| #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/preempt.h> |
| #include <linux/msi.h> |
| #include <asm/signal.h> |
| |
| #include <linux/kvm.h> |
| #include <linux/kvm_para.h> |
| |
| #include <linux/kvm_types.h> |
| |
| #include <asm/kvm_host.h> |
| |
| /* |
| * 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_KVMCLOCK_UPDATE 8 |
| #define KVM_REQ_KICK 9 |
| |
| #define KVM_USERSPACE_IRQ_SOURCE_ID 0 |
| |
| struct kvm; |
| struct kvm_vcpu; |
| extern struct kmem_cache *kvm_vcpu_cache; |
| |
| /* |
| * It would be nice to use something smarter than a linear search, TBD... |
| * Thankfully we dont expect many devices to register (famous last words :), |
| * so until then it will suffice. At least its abstracted so we can change |
| * in one place. |
| */ |
| struct kvm_io_bus { |
| int dev_count; |
| #define NR_IOBUS_DEVS 6 |
| struct kvm_io_device *devs[NR_IOBUS_DEVS]; |
| }; |
| |
| void kvm_io_bus_init(struct kvm_io_bus *bus); |
| void kvm_io_bus_destroy(struct kvm_io_bus *bus); |
| int kvm_io_bus_write(struct kvm_io_bus *bus, gpa_t addr, int len, |
| const void *val); |
| int kvm_io_bus_read(struct kvm_io_bus *bus, gpa_t addr, int len, |
| void *val); |
| int __kvm_io_bus_register_dev(struct kvm_io_bus *bus, |
| struct kvm_io_device *dev); |
| int kvm_io_bus_register_dev(struct kvm *kvm, struct kvm_io_bus *bus, |
| struct kvm_io_device *dev); |
| void __kvm_io_bus_unregister_dev(struct kvm_io_bus *bus, |
| struct kvm_io_device *dev); |
| void kvm_io_bus_unregister_dev(struct kvm *kvm, struct kvm_io_bus *bus, |
| struct kvm_io_device *dev); |
| |
| struct kvm_vcpu { |
| struct kvm *kvm; |
| #ifdef CONFIG_PREEMPT_NOTIFIERS |
| struct preempt_notifier preempt_notifier; |
| #endif |
| int vcpu_id; |
| struct mutex mutex; |
| int cpu; |
| struct kvm_run *run; |
| unsigned long requests; |
| unsigned long guest_debug; |
| int fpu_active; |
| int guest_fpu_loaded; |
| wait_queue_head_t wq; |
| 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; |
| unsigned char mmio_data[8]; |
| gpa_t mmio_phys_addr; |
| #endif |
| |
| struct kvm_vcpu_arch arch; |
| }; |
| |
| struct kvm_memory_slot { |
| gfn_t base_gfn; |
| unsigned long npages; |
| unsigned long flags; |
| unsigned long *rmap; |
| unsigned long *dirty_bitmap; |
| struct { |
| unsigned long rmap_pde; |
| int write_count; |
| } *lpage_info[KVM_NR_PAGE_SIZES - 1]; |
| unsigned long userspace_addr; |
| int user_alloc; |
| }; |
| |
| 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 |
| |
| struct kvm { |
| spinlock_t mmu_lock; |
| spinlock_t requests_lock; |
| struct rw_semaphore slots_lock; |
| struct mm_struct *mm; /* userspace tied to this vm */ |
| int nmemslots; |
| struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS + |
| KVM_PRIVATE_MEM_SLOTS]; |
| #ifdef CONFIG_KVM_APIC_ARCHITECTURE |
| u32 bsp_vcpu_id; |
| struct kvm_vcpu *bsp_vcpu; |
| #endif |
| struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; |
| atomic_t online_vcpus; |
| struct list_head vm_list; |
| struct mutex lock; |
| struct kvm_io_bus mmio_bus; |
| struct kvm_io_bus pio_bus; |
| #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_dev *coalesced_mmio_dev; |
| struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; |
| #endif |
| |
| struct mutex irq_lock; |
| #ifdef CONFIG_HAVE_KVM_IRQCHIP |
| struct kvm_irq_routing_table *irq_routing; |
| struct hlist_head mask_notifier_list; |
| #endif |
| |
| #ifdef KVM_ARCH_WANT_MMU_NOTIFIER |
| struct mmu_notifier mmu_notifier; |
| unsigned long mmu_notifier_seq; |
| long mmu_notifier_count; |
| #endif |
| }; |
| |
| /* The guest did something we don't support. */ |
| #define pr_unimpl(vcpu, fmt, ...) \ |
| do { \ |
| if (printk_ratelimit()) \ |
| printk(KERN_ERR "kvm: %i: cpu%i " fmt, \ |
| current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \ |
| } while (0) |
| |
| #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, vcpup = kvm_get_vcpu(kvm, idx); \ |
| idx < atomic_read(&kvm->online_vcpus) && vcpup; \ |
| vcpup = kvm_get_vcpu(kvm, ++idx)) |
| |
| 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 int vcpu_size, |
| struct module *module); |
| void kvm_exit(void); |
| |
| void kvm_get_kvm(struct kvm *kvm); |
| void kvm_put_kvm(struct kvm *kvm); |
| |
| #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; } |
| struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva); |
| |
| extern struct page *bad_page; |
| extern pfn_t bad_pfn; |
| |
| int is_error_page(struct page *page); |
| int is_error_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_set_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); |
| gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn); |
| 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 gfn_to_pfn(struct kvm *kvm, 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_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_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); |
| void mark_page_dirty(struct kvm *kvm, gfn_t gfn); |
| |
| void kvm_vcpu_block(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); |
| void 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); |
| |
| struct kvm *kvm_arch_create_vm(void); |
| 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); |
| }; |
| |
| #define KVM_ASSIGNED_MSIX_PENDING 0x1 |
| struct kvm_guest_msix_entry { |
| u32 vector; |
| u16 entry; |
| u16 flags; |
| }; |
| |
| struct kvm_assigned_dev_kernel { |
| struct kvm_irq_ack_notifier ack_notifier; |
| struct work_struct interrupt_work; |
| struct list_head list; |
| int assigned_dev_id; |
| 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 kvm_guest_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 assigned_dev_lock; |
| }; |
| |
| 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, int irq, 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); |
| 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, gfn_t base_gfn, |
| unsigned long npages); |
| 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, |
| gfn_t base_gfn, |
| unsigned long npages) |
| { |
| 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) |
| { |
| account_system_vtime(current); |
| current->flags |= PF_VCPU; |
| } |
| |
| static inline void kvm_guest_exit(void) |
| { |
| account_system_vtime(current); |
| current->flags &= ~PF_VCPU; |
| } |
| |
| static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot) |
| { |
| return slot - kvm->memslots; |
| } |
| |
| static inline gpa_t gfn_to_gpa(gfn_t gfn) |
| { |
| return (gpa_t)gfn << 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); |
| 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) {} |
| 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 |
| #endif |