From: Srirangan Madhavan <smadhavan@nvidia.com>
To: mark.rutland@arm.com, lpieralisi@kernel.org,
sudeep.holla@kernel.org, conor@kernel.org, jic23@kernel.org
Cc: catalin.marinas@arm.com, will@kernel.org, treding@nvidia.com,
jonathanh@nvidia.com, bence.csokas@arm.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org,
Srirangan Madhavan <smadhavan@nvidia.com>
Subject: [PATCH v3 1/2] arm64: smccc: add cache clean/invalidate IDs and return codes
Date: Thu, 10 Sep 2026 08:21:41 +0000 [thread overview]
Message-ID: <20260910082142.1522865-2-smadhavan@nvidia.com> (raw)
In-Reply-To: <20260910082142.1522865-1-smadhavan@nvidia.com>
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 <smadhavan@nvidia.com>
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
next prev parent reply other threads:[~2026-09-10 8:22 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-10 8:21 [PATCH v3 0/2] Add SMCCC cache clean/invalidate provider Srirangan Madhavan
2026-09-10 8:21 ` Srirangan Madhavan [this message]
2026-09-10 8:21 ` [PATCH v3 2/2] cache: add SMCCC-backed cache invalidate provider Srirangan Madhavan
2026-09-10 18:52 ` Jonathan Cameron
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