From patchwork Thu Dec 21 11:53:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Eugenio Perez Martin X-Patchwork-Id: 13501769 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 67511C35274 for ; Thu, 21 Dec 2023 11:55:42 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rGHch-0008DI-ES; Thu, 21 Dec 2023 06:53:55 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rGHcb-0008BM-Fu for qemu-devel@nongnu.org; Thu, 21 Dec 2023 06:53:50 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rGHcY-0007x6-B2 for qemu-devel@nongnu.org; Thu, 21 Dec 2023 06:53:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1703159625; 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=X1DbYgqk7ziG6yx4zIVFuyjJx5NuNdzxtgur0I7rsm0=; b=GhOib7XYAcSXEUorAV9gvO+skEhvDh9b8f6tuW6OcVMDzvLxd1AHgmkWZnZL8APdYriWza kGSFWwJf85NDV7J/OHB6jfyY8/YM9FAVnjfRvT+nD3SjHUBv54DNeq+eI2c/SHkT2Q6Ui9 fRIEd3flVN3pe/olFWgzDLvqiLhC4PE= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-139-thVNTv3-PxKpUxE4zjMSFA-1; Thu, 21 Dec 2023 06:53:40 -0500 X-MC-Unique: thVNTv3-PxKpUxE4zjMSFA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 011EA2806041; Thu, 21 Dec 2023 11:53:40 +0000 (UTC) Received: from eperezma.remote.csb (unknown [10.39.193.3]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3E20A40C6EB9; Thu, 21 Dec 2023 11:53:38 +0000 (UTC) From: =?utf-8?q?Eugenio_P=C3=A9rez?= To: qemu-devel@nongnu.org Cc: Parav Pandit , Dragos Tatulea , Lei Yang , Jason Wang , si-wei.liu@oracle.com, Zhu Lingshan , Stefano Garzarella , "Michael S. Tsirkin" , Laurent Vivier Subject: [PATCH v3 08/14] vdpa: move backend_cap to vhost_vdpa_shared Date: Thu, 21 Dec 2023 12:53:13 +0100 Message-Id: <20231221115319.3067586-9-eperezma@redhat.com> In-Reply-To: <20231221115319.3067586-1-eperezma@redhat.com> References: <20231221115319.3067586-1-eperezma@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.2 Received-SPF: pass client-ip=170.10.129.124; envelope-from=eperezma@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.063, 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, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Next patches will register the vhost_vdpa memory listener while the VM is migrating at the destination, so we can map the memory to the device before stopping the VM at the source. The main goal is to reduce the downtime. However, the destination QEMU is unaware of which vhost_vdpa device will register its memory_listener. If the source guest has CVQ enabled, it will be the CVQ device. Otherwise, it will be the first one. Move the backend_cap member to VhostVDPAShared so all vhost_vdpa can use it, rather than always in the first / last vhost_vdpa. Signed-off-by: Eugenio Pérez Acked-by: Jason Wang --- include/hw/virtio/vhost-vdpa.h | 3 +++ hw/virtio/vhost-vdpa.c | 8 +++++--- 2 files changed, 8 insertions(+), 3 deletions(-) diff --git a/include/hw/virtio/vhost-vdpa.h b/include/hw/virtio/vhost-vdpa.h index 05219bbcf7..11ac14085a 100644 --- a/include/hw/virtio/vhost-vdpa.h +++ b/include/hw/virtio/vhost-vdpa.h @@ -38,6 +38,9 @@ typedef struct vhost_vdpa_shared { /* IOVA mapping used by the Shadow Virtqueue */ VhostIOVATree *iova_tree; + /* Copy of backend features */ + uint64_t backend_cap; + bool iotlb_batch_begin_sent; /* Vdpa must send shadow addresses as IOTLB key for data queues, not GPA */ diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c index 85b13e09f4..458e46befd 100644 --- a/hw/virtio/vhost-vdpa.c +++ b/hw/virtio/vhost-vdpa.c @@ -161,7 +161,7 @@ static void vhost_vdpa_listener_begin_batch(struct vhost_vdpa *v) static void vhost_vdpa_iotlb_batch_begin_once(struct vhost_vdpa *v) { - if (v->dev->backend_cap & (0x1ULL << VHOST_BACKEND_F_IOTLB_BATCH) && + if (v->shared->backend_cap & (0x1ULL << VHOST_BACKEND_F_IOTLB_BATCH) && !v->shared->iotlb_batch_begin_sent) { vhost_vdpa_listener_begin_batch(v); } @@ -172,11 +172,10 @@ static void vhost_vdpa_iotlb_batch_begin_once(struct vhost_vdpa *v) static void vhost_vdpa_listener_commit(MemoryListener *listener) { struct vhost_vdpa *v = container_of(listener, struct vhost_vdpa, listener); - struct vhost_dev *dev = v->dev; struct vhost_msg_v2 msg = {}; int fd = v->shared->device_fd; - if (!(dev->backend_cap & (0x1ULL << VHOST_BACKEND_F_IOTLB_BATCH))) { + if (!(v->shared->backend_cap & (0x1ULL << VHOST_BACKEND_F_IOTLB_BATCH))) { return; } @@ -834,6 +833,8 @@ static int vhost_vdpa_set_features(struct vhost_dev *dev, static int vhost_vdpa_set_backend_cap(struct vhost_dev *dev) { + struct vhost_vdpa *v = dev->opaque; + uint64_t features; uint64_t f = 0x1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2 | 0x1ULL << VHOST_BACKEND_F_IOTLB_BATCH | @@ -855,6 +856,7 @@ static int vhost_vdpa_set_backend_cap(struct vhost_dev *dev) } dev->backend_cap = features; + v->shared->backend_cap = features; return 0; }