From mboxrd@z Thu Jan 1 00:00:00 1970 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 BCF68C433EF for ; Mon, 18 Jul 2022 13:54:17 +0000 (UTC) Received: from localhost ([::1]:41004 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oDRCS-0007JV-N4 for qemu-devel@archiver.kernel.org; Mon, 18 Jul 2022 09:54:16 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37328) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oDOpl-0007Qr-Hl for qemu-devel@nongnu.org; Mon, 18 Jul 2022 07:22:41 -0400 Received: from out30-57.freemail.mail.aliyun.com ([115.124.30.57]:58513) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oDOpf-0000hz-UH for qemu-devel@nongnu.org; Mon, 18 Jul 2022 07:22:40 -0400 X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R191e4; CH=green; DM=||false|; DS=||; FP=0|-1|-1|-1|0|-1|-1|-1; HT=ay29a033018046051; MF=kangjie.xu@linux.alibaba.com; NM=1; PH=DS; RN=5; SR=0; TI=SMTPD_---0VJjIA67_1658143033; Received: from localhost(mailfrom:kangjie.xu@linux.alibaba.com fp:SMTPD_---0VJjIA67_1658143033) by smtp.aliyun-inc.com; Mon, 18 Jul 2022 19:17:13 +0800 From: Kangjie Xu To: qemu-devel@nongnu.org Cc: mst@redhat.com, jasowang@redhat.com, hengqi@linux.alibaba.com, xuanzhuo@linux.alibaba.com Subject: [PATCH 00/16] Support VIRTIO_F_RING_RESET for virtio-net and vhost-user in virtio pci Date: Mon, 18 Jul 2022 19:16:57 +0800 Message-Id: X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=115.124.30.57; envelope-from=kangjie.xu@linux.alibaba.com; helo=out30-57.freemail.mail.aliyun.com X-Spam_score_int: -98 X-Spam_score: -9.9 X-Spam_bar: --------- X-Spam_report: (-9.9 / 5.0 requ) BAYES_00=-1.9, ENV_AND_HDR_SPF_MATCH=-0.5, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01, UNPARSEABLE_RELAY=0.001, USER_IN_DEF_SPF_WL=-7.5 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Mon, 18 Jul 2022 09:49:04 -0400 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" The virtio queue reset function has already been defined in the virtio spec 1.2. The relevant virtio spec information is here: https://github.com/oasis-tcs/virtio-spec/issues/124 https://github.com/oasis-tcs/virtio-spec/issues/139 This patch set is to support this function in QEMU. It consists of two parts: virtio-net and vhost-user. The patches 1-7 are the implementation for virtio-net and the patches 8-16 are for vhost-user. The process of virt queue reset can be concluded as: 1. The virtqueue is disabled when VIRTIO_PCI_COMMON_Q_RESET is written. 2. Then the virtqueue is restarted after the information of vrings is passed to QEMU and VIRTIO_PCI_COMMON_Q_ENABLE is written. Test environment: Host: 5.4.189 Qemu: QEMU emulator version 7.0.50 Guest: 5.19.0-rc3 (With vq reset support) DPDK: 22.07-rc1 (With vq reset support) Test Cmd: ethtool -g eth1; ethtool -G eth1 rx $1 tx $2; ethtool -g eth1; The frontend can resize the virtio queue, then virtio queue reset function should be triggered. The default is split mode, modify Qemu virtio-net to add PACKED feature to test packed mode. Guest Kernel Patch: https://lore.kernel.org/bpf/20220629065656.54420-1-xuanzhuo@linux.alibaba.com/ DPDK Code: https://github.com/middaywords/dpdk/commit/098c8e1dfae10b747da8dd8950a82890efca7bee Please review. Thanks. Kangjie Xu (9): vhost: add op to enable or disable a single vring vhost-user: enable/disable a single vring vhost: extract the logic of unmapping the vrings and desc vhost: introduce restart and release for vhost_dev's vqs vhost-net: introduce restart and stop for vhost_net's vqs virtio: introduce queue_enable in virtio virtio-net: support queue_enable for vhost-user virtio-net: support queue_reset for vhost-user vhost-net: vq reset feature bit support Xuan Zhuo (7): virtio-pci: virtio_pci_common_cfg add queue_notify_data virtio: add VIRTIO_F_RING_RESET virtio: pci: virtio_pci_common_cfg add queue_reset virtio: introduce __virtio_queue_reset() virtio: introduce virtio_queue_reset() virtio-pci: support queue reset virtio-net: support queue reset hw/net/vhost_net.c | 56 ++++++++++++++++++ hw/net/virtio-net.c | 40 +++++++++++++ hw/virtio/vhost-user.c | 55 +++++++++++++++--- hw/virtio/vhost.c | 49 ++++++++++++++-- hw/virtio/virtio-pci.c | 17 ++++++ hw/virtio/virtio.c | 57 +++++++++++++------ include/hw/virtio/vhost-backend.h | 4 ++ include/hw/virtio/vhost.h | 6 ++ include/hw/virtio/virtio-pci.h | 1 + include/hw/virtio/virtio.h | 4 ++ include/net/vhost_net.h | 5 ++ .../standard-headers/linux/virtio_config.h | 5 ++ include/standard-headers/linux/virtio_pci.h | 4 ++ 13 files changed, 274 insertions(+), 29 deletions(-) -- 2.32.0