From patchwork Fri Aug 30 09:51:47 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaud POULIQUEN X-Patchwork-Id: 13784855 Received: from mx07-00178001.pphosted.com (mx08-00178001.pphosted.com [91.207.212.93]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BCCEC17C22E; Fri, 30 Aug 2024 09:53:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.207.212.93 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725011609; cv=none; b=f+1Ybh/HPhoWyHmP2NWwriFLPC2y/zd2lSSnkbJbE4tqIWEEP/E6qf9g5065Q2Ur5zVyKzlSkReuGCbisNvrQrynd1W42MCsIjbDNHTA7QxW9c0Z7WQ2uEISkxXv4ELyR6zBlqqQBFCAj9kuJdjthZgj6gKzT1OvMyfVpspBk54= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725011609; c=relaxed/simple; bh=3ofik/Dx7u2jq1dmNGJ9s3j9GmEi8eVdKnNoNZruoMI=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=fHMOrD/u+nzmLsnMWs7QuIkCOfldenWxLTBjJ/l2vsklJl+GdgpdKCv3vBl9rIRiG7aBEJ851snyJol5fe6mjFV87iESCwDf+csyKlt6dIxKSJpFxgUN8GR237yeYAJYTQwiy5Cp+7V9Ta/1nI5Oa2sLopDmcKrqmLO9Qr8umsc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=foss.st.com; spf=pass smtp.mailfrom=foss.st.com; dkim=pass (2048-bit key) header.d=foss.st.com header.i=@foss.st.com header.b=wDSd6tn/; arc=none smtp.client-ip=91.207.212.93 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=foss.st.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=foss.st.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=foss.st.com header.i=@foss.st.com header.b="wDSd6tn/" Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 47U7RFuv001710; Fri, 30 Aug 2024 11:53:14 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=selector1; bh= n1klpJyPZeBUDJnbCIwtPUP2m2MGVEou3m5PsEyRuSE=; b=wDSd6tn/RLMw7L77 WBCp569PnSRg026v16tPVDpRf6F416elRI1vuZf1asjw5VBja2+aNiNrY0U0Ow7a xL+A6J+armE1J9jFFujgrBodKxWW7kUMMIdRvlZNfhxBWjaoGBE5k/y6RRXFZiiQ FGvtKzcxjjqy4v2B94bQc2dDsVJ+cmvB7yNJqKamy9WhVsvq0Dbwjvg6P3MalXmL lK8LMyn+DmaZbRMgIDjIel4rpHed5cn2ueqITFsbEtFJwAULitswLj81dQTKRVG9 GAobBcHa3hP2D5Ui2vFNMqu3bRzl1mRWrVGiya7cDSlxqQpkN5B1cwsL4hNu1Qev WvP+9g== Received: from beta.dmz-ap.st.com (beta.dmz-ap.st.com [138.198.100.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 41b14uja1v-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 30 Aug 2024 11:53:14 +0200 (MEST) Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-ap.st.com (STMicroelectronics) with ESMTP id 5DEE240044; Fri, 30 Aug 2024 11:53:10 +0200 (CEST) Received: from Webmail-eu.st.com (eqndag1node6.st.com [10.75.129.135]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id B06A3257A80; Fri, 30 Aug 2024 11:52:20 +0200 (CEST) Received: from SAFDAG1NODE1.st.com (10.75.90.17) by EQNDAG1NODE6.st.com (10.75.129.135) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.37; Fri, 30 Aug 2024 11:52:20 +0200 Received: from localhost (10.48.86.121) by SAFDAG1NODE1.st.com (10.75.90.17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.37; Fri, 30 Aug 2024 11:52:20 +0200 From: Arnaud Pouliquen To: Bjorn Andersson , Mathieu Poirier , Jens Wiklander , "Rob Herring" , Krzysztof Kozlowski , Conor Dooley CC: , , , , , , Arnaud Pouliquen Subject: [PATCH v9 7/7] remoteproc: stm32: Add support of an OP-TEE TA to load the firmware Date: Fri, 30 Aug 2024 11:51:47 +0200 Message-ID: <20240830095147.3538047-8-arnaud.pouliquen@foss.st.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240830095147.3538047-1-arnaud.pouliquen@foss.st.com> References: <20240830095147.3538047-1-arnaud.pouliquen@foss.st.com> Precedence: bulk X-Mailing-List: linux-remoteproc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SAFCAS1NODE2.st.com (10.75.90.13) To SAFDAG1NODE1.st.com (10.75.90.17) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-08-30_04,2024-08-30_01,2024-05-17_01 The new TEE remoteproc driver is used to manage remote firmware in a secure, trusted context. The 'st,stm32mp1-m4-tee' compatibility is introduced to delegate the loading of the firmware to the trusted execution context. In such cases, the firmware should be signed and adhere to the image format defined by the TEE. Signed-off-by: Arnaud Pouliquen --- drivers/remoteproc/stm32_rproc.c | 63 ++++++++++++++++++++++++++++++-- 1 file changed, 60 insertions(+), 3 deletions(-) diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c index 79c638936163..400a7a93b1c9 100644 --- a/drivers/remoteproc/stm32_rproc.c +++ b/drivers/remoteproc/stm32_rproc.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include #include @@ -257,6 +258,19 @@ static int stm32_rproc_release(struct rproc *rproc) return 0; } +static int stm32_rproc_tee_stop(struct rproc *rproc) +{ + int err; + + stm32_rproc_request_shutdown(rproc); + + err = tee_rproc_stop(rproc); + if (err) + return err; + + return stm32_rproc_release(rproc); +} + static int stm32_rproc_prepare(struct rproc *rproc) { struct device *dev = rproc->dev.parent; @@ -693,8 +707,20 @@ static const struct rproc_ops st_rproc_ops = { .get_boot_addr = rproc_elf_get_boot_addr, }; +static const struct rproc_ops st_rproc_tee_ops = { + .prepare = stm32_rproc_prepare, + .start = tee_rproc_start, + .stop = stm32_rproc_tee_stop, + .kick = stm32_rproc_kick, + .load = tee_rproc_load_fw, + .parse_fw = tee_rproc_parse_fw, + .find_loaded_rsc_table = tee_rproc_find_loaded_rsc_table, + +}; + static const struct of_device_id stm32_rproc_match[] = { { .compatible = "st,stm32mp1-m4" }, + { .compatible = "st,stm32mp1-m4-tee" }, {}, }; MODULE_DEVICE_TABLE(of, stm32_rproc_match); @@ -853,17 +879,42 @@ static int stm32_rproc_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct stm32_rproc *ddata; struct device_node *np = dev->of_node; + struct tee_rproc *trproc = NULL; struct rproc *rproc; unsigned int state; + u32 proc_id; int ret; ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32)); if (ret) return ret; - rproc = devm_rproc_alloc(dev, np->name, &st_rproc_ops, NULL, sizeof(*ddata)); - if (!rproc) - return -ENOMEM; + if (of_device_is_compatible(np, "st,stm32mp1-m4-tee")) { + /* + * Delegate the firmware management to the secure context. + * The firmware loaded has to be signed. + */ + ret = of_property_read_u32(np, "st,proc-id", &proc_id); + if (ret) { + dev_err(dev, "failed to read st,rproc-id property\n"); + return ret; + } + + rproc = devm_rproc_alloc(dev, np->name, &st_rproc_tee_ops, NULL, sizeof(*ddata)); + if (!rproc) + return -ENOMEM; + + trproc = tee_rproc_register(dev, rproc, proc_id); + if (IS_ERR(trproc)) { + dev_err_probe(dev, PTR_ERR(trproc), + "signed firmware not supported by TEE\n"); + return PTR_ERR(trproc); + } + } else { + rproc = devm_rproc_alloc(dev, np->name, &st_rproc_ops, NULL, sizeof(*ddata)); + if (!rproc) + return -ENOMEM; + } ddata = rproc->priv; @@ -915,6 +966,9 @@ static int stm32_rproc_probe(struct platform_device *pdev) dev_pm_clear_wake_irq(dev); device_init_wakeup(dev, false); } + if (trproc) + tee_rproc_unregister(trproc); + return ret; } @@ -935,6 +989,9 @@ static void stm32_rproc_remove(struct platform_device *pdev) dev_pm_clear_wake_irq(dev); device_init_wakeup(dev, false); } + if (rproc->tee_interface) + tee_rproc_unregister(rproc->tee_interface); + } static int stm32_rproc_suspend(struct device *dev)