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Thu, 04 Mar 2021 11:49:02 -0800 (PST) Received: from [192.168.1.11] ([71.212.131.83]) by smtp.gmail.com with ESMTPSA id z29sm193551pfr.114.2021.03.04.11.49.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 04 Mar 2021 11:49:02 -0800 (PST) Subject: Re: [PATCH 16/44] hw/misc/iotkit-sysctl: Implement dummy version of SSE-300 PWRCTRL register To: Peter Maydell , qemu-arm@nongnu.org, qemu-devel@nongnu.org References: <20210219144617.4782-1-peter.maydell@linaro.org> <20210219144617.4782-17-peter.maydell@linaro.org> From: Richard Henderson Message-ID: <2d46c632-6c37-0a2f-3807-116c435052c5@linaro.org> Date: Thu, 4 Mar 2021 11:49:00 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1 MIME-Version: 1.0 In-Reply-To: <20210219144617.4782-17-peter.maydell@linaro.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2607:f8b0:4864:20::531; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x531.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, NICE_REPLY_A=-0.001, 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: 2.1.23 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" On 2/19/21 6:45 AM, Peter Maydell wrote: > The SSE-300 has a new PWRCTRL register at offset 0x1fc (previously > reserved). This register controls accessibility of some registers > in the Power Policy Units (PPUs). Since QEMU doesn't implement > the PPUs, we don't need to implement any real behaviour for this > register, so we just handle the UNLOCK bit which controls whether > writes to the register itself are permitted and otherwise make it > be reads-as-written. > > Signed-off-by: Peter Maydell > --- Reviewed-by: Richard Henderson r~