{"id":2225328,"url":"http://patchwork.ozlabs.org/api/patches/2225328/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260420202032.714884-8-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":"<20260420202032.714884-8-vsementsov@yandex-team.ru>","list_archive_url":null,"date":"2026-04-20T20:20:28","name":"[v2,07/10] vhost: stop reusing vq->desc (and friends) to store physical address","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"c1c5af91dc669313ccf536945592bc7a2e3931ca","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/20260420202032.714884-8-vsementsov@yandex-team.ru/mbox/","series":[{"id":500676,"url":"http://patchwork.ozlabs.org/api/series/500676/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=500676","date":"2026-04-20T20:20:24","name":"vhost-user: VHOST_USER_PROTOCOL_F_GPA_ADDRESSES","version":2,"mbox":"http://patchwork.ozlabs.org/series/500676/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2225328/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2225328/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=x03BX+IA;\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 16:20:49 -0400","from mail-nwsmtp-smtp-corp-main-80.iva.yp-c.yandex.net\n (mail-nwsmtp-smtp-corp-main-80.iva.yp-c.yandex.net\n [IPv6:2a02:6b8:c0c:c00c:0:640:e0de:0])\n by forwardcorp1d.mail.yandex.net (Yandex) with ESMTPS id 87DA980675;\n Mon, 20 Apr 2026 23:20:45 +0300 (MSK)","from vsementsov-lin (unknown [2a02:6bf:8080:54b::1:34])\n by mail-nwsmtp-smtp-corp-main-80.iva.yp-c.yandex.net (smtpcorp) with ESMTPSA\n id XKYwe10MOSw0-YFD9iBMD; Mon, 20 Apr 2026 23:20:44 +0300"],"X-Yandex-Fwd":"1","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex-team.ru;\n s=default; t=1776716444;\n bh=64+skN4vnGayFidRB2LVJGvoXm0N9ZAGQLAilmne80Y=;\n h=Message-ID:Date:In-Reply-To:Cc:Subject:References:To:From;\n b=x03BX+IAOhDhlQ++TT8lr+NhEVnfIfj04nWHQGTcI63Fqk+rDeOCknytXLRI9e5fD\n ly0N4gt5MM+nbTZZRAN4/HuTJ/x5liAK42jBPG4lY5t/ixO1IB1uHNKFLYFVwQInI9\n gX6YXFgG2LjpqmYkkKPgJFPFr67D3ojMfP9CKy7I=","From":"Vladimir Sementsov-Ogievskiy ","To":"mst@redhat.com","Cc":"sgarzare@redhat.com, qemu-devel@nongnu.org, vsementsov@yandex-team.ru,\n d-tatianin@yandex-team.ru","Subject":"[PATCH v2 07/10] vhost: stop reusing vq->desc (and friends) to store\n physical address","Date":"Mon, 20 Apr 2026 23:20:28 +0300","Message-ID":"<20260420202032.714884-8-vsementsov@yandex-team.ru>","X-Mailer":"git-send-email 2.52.0","In-Reply-To":"<20260420202032.714884-1-vsementsov@yandex-team.ru>","References":"<20260420202032.714884-1-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","Precedence":"list","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":"Remove the hack of storing physical addresses in vq->desc/avail/used\npointers when IOMMU is present. Instead, handle this case directly in\nvhost_virtqueue_set_addr() by checking for IOMMU presence.\n\nSigned-off-by: Vladimir Sementsov-Ogievskiy \n---\n hw/virtio/vhost.c | 5 +----\n 1 file changed, 1 insertion(+), 4 deletions(-)","diff":"diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c\nindex cc083572f40..6bb6b07e190 100644\n--- a/hw/virtio/vhost.c\n+++ b/hw/virtio/vhost.c\n@@ -518,9 +518,6 @@ static int vhost_vrings_map(struct vhost_dev *dev,\n }\n \n if (vhost_dev_has_iommu(dev)) {\n- vq->desc = (void *)(uintptr_t)vq->desc_phys;\n- vq->avail = (void *)(uintptr_t)vq->avail_phys;\n- vq->used = (void *)(uintptr_t)vq->used_phys;\n return 1;\n }\n \n@@ -1104,7 +1101,7 @@ static int vhost_virtqueue_set_addr(struct vhost_dev *dev,\n int r;\n memset(&addr, 0, sizeof(struct vhost_vring_addr));\n \n- if (phys) {\n+ if (phys || vhost_dev_has_iommu(dev)) {\n addr.desc_user_addr = (uint64_t)(unsigned long)vq->desc_phys;\n addr.avail_user_addr = (uint64_t)(unsigned long)vq->avail_phys;\n addr.used_user_addr = (uint64_t)(unsigned long)vq->used_phys;\n","prefixes":["v2","07/10"]}