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([2a01:e0a:999:a3a0:96:820c:ecf7:a817]) by smtp.gmail.com with ESMTPSA id fj7-20020a05600c0c8700b0040772138bb7sm9873393wmb.2.2023.10.17.06.15.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Oct 2023 06:15:34 -0700 (PDT) From: =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= To: linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Cc: =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= , Palmer Dabbelt , Paul Walmsley , Rob Herring , Krzysztof Kozlowski , Albert Ou , Jonathan Corbet , Andrew Jones , Evan Green , Conor Dooley , Samuel Ortiz Subject: [PATCH v2 09/19] riscv: hwprobe: export Zfh/Zfhmin ISA extensions Date: Tue, 17 Oct 2023 15:14:46 +0200 Message-ID: <20231017131456.2053396-10-cleger@rivosinc.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231017131456.2053396-1-cleger@rivosinc.com> References: <20231017131456.2053396-1-cleger@rivosinc.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 Export Zfh/Zfhmin ISA extensions[1] through hwprobe only if FPU support is available. Link: https://drive.google.com/file/d/1z3tQQLm5ALsAD77PM0l0CHnapxWCeVzP/vie= w [1] Signed-off-by: Cl=C3=A9ment L=C3=A9ger Reviewed-by: Evan Green --- Documentation/riscv/hwprobe.rst | 6 ++++++ arch/riscv/include/uapi/asm/hwprobe.h | 2 ++ arch/riscv/kernel/sys_riscv.c | 5 +++++ 3 files changed, 13 insertions(+) diff --git a/Documentation/riscv/hwprobe.rst b/Documentation/riscv/hwprobe.= rst index 8681fb601500..35aedfff5049 100644 --- a/Documentation/riscv/hwprobe.rst +++ b/Documentation/riscv/hwprobe.rst @@ -137,6 +137,12 @@ The following keys are defined: * :c:macro:`RISCV_HWPROBE_EXT_ZVKT`: The Zvkt extension is supported as defined in version 1.0 of the RISC-V Cryptography Extensions Volume= II. =20 + * :c:macro:`RISCV_HWPROBE_EXT_ZFH`: The Zfh extension version 1.0 is sup= ported + as defined in the RISC-V ISA manual. + + * :c:macro:`RISCV_HWPROBE_EXT_ZFHMIN`: The Zfhmin extension version 1.0 = is + supported as defined in the RISC-V ISA manual. + * :c:macro:`RISCV_HWPROBE_KEY_CPUPERF_0`: A bitmask that contains performa= nce information about the selected set of processors. =20 diff --git a/arch/riscv/include/uapi/asm/hwprobe.h b/arch/riscv/include/uap= i/asm/hwprobe.h index 2529cee323db..390805c49674 100644 --- a/arch/riscv/include/uapi/asm/hwprobe.h +++ b/arch/riscv/include/uapi/asm/hwprobe.h @@ -49,6 +49,8 @@ struct riscv_hwprobe { #define RISCV_HWPROBE_EXT_ZVKSED (1 << 23) #define RISCV_HWPROBE_EXT_ZVKSH (1 << 24) #define RISCV_HWPROBE_EXT_ZVKT (1 << 25) +#define RISCV_HWPROBE_EXT_ZFH (1 << 26) +#define RISCV_HWPROBE_EXT_ZFHMIN (1 << 27) #define RISCV_HWPROBE_KEY_CPUPERF_0 5 #define RISCV_HWPROBE_MISALIGNED_UNKNOWN (0 << 0) #define RISCV_HWPROBE_MISALIGNED_EMULATED (1 << 0) diff --git a/arch/riscv/kernel/sys_riscv.c b/arch/riscv/kernel/sys_riscv.c index 25d35800809f..4cca8b982a7a 100644 --- a/arch/riscv/kernel/sys_riscv.c +++ b/arch/riscv/kernel/sys_riscv.c @@ -185,6 +185,11 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pai= r, CHECK_ISA_EXT(ZVKSH); CHECK_ISA_EXT(ZVKT); } + + if (has_fpu()) { + CHECK_ISA_EXT(ZFH); + CHECK_ISA_EXT(ZFHMIN); + } #undef CHECK_ISA_EXT } =20 --=20 2.42.0