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[88.187.86.199]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-32e1b120281sm1933051fa.59.2025.07.04.06.17.24 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 04 Jul 2025 06:17:25 -0700 (PDT) Message-ID: Date: Fri, 4 Jul 2025 15:17:22 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/6] target/arm: Only allow disabling NEON when using TCG To: Peter Maydell Cc: qemu-devel@nongnu.org, =?UTF-8?Q?Alex_Benn=C3=A9e?= , Alexander Graf , qemu-arm@nongnu.org, Pierrick Bouvier References: <20250630130937.3487-1-philmd@linaro.org> <20250630130937.3487-3-philmd@linaro.org> Content-Language: en-US From: =?UTF-8?Q?Philippe_Mathieu-Daud=C3=A9?= In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::22c; envelope-from=philmd@linaro.org; helo=mail-lj1-x22c.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 4/7/25 15:03, Peter Maydell wrote: > On Mon, 30 Jun 2025 at 14:09, Philippe Mathieu-Daudé wrote: >> >> Only allow disabling NEON when using TCG. >> >> This avoids confusing user experience: >> >> $ qemu-system-aarch64 -M virt -accel hvf \ >> -cpu host,neon=off,vfp=off,vfp-d32=off >> qemu-system-aarch64: AArch64 CPUs must have both VFP and Neon or neither >> >> $ qemu-system-aarch64 -M virt -accel hvf \ >> -cpu host,neon=off,vfp=off,vfp-d32=off >> qemu-system-aarch64: ARM CPUs must have both VFP-D32 and Neon or neither >> >> $ qemu-system-aarch64 -M virt -accel hvf \ >> -cpu host,neon=off,vfp=off,vfp-d32=off >> qemu-system-aarch64: can't apply global host-arm-cpu.vfp-d32=off: Property 'host-arm-cpu.vfp-d32' not found > > I don't know about users, but I'm definitely confused. > Aren't these three all the same command line ? What's > the problem it's trying to show ? I should have only shared this confusing example: $ qemu-system-aarch64 -M virt -accel hvf -cpu host,vfp-d32=off qemu-system-aarch64: can't apply global host-arm-cpu.vfp-d32=off: Property 'host-arm-cpu.vfp-d32' not found