[PATCH v2 2/3] arm64: rsi: Add realm hash algorithm defines

From: Yeoreum Yun

Date: Tue Sep 29 2026 - 12:59:14 EST


From: Sami Mujawar <sami.mujawar@xxxxxxx>

Add macro definitions for the hash algorithm identifiers, as
specified in the Realm Management Monitor (RMM) specification.

Signed-off-by: Sami Mujawar <sami.mujawar@xxxxxxx>
---
include/linux/arm-smccc-rsi.h | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/include/linux/arm-smccc-rsi.h b/include/linux/arm-smccc-rsi.h
index fddb77986f70..a83df2655808 100644
--- a/include/linux/arm-smccc-rsi.h
+++ b/include/linux/arm-smccc-rsi.h
@@ -144,6 +144,13 @@ struct realm_config {

#endif /* __ASSEMBLER__ */

+/*
+ * The RSI definition of the Hash Algorithm (as specified by the Secure
+ * Hash Standard) returned in the realm_config data structure.
+ */
+#define RSI_HASH_SHA_256 0
+#define RSI_HASH_SHA_512 1
+
/*
* Read configuration for the current Realm.
*

--
2.43.0