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Wed, 21 Sep 2022 14:45:50 -0700 (PDT) From: Chris Stillson To: Cc: Guo Ren , Guo Ren , Anup Patel , Greentime Hu , Palmer Dabbelt , Paul Walmsley , Palmer Dabbelt , Albert Ou , Eric Biederman , Kees Cook , Atish Patra , Oleg Nesterov , Heinrich Schuchardt , Guo Ren , Conor Dooley , Mayuresh Chitale , Chris Stillson , Paolo Bonzini , Qinglin Pan , Alexandre Ghiti , Arnd Bergmann , Vincent Chen , Heiko Stuebner , Dao Lu , Jisheng Zhang , Geert Uytterhoeven , Sunil V L , Nick Knight , Han-Kuan Chen , Changbin Du , Li Zhengyu , Alexander Graf , Ard Biesheuvel , Tsukasa OI , Yury Norov , Nicolas Saenz Julienne , Frederic Weisbecker , Mark Rutland , Myrtle Shah , Vitaly Wool , Mathieu Desnoyers , Catalin Marinas , Will Deacon , Mark Brown , Heiko Carstens , Alexey Dobriyan , Huacai Chen , Christian Brauner , Eugene Syromiatnikov , Peter Collingbourne , Colin Cross , Andrew Morton , Barret Rhoden , Suren Baghdasaryan , Davidlohr Bueso , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org Subject: [PATCH v12 02/17] riscv: Extending cpufeature.c to detect V-extension Date: Wed, 21 Sep 2022 14:43:44 -0700 Message-Id: <20220921214439.1491510-2-stillson@rivosinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220921214439.1491510-1-stillson@rivosinc.com> References: <20220921214439.1491510-1-stillson@rivosinc.com> MIME-Version: 1.0 ARC-Seal: i=1; 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dkim=pass header.d=rivosinc-com.20210112.gappssmtp.com header.s=20210112 header.b=gRooOxAT; dmarc=none; spf=pass (imf27.hostedemail.com: domain of stillson@rivosinc.com designates 209.85.214.171 as permitted sender) smtp.mailfrom=stillson@rivosinc.com X-Rspamd-Queue-Id: 15BB64000D X-Rspamd-Server: rspam04 X-HE-Tag: 1663796751-923432 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Guo Ren Current cpufeature.c doesn't support detecting V-extension, because "rv64" also contain a 'v' letter and we need to skip it. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Anup Patel Reviewed-by: Greentime Hu Signed-off-by: Greentime Hu Reviewed-by: Palmer Dabbelt --- arch/riscv/include/uapi/asm/hwcap.h | 1 + arch/riscv/kernel/cpufeature.c | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/riscv/include/uapi/asm/hwcap.h b/arch/riscv/include/uapi/asm/hwcap.h index 46dc3f5ee99f..c52bb7bbbabe 100644 --- a/arch/riscv/include/uapi/asm/hwcap.h +++ b/arch/riscv/include/uapi/asm/hwcap.h @@ -21,5 +21,6 @@ #define COMPAT_HWCAP_ISA_F (1 << ('F' - 'A')) #define COMPAT_HWCAP_ISA_D (1 << ('D' - 'A')) #define COMPAT_HWCAP_ISA_C (1 << ('C' - 'A')) +#define COMPAT_HWCAP_ISA_V (1 << ('V' - 'A')) #endif /* _UAPI_ASM_RISCV_HWCAP_H */ diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index 553d755483ed..8d4448c2d4f4 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -83,6 +83,7 @@ void __init riscv_fill_hwcap(void) isa2hwcap['f'] = isa2hwcap['F'] = COMPAT_HWCAP_ISA_F; isa2hwcap['d'] = isa2hwcap['D'] = COMPAT_HWCAP_ISA_D; isa2hwcap['c'] = isa2hwcap['C'] = COMPAT_HWCAP_ISA_C; + isa2hwcap['v'] = isa2hwcap['V'] = COMPAT_HWCAP_ISA_V; elf_hwcap = 0;