[PATCH 1/2] RISC-V: Detect the Ssqosid extension

Drew Fustini fustini at kernel.org
Wed Sep 10 23:15:29 PDT 2025


Ssqosid is the RISC-V Quality-of-Service (QoS) Identifiers specification
which defines the Supervisor Resource Management Configuration (srmcfg)
register.

Link: https://github.com/riscv/riscv-ssqosid/releases/tag/v1.0
Signed-off-by: Kornel Dulęba <mindal at semihalf.com>
[fustini: rebase on v6.17-rc5]
Signed-off-by: Drew Fustini <fustini at kernel.org>
---
 arch/riscv/include/asm/hwcap.h | 1 +
 arch/riscv/kernel/cpufeature.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h
index affd63e11b0a344c33a73647351ac02a94e42981..b4239f4f092d036ee3d037177b990e317d34a77f 100644
--- a/arch/riscv/include/asm/hwcap.h
+++ b/arch/riscv/include/asm/hwcap.h
@@ -106,6 +106,7 @@
 #define RISCV_ISA_EXT_ZAAMO		97
 #define RISCV_ISA_EXT_ZALRSC		98
 #define RISCV_ISA_EXT_ZICBOP		99
+#define RISCV_ISA_EXT_SSQOSID		100
 
 #define RISCV_ISA_EXT_XLINUXENVCFG	127
 
diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
index 743d53415572e071fb22851161bd079ef3158b7c..e202564f6f7b550f3b44a0826b5a67d5c4ebee96 100644
--- a/arch/riscv/kernel/cpufeature.c
+++ b/arch/riscv/kernel/cpufeature.c
@@ -533,6 +533,7 @@ const struct riscv_isa_ext_data riscv_isa_ext[] = {
 	__RISCV_ISA_EXT_DATA(ssaia, RISCV_ISA_EXT_SSAIA),
 	__RISCV_ISA_EXT_DATA(sscofpmf, RISCV_ISA_EXT_SSCOFPMF),
 	__RISCV_ISA_EXT_SUPERSET(ssnpm, RISCV_ISA_EXT_SSNPM, riscv_xlinuxenvcfg_exts),
+	__RISCV_ISA_EXT_DATA(ssqosid, RISCV_ISA_EXT_SSQOSID),
 	__RISCV_ISA_EXT_DATA(sstc, RISCV_ISA_EXT_SSTC),
 	__RISCV_ISA_EXT_DATA(svade, RISCV_ISA_EXT_SVADE),
 	__RISCV_ISA_EXT_DATA_VALIDATE(svadu, RISCV_ISA_EXT_SVADU, riscv_ext_svadu_validate),

-- 
2.34.1




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