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GET /api/1.1/patches/2228956/?format=api
{ "id": 2228956, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2228956/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260427144746.1498-1-kshk@linux.ibm.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.1/projects/14/?format=api", "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": "" }, "msgid": "<20260427144746.1498-1-kshk@linux.ibm.com>", "date": "2026-04-27T14:47:46", "name": "[v3] vdpa: Allow VDPA to work on big-endian machine", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "c1b16ab2a2044a31cee14d05ca200b42c5e8e40b", "submitter": { "id": 90249, "url": "http://patchwork.ozlabs.org/api/1.1/people/90249/?format=api", "name": "Konstantin Shkolnyy", "email": "kshk@linux.ibm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260427144746.1498-1-kshk@linux.ibm.com/mbox/", "series": [ { "id": 501665, "url": "http://patchwork.ozlabs.org/api/1.1/series/501665/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=501665", "date": "2026-04-27T14:47:46", "name": "[v3] vdpa: Allow VDPA to work on big-endian machine", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/501665/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2228956/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2228956/checks/", "tags": {}, "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256\n header.s=pp1 header.b=mQ2aaUdr;\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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a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc\n :content-transfer-encoding:content-type:date:from:message-id\n :mime-version:subject:to; s=pp1; bh=Wbm9LDXAHQQvQKBXhuN9AQj/hnNB\n mHIVoSwTMHLCPu4=; b=mQ2aaUdrw6tmMBVQ66AggxBPvYk6iSs1cJlvYxJjm3pb\n QqQ3Ldwm/0B8g6F6Wai4VXTtzqrLDOV0KGOWIotDWfTCfJaHclcUsnSaDJbV8Dy7\n IfTdhcjLnRqnLtdo6o090oCz8fdSeRqGde/VUBFbHWjNUuv23JyKMTc8Nk3RjMGt\n Z5W18BBKjtUwoeeMn/ti87I+GaZWMpdFUmQ7V+BTuHiuZEcIDKdLqUakUYQQVO5M\n FcgDkI/oxOOsH/5gU9w9f7DZ5MtNYTbF5pISl1tVi4k9Acs5AT41rQsBFUTyPAky\n uz1qSi4XzL9aOTad7QxQZDD52wqCHHKjYuinga6vQw==", "From": "Konstantin Shkolnyy <kshk@linux.ibm.com>", "To": "mst@redhat.com, sgarzare@redhat.com, jasowang@redhat.com,\n qemu-devel@nongnu.org", "Cc": "mjrosato@linux.ibm.com, Konstantin Shkolnyy <kshk@linux.ibm.com>,\n\t=?utf-8?q?Eugenio_P=C3=A9rez?= <eperezma@redhat.com>,\n Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>", "Subject": "[PATCH v3] vdpa: Allow VDPA to work on big-endian machine", "Date": "Mon, 27 Apr 2026 09:47:46 -0500", "Message-Id": "<20260427144746.1498-1-kshk@linux.ibm.com>", "X-Mailer": "git-send-email 2.34.1", "MIME-Version": "1.0", "Content-Type": "text/plain; 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envelope-from=kshk@linux.ibm.com;\n helo=mx0a-001b2d01.pphosted.com", "X-Spam_score_int": "-26", "X-Spam_score": "-2.7", "X-Spam_bar": "--", "X-Spam_report": "(-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7,\n RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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 <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "After commit 0caed25cd171 vhost_vdpa_net_load_vlan() started seeing\nVIRTIO_NET_F_CTRL_VLAN flag and making 4096 calls to the kernel with\nVIRTIO_NET_CTRL_VLAN_ADD command. However, it forgot to convert the\n16-bit VLAN IDs to LE format. On BE machine, the kernel calls failed\nwhen they saw \"VLAN IDs\" greater than 4095, and QEMU then said:\n\"unable to start vhost net: 5: falling back on userspace virtio\", and\nVDPA became disabled.\n\nConvert the VLAN ID to LE before putting it into virtio queue.\n\nFixes: 8f7e9967484d (\"vdpa: Restore vlan filtering state\")\nSigned-off-by: Konstantin Shkolnyy <kshk@linux.ibm.com>\nAcked-by: Jason Wang <jasowang@redhat.com>\nAcked-by: Eugenio Pérez <eperezma@redhat.com>\nReviewed-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>\n---\nThis patch was reviewed several months ago but was never applied. Resending...\nChanges in v3:\n - Add Reviewed-by: Akihiko Odaki.\n---\n net/vhost-vdpa.c | 5 +++--\n 1 file changed, 3 insertions(+), 2 deletions(-)", "diff": "diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c\nindex 3df6091274..f1523697e2 100644\n--- a/net/vhost-vdpa.c\n+++ b/net/vhost-vdpa.c\n@@ -1200,9 +1200,10 @@ static int vhost_vdpa_net_load_single_vlan(VhostVDPAState *s,\n struct iovec *in_cursor,\n uint16_t vid)\n {\n+ uint16_t vid_le = cpu_to_le16(vid);\n const struct iovec data = {\n- .iov_base = &vid,\n- .iov_len = sizeof(vid),\n+ .iov_base = &vid_le,\n+ .iov_len = sizeof(vid_le),\n };\n ssize_t r = vhost_vdpa_net_load_cmd(s, out_cursor, in_cursor,\n VIRTIO_NET_CTRL_VLAN,\n", "prefixes": [ "v3" ] }