1 files changed, 34 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/por.h b/arch/arm64/include/asm/por.h
new file mode 100644
index 000000000000..d913d5b529e4
--- /dev/null
+++ b/arch/arm64/include/asm/por.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2023 Arm Ltd.
+ */
+
+#ifndef _ASM_ARM64_POR_H
+#define _ASM_ARM64_POR_H
+
+#include <asm/sysreg.h>
+
+#define POR_EL0_INIT	POR_ELx_PERM_PREP(0, POE_RWX)
+
+static inline bool por_elx_allows_read(u64 por, u8 pkey)
+{
+	u8 perm = POR_ELx_PERM_GET(pkey, por);
+
+	return perm & POE_R;
+}
+
+static inline bool por_elx_allows_write(u64 por, u8 pkey)
+{
+	u8 perm = POR_ELx_PERM_GET(pkey, por);
+
+	return perm & POE_W;
+}
+
+static inline bool por_elx_allows_exec(u64 por, u8 pkey)
+{
+	u8 perm = POR_ELx_PERM_GET(pkey, por);
+
+	return perm & POE_X;
+}
+
+#endif /* _ASM_ARM64_POR_H */