diff mbox series

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

Message ID 20230410043646.3138446-2-dfustini@baylibre.com (mailing list archive)
State Superseded
Headers show
Series RISC-V: Detect Ssqosid extension and handle sqoscfg CSR | expand

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conchuod/maintainers_pattern success MAINTAINERS pattern errors before the patch: 1 and now 1
conchuod/verify_signedoff success Signed-off-by tag matches author and committer
conchuod/kdoc success Errors and warnings before: 0 this patch: 0
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conchuod/build_rv64_gcc_allmodconfig success Errors and warnings before: 17624 this patch: 17624
conchuod/build_rv32_defconfig success Build OK
conchuod/dtb_warn_rv64 success Errors and warnings before: 3 this patch: 3
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conchuod/source_inline success Was 0 now: 0
conchuod/build_rv64_nommu_k210_defconfig success Build OK
conchuod/verify_fixes success No Fixes tag
conchuod/build_rv64_nommu_virt_defconfig success Build OK

Commit Message

Drew Fustini April 10, 2023, 4:36 a.m. UTC 
From: Kornel Dulęba <mindal@semihalf.com>

Detect the Ssqosid extension (Supervisor-mode Quality of Service ID) as
defined in the CBQRI (Capacity and Bandwidth QoS Register Interface)
specification.

Link: https://github.com/riscv-non-isa/riscv-cmqri/blob/main/riscv-cbqri.pdf
Signed-off-by: Kornel Dulęba <mindal@semihalf.com>
[dfustini: rebase from v6.0 to v6.3]
Signed-off-by: Drew Fustini <dfustini@baylibre.com>
---
Note: the Ssqosid extension and CBQRI spec are still in a draft state.

 arch/riscv/include/asm/hwcap.h | 2 ++
 arch/riscv/kernel/cpu.c        | 1 +
 arch/riscv/kernel/cpufeature.c | 1 +
 3 files changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h
index 9af793970855..6dd717030723 100644
--- a/arch/riscv/include/asm/hwcap.h
+++ b/arch/riscv/include/asm/hwcap.h
@@ -44,6 +44,8 @@ 
 #define RISCV_ISA_EXT_ZIHINTPAUSE	32
 #define RISCV_ISA_EXT_SVNAPOT		33
 #define RISCV_ISA_EXT_ZICBOZ		34
+#define RISCV_ISA_EXT_SSQOSID		35
+
 
 #define RISCV_ISA_EXT_MAX		64
 #define RISCV_ISA_EXT_NAME_LEN_MAX	32
diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c
index 9203e18320f9..04bd0a21910e 100644
--- a/arch/riscv/kernel/cpu.c
+++ b/arch/riscv/kernel/cpu.c
@@ -190,6 +190,7 @@  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(sscofpmf, RISCV_ISA_EXT_SSCOFPMF),
+	__RISCV_ISA_EXT_DATA(ssqosid, RISCV_ISA_EXT_SSQOSID),
 	__RISCV_ISA_EXT_DATA(sstc, RISCV_ISA_EXT_SSTC),
 	__RISCV_ISA_EXT_DATA(svinval, RISCV_ISA_EXT_SVINVAL),
 	__RISCV_ISA_EXT_DATA(svnapot, RISCV_ISA_EXT_SVNAPOT),
diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
index 00d7cd2c9043..94bf5556347d 100644
--- a/arch/riscv/kernel/cpufeature.c
+++ b/arch/riscv/kernel/cpufeature.c
@@ -226,6 +226,7 @@  void __init riscv_fill_hwcap(void)
 			} else {
 				/* sorted alphabetically */
 				SET_ISA_EXT_MAP("sscofpmf", RISCV_ISA_EXT_SSCOFPMF);
+				SET_ISA_EXT_MAP("ssqosid", RISCV_ISA_EXT_SSQOSID);
 				SET_ISA_EXT_MAP("sstc", RISCV_ISA_EXT_SSTC);
 				SET_ISA_EXT_MAP("svinval", RISCV_ISA_EXT_SVINVAL);
 				SET_ISA_EXT_MAP("svnapot", RISCV_ISA_EXT_SVNAPOT);