From nobody Tue Feb 10 19:08:58 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1649421479626586.9878129548463; Fri, 8 Apr 2022 05:37:59 -0700 (PDT) Received: from localhost ([::1]:50484 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ncnsD-0000rW-Pb for importer@patchew.org; Fri, 08 Apr 2022 08:37:57 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:45868) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ncnj6-0001mh-Ge for qemu-devel@nongnu.org; Fri, 08 Apr 2022 08:28:35 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:40439) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ncnj2-0008W5-6c for qemu-devel@nongnu.org; Fri, 08 Apr 2022 08:28:29 -0400 Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-589-v7cupeYsOVmy_8bGbRwiog-1; Fri, 08 Apr 2022 08:28:23 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 525B438149B7; Fri, 8 Apr 2022 12:28:23 +0000 (UTC) Received: from max-t490s.redhat.com (unknown [10.39.208.25]) by smtp.corp.redhat.com (Postfix) with ESMTP id 80103145B97F; Fri, 8 Apr 2022 12:28:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1649420907; 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=h7+8x56jA+0uvCY0ztzTVqj03ZGqnHkOnJgFZ4RnLC0=; b=VUO5/KHpHIXWC7V0uBgrdaC2EINzK71bd0Gf8G/XDA6oCTWmQlKrie5UNvsEAUbrIopYSG VeAeJU/dRn5Yc12GDc+dclkFUB2kTLileWIxRG4ajVKZwzaPge2GFmlKKhyB4PDVUIdSNs /qRGpjK84noF09jgLwHe/f219y4taNo= X-MC-Unique: v7cupeYsOVmy_8bGbRwiog-1 From: Maxime Coquelin To: qemu-devel@nongnu.org, mst@redhat.com, jasowang@redhat.com, andrew@daynix.com, yuri.benditovich@daynix.com, dgilbert@redhat.com, quintela@redhat.com Subject: [PATCH 3/5] virtio-net: add RSS support for Vhost backends Date: Fri, 8 Apr 2022 14:28:11 +0200 Message-Id: <20220408122813.1357045-4-maxime.coquelin@redhat.com> In-Reply-To: <20220408122813.1357045-1-maxime.coquelin@redhat.com> References: <20220408122813.1357045-1-maxime.coquelin@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.7 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=maxime.coquelin@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable 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=170.10.129.124; envelope-from=maxime.coquelin@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, 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: , Cc: chenbo.xia@intel.com, Maxime Coquelin , dmarchan@redhat.com, ktraynor@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1649421480664100001 Content-Type: text/plain; charset="utf-8"; x-default="true" This patch introduces new Vhost backend callbacks to support RSS, and makes them called in Virtio-net device. It will be used by Vhost-user backend implementation to support RSS feature. Signed-off-by: Maxime Coquelin --- hw/net/vhost_net-stub.c | 10 ++++++ hw/net/vhost_net.c | 22 +++++++++++++ hw/net/virtio-net.c | 53 +++++++++++++++++++++---------- include/hw/virtio/vhost-backend.h | 7 ++++ include/net/vhost_net.h | 4 +++ 5 files changed, 79 insertions(+), 17 deletions(-) diff --git a/hw/net/vhost_net-stub.c b/hw/net/vhost_net-stub.c index 89d71cfb8e..cc05e07c1f 100644 --- a/hw/net/vhost_net-stub.c +++ b/hw/net/vhost_net-stub.c @@ -101,3 +101,13 @@ int vhost_net_set_mtu(struct vhost_net *net, uint16_t = mtu) { return 0; } + +int vhost_net_get_rss(struct vhost_net *net, VirtioNetRssCapa *rss_capa) +{ + return 0; +} + +int vhost_net_set_rss(struct vhost_net *net, VirtioNetRssData *rss_data) +{ + return 0; +} diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c index 30379d2ca4..aa2a1e8e5f 100644 --- a/hw/net/vhost_net.c +++ b/hw/net/vhost_net.c @@ -512,3 +512,25 @@ int vhost_net_set_mtu(struct vhost_net *net, uint16_t = mtu) =20 return vhost_ops->vhost_net_set_mtu(&net->dev, mtu); } + +int vhost_net_get_rss(struct vhost_net *net, VirtioNetRssCapa *rss_capa) +{ + const VhostOps *vhost_ops =3D net->dev.vhost_ops; + + if (!vhost_ops->vhost_net_get_rss) { + return 0; + } + + return vhost_ops->vhost_net_get_rss(&net->dev, rss_capa); +} + +int vhost_net_set_rss(struct vhost_net *net, VirtioNetRssData *rss_data) +{ + const VhostOps *vhost_ops =3D net->dev.vhost_ops; + + if (!vhost_ops->vhost_net_set_rss) { + return 0; + } + + return vhost_ops->vhost_net_set_rss(&net->dev, rss_data); +} diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index 38436e472b..237bbdb1b3 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -741,8 +741,10 @@ static uint64_t virtio_net_get_features(VirtIODevice *= vdev, uint64_t features, return features; } =20 - if (!ebpf_rss_is_loaded(&n->ebpf_rss)) { - virtio_clear_feature(&features, VIRTIO_NET_F_RSS); + if (nc->peer->info->type =3D=3D NET_CLIENT_DRIVER_TAP) { + if (!ebpf_rss_is_loaded(&n->ebpf_rss)) { + virtio_clear_feature(&features, VIRTIO_NET_F_RSS); + } } features =3D vhost_net_get_features(get_vhost_net(nc->peer), features); vdev->backend_features =3D features; @@ -1161,11 +1163,17 @@ static void virtio_net_detach_epbf_rss(VirtIONet *n= ); =20 static void virtio_net_disable_rss(VirtIONet *n) { + NetClientState *nc =3D qemu_get_queue(n->nic); + if (n->rss_data.enabled) { trace_virtio_net_rss_disable(); } n->rss_data.enabled =3D false; =20 + if (nc->peer && nc->peer->info->type =3D=3D NET_CLIENT_DRIVER_VHOST_US= ER) { + vhost_net_set_rss(get_vhost_net(nc->peer), &n->rss_data); + } + virtio_net_detach_epbf_rss(n); } =20 @@ -1239,6 +1247,7 @@ static uint16_t virtio_net_handle_rss(VirtIONet *n, bool do_rss) { VirtIODevice *vdev =3D VIRTIO_DEVICE(n); + NetClientState *nc =3D qemu_get_queue(n->nic); struct virtio_net_rss_config cfg; size_t s, offset =3D 0, size_get; uint16_t queue_pairs, i; @@ -1354,22 +1363,29 @@ static uint16_t virtio_net_handle_rss(VirtIONet *n, } n->rss_data.enabled =3D true; =20 - if (!n->rss_data.populate_hash) { - if (!virtio_net_attach_epbf_rss(n)) { - /* EBPF must be loaded for vhost */ - if (get_vhost_net(qemu_get_queue(n->nic)->peer)) { - warn_report("Can't load eBPF RSS for vhost"); - goto error; + if (nc->peer && nc->peer->info->type =3D=3D NET_CLIENT_DRIVER_VHOST_US= ER) { + if (vhost_net_set_rss(get_vhost_net(nc->peer), &n->rss_data)) { + warn_report("Failed to configure RSS for vhost-user"); + goto error; + } + } else { + if (!n->rss_data.populate_hash) { + if (!virtio_net_attach_epbf_rss(n)) { + /* EBPF must be loaded for vhost */ + if (get_vhost_net(nc->peer)) { + warn_report("Can't load eBPF RSS for vhost"); + goto error; + } + /* fallback to software RSS */ + warn_report("Can't load eBPF RSS - fallback to software RS= S"); + n->rss_data.enabled_software_rss =3D true; } - /* fallback to software RSS */ - warn_report("Can't load eBPF RSS - fallback to software RSS"); + } else { + /* use software RSS for hash populating */ + /* and detach eBPF if was loaded before */ + virtio_net_detach_epbf_rss(n); n->rss_data.enabled_software_rss =3D true; } - } else { - /* use software RSS for hash populating */ - /* and detach eBPF if was loaded before */ - virtio_net_detach_epbf_rss(n); - n->rss_data.enabled_software_rss =3D true; } =20 trace_virtio_net_rss_enable(n->rss_data.hash_types, @@ -3534,8 +3550,11 @@ static void virtio_net_device_realize(DeviceState *d= ev, Error **errp) n->rss_capa.max_key_size =3D VIRTIO_NET_RSS_DEFAULT_KEY_SIZE; n->rss_capa.max_indirection_len =3D VIRTIO_NET_RSS_DEFAULT_TABLE_L= EN; n->rss_capa.supported_hashes =3D VIRTIO_NET_RSS_SUPPORTED_HASHES; - - virtio_net_load_ebpf(n); + if (nc->peer && nc->peer->info->type =3D=3D NET_CLIENT_DRIVER_VHOS= T_USER) { + vhost_net_get_rss(get_vhost_net(nc->peer), &n->rss_capa); + } else { + virtio_net_load_ebpf(n); + } } else { n->rss_capa.max_indirection_len =3D 1; } diff --git a/include/hw/virtio/vhost-backend.h b/include/hw/virtio/vhost-ba= ckend.h index 81bf3109f8..0b9e2ea26e 100644 --- a/include/hw/virtio/vhost-backend.h +++ b/include/hw/virtio/vhost-backend.h @@ -12,6 +12,7 @@ #define VHOST_BACKEND_H =20 #include "exec/memory.h" +#include "hw/virtio/virtio-net.h" =20 typedef enum VhostBackendType { VHOST_BACKEND_TYPE_NONE =3D 0, @@ -45,6 +46,10 @@ typedef int (*vhost_backend_memslots_limit)(struct vhost= _dev *dev); typedef int (*vhost_net_set_backend_op)(struct vhost_dev *dev, struct vhost_vring_file *file); typedef int (*vhost_net_set_mtu_op)(struct vhost_dev *dev, uint16_t mtu); +typedef int (*vhost_net_get_rss_op)(struct vhost_dev *dev, + VirtioNetRssCapa *rss_capa); +typedef int (*vhost_net_set_rss_op)(struct vhost_dev *dev, + VirtioNetRssData *rss_data); typedef int (*vhost_scsi_set_endpoint_op)(struct vhost_dev *dev, struct vhost_scsi_target *target); typedef int (*vhost_scsi_clear_endpoint_op)(struct vhost_dev *dev, @@ -133,6 +138,8 @@ typedef struct VhostOps { vhost_backend_memslots_limit vhost_backend_memslots_limit; vhost_net_set_backend_op vhost_net_set_backend; vhost_net_set_mtu_op vhost_net_set_mtu; + vhost_net_get_rss_op vhost_net_get_rss; + vhost_net_set_rss_op vhost_net_set_rss; vhost_scsi_set_endpoint_op vhost_scsi_set_endpoint; vhost_scsi_clear_endpoint_op vhost_scsi_clear_endpoint; vhost_scsi_get_abi_version_op vhost_scsi_get_abi_version; diff --git a/include/net/vhost_net.h b/include/net/vhost_net.h index 387e913e4e..9cf702e7e3 100644 --- a/include/net/vhost_net.h +++ b/include/net/vhost_net.h @@ -48,4 +48,8 @@ uint64_t vhost_net_get_acked_features(VHostNetState *net); =20 int vhost_net_set_mtu(struct vhost_net *net, uint16_t mtu); =20 +int vhost_net_get_rss(struct vhost_net *net, VirtioNetRssCapa *rss_capa); + +int vhost_net_set_rss(struct vhost_net *net, VirtioNetRssData *rss_data); + #endif --=20 2.35.1