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Fri, 26 Apr 2024 09:06:23 -0700 (PDT) Message-ID: Date: Fri, 26 Apr 2024 09:06:21 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 1/1] hw/arm/sbsa-ref: Enable CPU cluster on ARM sbsa machine To: Xiong Yining , qemu-arm@nongnu.org, qemu-devel@nongnu.org Cc: rad@semihalf.com, peter.maydell@linaro.org, quic_llindhol@quicinc.com, marcin.juszkiewicz@linaro.org References: <20240426073553.326946-1-xiongyining1480@phytium.com.cn> <20240426073553.326946-2-xiongyining1480@phytium.com.cn> Content-Language: en-US From: Richard Henderson In-Reply-To: <20240426073553.326946-2-xiongyining1480@phytium.com.cn> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2607:f8b0:4864:20::42a; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x42a.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=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 On 4/26/24 00:35, Xiong Yining wrote: > From: xiongyining1480 > > Enable CPU cluster support on SbsaQemu platform, so that users can > specify a 4-level CPU hierarchy sockets/clusters/cores/threads. And > this topology can be passed to the firmware through DT cpu-map. > > Signed-off-by: Xiong Yining > tested-by: Marcin Juszkiewicz > --- > docs/system/arm/sbsa.rst | 4 ++++ > hw/arm/sbsa-ref.c | 37 ++++++++++++++++++++++++++++++++++++- > 2 files changed, 40 insertions(+), 1 deletion(-) Isn't this basically what MPIDR_EL1 is supposed to indicate? We do not yet implement all of that in QEMU, but should. Why does the same info need to be replicated in devicetree? r~