1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #ifndef __KVM_MM_H__
4 #define __KVM_MM_H__ 1
5
6 /*
7 * Architectures can choose whether to use an rwlock or spinlock
8 * for the mmu_lock. These macros, for use in common code
9 * only, avoids using #ifdefs in places that must deal with
10 * multiple architectures.
11 */
12
13 #ifdef KVM_HAVE_MMU_RWLOCK
14 #define KVM_MMU_LOCK_INIT(kvm) rwlock_init(&(kvm)->mmu_lock)
15 #define KVM_MMU_LOCK(kvm) write_lock(&(kvm)->mmu_lock)
16 #define KVM_MMU_UNLOCK(kvm) write_unlock(&(kvm)->mmu_lock)
17 #else
18 #define KVM_MMU_LOCK_INIT(kvm) spin_lock_init(&(kvm)->mmu_lock)
19 #define KVM_MMU_LOCK(kvm) spin_lock(&(kvm)->mmu_lock)
20 #define KVM_MMU_UNLOCK(kvm) spin_unlock(&(kvm)->mmu_lock)
21 #endif /* KVM_HAVE_MMU_RWLOCK */
22
23 kvm_pfn_t hva_to_pfn(unsigned long addr, bool atomic, bool interruptible,
24 bool *async, bool write_fault, bool *writable);
25
26 #ifdef CONFIG_HAVE_KVM_PFNCACHE
27 void gfn_to_pfn_cache_invalidate_start(struct kvm *kvm,
28 unsigned long start,
29 unsigned long end);
30 #else
31 static inline void gfn_to_pfn_cache_invalidate_start(struct kvm *kvm,
32 unsigned long start,
33 unsigned long end)
34 {
35 }
36 #endif /* HAVE_KVM_PFNCACHE */
37
38 #ifdef CONFIG_KVM_PRIVATE_MEM
39 void kvm_gmem_init(struct module *module);
40 int kvm_gmem_create(struct kvm *kvm, struct kvm_create_guest_memfd *args);
41 int kvm_gmem_bind(struct kvm *kvm, struct kvm_memory_slot *slot,
42 unsigned int fd, loff_t offset);
43 void kvm_gmem_unbind(struct kvm_memory_slot *slot);
44 #else
45 static inline void kvm_gmem_init(struct module *module)
46 {
47
48 }
49
50 static inline int kvm_gmem_bind(struct kvm *kvm,
51 struct kvm_memory_slot *slot,
52 unsigned int fd, loff_t offset)
53 {
54 WARN_ON_ONCE(1);
55 return -EIO;
56 }
57
58 static inline void kvm_gmem_unbind(struct kvm_memory_slot *slot)
59 {
60 WARN_ON_ONCE(1);
61 }
62 #endif /* CONFIG_KVM_PRIVATE_MEM */
63
64 #endif /* __KVM_MM_H__ */
65
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