From patchwork Wed Dec 21 17:30:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gatien CHEVALLIER X-Patchwork-Id: 13079001 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 45612C4332F for ; Wed, 21 Dec 2022 17:33:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=bhsrcp644Q1VdLUb61qGKu/C7HdYnISR60qR4oqboOg=; b=qdVc8JMIgOyEKj BkB5lkORW5XFbiU2EORx+KsStN1pyDivjdarxSIsBh/qWqQICp3CR2HA4roIXM/h13mSpMjBSpfqm 5ajCwZNgc/lXIdorT5BmWwcgMFVQGUSRgW/+/XC6Ecv+ooxXrVMwtsnJWo89MZR0X+MBvh03B4l+V jlhmvnkZ7KqrsJPYyfY6TFOkxDP73JRiajh5BJYWgPGFu/dWWXHUeHZBS8tHpxI6XH1nTyVt29rjE /mXiQh5R2DljbkRxd5U7g8vfZCcwsEsQcoDnqd2W8PjdWF3NXG2s8+JIinMas7UP9EvxFiDD1XgH+ DUtBso2VqhnfKFAc4YDg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1p82ww-00HVfK-0c; Wed, 21 Dec 2022 17:32:14 +0000 Received: from mx07-00178001.pphosted.com ([185.132.182.106]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1p82ws-00HVbD-Ak for linux-arm-kernel@lists.infradead.org; Wed, 21 Dec 2022 17:32:12 +0000 Received: from pps.filterd (m0288072.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 2BLDfXUF027409; Wed, 21 Dec 2022 18:31:48 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding : content-type; s=selector1; bh=Zc9Ksvhd8I8nNJuzji2oJDe/YDaWLwaSBoVwQrKbn5w=; b=B6NHKBaI72SbORUCei5gjyMaTQQfN2wSc92Hlku3tMJocQx0QtkYjFo+w49hh3hF0Apb 6lZfyDXORK6eOd6oRfl6v46EQi9pEVHq1/YbyMZQKUw1d0pEmBoTxjJP2TBtAGrw/yYH 0ZuU+wiNNXBDfdR7GKsV9O87Zj26t7RSRwimoTRUQ3zCprvnZGqumSBjn/p5NvPuqpPi 27jscN/i/kYKW50O2ZI2Pw43c0/8RWTTBapOrN60UfuPbDfZ03igOTP0BagbaqATla4K MPDKD4YeAV74bEhO/OsF7AqSB53NFcYyQ8uvS5h2nWdJpIYXEB0QLGoU0j7FwoiKei2j EQ== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 3mh42prmyv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 21 Dec 2022 18:31:47 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 3E24310003A; Wed, 21 Dec 2022 18:31:42 +0100 (CET) Received: from Webmail-eu.st.com (shfdag1node1.st.com [10.75.129.69]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id D78DF232FEC; Wed, 21 Dec 2022 18:31:09 +0100 (CET) Received: from localhost (10.201.21.217) by SHFDAG1NODE1.st.com (10.75.129.69) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.13; Wed, 21 Dec 2022 18:31:09 +0100 From: Gatien Chevallier To: , , , , CC: , , , , , , , Subject: [RFC PATCH 0/7] Introduce STM32 system bus Date: Wed, 21 Dec 2022 18:30:48 +0100 Message-ID: <20221221173055.11719-1-gatien.chevallier@foss.st.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [10.201.21.217] X-ClientProxiedBy: EQNCAS1NODE4.st.com (10.75.129.82) To SHFDAG1NODE1.st.com (10.75.129.69) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.923,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-12-21_10,2022-12-21_01,2022-06-22_01 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221221_093210_905592_C8DED2AB X-CRM114-Status: GOOD ( 17.98 ) 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 Document STM32 System Bus. This bus is intended to control firewall access for the peripherals connected to it. For every peripheral, the bus checks the firewall registers to see if the peripheral is configured as non-secure. If the peripheral is configured as secure, the node is marked populated, so the device won't be probed. This is useful as a firewall configuration sanity check and avoid platform crashes in case peripherals are incorrectly configured. The STM32 System Bus implements the feature-domain-controller bindings. It is used by peripherals to reference a domain controller, in this case the firewall feature domain. The bus uses the ID referenced by the feature-domains property to know where to look in the firewall to get the security configuration for the peripheral. This allows a device tree description rather than a hardcoded peripheral table in the bus driver. On STM32MP13/15 platforms, the firewall bus is represented by the ETZPC node, which is responsible for the securing / MCU isolating the capable peripherals. STM32MP13/15 device trees are updated in this series to implement the bus. All peripherals that are securable or MCU isolation capable by the ETZPC are connected to the bus. Gatien Chevallier (6): dt-bindings: bus: add STM32 System Bus dt-bindings: bus: add STM32MP15 ETZPC firewall bus bindings dt-bindings: bus: add STM32MP13 ETZPC firewall bus bindings bus: stm32_sys_bus: add support for STM32MP15 and STM32MP13 system bus ARM: dts: stm32: add ETZPC as a system bus for STM32MP15x boards ARM: dts: stm32: add ETZPC as a system bus for STM32MP13x boards Oleksii Moisieiev (1): dt-bindings: Document common device controller bindings .../devicetree/bindings/bus/st,sys-bus.yaml | 88 + .../feature-domain-controller.yaml | 84 + MAINTAINERS | 6 + arch/arm/boot/dts/stm32mp131.dtsi | 242 +- arch/arm/boot/dts/stm32mp151.dtsi | 2737 +++++++++-------- drivers/bus/Kconfig | 9 + drivers/bus/Makefile | 1 + drivers/bus/stm32_sys_bus.c | 180 ++ include/dt-bindings/bus/stm32mp13_sys_bus.h | 60 + include/dt-bindings/bus/stm32mp15_sys_bus.h | 98 + 10 files changed, 2062 insertions(+), 1443 deletions(-) create mode 100644 Documentation/devicetree/bindings/bus/st,sys-bus.yaml create mode 100644 Documentation/devicetree/bindings/feature-controllers/feature-domain-controller.yaml create mode 100644 drivers/bus/stm32_sys_bus.c create mode 100644 include/dt-bindings/bus/stm32mp13_sys_bus.h create mode 100644 include/dt-bindings/bus/stm32mp15_sys_bus.h