x86: add readq()

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Tested-by: Stefan Berger <stefanb@linux.vnet.ibm.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/x86.h b/src/x86.h
index 4aea65cd..c7bb60df 100644
--- a/src/x86.h
+++ b/src/x86.h
@@ -211,6 +211,11 @@ static inline void writeb(void *addr, u8 val) {
     barrier();
     *(volatile u8 *)addr = val;
 }
+static inline u64 readq(const void *addr) {
+    u64 val = *(volatile const u64 *)addr;
+    barrier();
+    return val;
+}
 static inline u32 readl(const void *addr) {
     u32 val = *(volatile const u32 *)addr;
     barrier();