include/linux/kvm_types.h

Source file repositories/reference/linux-study-clean/include/linux/kvm_types.h

File Facts

System
Linux kernel
Corpus path
include/linux/kvm_types.h
Extension
.h
Size
3532 bytes
Lines
146
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct gfn_to_hva_cache {
	u64 generation;
	gpa_t gpa;
	unsigned long hva;
	unsigned long len;
	struct kvm_memory_slot *memslot;
};

struct gfn_to_pfn_cache {
	u64 generation;
	gpa_t gpa;
	unsigned long uhva;
	struct kvm_memory_slot *memslot;
	struct kvm *kvm;
	struct list_head list;
	rwlock_t lock;
	struct mutex refresh_lock;
	void *khva;
	kvm_pfn_t pfn;
	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 {
	gfp_t gfp_zero;
	gfp_t gfp_custom;
	u64 init_value;
	struct kmem_cache *kmem_cache;
	int capacity;
	int nobjs;
	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 /* !__ASSEMBLER__ */

#endif /* __KVM_TYPES_H__ */

Annotation

Implementation Notes