From patchwork Thu Oct 19 14:34:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Eugenio_P=C3=A9rez?= X-Patchwork-Id: 1851821 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=VkTeoaED; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=patchwork.ozlabs.org) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4SB9Nw3Pd3z20Zj for ; Fri, 20 Oct 2023 01:40:16 +1100 (AEDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qtU7M-0006i6-49; Thu, 19 Oct 2023 10:35:20 -0400 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 1qtU7I-0006gq-DY for qemu-devel@nongnu.org; Thu, 19 Oct 2023 10:35:16 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qtU7F-0000FK-Ve for qemu-devel@nongnu.org; Thu, 19 Oct 2023 10:35:16 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1697726113; 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=5JvnvZjI3INtTAjzXeyMt4WdhTcdqcyEbjYGoNW65M0=; b=VkTeoaED//V6hsP/0/ri+FW38magwUnGei1W6ToJu5r3uaQ+7xCHAeRVSxysIdPY2DoNCI I8JaMp9UFZBkD7iKups2nh8djOhuDXT+kV3yvfzs6zhplevGx6nz6wUWE7UyXL1R48e8KN rQI+3FNZQqQRSt6wP8Ro3LoEHXecYcc= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-66-AtnOkfmZMtmjviHPnXHOeA-1; Thu, 19 Oct 2023 10:35:10 -0400 X-MC-Unique: AtnOkfmZMtmjviHPnXHOeA-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id A13678EB361; Thu, 19 Oct 2023 14:35:09 +0000 (UTC) Received: from eperezma.remote.csb (unknown [10.39.192.162]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6D87EC15BB8; Thu, 19 Oct 2023 14:35:07 +0000 (UTC) From: =?utf-8?q?Eugenio_P=C3=A9rez?= To: qemu-devel@nongnu.org Cc: Shannon , Parav Pandit , Stefano Garzarella , "Michael S. Tsirkin" , yin31149@gmail.com, Jason Wang , Yajun Wu , Zhu Lingshan , Lei Yang , Dragos Tatulea , Juan Quintela , Laurent Vivier , si-wei.liu@oracle.com, Gautam Dawar Subject: [RFC PATCH 04/18] vdpa: move shadow_data to vhost_vdpa_shared Date: Thu, 19 Oct 2023 16:34:41 +0200 Message-Id: <20231019143455.2377694-5-eperezma@redhat.com> In-Reply-To: <20231019143455.2377694-1-eperezma@redhat.com> References: <20231019143455.2377694-1-eperezma@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.8 Received-SPF: pass client-ip=170.10.133.124; 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_H3=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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.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 shadow_data member to VhostVDPAShared so all vhost_vdpa can use it, rather than always in the first or last vhost_vdpa. Signed-off-by: Eugenio Pérez --- include/hw/virtio/vhost-vdpa.h | 5 +++-- hw/virtio/vhost-vdpa.c | 6 +++--- net/vhost-vdpa.c | 23 ++++++----------------- 3 files changed, 12 insertions(+), 22 deletions(-) diff --git a/include/hw/virtio/vhost-vdpa.h b/include/hw/virtio/vhost-vdpa.h index 8d52a7e498..01e0f25e27 100644 --- a/include/hw/virtio/vhost-vdpa.h +++ b/include/hw/virtio/vhost-vdpa.h @@ -36,6 +36,9 @@ typedef struct vhost_vdpa_shared { /* IOVA mapping used by the Shadow Virtqueue */ VhostIOVATree *iova_tree; + + /* Vdpa must send shadow addresses as IOTLB key for data queues, not GPA */ + bool shadow_data; } VhostVDPAShared; typedef struct vhost_vdpa { @@ -47,8 +50,6 @@ typedef struct vhost_vdpa { MemoryListener listener; uint64_t acked_features; bool shadow_vqs_enabled; - /* Vdpa must send shadow addresses as IOTLB key for data queues, not GPA */ - bool shadow_data; /* Device suspended successfully */ bool suspended; VhostVDPAShared *shared; diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c index 2bceadd118..ec028e4c56 100644 --- a/hw/virtio/vhost-vdpa.c +++ b/hw/virtio/vhost-vdpa.c @@ -353,7 +353,7 @@ static void vhost_vdpa_listener_region_add(MemoryListener *listener, vaddr, section->readonly); llsize = int128_sub(llend, int128_make64(iova)); - if (v->shadow_data) { + if (v->shared->shadow_data) { int r; mem_region.translated_addr = (hwaddr)(uintptr_t)vaddr, @@ -380,7 +380,7 @@ static void vhost_vdpa_listener_region_add(MemoryListener *listener, return; fail_map: - if (v->shadow_data) { + if (v->shared->shadow_data) { vhost_iova_tree_remove(v->shared->iova_tree, mem_region); } @@ -435,7 +435,7 @@ static void vhost_vdpa_listener_region_del(MemoryListener *listener, llsize = int128_sub(llend, int128_make64(iova)); - if (v->shadow_data) { + if (v->shared->shadow_data) { const DMAMap *result; const void *vaddr = memory_region_get_ram_ptr(section->mr) + section->offset_within_region + diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index 9648b0ef7e..01202350ea 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -282,15 +282,6 @@ static ssize_t vhost_vdpa_receive(NetClientState *nc, const uint8_t *buf, return size; } -/** From any vdpa net client, get the netclient of the first queue pair */ -static VhostVDPAState *vhost_vdpa_net_first_nc_vdpa(VhostVDPAState *s) -{ - NICState *nic = qemu_get_nic(s->nc.peer); - NetClientState *nc0 = qemu_get_peer(nic->ncs, 0); - - return DO_UPCAST(VhostVDPAState, nc, nc0); -} - static void vhost_vdpa_net_log_global_enable(VhostVDPAState *s, bool enable) { struct vhost_vdpa *v = &s->vhost_vdpa; @@ -360,10 +351,10 @@ static int vhost_vdpa_net_data_start(NetClientState *nc) if (s->always_svq || migration_is_setup_or_active(migrate_get_current()->state)) { v->shadow_vqs_enabled = true; - v->shadow_data = true; + v->shared->shadow_data = true; } else { v->shadow_vqs_enabled = false; - v->shadow_data = false; + v->shared->shadow_data = false; } if (v->index == 0) { @@ -513,7 +504,7 @@ dma_map_err: static int vhost_vdpa_net_cvq_start(NetClientState *nc) { - VhostVDPAState *s, *s0; + VhostVDPAState *s; struct vhost_vdpa *v; int64_t cvq_group; int r; @@ -524,12 +515,10 @@ static int vhost_vdpa_net_cvq_start(NetClientState *nc) s = DO_UPCAST(VhostVDPAState, nc, nc); v = &s->vhost_vdpa; - s0 = vhost_vdpa_net_first_nc_vdpa(s); - v->shadow_data = s0->vhost_vdpa.shadow_vqs_enabled; - v->shadow_vqs_enabled = s0->vhost_vdpa.shadow_vqs_enabled; + v->shadow_vqs_enabled = s->always_svq; s->vhost_vdpa.address_space_id = VHOST_VDPA_GUEST_PA_ASID; - if (s->vhost_vdpa.shadow_data) { + if (v->shared->shadow_data) { /* SVQ is already configured for all virtqueues */ goto out; } @@ -1455,12 +1444,12 @@ static NetClientState *net_vhost_vdpa_init(NetClientState *peer, s->always_svq = svq; s->migration_state.notify = vdpa_net_migration_state_notifier; s->vhost_vdpa.shadow_vqs_enabled = svq; - s->vhost_vdpa.shadow_data = svq; if (queue_pair_index == 0) { vhost_vdpa_net_valid_svq_features(features, &s->vhost_vdpa.migration_blocker); s->vhost_vdpa.shared = g_new0(VhostVDPAShared, 1); s->vhost_vdpa.shared->iova_range = iova_range; + s->vhost_vdpa.shared->shadow_data = svq; } else if (!is_datapath) { s->cvq_cmd_out_buffer = mmap(NULL, vhost_vdpa_net_cvq_cmd_page_len(), PROT_READ | PROT_WRITE,