{"id":2225306,"url":"http://patchwork.ozlabs.org/api/patches/2225306/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260420200339.708640-14-vsementsov@yandex-team.ru/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260420200339.708640-14-vsementsov@yandex-team.ru>","list_archive_url":null,"date":"2026-04-20T20:03:28","name":"[v6,13/22] vhost: move vrings mapping to the top of vhost_virtqueue_start()","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"b6da4f38aecd2c8ba5cba461b6624885477ddf9d","submitter":{"id":84116,"url":"http://patchwork.ozlabs.org/api/people/84116/?format=json","name":"Vladimir Sementsov-Ogievskiy","email":"vsementsov@yandex-team.ru"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260420200339.708640-14-vsementsov@yandex-team.ru/mbox/","series":[{"id":500672,"url":"http://patchwork.ozlabs.org/api/series/500672/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=500672","date":"2026-04-20T20:03:18","name":"vhost refactoring and fixes","version":6,"mbox":"http://patchwork.ozlabs.org/series/500672/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2225306/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2225306/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=yandex-team.ru header.i=@yandex-team.ru\n header.a=rsa-sha256 header.s=default header.b=sptKxpIc;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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Mon, 20 Apr 2026 16:04:12 -0400","from mail-nwsmtp-smtp-corp-main-68.klg.yp-c.yandex.net\n (mail-nwsmtp-smtp-corp-main-68.klg.yp-c.yandex.net\n [IPv6:2a02:6b8:c42:94a9:0:640:a3fa:0])\n by forwardcorp1d.mail.yandex.net (Yandex) with ESMTPS id 0868A8071E;\n Mon, 20 Apr 2026 23:04:09 +0300 (MSK)","from vsementsov-lin (unknown [2a02:6bf:8080:54b::1:34])\n by mail-nwsmtp-smtp-corp-main-68.klg.yp-c.yandex.net (smtpcorp) with ESMTPSA\n id f3YMX10K1Sw0-CjCKRb82; Mon, 20 Apr 2026 23:04:08 +0300"],"Precedence":"bulk","X-Yandex-Fwd":"1","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex-team.ru;\n s=default; t=1776715448;\n bh=XocdcTcecnBxB/Sds6p3bzMTQMvxaXfbHbggfQ8XQGg=;\n h=Message-ID:Date:In-Reply-To:Cc:Subject:References:To:From;\n b=sptKxpIcclktT0cPCdkVSNOgpmjwrIoFuvJW7ZwXn1CkT6AX+nEsAV3EvvhmgiG5A\n OpBEmotuXWYgTi6V7WMl3N12q2B4lUcAE5fCwoGZXd/eUFbCM6IGdxxwq5lA+Dn/g1\n auyez3TtaeLBJxK3Kyv6L/aiQcdQcup3AdtpQ3Jo=","From":"Vladimir Sementsov-Ogievskiy ","To":"mst@redhat.com","Cc":"sgarzare@redhat.com, raphael@enfabrica.net, qemu-devel@nongnu.org,\n vsementsov@yandex-team.ru, yc-core@yandex-team.ru,\n d-tatianin@yandex-team.ru, Raphael Norwitz ","Subject":"[PATCH v6 13/22] vhost: move vrings mapping to the top of\n vhost_virtqueue_start()","Date":"Mon, 20 Apr 2026 23:03:28 +0300","Message-ID":"<20260420200339.708640-14-vsementsov@yandex-team.ru>","X-Mailer":"git-send-email 2.52.0","In-Reply-To":"<20260420200339.708640-1-vsementsov@yandex-team.ru>","References":"<20260420200339.708640-1-vsementsov@yandex-team.ru>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Received-SPF":"pass client-ip=178.154.239.200;\n envelope-from=vsementsov@yandex-team.ru; helo=forwardcorp1d.mail.yandex.net","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, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001,\n 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","List-Id":"qemu development ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"This simplifies further refactoring and final introduction\nof vhost backend live migration.\n\nSigned-off-by: Vladimir Sementsov-Ogievskiy \nReviewed-by: Raphael Norwitz \nReviewed-by: Daniil Tatianin \n---\n hw/virtio/vhost.c | 45 ++++++++++++++++++++++-----------------------\n 1 file changed, 22 insertions(+), 23 deletions(-)","diff":"diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c\nindex f43e563f0de..d5bafbcc4b3 100644\n--- a/hw/virtio/vhost.c\n+++ b/hw/virtio/vhost.c\n@@ -1303,29 +1303,6 @@ int vhost_virtqueue_start(struct vhost_dev *dev,\n return 0;\n }\n \n- vq->num = state.num = virtio_queue_get_num(vdev, idx);\n- r = dev->vhost_ops->vhost_set_vring_num(dev, &state);\n- if (r) {\n- VHOST_OPS_DEBUG(r, \"vhost_set_vring_num failed\");\n- return r;\n- }\n-\n- state.num = virtio_queue_get_last_avail_idx(vdev, idx);\n- r = dev->vhost_ops->vhost_set_vring_base(dev, &state);\n- if (r) {\n- VHOST_OPS_DEBUG(r, \"vhost_set_vring_base failed\");\n- return r;\n- }\n-\n- if (vhost_needs_vring_endian(vdev)) {\n- r = vhost_virtqueue_set_vring_endian_legacy(dev,\n- virtio_vdev_is_big_endian(vdev),\n- vhost_vq_index);\n- if (r) {\n- return r;\n- }\n- }\n-\n l = vq->desc_size;\n vq->desc = vhost_memory_map(dev, vq->desc_phys, l, false);\n if (!vq->desc) {\n@@ -1347,6 +1324,28 @@ int vhost_virtqueue_start(struct vhost_dev *dev,\n goto fail;\n }\n \n+ vq->num = state.num = virtio_queue_get_num(vdev, idx);\n+ r = dev->vhost_ops->vhost_set_vring_num(dev, &state);\n+ if (r) {\n+ VHOST_OPS_DEBUG(r, \"vhost_set_vring_num failed\");\n+ goto fail;\n+ }\n+\n+ state.num = virtio_queue_get_last_avail_idx(vdev, idx);\n+ r = dev->vhost_ops->vhost_set_vring_base(dev, &state);\n+ if (r) {\n+ VHOST_OPS_DEBUG(r, \"vhost_set_vring_base failed\");\n+ goto fail;\n+ }\n+\n+ if (vhost_needs_vring_endian(vdev)) {\n+ r = vhost_virtqueue_set_vring_endian_legacy(\n+ dev, virtio_vdev_is_big_endian(vdev), vhost_vq_index);\n+ if (r) {\n+ goto fail;\n+ }\n+ }\n+\n r = vhost_virtqueue_set_addr(dev, vq, vhost_vq_index, dev->log_enabled);\n if (r < 0) {\n goto fail;\n","prefixes":["v6","13/22"]}