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=-14.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,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 425A5C4338F for ; Wed, 11 Aug 2021 02:44:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 282AF60EDF for ; Wed, 11 Aug 2021 02:44:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232354AbhHKCoe (ORCPT ); Tue, 10 Aug 2021 22:44:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35228 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231770AbhHKCoa (ORCPT ); Tue, 10 Aug 2021 22:44:30 -0400 Received: from mail-pj1-x102e.google.com (mail-pj1-x102e.google.com [IPv6:2607:f8b0:4864:20::102e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8E256C061765 for ; Tue, 10 Aug 2021 19:44:07 -0700 (PDT) Received: by mail-pj1-x102e.google.com with SMTP id lw7-20020a17090b1807b029017881cc80b7so7317842pjb.3 for ; Tue, 10 Aug 2021 19:44:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=qegFIKnQxZw4wxrrKT+itOQUvH07gg9i31emr5EQUb4=; b=RpTikaOmvpWwhBu76RwlPbsObyEP8VBGJW4O3kl7/3R7kPEt0F1chIpOfr1IjPjQBa vpanoB+b2m/11+QKLDdu4+wX35ur2FG5V/fzPTeWDmrryi4W1iBRn+DMCB6FL3kdI+Tn 0pjynKjbONb2PPmb3boUZFiwjIRHZ0pyXeizQ= 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=qegFIKnQxZw4wxrrKT+itOQUvH07gg9i31emr5EQUb4=; b=DIthkwEXRslaJuxhzdnvvJX4qm4gnFfrehXBXikeZi69m6eenTBLL3UhsB1pj0jLpf CyNjE/2NmYGrYf/BKu490HQTxqs0UPpkBzVoHd07bF0ffPZ/85dDrt0GK/tFq9cl2z4R 7iyxI+6LANl6fXI5x6mSrK2qVTmbZYv9f+sC0vC7/OOYdNLljD5fSsWczBo1WpTNAUHY FTwjRPGJCUKeIcIJxuTRvRgfW5FgPFkwoXdQQ1zVd7ueQPirWeQmx7SvXGRFyxeEFqOR Mbl032FtzvOjHPVW1KrRoYLEaJ3NQ5oh4mY5ZH/NQJe+TDaRb+xqOM1lCNX3U/vByi5R 1vHg== X-Gm-Message-State: AOAM533j5xgO6+BzLIT7GuxnWzseqNHta2XLMXq4SHtx//FsvouVObWS 41DxHgxBA7Acijg5R0XSbyQ9zA== X-Google-Smtp-Source: ABdhPJxpAtpMRVCkIy0CeKRG1iq4BSx19vJTWB5BGIzxIogqH5LE+bVlWj3wiiCx6ViPagQt5ibgjw== X-Received: by 2002:a17:90a:c8c:: with SMTP id v12mr8177299pja.37.1628649847154; Tue, 10 Aug 2021 19:44:07 -0700 (PDT) Received: from localhost ([2401:fa00:8f:203:1e5c:70cb:3289:1b5b]) by smtp.gmail.com with UTF8SMTPSA id t9sm32800688pgc.81.2021.08.10.19.44.05 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 10 Aug 2021 19:44:06 -0700 (PDT) From: David Stevens X-Google-Original-From: David Stevens To: Robin Murphy , Will Deacon Cc: Joerg Roedel , Lu Baolu , Tom Murphy , iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, David Stevens Subject: [PATCH v3 0/5] Fixes for dma-iommu swiotlb bounce buffers Date: Wed, 11 Aug 2021 11:42:42 +0900 Message-Id: <20210811024247.1144246-1-stevensd@google.com> X-Mailer: git-send-email 2.32.0.605.g8dce9f2422-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: David Stevens This patch set includes various fixes for dma-iommu's swiotlb bounce buffers for untrusted devices. There are three fixes for correctness issues, one performance issue, and one general cleanup. The min_align_mask issue was found when running fio on an untrusted nvme device with bs=512. The other issues were found via code inspection, so I don't have any specific use cases where things were not working, nor any concrete performance numbers. v2 -> v3: - Add new patch to address min_align_mask bug - Set SKIP_CPU_SYNC flag after syncing in map/unmap - Properly call arch_sync_dma_for_cpu in iommu_dma_sync_sg_for_cpu v1 -> v2: - Split fixes into dedicated patches - Less invasive changes to fix arch_sync when mapping - Leave dev_is_untrusted check for strict iommu David Stevens (5): dma-iommu: fix sync_sg with swiotlb dma-iommu: fix arch_sync_dma for map dma-iommu: add SKIP_CPU_SYNC after syncing dma-iommu: Check CONFIG_SWIOTLB more broadly dma-iommu: account for min_align_mask drivers/iommu/dma-iommu.c | 97 +++++++++++++++++++++------------------ 1 file changed, 53 insertions(+), 44 deletions(-) -- 2.32.0.605.g8dce9f2422-goog