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 9479CC4167D for ; Fri, 22 Apr 2022 16:52:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1449934AbiDVQy5 (ORCPT ); Fri, 22 Apr 2022 12:54:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51872 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1449870AbiDVQyW (ORCPT ); Fri, 22 Apr 2022 12:54:22 -0400 Received: from mail-lf1-x12f.google.com (mail-lf1-x12f.google.com [IPv6:2a00:1450:4864:20::12f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 241215F8DF for ; Fri, 22 Apr 2022 09:51:28 -0700 (PDT) Received: by mail-lf1-x12f.google.com with SMTP id y32so15294301lfa.6 for ; Fri, 22 Apr 2022 09:51:28 -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=FWaKUpxpKzKjbtSZ6ZKtWz+3C1vj9orKjhUr2xwY4lM=; b=hZs3izeCtmtt43a0UNm5IqmPSa6o2CTFdv4hT95HlTt8sq4U8H2GVbe8LO7gpfIx9P nUCA0BIFr8bWe4R+3Vx5F5V5bZlcVUxVU6cfKnoKPtW9fYpu4rM0I3NA6A9jDYVP/9eT 5v6R6JbVvZdOMWrOceZlrUlagLbrTSPHZ85X9eWLHsTTCGbqBvoaWLAPWUgbs6Idby5s 4LtwH2Lnu3gjEMNKSbuabCyQMifLdMh/r+T6OpIX4rBGG1FX/6XuNg2Nq2vJTPVMJqWK NdOH6K0tTIKQxd1NLk5+6LC7bTT/3ZCxi4f0143G79Y5OyjlhU1DkqwMqAELZuYMQgwV 5rHg== 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=FWaKUpxpKzKjbtSZ6ZKtWz+3C1vj9orKjhUr2xwY4lM=; b=LlqKv4YHT8o3XFKHlJw8awYPwkVEElwEpTgG1jgwsHnaUdZnTT8+MFhi5NOsX3Sii2 pkyd0ulXWsMoi6FCfWwOC1v1ZtEjJv+msihAWorazt60nAAktsLxOgB6CaZk30DBBfhG dPawn/gOYWQDI3AbzSOboIczgoUjXunIY/pENtcQhme/pv2xriZQhCWoGZ2lYHWHPm+z ZPSKFCtvQ3jaWhGm8qJjhn0iX2cD45gxmVFEj7kh7QHZ/5EyCe6IejZnGW+zZ45Ek/xM rc+uIauPzkBEhAEt8uT5QCEbmEsfthfitNnfIQ+JG2VkL8PGAYM0xAX5/IIzRdi20cMB KEKQ== X-Gm-Message-State: AOAM532nu7VRITAYC3h+pq7eV1yS+gRWhlqwgCfnbHHnUkcnIE8PGV2f 3GICMm/duG89SAwVarFsDhE= X-Google-Smtp-Source: ABdhPJw7+T0P6Ouxeu7dgpNbQZDF5EXBC/YTqVl/e4VxLwsPs+mJYBXNMvJhS0HMKIGJGQ32Omz2oQ== X-Received: by 2002:a05:6512:3d14:b0:46b:81d9:b9ee with SMTP id d20-20020a0565123d1400b0046b81d9b9eemr3709015lfv.109.1650646286428; Fri, 22 Apr 2022 09:51:26 -0700 (PDT) Received: from otyshchenko.router ([212.22.223.21]) by smtp.gmail.com with ESMTPSA id n2-20020a056512310200b0046e2f507a3asm279742lfb.167.2022.04.22.09.51.25 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 22 Apr 2022 09:51:26 -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 V1 6/6] arm/xen: Assign xen-grant DMA ops for xen-grant DMA devices Date: Fri, 22 Apr 2022 19:51:03 +0300 Message-Id: <1650646263-22047-7-git-send-email-olekstysh@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1650646263-22047-1-git-send-email-olekstysh@gmail.com> References: <1650646263-22047-1-git-send-email-olekstysh@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Oleksandr Tyshchenko As the main (and single at the moment) purpose of xen-grant DMA devices is to enable using virtio devices in Xen guests in a safe manner, assign xen-grant DMA ops only if restricted access to the guest memory is enabled. Signed-off-by: Oleksandr Tyshchenko --- 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 --- include/xen/arm/xen-ops.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/include/xen/arm/xen-ops.h b/include/xen/arm/xen-ops.h index 288deb1..26954e5 100644 --- a/include/xen/arm/xen-ops.h +++ b/include/xen/arm/xen-ops.h @@ -2,12 +2,17 @@ #ifndef _ASM_ARM_XEN_OPS_H #define _ASM_ARM_XEN_OPS_H +#include #include +#include static inline void xen_setup_dma_ops(struct device *dev) { #ifdef CONFIG_XEN - if (xen_swiotlb_detect()) + if (arch_has_restricted_virtio_memory_access() && + 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