From patchwork Fri Aug 11 10:07:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gatien Chevallier X-Patchwork-Id: 13350475 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 66A7CC0015E for ; Fri, 11 Aug 2023 10:09:06 +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:References:In-Reply-To: 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: List-Owner; bh=B+asiyK7E38n87B69aQVO/LP8f/vO85pU4lyM8JM/9A=; b=zNwUICVBUcFvMH v5xeq30vu7oUdYXZ799OZUiNAR1Yje7aob6+3h5lS/0JHFMqHHxoU6pHDXRDPoj27JUAObXBjgRpi dTBe5v4Gvo3kze31zrXjiLw9hbHQY2AvUn3R/7g+m87AdgkAHBPHwgFfWg+o9o7Mr+Q1TWTsa3z1V dk3wyaEB7mfPGjfOfBrSglRho8ZjfxBHzbW5ql/0VRzlGdzFEAoISILcO9DvtB7jfY2q+B8ireHOD bWBkoOL4fYe2Ve7vH0VtO/z5F3rsRGsz+oUQKYhPVduS2Swp3w0LEjwDIJ4ARVdse56ghKZp25GxD u/V2exbjnPT33r4pHGeg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qUP4L-00A5ZA-0m; Fri, 11 Aug 2023 10:08:33 +0000 Received: from mx07-00178001.pphosted.com ([185.132.182.106]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qUP4C-00A5Va-2A; Fri, 11 Aug 2023 10:08:27 +0000 Received: from pps.filterd (m0241204.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.17.1.22/8.17.1.22) with ESMTP id 37B72jef008118; Fri, 11 Aug 2023 12:07:44 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding:content-type; s= selector1; bh=+UNuTiEun7FhBdsfcJqf/qnk8DNj8pRVH/wzdvv/e68=; b=LU 6RvEGiWjfTS5SQ1hzOvgyC9i3pIRfWwyGeWwk6cs17GkbGoMqtnrFTs/Gkcs7hB7 RJGWWjhcGTLUj3aZ7Jd/bRq9Hg7CZlpiMS80w58RL8hvUvLrtTpYgu6HtCWCWD/J b9c27Rsix2P8RHB8sMHVQ+tJEo0vbWMK/5pBQwAnY43y49xhAH2x94MWvGIlv8zp euHeaPGsZaKT/cgERxmR8hE5/BP2KMo6RWkXGlynlmsvo0RATv4tvR1TSuhDL3si +vx/FnRdjpoL5NbKdyh5ydF4VnV6JdaxTK+7ZjnCdPGkq0CG3crrpqYceQX8327c RlcnomF/M/DeFvVvzMow== 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 3sd9jrtyf3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 11 Aug 2023 12:07:44 +0200 (MEST) Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 6065B100058; Fri, 11 Aug 2023 12:07:43 +0200 (CEST) Received: from Webmail-eu.st.com (eqndag1node4.st.com [10.75.129.133]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 563362138F9; Fri, 11 Aug 2023 12:07:43 +0200 (CEST) Received: from localhost (10.201.21.121) 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 15.1.2507.21; Fri, 11 Aug 2023 12:07:42 +0200 From: Gatien Chevallier To: , , , , , , , , , , , , , , , , , , , , , , , , , Frank Rowand , CC: , , , , , , , , , , , , , , , , Gatien Chevallier Subject: [PATCH v4 03/11] dt-bindings: bus: document RIFSC Date: Fri, 11 Aug 2023 12:07:23 +0200 Message-ID: <20230811100731.108145-4-gatien.chevallier@foss.st.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230811100731.108145-1-gatien.chevallier@foss.st.com> References: <20230811100731.108145-1-gatien.chevallier@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.21.121] X-ClientProxiedBy: EQNCAS1NODE4.st.com (10.75.129.82) To EQNDAG1NODE4.st.com (10.75.129.133) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-08-10_20,2023-08-10_01,2023-05-22_02 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230811_030825_041023_24856446 X-CRM114-Status: GOOD ( 15.36 ) 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 RIFSC (RIF security controller). RIFSC is a firewall controller composed of different kinds of hardware resources. Signed-off-by: Gatien Chevallier --- Changes in V2: - Corrected errors highlighted by Rob's robot - No longer define the maxItems for the "feature-domains" property - Fix example (node name, status) - Declare "feature-domain-names" as an optional property for child nodes - Fix description of "feature-domains" property .../bindings/bus/st,stm32mp25-rifsc.yaml | 105 ++++++++++++++++++ 1 file changed, 105 insertions(+) create mode 100644 Documentation/devicetree/bindings/bus/st,stm32mp25-rifsc.yaml diff --git a/Documentation/devicetree/bindings/bus/st,stm32mp25-rifsc.yaml b/Documentation/devicetree/bindings/bus/st,stm32mp25-rifsc.yaml new file mode 100644 index 000000000000..7aeb38296616 --- /dev/null +++ b/Documentation/devicetree/bindings/bus/st,stm32mp25-rifsc.yaml @@ -0,0 +1,105 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/bus/st,stm32mp25-rifsc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: STM32 Resource isolation framework security controller + +maintainers: + - Gatien Chevallier + +description: | + Resource isolation framework (RIF) is a comprehensive set of hardware blocks + designed to enforce and manage isolation of STM32 hardware resources like + memory and peripherals. + + The RIFSC (RIF security controller) is composed of three sets of registers, + each managing a specific set of hardware resources: + - RISC registers associated with RISUP logic (resource isolation device unit + for peripherals), assign all non-RIF aware peripherals to zero, one or + any security domains (secure, privilege, compartment). + - RIMC registers: associated with RIMU logic (resource isolation master + unit), assign all non RIF-aware bus master to one security domain by + setting secure, privileged and compartment information on the system bus. + Alternatively, the RISUP logic controlling the device port access to a + peripheral can assign target bus attributes to this peripheral master port + (supported attribute: CID). + - RISC registers associated with RISAL logic (resource isolation device unit + for address space - Lite version), assign address space subregions to one + security domains (secure, privilege, compartment). + +properties: + compatible: + contains: + const: st,stm32mp25-rifsc + + reg: + maxItems: 1 + + "#address-cells": + const: 1 + + "#size-cells": + const: 1 + + ranges: true + + "#feature-domain-cells": + const: 1 + + feature-domain-controller: true + +patternProperties: + "^.*@[0-9a-f]+$": + description: Peripherals + type: object + properties: + feature-domains: + minItems: 1 + description: + The phandle of the firewall controller of the peripheral and the + platform-specific firewall ID of the peripheral. + + feature-domain-names: + minItems: 1 + + required: + - feature-domains + +required: + - compatible + - reg + - "#address-cells" + - "#size-cells" + - feature-domain-controller + - "#feature-domain-cells" + - ranges + +additionalProperties: false + +examples: + - | + // In this example, the usart2 device refers to rifsc as its domain + // controller. + // Access rights are verified before creating devices. + + #include + + rifsc: bus@42080000 { + compatible = "st,stm32mp25-rifsc"; + reg = <0x42080000 0x1000>; + #address-cells = <1>; + #size-cells = <1>; + feature-domain-controller; + #feature-domain-cells = <1>; + ranges; + + usart2: serial@400e0000 { + compatible = "st,stm32h7-uart"; + reg = <0x400e0000 0x400>; + interrupts = ; + clocks = <&ck_flexgen_08>; + feature-domains = <&rifsc 32>; + }; + };