[linux-block.git] / include / linux / kvm_types.h

/* SPDX-License-Identifier: GPL-2.0-only */

#ifndef __KVM_TYPES_H__
#define __KVM_TYPES_H__

struct kvm;
struct kvm_async_pf;
struct kvm_device_ops;
struct kvm_interrupt;
struct kvm_irq_routing_table;
struct kvm_memory_slot;
struct kvm_one_reg;
struct kvm_run;
struct kvm_userspace_memory_region;
struct kvm_vcpu;
struct kvm_vcpu_init;
struct kvm_memslots;

enum kvm_mr_change;

#include <linux/types.h>
#include <linux/spinlock_types.h>

#include <asm/kvm_types.h>

/*
 * Address types:
 *
 *  gva - guest virtual address
 *  gpa - guest physical address
 *  gfn - guest frame number
 *  hva - host virtual address
 *  hpa - host physical address
 *  hfn - host frame number
 */

typedef unsigned long  gva_t;
typedef u64            gpa_t;
typedef u64            gfn_t;

#define GPA_INVALID	(~(gpa_t)0)

typedef unsigned long  hva_t;
typedef u64            hpa_t;
typedef u64            hfn_t;

typedef hfn_t kvm_pfn_t;

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_vcpu *vcpu;
	struct list_head list;
	rwlock_t lock;
	void *khva;
	kvm_pfn_t pfn;
	bool active;
	bool valid;
	bool dirty;
	bool kernel_map;
	bool guest_uses_pa;
};

#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.
 */
struct kvm_mmu_memory_cache {
	int nobjs;
	gfp_t gfp_zero;
	struct kmem_cache *kmem_cache;
	void *objects[KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE];
};
#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__ */
Commit	Line	Data
cd93f165	1	/* SPDX-License-Identifier: GPL-2.0-only */
d77a39d9 HB	2
	3	#ifndef __KVM_TYPES_H__
	4	#define __KVM_TYPES_H__
	5
65647300 PB	6	struct kvm;
	7	struct kvm_async_pf;
	8	struct kvm_device_ops;
	9	struct kvm_interrupt;
	10	struct kvm_irq_routing_table;
	11	struct kvm_memory_slot;
	12	struct kvm_one_reg;
	13	struct kvm_run;
	14	struct kvm_userspace_memory_region;
	15	struct kvm_vcpu;
	16	struct kvm_vcpu_init;
15f46015	17	struct kvm_memslots;
65647300 PB	18
	19	enum kvm_mr_change;
	20
91724814	21	#include <linux/types.h>
982ed0de	22	#include <linux/spinlock_types.h>
d77a39d9	23
2aa9c199 SC	24	#include <asm/kvm_types.h>
2aa9c199 SC	25
d77a39d9 HB	26	/*
	27	* Address types:
	28	*
	29	* gva - guest virtual address
	30	* gpa - guest physical address
	31	* gfn - guest frame number
	32	* hva - host virtual address
	33	* hpa - host physical address
	34	* hfn - host frame number
	35	*/
	36
	37	typedef unsigned long gva_t;
	38	typedef u64 gpa_t;
5689cc53	39	typedef u64 gfn_t;
d77a39d9	40
8564d637 SP	41	#define GPA_INVALID (~(gpa_t)0)
8564d637 SP	42
d77a39d9 HB	43	typedef unsigned long hva_t;
d77a39d9 HB	44	typedef u64 hpa_t;
5689cc53	45	typedef u64 hfn_t;
d77a39d9	46
ba049e93	47	typedef hfn_t kvm_pfn_t;
35149e21	48
49c7754c GN	49	struct gfn_to_hva_cache {
	50	u64 generation;
	51	gpa_t gpa;
	52	unsigned long hva;
8f964525	53	unsigned long len;
49c7754c GN	54	struct kvm_memory_slot *memslot;
	55	};
	56
982ed0de DW	57	struct gfn_to_pfn_cache {
	58	u64 generation;
	59	gpa_t gpa;
	60	unsigned long uhva;
	61	struct kvm_memory_slot *memslot;
	62	struct kvm_vcpu *vcpu;
	63	struct list_head list;
	64	rwlock_t lock;
	65	void *khva;
	66	kvm_pfn_t pfn;
	67	bool active;
	68	bool valid;
	69	bool dirty;
	70	bool kernel_map;
	71	bool guest_uses_pa;
	72	};
	73
2aa9c199 SC	74	#ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE
	75	/*
	76	* Memory caches are used to preallocate memory ahead of various MMU flows,
	77	* e.g. page fault handlers. Gracefully handling allocation failures deep in
	78	* MMU flows is problematic, as is triggering reclaim, I/O, etc... while
	79	* holding MMU locks. Note, these caches act more like prefetch buffers than
	80	* classical caches, i.e. objects are not returned to the cache on being freed.
	81	*/
	82	struct kvm_mmu_memory_cache {
	83	int nobjs;
	84	gfp_t gfp_zero;
	85	struct kmem_cache *kmem_cache;
	86	void *objects[KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE];
	87	};
	88	#endif
	89
8ccba534 JZ	90	#define HALT_POLL_HIST_COUNT 32
8ccba534 JZ	91
0193cc90 JZ	92	struct kvm_vm_stat_generic {
0193cc90 JZ	93	u64 remote_tlb_flush;
3cc4e148	94	u64 remote_tlb_flush_requests;
0193cc90 JZ	95	};
	96
	97	struct kvm_vcpu_stat_generic {
	98	u64 halt_successful_poll;
	99	u64 halt_attempted_poll;
	100	u64 halt_poll_invalid;
	101	u64 halt_wakeup;
	102	u64 halt_poll_success_ns;
	103	u64 halt_poll_fail_ns;
87bcc5fa	104	u64 halt_wait_ns;
8ccba534 JZ	105	u64 halt_poll_success_hist[HALT_POLL_HIST_COUNT];
	106	u64 halt_poll_fail_hist[HALT_POLL_HIST_COUNT];
	107	u64 halt_wait_hist[HALT_POLL_HIST_COUNT];
c3858335	108	u64 blocking;
0193cc90	109	};
2aa9c199	110
cb082bfa JZ	111	#define KVM_STATS_NAME_SIZE 48
cb082bfa JZ	112
d77a39d9	113	#endif /* __KVM_TYPES_H__ */