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Mon, 23 Aug 2021 10:43:15 -0700 (PDT) Received: from [192.168.1.11] ([71.212.149.176]) by smtp.gmail.com with ESMTPSA id x13sm15172502pjh.30.2021.08.23.10.43.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 23 Aug 2021 10:43:15 -0700 (PDT) Subject: Re: [PATCH v2 1/4] target/arm/cpu: Introduce sve_vq_supported bitmap To: Andrew Jones , qemu-devel@nongnu.org, qemu-arm@nongnu.org References: <20210823160647.34028-1-drjones@redhat.com> <20210823160647.34028-2-drjones@redhat.com> From: Richard Henderson Message-ID: Date: Mon, 23 Aug 2021 10:43:13 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <20210823160647.34028-2-drjones@redhat.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::529; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x529.google.com X-Spam_score_int: -40 X-Spam_score: -4.1 X-Spam_bar: ---- X-Spam_report: (-4.1 / 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, NICE_REPLY_A=-2.023, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, philmd@redhat.com, ishii.shuuichir@fujitsu.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 8/23/21 9:06 AM, Andrew Jones wrote: > Allow CPUs that support SVE to specify which SVE vector lengths they > support by setting them in this bitmap. Currently only the 'max' and > 'host' CPU types supports SVE and 'host' requires KVM which obtains > its supported bitmap from the host. So, we only need to initialize the > bitmap for 'max' with TCG. And, since 'max' should support all SVE > vector lengths we simply fill the bitmap. Future CPU types may have > less trivial maps though. > > Signed-off-by: Andrew Jones > Reviewed-by: Philippe Mathieu-Daudé > --- > target/arm/cpu.h | 4 ++++ > target/arm/cpu64.c | 2 ++ > 2 files changed, 6 insertions(+) Reviewed-by: Richard Henderson r~