virt/kvm/kvm_mm.h

   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 #define KVM_MMU_READ_LOCK(kvm)          read_lock(&(kvm)->mmu_lock)
  18 #define KVM_MMU_READ_UNLOCK(kvm)        read_unlock(&(kvm)->mmu_lock)
  19 #else
  20 #define KVM_MMU_LOCK_INIT(kvm)          spin_lock_init(&(kvm)->mmu_lock)
  21 #define KVM_MMU_LOCK(kvm)               spin_lock(&(kvm)->mmu_lock)
  22 #define KVM_MMU_UNLOCK(kvm)             spin_unlock(&(kvm)->mmu_lock)
  23 #define KVM_MMU_READ_LOCK(kvm)          spin_lock(&(kvm)->mmu_lock)
  24 #define KVM_MMU_READ_UNLOCK(kvm)        spin_unlock(&(kvm)->mmu_lock)
  25 #endif /* KVM_HAVE_MMU_RWLOCK */
  26
  27 kvm_pfn_t hva_to_pfn(unsigned long addr, bool atomic, bool *async,
  28                      bool write_fault, bool *writable);
  29
  30 #ifdef CONFIG_HAVE_KVM_PFNCACHE
  31 void gfn_to_pfn_cache_invalidate_start(struct kvm *kvm,
  32                                        unsigned long start,
  33                                        unsigned long end,
  34                                        bool may_block);
  35 #else
  36 static inline void gfn_to_pfn_cache_invalidate_start(struct kvm *kvm,
  37                                                      unsigned long start,
  38                                                      unsigned long end,
  39                                                      bool may_block)
  40 {
  41 }
  42 #endif /* HAVE_KVM_PFNCACHE */
  43
  44 #endif /* __KVM_MM_H__ */