From patchwork Tue Mar 25 09:58:33 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaud Pouliquen X-Patchwork-Id: 14028270 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 9561F19DF41; Tue, 25 Mar 2025 10:00:54 +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=1742896856; cv=none; b=KENr6KGnMPGf//vQ89yZIB0T6yqXOIgACSRtWCvp0ulfIT65q10H9DlHqcvAPrqsXcRylo528ZEESKEn7jpOUGEFkoxd+Uk1chwoVIhM5DAYx68dASz0wC6S4eXDd0aRa2EcqTvHSlTOG9S1uVB8Yb3VHut3+h1hl9HViscldec= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742896856; c=relaxed/simple; bh=igekjCIzFUKZGrRB+EkOmSens6K5uj+qboqe50srDbY=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=XkZ054SqzdvDcWJ7DiT9xBaqOFFzIvkjS+uQLfTlUG0fVSOwM+KZF5jE9UxgtZ4Tr371Pcdov6Z8qHJnO3v5+TSo34W8bWqRjZXaPW6mP4GdpPHqeZE3SGDIY+ZjnWDmaAXSkO0DixE5kJ+J4ZUfh8p9ZAEoY8Jn83eWCK3LerQ= 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=ntT2dXRX; 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="ntT2dXRX" 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 52P8RcU0021441; Tue, 25 Mar 2025 11:00:38 +0100 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= SXuU2hE9lez0o4MRkVxU/IR3ZVqWEib1TZPw4EpsY6I=; b=ntT2dXRXMX4D9ZES C6eZJ1LGZbabVFMYJWOChRR9VkSxLuPWAUhrY2NsNCcGQdrkbbYD9A1V6SEZppcE vgEYYFRm+JTilgcmsMSdOBpix8EmGhj+5NqxdHk0qkKTGXspxc4O8cZjRZKMX+WF nygPi14mykLeLtQHOjNTVRHNpFL6mlH+LGLL6WbeQMHjGa47e370rZxR23zfoDy6 gobuvLnB8VVmsdIL6Yf29jxhY2o9TOzAXnXipNv9vciDBDGFq1kCAONc2rYBvICw XRN5vgKic+Hnte2MhMqMkKKqIla2hdsSX6BaJNMjJR93sFo9rSBk0DP86ar0t5oA hUel/w== 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 45hk7d3yg4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 25 Mar 2025 11:00:38 +0100 (CET) Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-ap.st.com (STMicroelectronics) with ESMTP id DEFE34004B; Tue, 25 Mar 2025 10:59:31 +0100 (CET) Received: from Webmail-eu.st.com (eqndag1node4.st.com [10.75.129.133]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 2ACE58239C4; Tue, 25 Mar 2025 10:58:50 +0100 (CET) Received: from SAFDAG1NODE1.st.com (10.75.90.17) by EQNDAG1NODE4.st.com (10.75.129.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Tue, 25 Mar 2025 10:58:50 +0100 Received: from localhost (10.252.12.99) 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 15.1.2507.39; Tue, 25 Mar 2025 10:58:49 +0100 From: Arnaud Pouliquen To: Bjorn Andersson , Mathieu Poirier , Jens Wiklander , "Rob Herring" , Krzysztof Kozlowski , Conor Dooley CC: , , , , , , Arnaud Pouliquen Subject: [PATCH v16 6/6] remoteproc: stm32: Add support of an OP-TEE TA to load the firmware Date: Tue, 25 Mar 2025 10:58:33 +0100 Message-ID: <20250325095833.3059895-7-arnaud.pouliquen@foss.st.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250325095833.3059895-1-arnaud.pouliquen@foss.st.com> References: <20250325095833.3059895-1-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: SAFCAS1NODE1.st.com (10.75.90.11) To SAFDAG1NODE1.st.com (10.75.90.17) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1093,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-03-25_04,2025-03-25_01,2024-11-22_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 | 57 ++++++++++++++++++++++++++++++-- 1 file changed, 54 insertions(+), 3 deletions(-) diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c index b1bda314ca85..829dfd440dbf 100644 --- a/drivers/remoteproc/stm32_rproc.c +++ b/drivers/remoteproc/stm32_rproc.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include #include @@ -255,6 +256,19 @@ 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 = rproc_tee_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; @@ -691,8 +705,20 @@ 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 = rproc_tee_start, + .stop = stm32_rproc_tee_stop, + .kick = stm32_rproc_kick, + .load = rproc_tee_load_fw, + .parse_fw = rproc_tee_parse_fw, + .find_loaded_rsc_table = rproc_tee_find_loaded_rsc_table, + .release_fw = rproc_tee_release_fw, +}; + 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); @@ -853,15 +879,36 @@ static int stm32_rproc_probe(struct platform_device *pdev) struct device_node *np = dev->of_node; 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; + + ret = rproc_tee_register(dev, rproc, proc_id); + if (ret) + return dev_err_probe(dev, ret, "signed firmware not supported by TEE\n"); + } else { + rproc = devm_rproc_alloc(dev, np->name, &st_rproc_ops, NULL, sizeof(*ddata)); + if (!rproc) + return -ENOMEM; + } ddata = rproc->priv; @@ -913,6 +960,8 @@ static int stm32_rproc_probe(struct platform_device *pdev) dev_pm_clear_wake_irq(dev); device_init_wakeup(dev, false); } + rproc_tee_unregister(dev, rproc); + return ret; } @@ -933,6 +982,8 @@ static void stm32_rproc_remove(struct platform_device *pdev) dev_pm_clear_wake_irq(dev); device_init_wakeup(dev, false); } + + rproc_tee_unregister(dev, rproc); } static int stm32_rproc_suspend(struct device *dev)