[PATCH v3 1/2] arm64: smccc: add cache clean/invalidate IDs and return codes
From: Srirangan Madhavan <hidden>
Date: 2026-09-10 08:22:11
Also in:
linux-tegra, lkml
Subsystem:
secure monitor call(smc) calling convention (smccc), the rest · Maintainers:
Mark Rutland, Lorenzo Pieralisi, Sudeep Holla, Linus Torvalds
Define SMCCC Arch function IDs for CLEAN_INV_MEMREGION and its ATTRIBUTES call, and add RATE_LIMITED/BUSY return codes from DEN0028 for callers that need transient error handling. Signed-off-by: Srirangan Madhavan <redacted> Reviewed-by: Jonathan Cameron <jic23@kernel.org> --- include/linux/arm-smccc.h | 21 +++++++++++++++++++-- tools/include/linux/arm-smccc.h | 21 +++++++++++++++++++-- 2 files changed, 38 insertions(+), 4 deletions(-)
diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h
index 4de81848fe2e..2e205320d88a 100644
--- a/include/linux/arm-smccc.h
+++ b/include/linux/arm-smccc.h@@ -116,6 +116,22 @@ ARM_SMCCC_SMC_32, \ ARM_SMCCC_OWNER_CPU, 0x10) +/* + * DEN0028 v1.7 defines these cache maintenance functions as SMC64 + * because they carry 64-bit memory range arguments. + */ +#define ARM_SMCCC_ARCH_CLEAN_INV_MEMREGION \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_64, \ + ARM_SMCCC_OWNER_ARCH, \ + 0x5) + +#define ARM_SMCCC_ARCH_CLEAN_INV_MEMREGION_ATTRIBUTES \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_64, \ + ARM_SMCCC_OWNER_ARCH, \ + 0x6) + #define ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID \ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ ARM_SMCCC_SMC_32, \
@@ -305,13 +321,14 @@ 0x53) /* - * Return codes defined in ARM DEN 0070A - * ARM DEN 0070A is now merged/consolidated into ARM DEN 0028 C + * Return codes defined by Arm SMCCC (DEN0028 v1.7). */ #define SMCCC_RET_SUCCESS 0 #define SMCCC_RET_NOT_SUPPORTED -1 #define SMCCC_RET_NOT_REQUIRED -2 #define SMCCC_RET_INVALID_PARAMETER -3 +#define SMCCC_RET_RATE_LIMITED -4 +#define SMCCC_RET_BUSY -5 #ifndef __ASSEMBLY__
diff --git a/tools/include/linux/arm-smccc.h b/tools/include/linux/arm-smccc.h
index 63ce9bebccd3..ae5637b3240f 100644
--- a/tools/include/linux/arm-smccc.h
+++ b/tools/include/linux/arm-smccc.h@@ -96,6 +96,22 @@ ARM_SMCCC_SMC_32, \ 0, 0x3fff) +/* + * DEN0028 v1.7 defines these cache maintenance functions as SMC64 + * because they carry 64-bit memory range arguments. + */ +#define ARM_SMCCC_ARCH_CLEAN_INV_MEMREGION \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_64, \ + ARM_SMCCC_OWNER_ARCH, \ + 0x5) + +#define ARM_SMCCC_ARCH_CLEAN_INV_MEMREGION_ATTRIBUTES \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_64, \ + ARM_SMCCC_OWNER_ARCH, \ + 0x6) + #define ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID \ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ ARM_SMCCC_SMC_32, \
@@ -182,12 +198,13 @@ 0x53) /* - * Return codes defined in ARM DEN 0070A - * ARM DEN 0070A is now merged/consolidated into ARM DEN 0028 C + * Return codes defined by Arm SMCCC (DEN0028 v1.7). */ #define SMCCC_RET_SUCCESS 0 #define SMCCC_RET_NOT_SUPPORTED -1 #define SMCCC_RET_NOT_REQUIRED -2 #define SMCCC_RET_INVALID_PARAMETER -3 +#define SMCCC_RET_RATE_LIMITED -4 +#define SMCCC_RET_BUSY -5 #endif /*__LINUX_ARM_SMCCC_H*/
--
2.43.0