From patchwork Wed Oct 25 01:08:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Hawkins Jiawei X-Patchwork-Id: 13435382 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 822FAC25B48 for ; Wed, 25 Oct 2023 01:09:04 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qvSNl-0000Un-Vl; Tue, 24 Oct 2023 21:08:26 -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 1qvSNk-0000Uc-Ib for qemu-devel@nongnu.org; Tue, 24 Oct 2023 21:08:24 -0400 Received: from mail-pj1-x102b.google.com ([2607:f8b0:4864:20::102b]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qvSNi-0008HE-Lj for qemu-devel@nongnu.org; Tue, 24 Oct 2023 21:08:24 -0400 Received: by mail-pj1-x102b.google.com with SMTP id 98e67ed59e1d1-27d45f5658fso4052462a91.3 for ; Tue, 24 Oct 2023 18:08:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1698196101; x=1698800901; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=XjAWBBVREFLGQjbMzAVjjp6ReJtDF1V6LPBKien9+Ys=; b=JOw0qGxUqAbpm2Aank4omBB1rcUkgMnFtc1iqjjJEqr406d1+P0l4L8t+bNccVctof rPEEqt0pNI7LjDlMo5Vw3byuBqyNjZaaQyA2YlBrgzGpNTuzbYOZwxrdYm3UzAe2gxbd GalTQQ1LRmvMsN+A3CEqLgQy5/riYcv+QvTIqvqKEjdy/lkdQycgQkQI0k5AArnq/hA3 Rzkz/boFUIyNDGNElEYtozfo4Sygousml5mvt5STIFr34WJj9ZXNgTuHI5wqqmsxSxvC LaETvL2BkPqgkmv9B3GOM3BeWwiy1XARxs3X7OdsfZbiYDGJGz1sGEDw1sMoaynw5UR/ 2VWg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698196101; x=1698800901; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=XjAWBBVREFLGQjbMzAVjjp6ReJtDF1V6LPBKien9+Ys=; b=LPITvGIMoP0u6unxiySXFXh/3mlYIjh4hIz98kb0ZRLPYxHMpezLX5AOgKFFzC9Kql bwmFtzK7iC7TMn//dYE81B9tWsQ0hLQLouHMhYUrnNcFv1TEP3p3is3L8O5BibuIoMXn WM73NdTw7idYoQGNQkCt2u1Abor3SNDZckOIEc1qz//89mVAnmIzg2QZoKQKcs6tTsBR MM8U1CSJFqIOo4/aQQhBfjBVIvJz+BEXHjYPfoclIaJ1Qe0+pEZ+HoSdFjPn9B6nxcbw XT8KL3yDOhbR3rDiZEllgwn1WQUduKXdFb6lDWkIoOQfvzwPqXI8VuKcHEs4JWd9Ekdf Piyg== X-Gm-Message-State: AOJu0YxTMzTmUbUHH5Es1XhK0JE+N8t2xey9MEyUQIO+oVldon3PJaqw jHfL2YZOVnZuj7zytjTjn7M= X-Google-Smtp-Source: AGHT+IFykQg0tQjXj5dEnPo9bPZiA1Qyp7NbFQe4sbkEHYjjkdNbM1Q+i3WaBatvUWps1B6xNYN05w== X-Received: by 2002:a17:90a:c202:b0:27d:af3:f15d with SMTP id e2-20020a17090ac20200b0027d0af3f15dmr12926771pjt.4.1698196100908; Tue, 24 Oct 2023 18:08:20 -0700 (PDT) Received: from localhost ([183.242.254.166]) by smtp.gmail.com with ESMTPSA id cx3-20020a17090afd8300b0027d1366d113sm9071899pjb.43.2023.10.24.18.08.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Oct 2023 18:08:20 -0700 (PDT) From: Hawkins Jiawei To: jasowang@redhat.com, mst@redhat.com, eperezma@redhat.com Cc: qemu-devel@nongnu.org, yin31149@gmail.com, 18801353760@163.com Subject: [PATCH v5 1/3] vdpa: Add SetSteeringEBPF method for NetClientState Date: Wed, 25 Oct 2023 09:08:04 +0800 Message-Id: <280e20ddce55b6de60f1552ba0865bffffe909b2.1698195059.git.yin31149@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::102b; envelope-from=yin31149@gmail.com; helo=mail-pj1-x102b.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org 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 Pérez Signed-off-by: Hawkins Jiawei --- v5: - no changes v4: https://lore.kernel.org/all/1c6faf4c5c3304c0bf14929143ccedb2e90dbcb2.1697904740.git.yin31149@gmail.com/ - no code changes v3: https://lore.kernel.org/all/30509e3c3b07bcadd95d5932aeb16820cb022902.1693299194.git.yin31149@gmail.com/ 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) } } +/** 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 == NET_CLIENT_DRIVER_VHOST_VDPA); @@ -423,6 +429,7 @@ static NetClientInfo net_vhost_vdpa_info = { .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, .has_ufo = vhost_vdpa_has_ufo, .check_peer_type = vhost_vdpa_check_peer_type, + .set_steering_ebpf = vhost_vdpa_set_steering_ebpf, }; 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 = { .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, .has_ufo = vhost_vdpa_has_ufo, .check_peer_type = vhost_vdpa_check_peer_type, + .set_steering_ebpf = vhost_vdpa_set_steering_ebpf, }; /*