[PATCH v2 06/39] xen/riscv: introduce fence.h

[Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>]

Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
---
Changes in V2:
 - Nothing changed. Only rebase.
---
 xen/arch/riscv/include/asm/fence.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 xen/arch/riscv/include/asm/fence.h

diff --git a/xen/arch/riscv/include/asm/fence.h 
b/xen/arch/riscv/include/asm/fence.h
new file mode 100644
index 0000000000..2b443a3a48
--- /dev/null
+++ b/xen/arch/riscv/include/asm/fence.h
@@ -0,0 +1,12 @@
+#ifndef _ASM_RISCV_FENCE_H
+#define _ASM_RISCV_FENCE_H
+
+#ifdef CONFIG_SMP
+#define RISCV_ACQUIRE_BARRIER          "\tfence r , rw\n"
+#define RISCV_RELEASE_BARRIER          "\tfence rw,  w\n"
+#else
+#define RISCV_ACQUIRE_BARRIER
+#define RISCV_RELEASE_BARRIER
+#endif
+
+#endif /* _ASM_RISCV_FENCE_H */
-- 
2.42.0