diff mbox series

[RFC,1/7] firmware: smccc: Add macros for Trusted OS/App owner check on SMC value

Message ID 20250401170527.344092-2-yuvraj.kernel@gmail.com (mailing list archive)
State New
Headers show
Series KVM: optee: Introduce OP-TEE Mediator for exposing secure world to KVM guests | expand

Commit Message

Yuvraj Sakshith April 1, 2025, 5:05 p.m. UTC 
This patch adds ARM_SMCCC_IS_OWNER_TRUSTED_APP() and ARM_SMCCC_IS_OWNER_TRUSTED_OS()
macros. These can be used to identify if the SMC is targetted at a Trusted OS/App in
the secure world.

Signed-off-by: Yuvraj Sakshith <yuvraj.kernel@gmail.com>
---
 include/linux/arm-smccc.h | 8 ++++++++
 1 file changed, 8 insertions(+)
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Patch

diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h
index f19be5754090..da2b4565d5b3 100644
--- a/include/linux/arm-smccc.h
+++ b/include/linux/arm-smccc.h
@@ -56,6 +56,14 @@ 
 #define ARM_SMCCC_OWNER_TRUSTED_OS	50
 #define ARM_SMCCC_OWNER_TRUSTED_OS_END	63
 
+#define ARM_SMCCC_IS_OWNER_TRUSTED_APP(smc_val) \
+		((ARM_SMCCC_OWNER_NUM(smc_val) >= ARM_SMCCC_OWNER_TRUSTED_APP) && \
+			(ARM_SMCCC_OWNER_NUM(smc_val) <= ARM_SMCCC_OWNER_TRUSTED_APP_END))
+
+#define ARM_SMCCC_IS_OWNER_TRUSTED_OS(smc_val)  \
+		((ARM_SMCCC_OWNER_NUM(smc_val) >= ARM_SMCCC_OWNER_TRUSTED_OS) && \
+			(ARM_SMCCC_OWNER_NUM(smc_val) <= ARM_SMCCC_OWNER_TRUSTED_OS_END))
+
 #define ARM_SMCCC_FUNC_QUERY_CALL_UID  0xff01
 
 #define ARM_SMCCC_QUIRK_NONE		0