From nobody Mon Feb 9 10:29:40 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1605900319; cv=none; d=zohomail.com; s=zohoarc; b=aEAf3gJc6jVN5Z92oj+064KjMHEbwBQ6InazWcsaVoegeD75JrI0TXasBy+xRIkLhGOiqrsloxb3R8QJTm2V12XKW6Wi3FP8RUIlDYisV8DVqtB/Nlq3m0IEhgK/XJAa4t5u59iBwNqdGMLdLF5qK3b+Ram40Cf7xXxzisHtkGE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1605900319; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=ryEh3kyaXHqK19Bj8UjCon+CnIrYqmewzumtOEVqPsQ=; b=XWTiV/ROYfBdrOyHofsXTAPMJpCJrr2/dTsHcEtvyryImj/NBLFzUUVKj5kgEe2NAc8QiSN1Bp5MWsl7gBwMyPOyzs8IJJiu0DiYDLluU46QuZJeFUhr2Q1ofcCxwn2C9bYHLRpFjJhJEiTAgytvRrP5YDtwT1DUkyr3lPGhpAc= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1605900319646378.53789246026315; Fri, 20 Nov 2020 11:25:19 -0800 (PST) Received: from localhost ([::1]:46372 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kgC20-00015z-9q for importer@patchew.org; Fri, 20 Nov 2020 14:25:16 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:42192) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kgBb0-0008QI-Dy for qemu-devel@nongnu.org; Fri, 20 Nov 2020 13:57:22 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:46179) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kgBay-0008UI-OS for qemu-devel@nongnu.org; Fri, 20 Nov 2020 13:57:22 -0500 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-434-OefOQcNqNjmjp4PHqy7Kmg-1; Fri, 20 Nov 2020 13:57:17 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id F365B1084425; Fri, 20 Nov 2020 18:57:13 +0000 (UTC) Received: from eperezma.remote.csb (ovpn-112-88.ams2.redhat.com [10.36.112.88]) by smtp.corp.redhat.com (Postfix) with ESMTP id A90BD5C1D5; Fri, 20 Nov 2020 18:56:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1605898640; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ryEh3kyaXHqK19Bj8UjCon+CnIrYqmewzumtOEVqPsQ=; b=H3kjDMtdWUV1rYRruexbHqgbOsphrs5gegTpkCA3jDr9UmI6h+46lQ92aUxSZUBHC0dcJo iHhDngJ1Dir6s//vijMeZv7dk5tVxZkFDznyWOElxVVACCTGQ8qyXPov8pzVF5Z3BWf9vJ yusqNHEhxwHGpEPZYJebk5PK0m6wJ54= X-MC-Unique: OefOQcNqNjmjp4PHqy7Kmg-1 From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= To: qemu-devel@nongnu.org Subject: [RFC PATCH 24/27] vhost: iommu changes Date: Fri, 20 Nov 2020 19:51:02 +0100 Message-Id: <20201120185105.279030-25-eperezma@redhat.com> In-Reply-To: <20201120185105.279030-1-eperezma@redhat.com> References: <20201120185105.279030-1-eperezma@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=63.128.21.124; envelope-from=eperezma@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm@vger.kernel.org, "Michael S. Tsirkin" , Jason Wang , Daniel Daly , virtualization@lists.linux-foundation.org, Liran Alon , Eli Cohen , Nitin Shrivastav , Alex Barba , Christophe Fontaine , Juan Quintela , Lee Ballard , Lars Ganrot , Rob Miller , Stefano Garzarella , Howard Cai , Parav Pandit , vm , Salil Mehta , Stephen Finucane , Xiao W Wang , Sean Mooney , Stefan Hajnoczi , Jim Harford , Dmytro Kazantsev , Siwei Liu , Harpreet Singh Anand , Michael Lilja , Max Gurtovoy Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Since vhost is now asking for qemu's VA, iommu needs to be bypassed. Signed-off-by: Eugenio P=C3=A9rez --- hw/virtio/vhost.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index eebfac4455..cb44b9997f 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -1109,6 +1109,10 @@ static int vhost_sw_live_migration_start(struct vhos= t_dev *dev) =20 assert(dev->vhost_ops->vhost_set_vring_enable); dev->vhost_ops->vhost_set_vring_enable(dev, false); + if (vhost_dev_has_iommu(dev)) { + r =3D vhost_backend_invalidate_device_iotlb(dev, 0, -1ULL); + assert(r =3D=3D 0); + } =20 for (idx =3D 0; idx < dev->nvqs; ++idx) { struct vhost_virtqueue *vq =3D &dev->vqs[idx]; @@ -1269,6 +1273,19 @@ int vhost_device_iotlb_miss(struct vhost_dev *dev, u= int64_t iova, int write) =20 trace_vhost_iotlb_miss(dev, 1); =20 + if (dev->sw_lm_enabled) { + uaddr =3D iova; + len =3D 4096; + ret =3D vhost_backend_update_device_iotlb(dev, iova, uaddr, len, + IOMMU_RW); + if (ret) { + trace_vhost_iotlb_miss(dev, 2); + error_report("Fail to update device iotlb"); + } + + return ret; + } + iotlb =3D address_space_get_iotlb_entry(dev->vdev->dma_as, iova, write, MEMTXATTRS_UNSPECIFIED); --=20 2.18.4