From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6F0C2C761AF for ; Wed, 5 Apr 2023 17:55:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233809AbjDERzq (ORCPT ); Wed, 5 Apr 2023 13:55:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46176 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233789AbjDERzk (ORCPT ); Wed, 5 Apr 2023 13:55:40 -0400 Received: from mail-pl1-x630.google.com (mail-pl1-x630.google.com [IPv6:2607:f8b0:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 112A55589 for ; Wed, 5 Apr 2023 10:55:22 -0700 (PDT) Received: by mail-pl1-x630.google.com with SMTP id n14so19288387plc.8 for ; Wed, 05 Apr 2023 10:55:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1680717321; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=d6KxPEHCGj+2Fji8JCae/W+Ck9cYGQv+bw6pf7dJ+WQ=; b=arzRhxzpaOtE/mwpFQDvfgOMalpHYcWt2AqgaokR5CNeTe/o5aWB42B3PC4D84dsIS c7uohGH5qf8nmsgoqTHDiFATmD0LWZeE1aFAif3R93vmMGEVQ7T8euXHEVnjt3KJI9Xj ElHl8WL9iSa0jERmPDsM96edNA+Nmfi8vnIAyQZBT4kQJydFivxCphfD87qoykZOiD4r C51rpD7JwBD39R+tUfEUfgRDlgbyb+r/aL2+MMpQCRsTvPkKipfcqhLb2HxPsVBlMTa3 t+s6YBg0yyJcTghEkERK0mHTIHaIFLc+mHWZExYVzFc8H6JgykpL0bBybpk4qVS9IeZ4 FPiQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680717321; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=d6KxPEHCGj+2Fji8JCae/W+Ck9cYGQv+bw6pf7dJ+WQ=; b=YIU2AnnKLYlO60MggQhl71FnzcdFDyiQ8kEWBcqeqIHEBVfyJ04wXiGK7gNi+aIfRb EjfkORl0xedSr+QznpFTquaMTOO5sPNmOGPofUVp+qY8w0XpwSUz0057dXW315WEagXs uUu4Ew++TBfGmnJZZb790YYCVaTMf8V6CmHMBUxJdHjqsKBl9beccctcQLuXqxIhpcD4 9QhCNyJEmYOyla0a2glOFV2aWC2SRZphaDOa8CA5x8hwFP4E/trmiVcY5V4F9x3Glk11 Ea1USfwWjMsuZjIJWo5hH3gjrTfTKBin/iZeH14o8ncY2CfKkh/8kpZEzy1EklZlxeMf GS5Q== X-Gm-Message-State: AAQBX9d5dTqBvxpUj1UkjxeFta9A7MWecTSYvroLEWrOeqk/77VmIfHc 8bThpxjXiMCpHkTftTs1YjwMYA== X-Google-Smtp-Source: AKy350YETHBPS77VZrV0ie2wH9Ou5p0HR+/EmUhx9BAxw/aJ3bY42nyI0GxFakCeEFVsua5Zxms/wg== X-Received: by 2002:a17:903:2946:b0:19d:138b:7c4a with SMTP id li6-20020a170903294600b0019d138b7c4amr6601037plb.3.1680717321492; Wed, 05 Apr 2023 10:55:21 -0700 (PDT) Received: from p14s ([2604:3d09:148c:c800:c807:a26a:a179:b5ec]) by smtp.gmail.com with ESMTPSA id s37-20020a63ff65000000b0050f7208b4bcsm9536794pgk.89.2023.04.05.10.55.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Apr 2023 10:55:21 -0700 (PDT) Date: Wed, 5 Apr 2023 11:55:18 -0600 From: Mathieu Poirier To: Arnaud Pouliquen Cc: Bjorn Andersson , Rob Herring , Krzysztof Kozlowski , Alexandre Torgue , linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, devicetree@vger.kernel.org Subject: Re: [PATCH 3/5] remoteproc: stm32: Clean-up the management of the hold boot by SMC call Message-ID: <20230405175518.GC3812912@p14s> References: <20230331154651.3107173-1-arnaud.pouliquen@foss.st.com> <20230331154651.3107173-4-arnaud.pouliquen@foss.st.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230331154651.3107173-4-arnaud.pouliquen@foss.st.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Arnaud, On Fri, Mar 31, 2023 at 05:46:49PM +0200, Arnaud Pouliquen wrote: > There are two ways to manage the Cortex-M4 hold boot: > - by Linux thanks to a sys config controller > - by the secure context when the hold boot is protected. > Since the introduction of the SCMI server, the use of the SMC call What SCMI server? Does this means stm32 is now able to use SCMI to manage the remote processor hold boot? If so, that is what I should find in this changelog. Otherwise this changelog needs to be re-written. > is deprecated. If the trust zone is activated, the management of the > hold boot must be done by the secure context thanks to a SCMI reset > controller. > > This patch cleans-up the code related to the SMC call, replaced by > the SCMI server. > > Signed-off-by: Arnaud Pouliquen > --- > drivers/remoteproc/stm32_rproc.c | 34 ++------------------------------ > 1 file changed, 2 insertions(+), 32 deletions(-) > > diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c > index 7d782ed9e589..4be651e734ee 100644 > --- a/drivers/remoteproc/stm32_rproc.c > +++ b/drivers/remoteproc/stm32_rproc.c > @@ -5,7 +5,6 @@ > * Fabien Dessenne for STMicroelectronics. > */ > > -#include > #include > #include > #include > @@ -88,7 +87,6 @@ struct stm32_rproc { > struct stm32_rproc_mem *rmems; > struct stm32_mbox mb[MBOX_NB_MBX]; > struct workqueue_struct *workqueue; > - bool secured_soc; > void __iomem *rsc_va; > }; > > @@ -398,20 +396,12 @@ static int stm32_rproc_set_hold_boot(struct rproc *rproc, bool hold) > { > struct stm32_rproc *ddata = rproc->priv; > struct stm32_syscon hold_boot = ddata->hold_boot; > - struct arm_smccc_res smc_res; > int val, err; > > val = hold ? HOLD_BOOT : RELEASE_BOOT; > > - if (IS_ENABLED(CONFIG_HAVE_ARM_SMCCC) && ddata->secured_soc) { > - arm_smccc_smc(STM32_SMC_RCC, STM32_SMC_REG_WRITE, > - hold_boot.reg, val, 0, 0, 0, 0, &smc_res); > - err = smc_res.a0; > - } else { > - err = regmap_update_bits(hold_boot.map, hold_boot.reg, > - hold_boot.mask, val); > - } > - > + err = regmap_update_bits(hold_boot.map, hold_boot.reg, > + hold_boot.mask, val); > if (err) > dev_err(&rproc->dev, "failed to set hold boot\n"); > > @@ -680,8 +670,6 @@ static int stm32_rproc_parse_dt(struct platform_device *pdev, > { > struct device *dev = &pdev->dev; > struct device_node *np = dev->of_node; > - struct stm32_syscon tz; > - unsigned int tzen; > int err, irq; > > irq = platform_get_irq(pdev, 0); > @@ -710,24 +698,6 @@ static int stm32_rproc_parse_dt(struct platform_device *pdev, > return dev_err_probe(dev, PTR_ERR(ddata->rst), > "failed to get mcu_reset\n"); > > - /* > - * if platform is secured the hold boot bit must be written by > - * smc call and read normally. > - * if not secure the hold boot bit could be read/write normally > - */ > - err = stm32_rproc_get_syscon(np, "st,syscfg-tz", &tz); > - if (err) { > - dev_err(dev, "failed to get tz syscfg\n"); > - return err; > - } If I was to do a bisect here, I would not be able to boot boards that have a trustzone. Add the new functionality and then remove the old one. > - > - err = regmap_read(tz.map, tz.reg, &tzen); > - if (err) { > - dev_err(dev, "failed to read tzen\n"); > - return err; > - } > - ddata->secured_soc = tzen & tz.mask; > - > err = stm32_rproc_get_syscon(np, "st,syscfg-holdboot", > &ddata->hold_boot); > if (err) { > -- > 2.25.1 >