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([2001:8003:c020:6900:12c1:9684:874a:fb3a]) by smtp.gmail.com with ESMTPSA id w12-20020a170902e88c00b001d06df5c1absm12529753plg.86.2023.12.27.14.58.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 27 Dec 2023 14:58:04 -0800 (PST) Message-ID: <05ef6d75-de08-4892-ab3f-67243a9b0959@linaro.org> Date: Thu, 28 Dec 2023 09:57:59 +1100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 20/35] target/arm: Handle FEAT_NV page table attribute changes Content-Language: en-US To: Peter Maydell , qemu-arm@nongnu.org, qemu-devel@nongnu.org References: <20231218113305.2511480-1-peter.maydell@linaro.org> <20231218113305.2511480-21-peter.maydell@linaro.org> From: Richard Henderson In-Reply-To: <20231218113305.2511480-21-peter.maydell@linaro.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2607:f8b0:4864:20::62a; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x62a.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, T_SCC_BODY_TEXT_LINE=-0.01 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 12/18/23 22:32, Peter Maydell wrote: > FEAT_NV requires that when HCR_EL2.{NV,NV1} == {1,1} the handling > of some of the page table attribute bits changes for the EL1&0 > translation regime: > > * for block and page descriptors: > - bit [54] holds PXN, not UXN > - bit [53] is RES0, and the effective value of UXN is 0 > - bit [6], AP[1], is treated as 0 > * for table descriptors, when hierarchical permissions are enabled: > - bit [60] holds PXNTable, not UXNTable > - bit [59] is RES0 > - bit [61], APTable[0] is treated as 0 > > Implement these changes to the page table attribute handling. > > Signed-off-by: Peter Maydell > --- > target/arm/ptw.c | 21 +++++++++++++++++++++ > 1 file changed, 21 insertions(+) Reviewed-by: Richard Henderson r~