diff --git a/include/linux/cc_platform.h b/include/linux/cc_platform.h
index efd8205..d06bc7a 100644
--- a/include/linux/cc_platform.h
+++ b/include/linux/cc_platform.h

@@ -72,6 +72,19 @@ enum cc_attr {

         * Examples include TDX guest & SEV.
         */
        CC_ATTR_GUEST_UNROLL_STRING_IO,
+
+       /**
+        * @CC_ATTR_GUEST_MEM_ACCESS_RESTRICTED: Restricted memory access to
+        *                                       Guest memory is active
+        *
+        * The platform/OS is running as a guest/virtual machine and uses
+        * the restricted access to its memory. This attribute is set if
either
+        * Guest memory encryption or restricted memory access using Xen
grant
+        * mappings is active.
+        *
+        * Examples include Xen guest and SEV.