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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 812B0C433EF for ; Mon, 30 May 2022 21:01:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243361AbiE3VBR (ORCPT ); Mon, 30 May 2022 17:01:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40958 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243259AbiE3VA7 (ORCPT ); Mon, 30 May 2022 17:00:59 -0400 Received: from mail-lf1-x12c.google.com (mail-lf1-x12c.google.com [IPv6:2a00:1450:4864:20::12c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 11854915AF for ; Mon, 30 May 2022 14:00:36 -0700 (PDT) Received: by mail-lf1-x12c.google.com with SMTP id u23so18503419lfc.1 for ; Mon, 30 May 2022 14:00:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=6yQqHGmllGTqv5b6W6sRDmvHNQ6gC3VDGqt+iST1GP4=; b=S9MQR0ujpwPcnAyQYtPOzs9RCcNptzk0O/ZMxmFkOJnlI6mtmjxlbztcN0YE14G+/O CACKu4Iom63FSxFErPfKqe3D8u1NBDzLCPW0bP4ReCA8eMTw2li9C6ziCtU4wpuuXFOv qt8hKg4Ch3uraBa6Tn2+BZTqz64LBuzU3H+Y3p7d156cESE/deH1HCsjxMQApA/hMabB SVd/urKJWwl1w0Od8Z4zjUY6waUfCEhfljhE6SeNVuuV96Jjyfsdnq6mtPjXwQC9I81N 93RwoCNTdcACEhMhE6pcdd8EPkimavXlYSfpVDIUPItTBv+rAA4J2jKLCkS4egHb/581 YKqA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=6yQqHGmllGTqv5b6W6sRDmvHNQ6gC3VDGqt+iST1GP4=; b=IHHZ8Nqp6UoWDfzWaVqpptrkVf74/blgICsdg6g7JJIR9CYG3wgamxjELzLcMoIVqF b4fKdMwFx//gKG5x/Julh9/hrdoyoNUk9RUOOoXKehGiociEUay16isesbba3reb32Z+ p7QYbIZhJIFWnf3yYlAbz6A2UgogR60LvOJuS7AGuw6rvkQZzdpbqdArHj/aNDpcoDk6 hL0HQn527SXt/mSUXcEnppP3QfcQ2nwF+plv3sojmzY1O9R3LKCGSAOEWcdON0K7XGTB EWKBdQZ3KURW9BHRhYt8gQauCRXcKWRnsz2HwjdC6j4byH426yFeAo45gCEQgH1t2FiF 0BLA== X-Gm-Message-State: AOAM533QO/8njLjf9oWF3Yv6TqrgzfC9zOziHC2Ohr+BgXF6E//cXC4I 803KGyfRrftHbh+fHiwdBdM= X-Google-Smtp-Source: ABdhPJxRI3M09HPtHmhTVLy5lEGHXzz2fTw91+bnwCJ2p93uOzuCHkjvEzV3hyRjrqV1bLRUpJbu/Q== X-Received: by 2002:a05:6512:22c2:b0:478:3ed7:f0f7 with SMTP id g2-20020a05651222c200b004783ed7f0f7mr37717893lfu.112.1653944434440; Mon, 30 May 2022 14:00:34 -0700 (PDT) Received: from otyshchenko.router ([212.22.223.21]) by smtp.gmail.com with ESMTPSA id k21-20020a2ea275000000b0025550e2693asm581541ljm.38.2022.05.30.14.00.33 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 30 May 2022 14:00:34 -0700 (PDT) From: Oleksandr Tyshchenko To: xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Oleksandr Tyshchenko , Boris Ostrovsky , Juergen Gross , Stefano Stabellini , Julien Grall , "Michael S. Tsirkin" , Christoph Hellwig Subject: [PATCH V3 8/8] arm/xen: Assign xen-grant DMA ops for xen-grant DMA devices Date: Tue, 31 May 2022 00:00:17 +0300 Message-Id: <1653944417-17168-9-git-send-email-olekstysh@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1653944417-17168-1-git-send-email-olekstysh@gmail.com> References: <1653944417-17168-1-git-send-email-olekstysh@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Oleksandr Tyshchenko By assigning xen-grant DMA ops we will restrict memory access for passed device using Xen grant mappings. This is needed for using any virtualized device (e.g. virtio) in Xen guests in a safe manner. Please note, for the virtio devices the XEN_VIRTIO config should be enabled (it forces ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS). Signed-off-by: Oleksandr Tyshchenko Reviewed-by: Stefano Stabellini --- Changes RFC -> V1: - update commit subject/description - remove #ifdef CONFIG_XEN_VIRTIO - re-organize the check taking into the account that swiotlb and virtio cases are mutually exclusive - update according to the new naming scheme: s/virtio/grant_dma Changes V1 -> V2: - add Stefano's R-b - remove arch_has_restricted_virtio_memory_access() check - update commit description - remove the inclusion of virtio_config.h Changes V2 -> V3: - no changes --- include/xen/arm/xen-ops.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/xen/arm/xen-ops.h b/include/xen/arm/xen-ops.h index 288deb1..b0766a6 100644 --- a/include/xen/arm/xen-ops.h +++ b/include/xen/arm/xen-ops.h @@ -3,11 +3,14 @@ #define _ASM_ARM_XEN_OPS_H #include +#include static inline void xen_setup_dma_ops(struct device *dev) { #ifdef CONFIG_XEN - if (xen_swiotlb_detect()) + if (xen_is_grant_dma_device(dev)) + xen_grant_setup_dma_ops(dev); + else if (xen_swiotlb_detect()) dev->dma_ops = &xen_swiotlb_dma_ops; #endif } -- 2.7.4