xref: /openbmc/linux/virt/kvm/kvm_mm.h (revision e2ad626f)
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 				       bool may_block);
31 #else
32 static inline void gfn_to_pfn_cache_invalidate_start(struct kvm *kvm,
33 						     unsigned long start,
34 						     unsigned long end,
35 						     bool may_block)
36 {
37 }
38 #endif /* HAVE_KVM_PFNCACHE */
39 
40 #endif /* __KVM_MM_H__ */
41