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Mon, 18 Aug 2025 15:33:03 -0700 (PDT) Received: from [192.168.1.104] ([206.83.122.207]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-b472d735e83sm9076624a12.33.2025.08.18.15.33.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 18 Aug 2025 15:33:03 -0700 (PDT) Message-ID: Date: Tue, 19 Aug 2025 08:32:57 +1000 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v9 6/6] target/arm: Enable FEAT_MEC in -cpu max To: Peter Maydell Cc: qemu-devel@nongnu.org, qemu-arm@nongnu.org, Gustavo Romero References: <20250727074202.83141-1-richard.henderson@linaro.org> <20250727074202.83141-7-richard.henderson@linaro.org> From: Richard Henderson Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2607:f8b0:4864:20::1030; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1030.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 8/18/25 23:42, Peter Maydell wrote: > Looking at this again, I don't think we should set > ID_AA64MMFR3_EL1.MEC if RME is not enabled. > > I guess the way to do this that fits in with how we > already handle "user-facing property disabled feature X > and that means we should also disable feature Y" is > to put a check in arm_cpu_realizefn() for "if RME > disabled then squash ID_AA64MMFR3.MEC to 0" ? Agreed. r~