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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EAD0BC2D0C5 for ; Mon, 9 Dec 2019 18:12:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BBFAD24654 for ; Mon, 9 Dec 2019 18:12:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="Tts/uxwA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726665AbfLISMB (ORCPT ); Mon, 9 Dec 2019 13:12:01 -0500 Received: from mail-wr1-f65.google.com ([209.85.221.65]:35984 "EHLO mail-wr1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726642AbfLISMA (ORCPT ); Mon, 9 Dec 2019 13:12:00 -0500 Received: by mail-wr1-f65.google.com with SMTP id z3so17304796wru.3 for ; Mon, 09 Dec 2019 10:11:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=KOPwmsVGim8uksddBYEL5Xr/XEk+fQ6sygiouqBeFpU=; b=Tts/uxwAulwDWx38JQ7vQN1vchjW9BMQPwqFcz5u8er0ybt0fOUvBHt+WEAB24gXyc BlO6xJwA59upCQs0IseN693yMmNMgDbbFgWrWiT8ZWofkwrA7Seq9O/D4Gx//cyDdaGE /guIbq5MoYH70/5n63vUCderClZlhJs3YBa2U9WpDRuoNG3S47hAE8+Ww4p9KU6i+ziJ sceo5n1ghS7WbisS3mMyOWUi5Kf2+viwAkPdhnJOYSbUXUfLBHgRWi46jnVUHnae9E52 Wr8TWOQ6BMPwQ+bvP0D1ypo0U6Cun3Y1noijEKy7UPoDC+Idhr8iP2SN8THAoGBBnKww bVHQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=KOPwmsVGim8uksddBYEL5Xr/XEk+fQ6sygiouqBeFpU=; b=INx8aihpZviY914EnDf62PNXuJeu4n41JNvNDdzS3GRtdK+UL38Vn0gYL5NGYxSIUk xX2F3jDii2UTeYGjXnjy2DUl1LkljtcEgA286MqlAgohIslxDQguOr7YcQ6Rn6aDwJmN jnfXz3AcAd7aZbHCZHC+JQPunkPoJDajZ0IZgfCFclIgHuLF/dehosG6uCDagkdO+oUs jH8EflqoxI2DT5V5eWcmvso0IitDwSYBSrwVCuephUt4X+PelZf2tbfD1Yx9olmGY8H5 lCHAP/9SB6pucqy06V5rVgBmn35GrrEPwL8HQYts33vURM8ZL4fxhW/B9DLQJt6+j417 ZI/w== X-Gm-Message-State: APjAAAVpK1AWkxqqiFXYfok45TdmUAGQzEEQdEVgmZzlqAUcJ0oi1fyy onqKho+p1fbhI3XFmBzcY3b8hQ== X-Google-Smtp-Source: APXvYqwd75VErNxunler74D2aYIuUwxtIPPyshTDCbkZm56YpyIMcPHPAkjo50SdxP2In7GjOAaXhw== X-Received: by 2002:adf:f581:: with SMTP id f1mr3704624wro.264.1575915118236; Mon, 09 Dec 2019 10:11:58 -0800 (PST) Received: from localhost.localdomain (adsl-62-167-101-88.adslplus.ch. [62.167.101.88]) by smtp.gmail.com with ESMTPSA id h2sm309838wrv.66.2019.12.09.10.11.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Dec 2019 10:11:57 -0800 (PST) From: Jean-Philippe Brucker To: linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, devicetree@vger.kernel.org, iommu@lists.linux-foundation.org Cc: joro@8bytes.org, robh+dt@kernel.org, mark.rutland@arm.com, lorenzo.pieralisi@arm.com, guohanjun@huawei.com, sudeep.holla@arm.com, rjw@rjwysocki.net, lenb@kernel.org, will@kernel.org, robin.murphy@arm.com, bhelgaas@google.com, eric.auger@redhat.com, jonathan.cameron@huawei.com, zhangfei.gao@linaro.org Subject: [PATCH v3 02/13] dt-bindings: document PASID property for IOMMU masters Date: Mon, 9 Dec 2019 19:05:03 +0100 Message-Id: <20191209180514.272727-3-jean-philippe@linaro.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191209180514.272727-1-jean-philippe@linaro.org> References: <20191209180514.272727-1-jean-philippe@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org On Arm systems, some platform devices behind an SMMU may support the PASID feature, which offers multiple address space. Let the firmware tell us when a device supports PASID. Reviewed-by: Rob Herring Reviewed-by: Eric Auger Signed-off-by: Jean-Philippe Brucker --- Documentation/devicetree/bindings/iommu/iommu.txt | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/iommu/iommu.txt b/Documentation/devicetree/bindings/iommu/iommu.txt index 5a8b4624defc..3c36334e4f94 100644 --- a/Documentation/devicetree/bindings/iommu/iommu.txt +++ b/Documentation/devicetree/bindings/iommu/iommu.txt @@ -86,6 +86,12 @@ have a means to turn off translation. But it is invalid in such cases to disable the IOMMU's device tree node in the first place because it would prevent any driver from properly setting up the translations. +Optional properties: +-------------------- +- pasid-num-bits: Some masters support multiple address spaces for DMA, by + tagging DMA transactions with an address space identifier. By default, + this is 0, which means that the device only has one address space. + Notes: ====== -- 2.24.0