From patchwork Tue Jun 4 07:37:47 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Wang X-Patchwork-Id: 13684849 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 DA599C25B7E for ; Tue, 4 Jun 2024 07:40:00 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sEOkr-0000Qy-9O; Tue, 04 Jun 2024 03:38:49 -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 1sEOkm-0000Eo-3p for qemu-devel@nongnu.org; Tue, 04 Jun 2024 03:38:45 -0400 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 1sEOkk-0006N9-A3 for qemu-devel@nongnu.org; Tue, 04 Jun 2024 03:38:43 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1717486721; 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=cJVv+oCbFw6Y7FzevSXtTHQbytAJmfbo76uiroB2Js8=; b=ZuH7f1kgyR2XRxtwv6NGSpQ6f8AOAe9LTwE88EVjMWoE/ttN/pz+czjbC3w8pCax2LjyQo 1HsVvEnXAaumIb2hBqAhdPPEoLwCSIVNd0nSitrvv6lBSuDinNi4PsB6M/VYKSO519tEWW saUK2pr/w40l59bXJbakXNgQ5NCZWh8= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-306-F2n0NBu0PrCm5NoMcRRolw-1; Tue, 04 Jun 2024 03:38:36 -0400 X-MC-Unique: F2n0NBu0PrCm5NoMcRRolw-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (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 mimecast-mx02.redhat.com (Postfix) with ESMTPS id 72B5328C9822; Tue, 4 Jun 2024 07:38:36 +0000 (UTC) Received: from localhost.localdomain (unknown [10.72.112.238]) by smtp.corp.redhat.com (Postfix) with ESMTP id 681E4492BD4; Tue, 4 Jun 2024 07:38:34 +0000 (UTC) From: Jason Wang To: peter.maydell@linaro.org, qemu-devel@nongnu.org Cc: Akihiko Odaki , Jason Wang Subject: [PULL 12/20] virtio-net: Unify the logic to update NIC state for RSS Date: Tue, 4 Jun 2024 15:37:47 +0800 Message-ID: <20240604073755.1859-13-jasowang@redhat.com> In-Reply-To: <20240604073755.1859-1-jasowang@redhat.com> References: <20240604073755.1859-1-jasowang@redhat.com> MIME-Version: 1.0 Content-type: text/plain X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.10 Received-SPF: pass client-ip=170.10.133.124; envelope-from=jasowang@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_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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Akihiko Odaki The code to attach or detach the eBPF program to RSS were duplicated so unify them into one function to save some code. Signed-off-by: Akihiko Odaki Signed-off-by: Jason Wang --- hw/net/virtio-net.c | 90 ++++++++++++++++++--------------------------- 1 file changed, 36 insertions(+), 54 deletions(-) diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index 345ef9a8fd..8464eb4082 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -1232,18 +1232,6 @@ static int virtio_net_handle_announce(VirtIONet *n, uint8_t cmd, } } -static void virtio_net_detach_epbf_rss(VirtIONet *n); - -static void virtio_net_disable_rss(VirtIONet *n) -{ - if (n->rss_data.enabled) { - trace_virtio_net_rss_disable(); - } - n->rss_data.enabled = false; - - virtio_net_detach_epbf_rss(n); -} - static bool virtio_net_attach_ebpf_to_backend(NICState *nic, int prog_fd) { NetClientState *nc = qemu_get_peer(qemu_get_queue(nic), 0); @@ -1291,6 +1279,40 @@ static void virtio_net_detach_epbf_rss(VirtIONet *n) virtio_net_attach_ebpf_to_backend(n->nic, -1); } +static void virtio_net_commit_rss_config(VirtIONet *n) +{ + if (n->rss_data.enabled) { + n->rss_data.enabled_software_rss = n->rss_data.populate_hash; + if (n->rss_data.populate_hash) { + virtio_net_detach_epbf_rss(n); + } else if (!virtio_net_attach_epbf_rss(n)) { + if (get_vhost_net(qemu_get_queue(n->nic)->peer)) { + warn_report("Can't load eBPF RSS for vhost"); + } else { + warn_report("Can't load eBPF RSS - fallback to software RSS"); + n->rss_data.enabled_software_rss = true; + } + } + + trace_virtio_net_rss_enable(n->rss_data.hash_types, + n->rss_data.indirections_len, + sizeof(n->rss_data.key)); + } else { + virtio_net_detach_epbf_rss(n); + trace_virtio_net_rss_disable(); + } +} + +static void virtio_net_disable_rss(VirtIONet *n) +{ + if (!n->rss_data.enabled) { + return; + } + + n->rss_data.enabled = false; + virtio_net_commit_rss_config(n); +} + static bool virtio_net_load_ebpf_fds(VirtIONet *n) { int fds[EBPF_RSS_MAX_FDS] = { [0 ... EBPF_RSS_MAX_FDS - 1] = -1}; @@ -1455,28 +1477,7 @@ static uint16_t virtio_net_handle_rss(VirtIONet *n, goto error; } n->rss_data.enabled = true; - - 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; - } - /* fallback to software RSS */ - warn_report("Can't load eBPF RSS - fallback to software RSS"); - n->rss_data.enabled_software_rss = 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 = true; - } - - trace_virtio_net_rss_enable(n->rss_data.hash_types, - n->rss_data.indirections_len, - temp.b); + virtio_net_commit_rss_config(n); return queue_pairs; error: trace_virtio_net_rss_error(err_msg, err_value); @@ -3076,26 +3077,7 @@ static int virtio_net_post_load_device(void *opaque, int version_id) } } - if (n->rss_data.enabled) { - n->rss_data.enabled_software_rss = n->rss_data.populate_hash; - if (!n->rss_data.populate_hash) { - if (!virtio_net_attach_epbf_rss(n)) { - if (get_vhost_net(qemu_get_queue(n->nic)->peer)) { - warn_report("Can't post-load eBPF RSS for vhost"); - } else { - warn_report("Can't post-load eBPF RSS - " - "fallback to software RSS"); - n->rss_data.enabled_software_rss = true; - } - } - } - - trace_virtio_net_rss_enable(n->rss_data.hash_types, - n->rss_data.indirections_len, - sizeof(n->rss_data.key)); - } else { - trace_virtio_net_rss_disable(); - } + virtio_net_commit_rss_config(n); return 0; }