RISC-V: add Zbkb extension detection
From: Heiko Stuebner <heiko.stuebner@...> Date: Tue, 31 Jan 2023 11:11:47 +0100
Commit-Message
Add detection for Zbkb extension. Zbkb is part of the set of scalar cryptography extensions and provides bitmanip instructions for cryptography, with them being a "subset of the Zbb extension particularly useful for cryptography". Zbkb was ratified in january 2022. Expect code using the extension to pre-encode zbkb instructions, so don't introduce special toolchain requirements for now. Signed-off-by: Heiko Stuebner <heiko.stuebner@...>
Patch-Comment
arch/riscv/include/asm/hwcap.h | 1 + arch/riscv/kernel/cpu.c | 1 + arch/riscv/kernel/cpufeature.c | 1 + 3 files changed, 3 insertions(+)
Statistics
- 3 lines added
- 0 lines removed
Changes
------------------------ arch/riscv/include/asm/hwcap.h ------------------------
index 92f234c6cb4c..b28548fb10f3 100644
@@ -44,6 +44,7 @@
#define RISCV_ISA_EXT_ZICBOM 31
#define RISCV_ISA_EXT_ZIHINTPAUSE 32
#define RISCV_ISA_EXT_ZBC 33
+#define RISCV_ISA_EXT_ZBKB 34
#define RISCV_ISA_EXT_MAX 64
#define RISCV_ISA_EXT_NAME_LEN_MAX 32
--------------------------- arch/riscv/kernel/cpu.c ----------------------------
index 5d47a0c75c69..6f65aac68018 100644
@@ -189,6 +189,7 @@ static struct riscv_isa_ext_data isa_ext_arr[] = {
__RISCV_ISA_EXT_DATA(zihintpause, RISCV_ISA_EXT_ZIHINTPAUSE),
__RISCV_ISA_EXT_DATA(zbb, RISCV_ISA_EXT_ZBB),
__RISCV_ISA_EXT_DATA(zbc, RISCV_ISA_EXT_ZBC),
+ __RISCV_ISA_EXT_DATA(zbkb, RISCV_ISA_EXT_ZBKB),
__RISCV_ISA_EXT_DATA(sscofpmf, RISCV_ISA_EXT_SSCOFPMF),
__RISCV_ISA_EXT_DATA(sstc, RISCV_ISA_EXT_SSTC),
__RISCV_ISA_EXT_DATA(svinval, RISCV_ISA_EXT_SVINVAL),
------------------------ arch/riscv/kernel/cpufeature.c ------------------------
index c9099694b5bb..eb7be8e7f24e 100644
@@ -229,6 +229,7 @@ void __init riscv_fill_hwcap(void)
SET_ISA_EXT_MAP("svpbmt", RISCV_ISA_EXT_SVPBMT);
SET_ISA_EXT_MAP("zbb", RISCV_ISA_EXT_ZBB);
SET_ISA_EXT_MAP("zbc", RISCV_ISA_EXT_ZBC);
+ SET_ISA_EXT_MAP("zbkb", RISCV_ISA_EXT_ZBKB);
SET_ISA_EXT_MAP("zicbom", RISCV_ISA_EXT_ZICBOM);
SET_ISA_EXT_MAP("zihintpause", RISCV_ISA_EXT_ZIHINTPAUSE);
}