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([2601:1c2:1801:d250:45c0:94f2:eea7:6dc3]) by smtp.gmail.com with ESMTPSA id x24-20020aa793b8000000b00634a96493f7sm2394411pff.128.2023.04.09.21.34.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 09 Apr 2023 21:34:21 -0700 (PDT) From: Drew Fustini To: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Palmer Dabbelt , Paul Walmsley , Conor Dooley , Atish Patra , =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= , James Morse , =?UTF-8?q?Kornel=20Dul=C4=99ba?= , Adrien Ricciardi Cc: Drew Fustini Subject: [RFC PATCH 1/2] RISC-V: Detect the Ssqosid extension Date: Sun, 9 Apr 2023 21:36:45 -0700 Message-Id: <20230410043646.3138446-2-dfustini@baylibre.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230410043646.3138446-1-dfustini@baylibre.com> References: <20230410043646.3138446-1-dfustini@baylibre.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kornel Dul=C4=99ba 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 Dul=C4=99ba [dfustini: rebase from v6.0 to v6.3] Signed-off-by: Drew Fustini --- 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 --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 + =20 #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[] =3D { __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); --=20 2.34.1