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