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Mon, 01 Sep 2025 21:24:42 -0700 (PDT) Received: from J9GPGXL7NT.bytedance.net ([61.213.176.56]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-327e21d14a8sm12216706a91.2.2025.09.01.21.24.36 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Mon, 01 Sep 2025 21:24:42 -0700 (PDT) From: Xu Lu To: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, ajones@ventanamicro.com, brs@rivosinc.com Cc: devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, apw@canonical.com, joe@perches.com, Xu Lu Subject: [PATCH v2 0/4] riscv: Add Zalasr ISA extension support Date: Tue, 2 Sep 2025 12:24:28 +0800 Message-Id: <20250902042432.78960-1-luxu.kernel@bytedance.com> X-Mailer: git-send-email 2.39.5 (Apple Git-154) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250901_212443_381536_E196D943 X-CRM114-Status: UNSURE ( 9.59 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org This patch adds support for the Zalasr ISA extension, which supplies the real load acquire/store release instructions. The specification can be found here: https://github.com/riscv/riscv-zalasr/blob/main/chapter2.adoc This patch seires has been tested with ltp on Qemu with Brensan's zalasr support patch[1]. Some false positive spacing error happens during patch checking. Thus I CCed maintainers of checkpatch.pl as well. [1] https://lore.kernel.org/all/CAGPSXwJEdtqW=nx71oufZp64nK6tK=0rytVEcz4F-gfvCOXk2w@mail.gmail.com/ v2: - Adjust the order of Zalasr and Zalrsc in dt-bindings. Thanks to Conor. Xu Lu (4): riscv: add ISA extension parsing for Zalasr dt-bindings: riscv: Add Zalasr ISA extension description riscv: Instroduce Zalasr instructions riscv: Use Zalasr for smp_load_acquire/smp_store_release .../devicetree/bindings/riscv/extensions.yaml | 5 ++ arch/riscv/include/asm/barrier.h | 79 ++++++++++++++++--- arch/riscv/include/asm/hwcap.h | 1 + arch/riscv/include/asm/insn-def.h | 79 +++++++++++++++++++ arch/riscv/kernel/cpufeature.c | 1 + 5 files changed, 154 insertions(+), 11 deletions(-) -- 2.20.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv