Received: by 2002:a6b:500f:0:0:0:0:0 with SMTP id e15csp2766660iob; Fri, 6 May 2022 09:57:47 -0700 (PDT) X-Google-Smtp-Source: ABdhPJz6iKCOpTfFTCbfG8+6GRj/tVbSN6RISlyC0W4uf6dKje4ptQdkhfChG89t7F9o2b9Or434 X-Received: by 2002:a17:903:110e:b0:15e:f450:bee8 with SMTP id n14-20020a170903110e00b0015ef450bee8mr1505989plh.136.1651856267680; Fri, 06 May 2022 09:57:47 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1651856267; cv=none; d=google.com; s=arc-20160816; b=b0QMD+jH+/+9OcW7iY4NNFA8SJhTLOFToYOMcBm3GDWyE+e/KVmgknRwu4HtjMmT22 aoo5b7FN2E4RPZPkFjQL6THSdQjAqRq2rP9/55VSYyWm6PF2u9aGgwBbeM89HVu28c0E Q7u9czDpEg6hdbYOrYmhRvwj+sl9onqW6ucc/ql/aY9HzgEqskbOMlLUWUa157oZQvZN GdnNcZ6Bo7NaEeHDb/H1SBvulqGuKWnZw0xR2w4rUi90pKMtw1OUTydU6nmCDRTNJqlB gBwVJ6j3h/gYwZkXL5Zb3W1cqIv6MehHutoMELbr6BYUR04yjCTKanyyezyaNUmTIC0n y4RA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:subject:message-id:date:from:in-reply-to :references:mime-version:dkim-signature; bh=zqlpLuQfBXsLF0pGTV7F8Lqm0D+MDLdu0OmDcVtwIY4=; b=lwmnwgKIlhBjfMfCF2axvB+E2El4vf72mCXSQR8GD+E/hrpCeGn0UU7kwFWmcrVw+3 LFxhuWhJmF30XAz9/buQDg5NN57UMjm5YWUDuKga/DRROQbqcFpC6vjuAwSl5/XcSQng o7fZ1T0H7Dp3UjxXNmhK9Kc/JaGYgXyPAk3KEW/0gHlOxipkDPmOqhQzbUi8yhM2GrFA soUl9pK92l63DbuYbx1Q/8h6nAV7wFKQW/+TUJJZ1VgZ1Q0EkRpO+UoD+QLN6p1TdMpG l4Dfi0VBYraM7CM7KBRzQNVm7IWUi8CwpzVBSrz90Qjqd+x4r97kgCgw0a13hNmGzGHA 9oIg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b="uOk/SO4P"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id t10-20020a170902e84a00b00153f463a7e2si2936823plg.126.2022.05.06.09.57.30; Fri, 06 May 2022 09:57:47 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b="uOk/SO4P"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230404AbiEDWIS (ORCPT + 99 others); Wed, 4 May 2022 18:08:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59706 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238158AbiEDWIP (ORCPT ); Wed, 4 May 2022 18:08:15 -0400 Received: from mail-yw1-x1131.google.com (mail-yw1-x1131.google.com [IPv6:2607:f8b0:4864:20::1131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 253D550E1A for ; Wed, 4 May 2022 15:04:38 -0700 (PDT) Received: by mail-yw1-x1131.google.com with SMTP id 00721157ae682-2f863469afbso31085447b3.0 for ; Wed, 04 May 2022 15:04:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=zqlpLuQfBXsLF0pGTV7F8Lqm0D+MDLdu0OmDcVtwIY4=; b=uOk/SO4PYBMT+8q1dA1TD5ptS5xd/kbbzQLYE6iespzhwRZycMKu5S3Qhyiz6F+i+1 3cOJMgPCVoECy5RD3/Qtqqi0Dgd8cNVtxDpH7cyysA9bWJtaBzWNzqAT35Kh8PpgeUp0 LEwxjERbI/QnoiGBnKxyEE3BpPH5Cdrf+zKObdobq0SKBeWIaWkut6AZ2IU6fQ/sYQ6c nTwHHjF0AO+2SNGg7wY3qPOsZREgDpQwjEuQq+eL8Uzo9fApS54erILmrbEOxlBVyUSs NovjMz5MjUjUdq+1l8a+JM44tWm5RCCtn/vOHA36VSTza1cRyofX77vYLvS1C7rEPbK8 lHJQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=zqlpLuQfBXsLF0pGTV7F8Lqm0D+MDLdu0OmDcVtwIY4=; b=JJ3O3GpZm8P2R2FeOOud/MGRkQDGi4fO4ckJprD+J9Ips01MzwL0VMwX9F88huVqmc v1MUoImeOfj1py3ChN2UPJQ4Lh/4o3GNOwufQGqsoNZk01gB0JIbOA8fliub05+4MWVb JkLu7b6yqVvwg+wmhjaxbIM9moxhbbveN9hrbD7ICEv3AmClJxR25UAHiu6eiTw74AKV 2kfwH5U8t648FUGCEyWop75pv/8NN1Qa5MJ0WVKg4v0wT4ZPHPcN1Iv1wLLzs+GGKp+m zhLnjUUl9vwv3D3qewGxj3uY6HYzPdFL6CgjxGX/wlprzEaOTOXs94JC9rYjK3TP5qqv OVfw== X-Gm-Message-State: AOAM530Dqltox/k6wmoWSWC7nATxtXuXZWsOVvhjkbBK4ZqAKDuNIi2f +2XFS23hoZXiSVikyTvDcJ2Qv0SQeMIayrJ9eMsTSA== X-Received: by 2002:a0d:ddc6:0:b0:2f8:a506:a5c0 with SMTP id g189-20020a0dddc6000000b002f8a506a5c0mr22606554ywe.140.1651701877405; Wed, 04 May 2022 15:04:37 -0700 (PDT) MIME-Version: 1.0 References: <20220502153114.283618-1-fabien.dessenne@foss.st.com> In-Reply-To: <20220502153114.283618-1-fabien.dessenne@foss.st.com> From: Linus Walleij Date: Thu, 5 May 2022 00:04:26 +0200 Message-ID: Subject: Re: [PATCH] pinctrl: stm32: prevent the use of the secure protected pins To: Fabien Dessenne Cc: Maxime Coquelin , Alexandre Torgue , linux-gpio@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, May 2, 2022 at 5:31 PM Fabien Dessenne wrote: > The hardware denies any access from the Linux non-secure world to the > secure-protected pins. Hence, prevent any driver to request such a pin. > > Mark the secure-protected GPIO lines as invalid (.init_valid_mask) and > prevent the pinmux request / pinconf setting operations. > Identify the secure pins with "NO ACCESS" in the pinconf sysfs. > > Signed-off-by: Fabien Dessenne Patch applied! Yours, Linus Walleij