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[2001:1ae9:1c2:4c00:20f:c6b4:1e57:7965]) by smtp.gmail.com with ESMTPSA id n18-20020a05640206d200b005224d960e66sm5533135edy.96.2023.09.25.07.13.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Sep 2023 07:13:41 -0700 (PDT) Date: Mon, 25 Sep 2023 16:13:40 +0200 From: Andrew Jones To: Anup Patel Cc: Paolo Bonzini , Atish Patra , Palmer Dabbelt , Paul Walmsley , Conor Dooley , Rob Herring , Krzysztof Kozlowski , Shuah Khan , Mayuresh Chitale , devicetree@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH v2 4/9] RISC-V: Detect Zicond from ISA string Message-ID: <20230925-434ad7cfaea0011fe0fb9989@orel> References: <20230925133859.1735879-1-apatel@ventanamicro.com> <20230925133859.1735879-5-apatel@ventanamicro.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230925133859.1735879-5-apatel@ventanamicro.com> Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org On Mon, Sep 25, 2023 at 07:08:54PM +0530, Anup Patel wrote: > The RISC-V integer conditional (Zicond) operation extension defines > standard conditional arithmetic and conditional-select/move operations > which are inspired from the XVentanaCondOps extension. In fact, QEMU > RISC-V also has support for emulating Zicond extension. > > Let us detect Zicond extension from ISA string available through > DT or ACPI. > > Signed-off-by: Anup Patel > --- > 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 b7efe9e2fa89..15bafc02ffd4 100644 > --- a/arch/riscv/include/asm/hwcap.h > +++ b/arch/riscv/include/asm/hwcap.h > @@ -60,6 +60,7 @@ > #define RISCV_ISA_EXT_ZIHPM 42 > #define RISCV_ISA_EXT_SMSTATEEN 43 > #define RISCV_ISA_EXT_XVENTANACONDOPS 44 > +#define RISCV_ISA_EXT_ZICOND 45 > > #define RISCV_ISA_EXT_MAX 64 > > diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c > index 3a31d34fe709..7f683916f2c2 100644 > --- a/arch/riscv/kernel/cpufeature.c > +++ b/arch/riscv/kernel/cpufeature.c > @@ -167,6 +167,7 @@ const struct riscv_isa_ext_data riscv_isa_ext[] = { > __RISCV_ISA_EXT_DATA(zicbom, RISCV_ISA_EXT_ZICBOM), > __RISCV_ISA_EXT_DATA(zicboz, RISCV_ISA_EXT_ZICBOZ), > __RISCV_ISA_EXT_DATA(zicntr, RISCV_ISA_EXT_ZICNTR), > + __RISCV_ISA_EXT_DATA(zicond, RISCV_ISA_EXT_ZICOND), > __RISCV_ISA_EXT_DATA(zicsr, RISCV_ISA_EXT_ZICSR), > __RISCV_ISA_EXT_DATA(zifencei, RISCV_ISA_EXT_ZIFENCEI), > __RISCV_ISA_EXT_DATA(zihintpause, RISCV_ISA_EXT_ZIHINTPAUSE), > -- > 2.34.1 > Reviewed-by: Andrew Jones