From nobody Sun Feb 8 23:37:10 2026 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=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1699352743; cv=none; d=zohomail.com; s=zohoarc; b=BGunnE6L3tpxCDYdlyL4eVViqKtWCOpg/gszBvp/wdOWDoDXFXRlo2bjGm+UppHbfPsWWo0i+HSMnI5HAbwoDISIkyT4ALc+OlF9UzeFxhkaT9tYxR/uUMH0I3P1esN8QY8RsEUHmjcgiw3LgdnEv+U+1if8m7SF01eMtzOIedo= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1699352743; h=Content-Type: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=Bpj29tXiqgLNxsD0wsJlUZ9eT5lcs0B4elp4WPlk0FM=; b=KU80Xx/IhGAwJPNxk4MrhM8XoC3YDP2RX2FD6P6UB+rhdRpbwvTCeKLzh3XvgQ/3h+ZaHnc+nWqroW0lnD9yZq06K9a4AQYyAqqric/6kpXBmRUIoYjsxVvVSJgdJVDj2duQ6A2flg4RYeIpGP6O62U5b5M4z0qGW2aQ7PDosO8= 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=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1699352743346112.84271860009903; Tue, 7 Nov 2023 02:25:43 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1r0J3I-00057k-J6; Tue, 07 Nov 2023 05:11:20 -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 1r0J3F-0004kF-H9 for qemu-devel@nongnu.org; Tue, 07 Nov 2023 05:11:17 -0500 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 1r0J3D-0002Vx-Px for qemu-devel@nongnu.org; Tue, 07 Nov 2023 05:11:17 -0500 Received: from mail-lj1-f198.google.com (mail-lj1-f198.google.com [209.85.208.198]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-60-wXL2WF9UMM-iZVzF8vUhJQ-1; Tue, 07 Nov 2023 05:11:07 -0500 Received: by mail-lj1-f198.google.com with SMTP id 38308e7fff4ca-2c50bebd8dfso53492471fa.3 for ; Tue, 07 Nov 2023 02:11:07 -0800 (PST) Received: from redhat.com ([2.55.5.143]) by smtp.gmail.com with ESMTPSA id l3-20020a05600c4f0300b003fc0505be19sm15233367wmq.37.2023.11.07.02.11.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Nov 2023 02:11:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1699351875; 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=Bpj29tXiqgLNxsD0wsJlUZ9eT5lcs0B4elp4WPlk0FM=; b=bag04e9Nu1VlbCffCFypqK+dj/T/K6iPGxjujrcM4v1b1edFIRc5lPWNuwki/okfSZXski VUNNdJUavYnUxLOvG0YHHtgiB4y71WpD3hAb6ROHmdWp1In11Qa6Yl9sSFN9c18mPc0Lxa Lqe068flOEYXOHwv+TcdcsrWV7UkM/o= X-MC-Unique: wXL2WF9UMM-iZVzF8vUhJQ-1 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1699351865; x=1699956665; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=Bpj29tXiqgLNxsD0wsJlUZ9eT5lcs0B4elp4WPlk0FM=; b=mx4kp/PBoKrB0AjXKZgzsbyuS38ngsMThj+BfIY4OemcbNS1zVnXeBvdTUvfzlrKCx Wy61xgXUgVDY3vyTWkV664887+Emm8VVFXgRwgmjxlqHj32U8N042FyeoWo+k1FWRWG4 jxQ31WmE+YGgHYv+/Q/nZAO0ne/nhQ9mkjNYCUimVh0TntBdHhf9cCpsFoYy3AOlynIq xoIBqcUqp87+y2ETiXMDNLZzZ7titD54iREbIDPEGnTSKrT/2AOfK24L67OWCMpUn29g DQzN6D9oHomufHYX5Pf98p3zASW5R4fMHBKYjwcRjk3owTzZ7FKQKjqmK6RglsK3Ntb+ cOpw== X-Gm-Message-State: AOJu0Yy32e/8NNzKbRJzYOOB3lN4SKZC6VClSPXwOVeg6MpZL0NR9UOq 57HWVXW03bIJjfzE6E6Vf9NE1szquArWjiuSl5eGtGOZ20pFcfQgyPPLzpKgP0svM7UbsUM0fl+ fyTVUczq07elfWvDDqfLzM4xblGl8gw/lUkr2DyRd6r9grLdRuwmfH0LBCsl3UnI4E/l+ X-Received: by 2002:a05:651c:3cf:b0:2c5:1f30:ebfc with SMTP id f15-20020a05651c03cf00b002c51f30ebfcmr23050911ljp.38.1699351865385; Tue, 07 Nov 2023 02:11:05 -0800 (PST) X-Google-Smtp-Source: AGHT+IHCUPlFMIO3qEUQ/ZSpq2ok2/OqNQOmKDBFrq3mrkbzCDuOR3Db6sa/FNZl25b6gW/wkw2pSg== X-Received: by 2002:a05:651c:3cf:b0:2c5:1f30:ebfc with SMTP id f15-20020a05651c03cf00b002c51f30ebfcmr23050894ljp.38.1699351864967; Tue, 07 Nov 2023 02:11:04 -0800 (PST) Date: Tue, 7 Nov 2023 05:11:01 -0500 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Cc: Peter Maydell , Hawkins Jiawei , Eugenio =?utf-8?B?UMOpcmV6?= , Jason Wang Subject: [PULL 21/63] vdpa: Add SetSteeringEBPF method for NetClientState Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent 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=170.10.133.124; envelope-from=mst@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, 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1699352744237100001 From: Hawkins Jiawei At present, to enable the VIRTIO_NET_F_RSS feature, eBPF must be loaded for the vhost backend. Given that vhost-vdpa is one of the vhost backend, we need to implement the SetSteeringEBPF method to support RSS for vhost-vdpa, even if vhost-vdpa calculates the rss hash in the hardware device instead of in the kernel by eBPF. Although this requires QEMU to be compiled with `--enable-bpf` configuration even if the vdpa device does not use eBPF to calculate the rss hash, this can avoid adding the specific conditional statements for vDPA case to enable the VIRTIO_NET_F_RSS feature, which reduces code maintainbility. Suggested-by: Eugenio P=C3=A9rez Signed-off-by: Hawkins Jiawei Message-Id: <280e20ddce55b6de60f1552ba0865bffffe909b2.1698195059.git.yin311= 49@gmail.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- net/vhost-vdpa.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index 54f748d49d..3466936b87 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -241,6 +241,12 @@ static void vhost_vdpa_cleanup(NetClientState *nc) } } =20 +/** Dummy SetSteeringEBPF to support RSS for vhost-vdpa backend */ +static bool vhost_vdpa_set_steering_ebpf(NetClientState *nc, int prog_fd) +{ + return true; +} + static bool vhost_vdpa_has_vnet_hdr(NetClientState *nc) { assert(nc->info->type =3D=3D NET_CLIENT_DRIVER_VHOST_VDPA); @@ -423,6 +429,7 @@ static NetClientInfo net_vhost_vdpa_info =3D { .has_vnet_hdr =3D vhost_vdpa_has_vnet_hdr, .has_ufo =3D vhost_vdpa_has_ufo, .check_peer_type =3D vhost_vdpa_check_peer_type, + .set_steering_ebpf =3D vhost_vdpa_set_steering_ebpf, }; =20 static int64_t vhost_vdpa_get_vring_group(int device_fd, unsigned vq_index, @@ -1258,6 +1265,7 @@ static NetClientInfo net_vhost_vdpa_cvq_info =3D { .has_vnet_hdr =3D vhost_vdpa_has_vnet_hdr, .has_ufo =3D vhost_vdpa_has_ufo, .check_peer_type =3D vhost_vdpa_check_peer_type, + .set_steering_ebpf =3D vhost_vdpa_set_steering_ebpf, }; =20 /* --=20 MST