kvm; #ifdef CONFIG_PREEMPT_NOTIFIERS struct preempt_notifier preempt_notifier; #endif int cpu; int vcpu_id; int srcu_idx; int mode; unsigned long requests; unsigned long guest_debug; struct mutex mutex; struct kvm_run *run; int fpu_active; int guest_fpu_loaded, guest_xcr0_loaded; wait_queue_head_t wq; struct pid *pid; int sigset_active; sigset_t sigset; struct kvm_vcpu_stat stat; #ifdef CONFIG_HAS_IOMEM int mmio_needed; int mmio_read_completed; int mmio_is_write; int mmio_size; int mmio_index; unsigned char mmio_data[KVM_MMIO_SIZE]; gpa_t mmio_phys_addr; #endif #ifdef CONFIG_KVM_ASYNC_PF struct { u32 queued; struct list_head queue; struct list_head done; spinlock_t lock; } async_pf; #endif struct kvm_vcpu_arch arch; }; static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu) { return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE); } /* * Some of the bitops functions do not support too long bitmaps. * This number must be determined not to exceed such limits. */ #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1) struct kvm_lpage_info { unsigned long rmap_pde; int write_count; }; struct kvm_memory_slot { gfn_t base_gfn; unsigned long npages; unsigned long flags; unsigned long *rmap; unsigned long *dirty_bitmap; unsigned long *dirty_bitmap_head; unsigned long nr_dirty_pages; struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1]; unsigned long userspace_addr; int user_alloc; int id; }; static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot) { return ALIGN(memslot->npages, BITS_PER_LONG) / 8; } struct kvm_kernel_irq_routing_entry { u32 gsi; u32 type; int (*set)(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm, int irq_source_id, int level); union { struct { unsigned irqchip; unsigned pin; } irqchip; struct msi_msg msi; }; struct hlist_node link; }; #ifdef __KVM_HAVE_IOAPIC struct kvm_irq_routing_table { int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS]; struct kvm_kernel_irq_routing_entry *rt_entries; u32 nr_rt_entries; /* * Array indexed by gsi. Each entry contains list of irq chips * the gsi is connected to. */ struct hlist_head map[0]; }; #else struct kvm_irq_routing_table {}; #endif #ifndef KVM_MEM_SLOTS_NUM #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS) #endif /* * Note: * memslots are not sorted by id anymore, please use id_to_memslot() * to get the memslot by its id. */ struct kvm_memslots { u64 generation; struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM]; /* The mapping table from slot id to the index in memslots[]. */ int id_to_index[KVM_MEM_SLOTS_NUM]; }; struct kvm { spinlock_t mmu_lock; struct mutex slots_lock; struct mm_struct *mm; /* userspace tied to this vm */ struct kvm_memslots *memslots; struct srcu_struct srcu; #ifdef CONFIG_KVM_APIC_ARCHITECTURE u32 bsp_vcpu_id; #endif struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; atomic_t online_vcpus; int last_boosted_vcpu; struct list_head vm_list; struct mutex lock; struct kvm_io_bus *buses[KVM_NR_BUSES]; #ifdef CONFIG_HAVE_KVM_EVENTFD struct { spinlock_t lock; struct list_head items; } irqfds; struct list_head ioeventfds; #endif struct kvm_vm_stat stat; struct kvm_arch arch; atomic_t users_count; #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; spinlock_t ring_lock; struct list_head coalesced_zones; #endif struct mutex irq_lock; #ifdef CONFIG_HAVE_KVM_IRQCHIP /* * Update side is protected by irq_lock and, * if configured, irqfds.lock. */ struct kvm_irq_routing_table __rcu *irq_routing; struct hlist_head mask_notifier_list; struct hlist_head irq_ack_notifier_list; #endif #ifdef KVM_ARCH_WANT_MMU_NOTIFIER struct mmu_notifier mmu_notifier; unsigned long mmu_notifier_seq; long mmu_notifier_count; #endif long tlbs_dirty; }; /* The guest did something we don't support. */ #define pr_unimpl(vcpu, fmt, ...) \ pr_err_ratelimited("kvm: %i: cpu%i " fmt, \ current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__) #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt) #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt) static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i) { smp_rmb(); return kvm->vcpus[i]; } #define kvm_for_each_vcpu(idx, vcpup, kvm) \ for (idx = 0; \ idx < atomic_read(&kvm->online_vcpus) && \ (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \ idx++) #define kvm_for_each_memslot(memslot, slots) \ for (memslot = &slots->memslots[0]; \ memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\ memslot++) int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); void vcpu_load(struct kvm_vcpu *vcpu); void vcpu_put(struct kvm_vcpu *vcpu); int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, struct module *module); void kvm_exit(void); void kvm_get_kvm(struct kvm *kvm); void kvm_put_kvm(struct kvm *kvm); void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new); static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm) { return rcu_dereference_check(kvm->memslots, srcu_read_lock_held(&kvm->srcu) || lockdep_is_held(&kvm->slots_lock)); } static inline struct kvm_memory_slot * id_to_memslot(struct kvm_memslots *slots, int id) { int index = slots->id_to_index[id]; struct kvm_memory_slot *slot; slot = &slots->memslots[index]; WARN_ON(slot->id != id); return slot; } #define HPA_MSB ((sizeof(hpa_t) * 8) - 1) #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB) static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; } extern struct page *bad_page; extern struct page *fault_page; extern pfn_t bad_pfn; extern pfn_t fault_pfn; int is_error_page(struct page *page); int is_error_pfn(pfn_t pfn); int is_hwpoison_pfn(pfn_t pfn); int is_fault_pfn(pfn_t pfn); int is_noslot_pfn(pfn_t pfn); int is_invalid_pfn(pfn_t pfn); int kvm_is_error_hva(unsigned long addr); int kvm_set_memory_region(struct kvm *kvm, struct kvm_userspace_memory_region *mem, int user_alloc); int __kvm_set_memory_region(struct kvm *kvm, struct kvm_userspace_memory_region *mem, int user_alloc); int kvm_arch_prepare_memory_region(struct kvm *kvm, struct kvm_memory_slot *memslot, struct kvm_memory_slot old, struct kvm_userspace_memory_region *mem, int user_alloc); void kvm_arch_commit_memory_region(struct kvm *kvm, struct kvm_userspace_memory_region *mem, struct kvm_memory_slot old, int user_alloc); void kvm_disable_largepages(void); void kvm_arch_flush_shadow(struct kvm *kvm); int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages, int nr_pages); struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); void kvm_release_page_clean(struct page *page); void kvm_release_page_dirty(struct page *page); void kvm_set_page_dirty(struct page *page); void kvm_set_page_accessed(struct page *page); pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr); pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn); pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async, bool write_fault, bool *writable); pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault, bool *writable); pfn_t gfn_to_pfn_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, gfn_t gfn); void kvm_release_pfn_dirty(pfn_t); void kvm_release_pfn_clean(pfn_t pfn); void kvm_set_pfn_dirty(pfn_t pfn); void kvm_set_pfn_accessed(pfn_t pfn); void kvm_get_pfn(pfn_t pfn); int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, int len); int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, void *data, unsigned long len); int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, int offset, int len); int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, unsigned long len); int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, void *data, unsigned long len); int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, gpa_t gpa); int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn); void mark_page_dirty(struct kvm *kvm, gfn_t gfn); void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot, gfn_t gfn); void kvm_vcpu_block(struct kvm_vcpu *vcpu); void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu); void kvm_resched(struct kvm_vcpu *vcpu); void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); void kvm_flush_remote_tlbs(struct kvm *kvm); void kvm_reload_remote_mmus(struct kvm *kvm); long kvm_arch_dev_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg); long kvm_arch_vcpu_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg); int kvm_dev_ioctl_check_extension(long ext); int kvm_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log, int *is_dirty); int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log); int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, struct kvm_userspace_memory_region *mem, int user_alloc); long kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg); int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, struct kvm_translation *tr); int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs); int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs); int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, struct kvm_mp_state *mp_state); int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, struct kvm_mp_state *mp_state); int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg); int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); int kvm_arch_init(void *opaque); void kvm_arch_exit(void); int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu); int kvm_arch_hardware_enable(void *garbage); void kvm_arch_hardware_disable(void *garbage); int kvm_arch_hardware_setup(void); void kvm_arch_hardware_unsetup(void); void kvm_arch_check_processor_compat(void *rtn); int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); void kvm_free_physmem(struct kvm *kvm); #ifndef __KVM_HAVE_ARCH_VM_ALLOC static inline struct kvm *kvm_arch_alloc_vm(void) { return kzalloc(sizeof(struct kvm), GFP_KERNEL); } static inline void kvm_arch_free_vm(struct kvm *kvm) { kfree(kvm); } #endif int kvm_arch_init_vm(struct kvm *kvm); void kvm_arch_destroy_vm(struct kvm *kvm); void kvm_free_all_assigned_devices(struct kvm *kvm); void kvm_arch_sync_events(struct kvm *kvm); int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); void kvm_vcpu_kick(struct kvm_vcpu *vcpu); int kvm_is_mmio_pfn(pfn_t pfn); struct kvm_irq_ack_notifier { struct hlist_node link; unsigned gsi; void (*irq_acked)(struct kvm_irq_ack_notifier *kian); }; struct kvm_assigned_dev_kernel { struct kvm_irq_ack_notifier ack_notifier; struct list_head list; int assigned_dev_id; int host_segnr; int host_busnr; int host_devfn; unsigned int entries_nr; int host_irq; bool host_irq_disabled; struct msix_entry *host_msix_entries; int guest_irq; struct msix_entry *guest_msix_entries; unsigned long irq_requested_type; int irq_source_id; int flags; struct pci_dev *dev; struct kvm *kvm; spinlock_t intx_lock; char irq_name[32]; struct pci_saved_state *pci_saved_state; }; struct kvm_irq_mask_notifier { void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked); int irq; struct hlist_node link; }; void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, struct kvm_irq_mask_notifier *kimn); void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, struct kvm_irq_mask_notifier *kimn); void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin, bool mask); #ifdef __KVM_HAVE_IOAPIC void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic, union kvm_ioapic_redirect_entry *entry, unsigned long *deliver_bitmask); #endif int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level); int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm, int irq_source_id, int level); void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin); void kvm_register_irq_ack_notifier(struct kvm *kvm, struct kvm_irq_ack_notifier *kian); void kvm_unregister_irq_ack_notifier(struct kvm *kvm, struct kvm_irq_ack_notifier *kian); int kvm_request_irq_source_id(struct kvm *kvm); void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id); /* For vcpu->arch.iommu_flags */ #define KVM_IOMMU_CACHE_COHERENCY 0x1 #ifdef CONFIG_IOMMU_API int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot); int kvm_iommu_map_guest(struct kvm *kvm); int kvm_iommu_unmap_guest(struct kvm *kvm); int kvm_assign_device(struct kvm *kvm, struct kvm_assigned_dev_kernel *assigned_dev); int kvm_deassign_device(struct kvm *kvm, struct kvm_assigned_dev_kernel *assigned_dev); #else /* CONFIG_IOMMU_API */ static inline int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot) { return 0; } static inline int kvm_iommu_map_guest(struct kvm *kvm) { return -ENODEV; } static inline int kvm_iommu_unmap_guest(struct kvm *kvm) { return 0; } static inline int kvm_assign_device(struct kvm *kvm, struct kvm_assigned_dev_kernel *assigned_dev) { return 0; } static inline int kvm_deassign_device(struct kvm *kvm, struct kvm_assigned_dev_kernel *assigned_dev) { return 0; } #endif /* CONFIG_IOMMU_API */ static inline void kvm_guest_enter(void) { BUG_ON(preemptible()); account_system_vtime(current); current->flags |= PF_VCPU; /* KVM does not hold any references to rcu protected data when it * switches CPU into a guest mode. In fact switching to a guest mode * is very similar to exiting to userspase from rcu point of view. In * addition CPU may stay in a guest mode for quite a long time (up to * one time slice). Lets treat guest mode as quiescent state, just like * we do with user-mode execution. */ rcu_virt_note_context_switch(smp_processor_id()); } static inline void kvm_guest_exit(void) { account_system_vtime(current); current->flags &= ~PF_VCPU; } static inline int memslot_id(struct kvm *kvm, gfn_t gfn) { return gfn_to_memslot(kvm, gfn)->id; } 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 gpa_t gfn_to_gpa(gfn_t gfn) { return (gpa_t)gfn << PAGE_SHIFT; } static inline gfn_t gpa_to_gfn(gpa_t gpa) { return (gfn_t)(gpa >> PAGE_SHIFT); } static inline hpa_t pfn_to_hpa(pfn_t pfn) { return (hpa_t)pfn << PAGE_SHIFT; } static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) { set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); } enum kvm_stat_kind { KVM_STAT_VM, KVM_STAT_VCPU, }; struct kvm_stats_debugfs_item { const char *name; int offset; enum kvm_stat_kind kind; struct dentry *dentry; }; extern struct kvm_stats_debugfs_item debugfs_entries[]; extern struct dentry *kvm_debugfs_dir; #ifdef KVM_ARCH_WANT_MMU_NOTIFIER static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq) { if (unlikely(vcpu->kvm->mmu_notifier_count)) return 1; /* * Both reads happen under the mmu_lock and both values are * modified under mmu_lock, so there's no need of smb_rmb() * here in between, otherwise mmu_notifier_count should be * read before mmu_notifier_seq, see * mmu_notifier_invalidate_range_end write side. */ if (vcpu->kvm->mmu_notifier_seq != mmu_seq) return 1; return 0; } #endif #ifdef CONFIG_HAVE_KVM_IRQCHIP #define KVM_MAX_IRQ_ROUTES 1024 int kvm_setup_default_irq_routing(struct kvm *kvm); int kvm_set_irq_routing(struct kvm *kvm, const struct kvm_irq_routing_entry *entries, unsigned nr, unsigned flags); void kvm_free_irq_routing(struct kvm *kvm); #else static inline void kvm_free_irq_routing(struct kvm *kvm) {} #endif #ifdef CONFIG_HAVE_KVM_EVENTFD void kvm_eventfd_init(struct kvm *kvm); int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags); void kvm_irqfd_release(struct kvm *kvm); void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *); int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args); #else static inline void kvm_eventfd_init(struct kvm *kvm) {} static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags) { return -EINVAL; } static inline void kvm_irqfd_release(struct kvm *kvm) {} #ifdef CONFIG_HAVE_KVM_IRQCHIP static inline void kvm_irq_routing_update(struct kvm *kvm, struct kvm_irq_routing_table *irq_rt) { rcu_assign_pointer(kvm->irq_routing, irq_rt); } #endif static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) { return -ENOSYS; } #endif /* CONFIG_HAVE_KVM_EVENTFD */ #ifdef CONFIG_KVM_APIC_ARCHITECTURE static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) { return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id; } #endif #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, unsigned long arg); #else static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, unsigned long arg) { return -ENOTTY; } #endif static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu) { set_bit(req, &vcpu->requests); } static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu) { if (test_bit(req, &vcpu->requests)) { clear_bit(req, &vcpu->requests); return true; } else { return false; } } #endif