From nobody Sun Dec 14 06:21:57 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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=pass(p=quarantine dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1752239318; cv=none; d=zohomail.com; s=zohoarc; b=ZyMFlQ/xSu98+aIlxtJQc8v2AfeMDWlWZ1gCWAkaIblRsAP0TQ8+BIyjvsz4XUVQXDiZxYNIfjZwUCsHtqaqKzX498JJH0Cpo4p669C5jwJCYXKmraFtaFjAWSA9BDJocZZIZy1j33P+ji/BibGFOQlcCEeNAbbljo1LuA7Zzgc= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1752239318; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=VwICP7osbtCMDY8K14kNvPRMwTMtoYbzOjS9iaDvYOY=; b=c3YYoqlUn2mhAx3SItmfZmF+q6hgDlgaC/siYPZJeVCKgkQPY13Zssc6z/zJ3GshPsY1LaDOqVk3sDot4Bl6hPtDSt2gQ3fn7mScKYsc39+XEwBJTYG8IEbCqkECjvWnVC976k/RHQnGskgurfl0HGnOqH8aNvwwbYZ8ta/rVgc= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; 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=pass header.from= (p=quarantine dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1752239318227589.142507919581; Fri, 11 Jul 2025 06:08:38 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uaDSZ-0004mi-W2; Fri, 11 Jul 2025 09:06:40 -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 1uaDQ5-0000qC-5h for qemu-devel@nongnu.org; Fri, 11 Jul 2025 09:04:05 -0400 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 1uaDQ2-0004Cc-8A for qemu-devel@nongnu.org; Fri, 11 Jul 2025 09:04:04 -0400 Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-695-4m2qcR0KN_WlbZiWsncZMA-1; Fri, 11 Jul 2025 09:03:57 -0400 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (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 mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 7D9E01800368; Fri, 11 Jul 2025 13:03:56 +0000 (UTC) Received: from gerbillo.redhat.com (unknown [10.44.33.145]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 1CB7419560A3; Fri, 11 Jul 2025 13:03:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1752239041; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=VwICP7osbtCMDY8K14kNvPRMwTMtoYbzOjS9iaDvYOY=; b=XwmZTnSEgW/fufsDhKhWb0DM2FpGyiYaGKhdUthw4vyHHQPTsbFMRGxeOqLDOXsBZreWpB i015BY+B1t/hvuDg4SkESuIC0Z7yx0Vb/SoyeOFj+bEx5vY2sSnfNL1QHDtVnHYcE/lQiE fDr0LwH19Urjmr/4/E5x+7Fe8i3S9ZI= X-MC-Unique: 4m2qcR0KN_WlbZiWsncZMA-1 X-Mimecast-MFC-AGG-ID: 4m2qcR0KN_WlbZiWsncZMA_1752239036 From: Paolo Abeni To: qemu-devel@nongnu.org Cc: Paolo Bonzini , Dmitry Fleytman , Akihiko Odaki , Jason Wang , Sriram Yagnaraman , "Michael S. Tsirkin" , Stefano Garzarella , Cornelia Huck , Luigi Rizzo , Giuseppe Lettieri , Vincenzo Maffione , Eric Blake , Markus Armbruster , kvm@vger.kernel.org Subject: [PATCH RFC v2 11/13] virtio-net: implement extended features support Date: Fri, 11 Jul 2025 15:02:16 +0200 Message-ID: In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 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=pabeni@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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1752239319827116600 Content-Type: text/plain; charset="utf-8" Use the extended types and helpers to manipulate the virtio_net features. Note that offloads are still 64bits wide, as per specification, and extended offloads will be mapped into such range. Signed-off-by: Paolo Abeni --- v1 -> v2: - uint128_t -> uint64_t[] - more verbose macro definitions --- hw/net/virtio-net.c | 125 +++++++++++++++++++-------------- include/hw/virtio/virtio-net.h | 2 +- 2 files changed, 75 insertions(+), 52 deletions(-) diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index 16df9e85c8..09d5ef1ece 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -90,6 +90,19 @@ VIRTIO_NET_RSS_HASH_TYPE_TCP_EX |= \ VIRTIO_NET_RSS_HASH_TYPE_UDP_EX) =20 +/* + * Features starting from VIRTIO_NET_FEATURES_MAP_MIN bit correspond + * to guest offloads in the VIRTIO_NET_OFFLOAD_MAP range + */ +#define VIRTIO_NET_OFFLOAD_MAP_MIN 46 +#define VIRTIO_NET_OFFLOAD_MAP_LENGTH 4 +#define VIRTIO_NET_OFFLOAD_MAP MAKE_64BIT_MASK( \ + VIRTIO_NET_OFFLOAD_MAP_MIN, \ + VIRTIO_NET_OFFLOAD_MAP_LENGT= H) +#define VIRTIO_NET_FEATURES_MAP_MIN 65 +#define VIRTIO_NET_F2O_SHIFT (VIRTIO_NET_OFFLOAD_MAP_MIN - \ + VIRTIO_NET_FEATURES_MAP_MIN + 64) + static const VirtIOFeature feature_sizes[] =3D { {.flags =3D 1ULL << VIRTIO_NET_F_MAC, .end =3D endof(struct virtio_net_config, mac)}, @@ -752,59 +765,59 @@ static void virtio_net_set_queue_pairs(VirtIONet *n) =20 static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue); =20 -static uint64_t virtio_net_get_features(VirtIODevice *vdev, uint64_t featu= res, - Error **errp) +static void virtio_net_get_features(VirtIODevice *vdev, uint64_t *features, + Error **errp) { VirtIONet *n =3D VIRTIO_NET(vdev); NetClientState *nc =3D qemu_get_queue(n->nic); =20 /* Firstly sync all virtio-net possible supported features */ - features |=3D n->host_features; + virtio_features_or(features, features, n->host_features_array); =20 - virtio_add_feature(&features, VIRTIO_NET_F_MAC); + virtio_add_feature_ex(features, VIRTIO_NET_F_MAC); =20 if (!peer_has_vnet_hdr(n)) { - virtio_clear_feature(&features, VIRTIO_NET_F_CSUM); - virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO4); - virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO6); - virtio_clear_feature(&features, VIRTIO_NET_F_HOST_ECN); + virtio_clear_feature_ex(features, VIRTIO_NET_F_CSUM); + virtio_clear_feature_ex(features, VIRTIO_NET_F_HOST_TSO4); + virtio_clear_feature_ex(features, VIRTIO_NET_F_HOST_TSO6); + virtio_clear_feature_ex(features, VIRTIO_NET_F_HOST_ECN); =20 - virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_CSUM); - virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO4); - virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO6); - virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_ECN); + virtio_clear_feature_ex(features, VIRTIO_NET_F_GUEST_CSUM); + virtio_clear_feature_ex(features, VIRTIO_NET_F_GUEST_TSO4); + virtio_clear_feature_ex(features, VIRTIO_NET_F_GUEST_TSO6); + virtio_clear_feature_ex(features, VIRTIO_NET_F_GUEST_ECN); =20 - virtio_clear_feature(&features, VIRTIO_NET_F_HOST_USO); - virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_USO4); - virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_USO6); + virtio_clear_feature_ex(features, VIRTIO_NET_F_HOST_USO); + virtio_clear_feature_ex(features, VIRTIO_NET_F_GUEST_USO4); + virtio_clear_feature_ex(features, VIRTIO_NET_F_GUEST_USO6); =20 - virtio_clear_feature(&features, VIRTIO_NET_F_HASH_REPORT); + virtio_clear_feature_ex(features, VIRTIO_NET_F_HASH_REPORT); } =20 if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) { - virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_UFO); - virtio_clear_feature(&features, VIRTIO_NET_F_HOST_UFO); + virtio_clear_feature_ex(features, VIRTIO_NET_F_GUEST_UFO); + virtio_clear_feature_ex(features, VIRTIO_NET_F_HOST_UFO); } =20 if (!peer_has_uso(n)) { - virtio_clear_feature(&features, VIRTIO_NET_F_HOST_USO); - virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_USO4); - virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_USO6); + virtio_clear_feature_ex(features, VIRTIO_NET_F_HOST_USO); + virtio_clear_feature_ex(features, VIRTIO_NET_F_GUEST_USO4); + virtio_clear_feature_ex(features, VIRTIO_NET_F_GUEST_USO6); } =20 if (!get_vhost_net(nc->peer)) { - return features; + return; } =20 if (!ebpf_rss_is_loaded(&n->ebpf_rss)) { - virtio_clear_feature(&features, VIRTIO_NET_F_RSS); + virtio_clear_feature_ex(features, VIRTIO_NET_F_RSS); } - features =3D vhost_net_get_features(get_vhost_net(nc->peer), features); - vdev->backend_features =3D features; + vhost_net_get_features_ex(get_vhost_net(nc->peer), features); + virtio_features_copy(vdev->backend_features_array, features); =20 if (n->mtu_bypass_backend && (n->host_features & 1ULL << VIRTIO_NET_F_MTU)) { - features |=3D (1ULL << VIRTIO_NET_F_MTU); + virtio_add_feature_ex(features, VIRTIO_NET_F_MTU); } =20 /* @@ -819,10 +832,8 @@ static uint64_t virtio_net_get_features(VirtIODevice *= vdev, uint64_t features, * support it. */ if (!virtio_has_feature(vdev->backend_features, VIRTIO_NET_F_CTRL_VQ))= { - virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_ANNOUNCE); + virtio_clear_feature_ex(features, VIRTIO_NET_F_GUEST_ANNOUNCE); } - - return features; } =20 static uint64_t virtio_net_bad_features(VirtIODevice *vdev) @@ -855,7 +866,14 @@ static void virtio_net_apply_guest_offloads(VirtIONet = *n) qemu_set_offload(qemu_get_queue(n->nic)->peer, &ol); } =20 -static uint64_t virtio_net_guest_offloads_by_features(uint64_t features) +static uint64_t virtio_net_features_to_offload(const uint64_t *features) +{ + return (features[0] & ~VIRTIO_NET_OFFLOAD_MAP) | + ((features[1] << VIRTIO_NET_F2O_SHIFT) & VIRTIO_NET_OFFLOAD_MAP= ); +} + +static uint64_t +virtio_net_guest_offloads_by_features(const uint64_t *features) { static const uint64_t guest_offloads_mask =3D (1ULL << VIRTIO_NET_F_GUEST_CSUM) | @@ -866,13 +884,13 @@ static uint64_t virtio_net_guest_offloads_by_features= (uint64_t features) (1ULL << VIRTIO_NET_F_GUEST_USO4) | (1ULL << VIRTIO_NET_F_GUEST_USO6); =20 - return guest_offloads_mask & features; + return guest_offloads_mask & virtio_net_features_to_offload(features); } =20 uint64_t virtio_net_supported_guest_offloads(const VirtIONet *n) { VirtIODevice *vdev =3D VIRTIO_DEVICE(n); - return virtio_net_guest_offloads_by_features(vdev->guest_features); + return virtio_net_guest_offloads_by_features(vdev->guest_features_arra= y); } =20 typedef struct { @@ -951,34 +969,39 @@ static void failover_add_primary(VirtIONet *n, Error = **errp) error_propagate(errp, err); } =20 -static void virtio_net_set_features(VirtIODevice *vdev, uint64_t features) +static void virtio_net_set_features(VirtIODevice *vdev, + const uint64_t *in_features) { + uint64_t features[VIRTIO_FEATURES_DWORDS]; VirtIONet *n =3D VIRTIO_NET(vdev); Error *err =3D NULL; int i; =20 + virtio_features_copy(features, in_features); if (n->mtu_bypass_backend && !virtio_has_feature(vdev->backend_features, VIRTIO_NET_F_MTU))= { - features &=3D ~(1ULL << VIRTIO_NET_F_MTU); + virtio_clear_feature_ex(features, VIRTIO_NET_F_MTU); } =20 virtio_net_set_multiqueue(n, - virtio_has_feature(features, VIRTIO_NET_F_RS= S) || - virtio_has_feature(features, VIRTIO_NET_F_MQ= )); + virtio_has_feature_ex(features, + VIRTIO_NET_F_RSS) || + virtio_has_feature_ex(features, + VIRTIO_NET_F_MQ)); =20 virtio_net_set_mrg_rx_bufs(n, - virtio_has_feature(features, + virtio_has_feature_ex(features, VIRTIO_NET_F_MRG_RXBUF), - virtio_has_feature(features, + virtio_has_feature_ex(features, VIRTIO_F_VERSION_1), - virtio_has_feature(features, + virtio_has_feature_ex(features, VIRTIO_NET_F_HASH_REPORT= )); =20 - n->rsc4_enabled =3D virtio_has_feature(features, VIRTIO_NET_F_RSC_EXT)= && - virtio_has_feature(features, VIRTIO_NET_F_GUEST_TSO4); - n->rsc6_enabled =3D virtio_has_feature(features, VIRTIO_NET_F_RSC_EXT)= && - virtio_has_feature(features, VIRTIO_NET_F_GUEST_TSO6); - n->rss_data.redirect =3D virtio_has_feature(features, VIRTIO_NET_F_RSS= ); + n->rsc4_enabled =3D virtio_has_feature_ex(features, VIRTIO_NET_F_RSC_E= XT) && + virtio_has_feature_ex(features, VIRTIO_NET_F_GUEST_TSO4); + n->rsc6_enabled =3D virtio_has_feature_ex(features, VIRTIO_NET_F_RSC_E= XT) && + virtio_has_feature_ex(features, VIRTIO_NET_F_GUEST_TSO6); + n->rss_data.redirect =3D virtio_has_feature_ex(features, VIRTIO_NET_F_= RSS); =20 if (n->has_vnet_hdr) { n->curr_guest_offloads =3D @@ -992,7 +1015,7 @@ static void virtio_net_set_features(VirtIODevice *vdev= , uint64_t features) if (!get_vhost_net(nc->peer)) { continue; } - vhost_net_ack_features(get_vhost_net(nc->peer), features); + vhost_net_ack_features_ex(get_vhost_net(nc->peer), features); =20 /* * keep acked_features in NetVhostUserState up-to-date so it @@ -1001,11 +1024,11 @@ static void virtio_net_set_features(VirtIODevice *v= dev, uint64_t features) vhost_net_save_acked_features(nc->peer); } =20 - if (!virtio_has_feature(features, VIRTIO_NET_F_CTRL_VLAN)) { + if (!virtio_has_feature_ex(features, VIRTIO_NET_F_CTRL_VLAN)) { memset(n->vlans, 0xff, MAX_VLAN >> 3); } =20 - if (virtio_has_feature(features, VIRTIO_NET_F_STANDBY)) { + if (virtio_has_feature_ex(features, VIRTIO_NET_F_STANDBY)) { qapi_event_send_failover_negotiated(n->netclient_name); qatomic_set(&n->failover_primary_hidden, false); failover_add_primary(n, &err); @@ -1966,10 +1989,10 @@ static ssize_t virtio_net_receive_rcu(NetClientStat= e *nc, const uint8_t *buf, virtio_error(vdev, "virtio-net unexpected empty queue: " "i %zd mergeable %d offset %zd, size %zd, " "guest hdr len %zd, host hdr len %zd " - "guest features 0x%" PRIx64, + "guest features 0x" VIRTIO_FEATURES_FMT, i, n->mergeable_rx_bufs, offset, size, n->guest_hdr_len, n->host_hdr_len, - vdev->guest_features); + VIRTIO_FEATURES_PR(vdev->guest_features_array= )); } err =3D -1; goto err; @@ -4150,8 +4173,8 @@ static void virtio_net_class_init(ObjectClass *klass,= const void *data) vdc->unrealize =3D virtio_net_device_unrealize; vdc->get_config =3D virtio_net_get_config; vdc->set_config =3D virtio_net_set_config; - vdc->get_features =3D virtio_net_get_features; - vdc->set_features =3D virtio_net_set_features; + vdc->get_features_ex =3D virtio_net_get_features; + vdc->set_features_ex =3D virtio_net_set_features; vdc->bad_features =3D virtio_net_bad_features; vdc->reset =3D virtio_net_reset; vdc->queue_reset =3D virtio_net_queue_reset; diff --git a/include/hw/virtio/virtio-net.h b/include/hw/virtio/virtio-net.h index b9ea9e824e..5168027267 100644 --- a/include/hw/virtio/virtio-net.h +++ b/include/hw/virtio/virtio-net.h @@ -178,7 +178,7 @@ struct VirtIONet { uint32_t has_vnet_hdr; size_t host_hdr_len; size_t guest_hdr_len; - uint64_t host_features; + VIRTIO_DECLARE_FEATURES(host_features); uint32_t rsc_timeout; uint8_t rsc4_enabled; uint8_t rsc6_enabled; --=20 2.50.0