riscv: Add ISA extension parsing for Svvptc

Add support to parse the Svvptc string in the riscv,isa string.

Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240717060125.139416-2-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h
index e17d0078a65116810cda686225c78e0ff420a603..6dd0dd8beb30335eb0a796c02c992b22e7641f05 100644 (file)
--- a/arch/riscv/include/asm/hwcap.h
+++ b/arch/riscv/include/asm/hwcap.h
@@ -81,6 +81,7 @@
 #define RISCV_ISA_EXT_ZTSO             72
 #define RISCV_ISA_EXT_ZACAS            73
 #define RISCV_ISA_EXT_XANDESPMU                74
+#define RISCV_ISA_EXT_SVVPTC           75
 
 #define RISCV_ISA_EXT_XLINUXENVCFG     127
 

diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
index 5ef48cb20ee119eceb82c71db65f86fe683c58b6..60780d246743e34d913b38821a0a3434eb2e4695 100644 (file)
--- a/arch/riscv/kernel/cpufeature.c
+++ b/arch/riscv/kernel/cpufeature.c
@@ -305,6 +305,7 @@ const struct riscv_isa_ext_data riscv_isa_ext[] = {
        __RISCV_ISA_EXT_DATA(svnapot, RISCV_ISA_EXT_SVNAPOT),
        __RISCV_ISA_EXT_DATA(svpbmt, RISCV_ISA_EXT_SVPBMT),
        __RISCV_ISA_EXT_DATA(xandespmu, RISCV_ISA_EXT_XANDESPMU),
+       __RISCV_ISA_EXT_DATA(svvptc, RISCV_ISA_EXT_SVVPTC),
 };
 
 const size_t riscv_isa_ext_count = ARRAY_SIZE(riscv_isa_ext);