diff options
Diffstat (limited to 'include/linux/kvm_types.h')
| -rw-r--r-- | include/linux/kvm_types.h | 68 |
1 files changed, 66 insertions, 2 deletions
diff --git a/include/linux/kvm_types.h b/include/linux/kvm_types.h index 68e84cf42a3f..3ca3db020e0e 100644 --- a/include/linux/kvm_types.h +++ b/include/linux/kvm_types.h @@ -18,7 +18,12 @@ struct kvm_memslots; enum kvm_mr_change; +#include <linux/bits.h> +#include <linux/mutex.h> #include <linux/types.h> +#include <linux/spinlock_types.h> + +#include <asm/kvm_types.h> /* * Address types: @@ -43,6 +48,12 @@ typedef u64 hfn_t; typedef hfn_t kvm_pfn_t; +enum pfn_cache_usage { + KVM_GUEST_USES_PFN = BIT(0), + KVM_HOST_USES_PFN = BIT(1), + KVM_GUEST_AND_HOST_USE_PFN = KVM_GUEST_USES_PFN | KVM_HOST_USES_PFN, +}; + struct gfn_to_hva_cache { u64 generation; gpa_t gpa; @@ -53,9 +64,62 @@ struct gfn_to_hva_cache { struct gfn_to_pfn_cache { u64 generation; - gfn_t gfn; + gpa_t gpa; + unsigned long uhva; + struct kvm_memory_slot *memslot; + struct kvm_vcpu *vcpu; + struct list_head list; + rwlock_t lock; + struct mutex refresh_lock; + void *khva; kvm_pfn_t pfn; - bool dirty; + enum pfn_cache_usage usage; + bool active; + bool valid; +}; + +#ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE +/* + * Memory caches are used to preallocate memory ahead of various MMU flows, + * e.g. page fault handlers. Gracefully handling allocation failures deep in + * MMU flows is problematic, as is triggering reclaim, I/O, etc... while + * holding MMU locks. Note, these caches act more like prefetch buffers than + * classical caches, i.e. objects are not returned to the cache on being freed. + * + * The @capacity field and @objects array are lazily initialized when the cache + * is topped up (__kvm_mmu_topup_memory_cache()). + */ +struct kvm_mmu_memory_cache { + int nobjs; + gfp_t gfp_zero; + gfp_t gfp_custom; + struct kmem_cache *kmem_cache; + int capacity; + void **objects; +}; +#endif + +#define HALT_POLL_HIST_COUNT 32 + +struct kvm_vm_stat_generic { + u64 remote_tlb_flush; + u64 remote_tlb_flush_requests; +}; + +struct kvm_vcpu_stat_generic { + u64 halt_successful_poll; + u64 halt_attempted_poll; + u64 halt_poll_invalid; + u64 halt_wakeup; + u64 halt_poll_success_ns; + u64 halt_poll_fail_ns; + u64 halt_wait_ns; + u64 halt_poll_success_hist[HALT_POLL_HIST_COUNT]; + u64 halt_poll_fail_hist[HALT_POLL_HIST_COUNT]; + u64 halt_wait_hist[HALT_POLL_HIST_COUNT]; + u64 blocking; }; +#define KVM_STATS_NAME_SIZE 48 + #endif /* __KVM_TYPES_H__ */ |