[PATCH v2 1/4] uapi: riscv: hwprobe: Add Zicbop extension bit and block-size key

[Yao Zihong]

Introduce RISCV_HWPROBE_EXT_ZICBOP to report presence of the Zicbop
extension through hwprobe, and add RISCV_HWPROBE_KEY_ZICBOP_BLOCK_SIZE
to expose the block size (in bytes) when Zicbop is supported.

Signed-off-by: Yao Zihong <zihong.plct@xxxxxxxxxxxxxxxx>
---
 arch/riscv/include/asm/hwprobe.h      | 2 +-
 arch/riscv/include/uapi/asm/hwprobe.h | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/include/asm/hwprobe.h b/arch/riscv/include/asm/hwprobe.h
index 948d2b34e94e..2f278c395af9 100644
--- a/arch/riscv/include/asm/hwprobe.h
+++ b/arch/riscv/include/asm/hwprobe.h
@@ -8,7 +8,7 @@
 
 #include <uapi/asm/hwprobe.h>
 
-#define RISCV_HWPROBE_MAX_KEY 14
+#define RISCV_HWPROBE_MAX_KEY 15
 
 static inline bool riscv_hwprobe_key_is_valid(__s64 key)
 {
diff --git a/arch/riscv/include/uapi/asm/hwprobe.h b/arch/riscv/include/uapi/asm/hwprobe.h
index 5d30a4fae37a..9cc508be54c5 100644
--- a/arch/riscv/include/uapi/asm/hwprobe.h
+++ b/arch/riscv/include/uapi/asm/hwprobe.h
@@ -82,6 +82,7 @@ struct riscv_hwprobe {
 #define		RISCV_HWPROBE_EXT_ZAAMO		(1ULL << 56)
 #define		RISCV_HWPROBE_EXT_ZALRSC	(1ULL << 57)
 #define		RISCV_HWPROBE_EXT_ZABHA		(1ULL << 58)
+#define		RISCV_HWPROBE_EXT_ZICBOP	(1ULL << 59)
 #define RISCV_HWPROBE_KEY_CPUPERF_0	5
 #define		RISCV_HWPROBE_MISALIGNED_UNKNOWN	(0 << 0)
 #define		RISCV_HWPROBE_MISALIGNED_EMULATED	(1 << 0)
@@ -107,6 +108,7 @@ struct riscv_hwprobe {
 #define RISCV_HWPROBE_KEY_ZICBOM_BLOCK_SIZE	12
 #define RISCV_HWPROBE_KEY_VENDOR_EXT_SIFIVE_0	13
 #define RISCV_HWPROBE_KEY_VENDOR_EXT_MIPS_0	14
+#define RISCV_HWPROBE_KEY_ZICBOP_BLOCK_SIZE	15
 /* Increase RISCV_HWPROBE_MAX_KEY when adding items. */
 
 /* Flags */
-- 
2.47.2