From patchwork Tue Mar 16 19:16:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Philippe Brucker X-Patchwork-Id: 12143573 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 22FA3C43381 for ; Tue, 16 Mar 2021 19:19:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EEADB650D9 for ; Tue, 16 Mar 2021 19:19:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236564AbhCPTTF (ORCPT ); Tue, 16 Mar 2021 15:19:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58228 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236607AbhCPTSv (ORCPT ); Tue, 16 Mar 2021 15:18:51 -0400 Received: from mail-wm1-x332.google.com (mail-wm1-x332.google.com [IPv6:2a00:1450:4864:20::332]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6A431C061762 for ; Tue, 16 Mar 2021 12:18:39 -0700 (PDT) Received: by mail-wm1-x332.google.com with SMTP id m20-20020a7bcb940000b029010cab7e5a9fso2082985wmi.3 for ; Tue, 16 Mar 2021 12:18:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=zdXuSq1MtFWEH67XusLrQERuO71IBN9bklER821sqN8=; b=s4NVtxjbXpVnGlId4ipIw5iTpHWbiL/Y/fXzzQ9WAq1M9jTjr8hJmD+u0Y1X2a7D0d TNJp1Pog2bUKGIxCsrUlpVLY9/HVfrn6QKfZ5Rj4Dxd8AMivBRKXlXbKHbZH+P0KWOEY Sz8nGP+cJLgyR6mklJnqesgsS47g9cq9EIn/j0AoAJ0tyTbGBn8q3JTouZH41Fz4gJBS 4PpEoKbfSjoDSEnF4uqWL1STLzC5v6fT+VTAsTAD5fvQ15cdq1e6By6PtCjN91nYu6Br 2s2gl2BgknygB1PCinbKXJKkw9Sj2iIn+K4I1gbzAWXN/bz+Hmn754PN3i9NmC8jkZlI 2JVw== 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:mime-version :content-transfer-encoding; bh=zdXuSq1MtFWEH67XusLrQERuO71IBN9bklER821sqN8=; b=XfzQ25IC5w1Z5mJOe1y4um5kuMKSsqspBHCgfX72DXXzLnOjNlsaHALrZStswo8c34 4xDHdJE/BagZKnU2B+TaKbD1KEOombu0rZNRsDw+5ko76JLiQuAMC7blvl1qPumVEDBF 2yLEY9htb1inSyoa1+JMoHVTstXqA4XBfsFZtNIKkxCw80beOClh+cvQfuXp4SY9+WnD MiboDaMikopllB6AdATkM0mEwmUlNmxA1oHL6xxo4RXXQSLTILSYxw4wTB/GaSPrfCwV WTwgljvaSEYAGFwCe005jlJyaISG7sesYmLmh4G7kqFgYy7ClMa9/sENpYdqw/z5RbA6 mhwQ== X-Gm-Message-State: AOAM532ivxqW1+8ntGgQRj3PDIKv0iIs9+MyaSX+041ZKUn1k8Vk7OtZ MDBFzfcvObDk97YQkFvVgwWZuw== X-Google-Smtp-Source: ABdhPJz0jcae/+Uzho0TthFbPf4pqfFt1iIHk4l3M0JPfNdoif7RmtFH7kwM8PaGGtYtJPuUlNO8uA== X-Received: by 2002:a7b:c34a:: with SMTP id l10mr364692wmj.46.1615922318165; Tue, 16 Mar 2021 12:18:38 -0700 (PDT) Received: from localhost.localdomain ([2001:1715:4e26:a7e0:116c:c27a:3e7f:5eaf]) by smtp.gmail.com with ESMTPSA id p12sm22690438wrx.28.2021.03.16.12.18.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Mar 2021 12:18:37 -0700 (PDT) From: Jean-Philippe Brucker To: rjw@rjwysocki.net, lenb@kernel.org, joro@8bytes.org, mst@redhat.com Cc: will@kernel.org, linux-acpi@vger.kernel.org, iommu@lists.linux-foundation.org, virtualization@lists.linux-foundation.org, eric.auger@redhat.com, sebastien.boeuf@intel.com, robin.murphy@arm.com, kevin.tian@intel.com, lorenzo.pieralisi@arm.com, jean-philippe@linaro.org Subject: [PATCH 0/3] Add support for ACPI VIOT Date: Tue, 16 Mar 2021 20:16:50 +0100 Message-Id: <20210316191652.3401335-1-jean-philippe@linaro.org> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Add a driver for the ACPI VIOT table, which enables virtio-iommu on non-devicetree platforms, including x86. This series depends on the ACPICA changes of patch 1, which will be included in next release [1] and pulled into Linux. The Virtual I/O Translation table (VIOT) describes the topology of para-virtual I/O translation devices and the endpoints they manage. It was recently approved for inclusion into the ACPI standard [2]. A provisional version of the specification can be found at [3]. After discussing non-devicetree support for virtio-iommu at length [4][5][6] we concluded that it should use this new ACPI table. And for platforms that don't implement either devicetree or ACPI, a structure that uses roughly the same format [6] can be built into the device. [1] https://github.com/acpica/acpica/pull/666 [2] https://lore.kernel.org/linux-iommu/20210218233943.GH702808@redhat.com/ [3] https://jpbrucker.net/virtio-iommu/viot/viot-v9.pdf [4] https://lore.kernel.org/linux-iommu/20191122105000.800410-1-jean-philippe@linaro.org/ [5] https://lore.kernel.org/linux-iommu/20200228172537.377327-1-jean-philippe@linaro.org/ [6] https://lore.kernel.org/linux-iommu/20200821131540.2801801-1-jean-philippe@linaro.org/ Jean-Philippe Brucker (3): ACPICA: iASL: Add definitions for the VIOT table ACPI: Add driver for the VIOT table iommu/virtio: Enable x86 support drivers/acpi/Kconfig | 3 + drivers/iommu/Kconfig | 4 +- drivers/acpi/Makefile | 2 + include/acpi/actbl3.h | 67 ++++++ include/linux/acpi_viot.h | 26 +++ drivers/acpi/bus.c | 2 + drivers/acpi/scan.c | 6 + drivers/acpi/viot.c | 406 +++++++++++++++++++++++++++++++++++ drivers/iommu/virtio-iommu.c | 3 + MAINTAINERS | 8 + 10 files changed, 526 insertions(+), 1 deletion(-) create mode 100644 include/linux/acpi_viot.h create mode 100644 drivers/acpi/viot.c