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[2003:f6:af13:1a00:27bd:20bf:c18c:447d]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-4255d8a6c54sm21356683f8f.11.2025.10.06.06.57.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Oct 2025 06:57:40 -0700 (PDT) Date: Mon, 6 Oct 2025 15:57:38 +0200 (CEST) From: Sebastian Ott To: Tariq Toukan cc: Catalin Marinas , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , "David S. Miller" , Saeed Mahameed , Leon Romanovsky , Mark Bloch , netdev@vger.kernel.org, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, Gal Pressman , Leon Romanovsky , Jason Gunthorpe , Michael Guralnik , Moshe Shemesh , Will Deacon , Alexander Gordeev , Andrew Morton , Christian Borntraeger , Borislav Petkov , Dave Hansen , Gerald Schaefer , Vasily Gorbik , Heiko Carstens , "H. Peter Anvin" , Justin Stitt , linux-s390@vger.kernel.org, llvm@lists.linux.dev, Ingo Molnar , Bill Wendling , Nathan Chancellor , Nick Desaulniers , Salil Mehta , Sven Schnelle , Thomas Gleixner , x86@kernel.org, Yisen Zhuang , Arnd Bergmann , Leon Romanovsky , linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Mark Rutland , Michael Guralnik , patches@lists.linux.dev, Niklas Schnelle , Jijie Shao , Simon Horman , Patrisious Haddad Subject: Re: [PATCH net-next V6] net/mlx5: Improve write-combining test reliability for ARM64 Grace CPUs In-Reply-To: <1759093688-841357-1-git-send-email-tariqt@nvidia.com> Message-ID: References: <1759093688-841357-1-git-send-email-tariqt@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed On Mon, 29 Sep 2025, Tariq Toukan wrote: > +static void mlx5_iowrite64_copy(struct mlx5_wc_sq *sq, __be32 mmio_wqe[16], > + size_t mmio_wqe_size, unsigned int offset) > +{ > +#if IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && IS_ENABLED(CONFIG_ARM64) > + if (cpu_has_neon()) { > + kernel_neon_begin(); > + asm volatile > + (".arch_extension simd;\n\t" > + "ld1 {v0.16b, v1.16b, v2.16b, v3.16b}, [%0]\n\t" > + "st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [%1]" > + : > + : "r"(mmio_wqe), "r"(sq->bfreg.map + offset) > + : "memory", "v0", "v1", "v2", "v3"); > + kernel_neon_end(); > + return; > + } > +#endif This one breaks the build for me: /tmp/cc2vw3CJ.s: Assembler messages: /tmp/cc2vw3CJ.s:391: Error: unknown architectural extension `simd;' Removing the extra ";" after simd seems to fix it. Regards, Sebastian