[PATCH v2 1/2] arm64: smccc: add cache clean/invalidate IDs and return codes

[Srirangan Madhavan]

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 at nvidia.com>
Reviewed-by: Jonathan Cameron <jic23 at 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 50b47eba7d01..8cba040e0816 100644
--- a/include/linux/arm-smccc.h
+++ b/include/linux/arm-smccc.h
@@ -105,6 +105,22 @@
 			   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,				\
@@ -294,13 +310,14 @@
 			   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