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[88.28.30.180]) by smtp.gmail.com with ESMTPSA id o42-20020a05600c33aa00b003e215a796fasm1818221wmp.34.2023.03.03.01.36.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 03 Mar 2023 01:36:05 -0800 (PST) Message-ID: <3958a606-1e36-9a66-0ea0-ef2bc9749fb4@linaro.org> Date: Fri, 3 Mar 2023 10:36:03 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Thunderbird/102.8.0 Subject: Re: Emulating graviton G3 Content-Language: en-US To: Robert Henry References: Cc: QEMU Developers , "qemu-discuss@nongnu.org" , qemu-arm 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::329; envelope-from=philmd@linaro.org; helo=mail-wm1-x329.google.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 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=-0.092, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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 Cc'ing qemu-arm@ list On 3/3/23 08:20, Robert Henry wrote: > I cannot figure out how to make QEMU TCG emulate aarch64 Graviton G3. > I'm working against master/head of the QEMU source. > > I come up with feature names by consulting > https://marcin.juszkiewicz.com.pl/download/tables/arm-socs.html >  which > is compendium of the /proc/cpuinfo info crowd sourced from linux running > on real systems > > I'm trying to either (a) add features to QEMU's '-cpu neoverse-n1,...' > or (b) take features away from '-cpu max,...' > > Unfortunately, many names of implemented or unimplemented features are > not known by the -cpu mechanism.  For example, from max I want to kill > "smeb16f32", or from neoverse-n1 I want to add in "svei8mm", but neither > name is known.  Indeed, the only names known by -cpu are those exposed > via the qmp mechanism are of the form  "sveNNN" for vector bit width NNN. > > Is there some trick I'm missing?