diff options
Diffstat (limited to 'virt/kvm/mmu_lock.h')
| -rw-r--r-- | virt/kvm/mmu_lock.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/virt/kvm/mmu_lock.h b/virt/kvm/mmu_lock.h new file mode 100644 index 000000000000..9e1308f9734c --- /dev/null +++ b/virt/kvm/mmu_lock.h @@ -0,0 +1,23 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#ifndef KVM_MMU_LOCK_H +#define KVM_MMU_LOCK_H 1 + +/* + * Architectures can choose whether to use an rwlock or spinlock + * for the mmu_lock. These macros, for use in common code + * only, avoids using #ifdefs in places that must deal with + * multiple architectures. + */ + +#ifdef KVM_HAVE_MMU_RWLOCK +#define KVM_MMU_LOCK_INIT(kvm) rwlock_init(&(kvm)->mmu_lock) +#define KVM_MMU_LOCK(kvm) write_lock(&(kvm)->mmu_lock) +#define KVM_MMU_UNLOCK(kvm) write_unlock(&(kvm)->mmu_lock) +#else +#define KVM_MMU_LOCK_INIT(kvm) spin_lock_init(&(kvm)->mmu_lock) +#define KVM_MMU_LOCK(kvm) spin_lock(&(kvm)->mmu_lock) +#define KVM_MMU_UNLOCK(kvm) spin_unlock(&(kvm)->mmu_lock) +#endif /* KVM_HAVE_MMU_RWLOCK */ + +#endif |