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Tue, 10 Jun 2025 09:07:39 -0700 (PDT) Received: from [192.168.1.129] ([82.79.237.69]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-60778376e48sm6305308a12.18.2025.06.10.09.07.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 10 Jun 2025 09:07:38 -0700 (PDT) Message-ID: Date: Tue, 10 Jun 2025 19:07:37 +0300 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 3/6] bus: add driver for IMX AIPSTZ bridge To: Shawn Guo Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Fabio Estevam , Daniel Baluta , Shengjiu Wang , Frank Li , Marco Felsch , Marc Kleine-Budde , Alexander Stein , Pengutronix Kernel Team , devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20250415171919.5623-1-laurentiumihalcea111@gmail.com> <20250415171919.5623-4-laurentiumihalcea111@gmail.com> Content-Language: en-US From: Laurentiu Mihalcea In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250610_090741_097153_04445711 X-CRM114-Status: GOOD ( 12.49 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 6/2/2025 7:09 AM, Shawn Guo wrote: > On Tue, Apr 15, 2025 at 01:19:16PM -0400, Laurentiu Mihalcea wrote: >> Add driver for this IP. Since there's currently no framework for >> access controllers (and since there's currently no need for having >> flexibility w.r.t the configurations) all this driver does is it >> applies a relaxed, "default" configuration, in which all masters >> are trusted for R/W. > Just out of curiosity, is there any ongoing/planned effort about creating > a framework for access controllers at all? no plan ATM. Though, I would be interested in knowing if anyone else would benefit from such an API? I know that STM also has some access controller-related drivers, but I wonder if STM's drivers and the AIPSTZ are just some isolated cases in which security-related configuration is done from EL1?