HVM-538 Implement smp_rmb/smp_wmb in kvm

1 files changed, 8 insertions, 0 deletions

diff --git a/kvm_x86.h b/kvm_x86.h
index af6a38b..bbe2daf 100644
--- a/kvm_x86.h
+++ b/kvm_x86.h
@@ -274,4 +274,12 @@ typedef struct kvm_vcpu_events {
 	0;				\
 	})
 
+/*
+ * The following should provide an optimization barrier.
+ * If the system does reorder loads and stores, this needs to be changed.
+ */
+
+#define	smp_wmb()   __asm__ __volatile__("" ::: "memory")
+#define	smp_rmb()   __asm__ __volatile__("" ::: "memory")
+
 #endif /* __KVM_X86_H */