RISC-V: add vector crypto extension detection
From: Heiko Stuebner <heiko.stuebner@...> Date: Tue, 31 Jan 2023 11:52:46 +0100
Commit-Message
Add detection for some extensions of the vector-crypto specification, namely - Zvkb: Vector Bit-manipulation used in Cryptography - Zvkg: Vector GCM/GMAC - Zvknha and Zvknhb: NIST Algorithm Suite As their use is very specific and will likely be limited to special places we expect current code to just pre-encode those instructions, so right now we don't introduce toolchain requirements. Signed-off-by: Heiko Stuebner <heiko.stuebner@...>
Patch-Comment
arch/riscv/include/asm/hwcap.h | 4 ++++ arch/riscv/kernel/cpu.c | 4 ++++ arch/riscv/kernel/cpufeature.c | 4 ++++ 3 files changed, 12 insertions(+)
Statistics
- 12 lines added
- 0 lines removed
Changes
------------------------ arch/riscv/include/asm/hwcap.h ------------------------
index 23427b9ed1e6..ce683dfb849f 100644
@@ -64,6 +64,10 @@ enum riscv_isa_ext_id {
RISCV_ISA_EXT_ZBKB,
RISCV_ISA_EXT_ZICBOM,
RISCV_ISA_EXT_ZIHINTPAUSE,
+ RISCV_ISA_EXT_ZVKB,
+ RISCV_ISA_EXT_ZVKG,
+ RISCV_ISA_EXT_ZVKNHA,
+ RISCV_ISA_EXT_ZVKNHB,
RISCV_ISA_EXT_ID_MAX
};
static_assert(RISCV_ISA_EXT_ID_MAX <= RISCV_ISA_EXT_MAX);
--------------------------- arch/riscv/kernel/cpu.c ----------------------------
index f9f361285b04..bc615dbbf766 100644
@@ -190,6 +190,10 @@ static struct riscv_isa_ext_data isa_ext_arr[] = {
__RISCV_ISA_EXT_DATA(zbkb, RISCV_ISA_EXT_ZBKB),
__RISCV_ISA_EXT_DATA(zicbom, RISCV_ISA_EXT_ZICBOM),
__RISCV_ISA_EXT_DATA(zihintpause, RISCV_ISA_EXT_ZIHINTPAUSE),
+ __RISCV_ISA_EXT_DATA(zvkb, RISCV_ISA_EXT_ZVKB),
+ __RISCV_ISA_EXT_DATA(zvkg, RISCV_ISA_EXT_ZVKG),
+ __RISCV_ISA_EXT_DATA(zvknha, RISCV_ISA_EXT_ZVKNHA),
+ __RISCV_ISA_EXT_DATA(zvknhb, RISCV_ISA_EXT_ZVKNHB),
__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 695dfd732483..4f08b7d97810 100644
@@ -239,6 +239,10 @@ printk("!!!! isa-string: %s\n\n\n", isa);
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);
+ SET_ISA_EXT_MAP("zvkb", RISCV_ISA_EXT_ZVKB);
+ SET_ISA_EXT_MAP("zvkg", RISCV_ISA_EXT_ZVKG);
+ SET_ISA_EXT_MAP("zvknha", RISCV_ISA_EXT_ZVKNHA);
+ SET_ISA_EXT_MAP("zvknhb", RISCV_ISA_EXT_ZVKNHB);
}
#undef SET_ISA_EXT_MAP
}