From patchwork Fri Aug 11 15:28:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Hawkins Jiawei X-Patchwork-Id: 13351013 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 89306C41513 for ; Fri, 11 Aug 2023 15:29:29 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qUU4k-0003NU-D2; Fri, 11 Aug 2023 11:29:18 -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 1qUU4V-0003KH-7P for qemu-devel@nongnu.org; Fri, 11 Aug 2023 11:29:03 -0400 Received: from mail-pf1-x429.google.com ([2607:f8b0:4864:20::429]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qUU4S-0001ZP-TU for qemu-devel@nongnu.org; Fri, 11 Aug 2023 11:29:02 -0400 Received: by mail-pf1-x429.google.com with SMTP id d2e1a72fcca58-686f38692b3so1911370b3a.2 for ; Fri, 11 Aug 2023 08:28:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1691767738; x=1692372538; 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=G4lniF7wupK5k//ouvNO3aQ67CFpv2Z9I/33Tzs/oFA=; b=Pd1st+bmw8V0466PJDx52eLUqJNwOe4O6Jm0gmdTOLoUkM2ClEp3wZKjBBJ4jhvZdq ghBncBUAzP2jQ7mLKk0doMtHei4Uwm4L266f3HgFMTHYuhGTKwOh9LSI8z0gYE9WPgba eAzK0zBYwAgHycb4shz3a9Eflmb8fTSxOQYoaA5JVBBskM2xBTbiWqKXZlgHC0hL64qs 2UlGGVI8aFfn3QpvLQhyCIGggi/pWBL89WiPTeLjDVfp20Jvwtlj5wnC0VTUtNlpH6cA WnXJ4cMj2nOBLJxVRYfR/yOk1WiyqGsxN5ySnRPlLKUqpypu0AQYZkbYlm6p8rpk3BP2 qTVQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691767738; x=1692372538; 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=G4lniF7wupK5k//ouvNO3aQ67CFpv2Z9I/33Tzs/oFA=; b=S0wVTz9HQDtiTGkgDz26H/udAy7yFZqNb0zDVI7/Z9Cc+yxEOYDKjBbiBz1gGUJXaS W7fJM9TcLG9nUAye51wGp+QbCj0W/EbPsDU8VLf/DiXB+XD9ZWye9687DYoDYe6/vXsI oKNlZvf9MXSkuhabUekDw5pLIcxeZE6UElSGQuK0IYuWfmJCQplXtKGBSrzlV//S4YAE PCIJzay8CpQmplColYPXhiNsu8TWoV3zg8Y9ipaVU5zYAnr6Kiij2KZQ4D2bqvpnFni+ +kCERCDC5ovgCoCY9HoKKSwxXb6krpLPL3KVlVLaz2P5NBUJb/6piH9Q+7cKD8aO8PHC yRyg== X-Gm-Message-State: AOJu0YyqDu7TSAXxNCaAmseGvruSo/8OP5Qt1sr+ReKPlWuheLC9eSKa AP3hmyvKOlOKZEOGdjlntdk= X-Google-Smtp-Source: AGHT+IF1yKFCQ66/5JCBW2N6YYOz+612z0V8h1hg65m+Uh1pF3GURlJXWy5cHC4F46mirugZgLzAmw== X-Received: by 2002:a05:6a00:1942:b0:682:2fea:39f0 with SMTP id s2-20020a056a00194200b006822fea39f0mr2964424pfk.5.1691767736368; Fri, 11 Aug 2023 08:28:56 -0700 (PDT) Received: from localhost ([183.242.254.166]) by smtp.gmail.com with ESMTPSA id a26-20020aa7865a000000b00663b712bfbdsm3452058pfo.57.2023.08.11.08.28.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 11 Aug 2023 08:28:56 -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: [RFC PATCH 1/3] vdpa: Add SetSteeringEBPF method for NetClientState Date: Fri, 11 Aug 2023 23:28:42 +0800 Message-Id: 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::429; envelope-from=yin31149@gmail.com; helo=mail-pf1-x429.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 --- net/vhost-vdpa.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index a13b267250..4c8e4b19f6 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -238,6 +238,12 @@ 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); @@ -400,6 +406,7 @@ 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, @@ -1215,6 +1222,7 @@ 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, }; /*