hv: multi-arch construct barrier library

extract common barrier interface to include/lib/barrier.h,
and invoke the variant implementation of arch.

Tracked-On: #8803
Signed-off-by: Haoyu Tang <haoyu.tang@intel.com>
Reviewed-by: Yifan Liu  <yifan1.liu@intel.com>
Acked-by: Wang, Yu1 <yu1.wang@intel.com>

hypervisor/include/lib/barrier.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2025 Intel Corporation.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef BARRIER_H
+#define BARRIER_H
+
+#include <types.h>
+#include <asm/lib/barrier.h>
+
+/* The mandatory functions should be implemented by arch barrier library */
+static inline void arch_cpu_read_memory_barrier(void);
+static inline void arch_cpu_write_memory_barrier(void);
+static inline void arch_cpu_memory_barrier(void);
+
+/* The common functions map to arch implementation */
+/* Synchronizes all write accesses to memory */
+static inline void cpu_write_memory_barrier(void)
+{
+        return arch_cpu_write_memory_barrier();
+}
+/* Synchronizes all read accesses from memory */
+static inline void cpu_read_memory_barrier(void)
+{
+        return arch_cpu_read_memory_barrier();
+}
+/* Synchronizes all read and write accesses to/from memory */
+static inline void cpu_memory_barrier(void)
+{
+        return arch_cpu_memory_barrier();
+}
+
+/* Prevents compilers from reordering read/write access across this barrier */
+static inline void cpu_compiler_barrier(void)
+{
+        asm volatile ("" : : : "memory");
+}
+#endif /* BARRIER_H */