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GET /api/1.0/patches/2198137/?format=api
{ "id": 2198137, "url": "http://patchwork.ozlabs.org/api/1.0/patches/2198137/?format=api", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.0/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": "<20260219130334.787858-6-aesteve@redhat.com>", "date": "2026-02-19T13:03:32", "name": "[v13,5/7] vhost_user.rst: Add GET_SHMEM_CONFIG message", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "7bc35e73e5c17ced3a9a2e01f594942611d41b65", "submitter": { "id": 85915, "url": "http://patchwork.ozlabs.org/api/1.0/people/85915/?format=api", "name": "Albert Esteve", "email": "aesteve@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260219130334.787858-6-aesteve@redhat.com/mbox/", "series": [ { "id": 492672, "url": "http://patchwork.ozlabs.org/api/1.0/series/492672/?format=api", "date": "2026-02-19T13:03:27", "name": "vhost-user: Add SHMEM_MAP/UNMAP requests", "version": 13, "mbox": "http://patchwork.ozlabs.org/series/492672/mbox/" } ], "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2198137/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 (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=I1bgcUaD;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists.gnu.org (lists.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fGtr846mFz1xvg\n\tfor <incoming@patchwork.ozlabs.org>; Fri, 20 Feb 2026 00:04:24 +1100 (AEDT)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1vt3he-0007mU-9d; Thu, 19 Feb 2026 08:04:22 -0500", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <aesteve@redhat.com>)\n id 1vt3hc-0007kq-Op\n for qemu-devel@nongnu.org; Thu, 19 Feb 2026 08:04:20 -0500", "from us-smtp-delivery-124.mimecast.com ([170.10.133.124])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <aesteve@redhat.com>)\n id 1vt3hb-0006MT-90\n for qemu-devel@nongnu.org; Thu, 19 Feb 2026 08:04:20 -0500", "from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com\n (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by\n relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3,\n cipher=TLS_AES_256_GCM_SHA384) id us-mta-20-HdoW9l_pNcqDTN0Bv9KX4Q-1; Thu,\n 19 Feb 2026 08:04:17 -0500", "from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com\n (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12])\n (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest\n SHA256)\n (No client certificate requested)\n by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS\n id BDA1D18003F5; Thu, 19 Feb 2026 13:04:15 +0000 (UTC)", "from fedora.redhat.com (unknown [10.44.33.19])\n by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP\n id 053D01955F01; Thu, 19 Feb 2026 13:04:09 +0000 (UTC)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n s=mimecast20190719; t=1771506258;\n h=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n to:to:cc:cc:mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=yyDa7teFs3XNo1ZG08MyPTV0M6neQyqQ5iHgVisLshA=;\n b=I1bgcUaDvlY+Cy8sgyXgQLqHgE3rS2jt60mzudvjpaniMEap/kLASaws8NauzhqbxC+NYD\n UHGPRzknpLspx3BWWIe2nFhgS7x2xriz4WQuGLeUtCpJQ+ERUJ/pK+PSi5ftNIUhhALJAr\n 14rkdwbv19VbUh7lrKn0ThWJv/GN18g=", "X-MC-Unique": "HdoW9l_pNcqDTN0Bv9KX4Q-1", "X-Mimecast-MFC-AGG-ID": "HdoW9l_pNcqDTN0Bv9KX4Q_1771506256", "From": "Albert Esteve <aesteve@redhat.com>", "To": "qemu-devel@nongnu.org", "Cc": "Peter Xu <peterx@redhat.com>,\n Pierrick Bouvier <pierrick.bouvier@linaro.org>, mst@redhat.com,\n dbassey@redhat.com,\n =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= <philmd@linaro.org>, =?utf-8?q?Alex?=\n\t=?utf-8?q?_Benn=C3=A9e?= <alex.bennee@linaro.org>,\n Paolo Bonzini <pbonzini@redhat.com>, Fabiano Rosas <farosas@suse.de>,\n stefanha@redhat.com, manos.pitsidianakis@linaro.org,\n Stefano Garzarella <sgarzare@redhat.com>, jasowang@redhat.com,\n Laurent Vivier <lvivier@redhat.com>, slp@redhat.com, hi@alyssa.is,\n stevensd@chromium.org", "Subject": "[PATCH v13 5/7] vhost_user.rst: Add GET_SHMEM_CONFIG message", "Date": "Thu, 19 Feb 2026 14:03:32 +0100", "Message-ID": "<20260219130334.787858-6-aesteve@redhat.com>", "In-Reply-To": "<20260219130334.787858-1-aesteve@redhat.com>", "References": "<20260219130334.787858-1-aesteve@redhat.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Scanned-By": "MIMEDefang 3.0 on 10.30.177.12", "Received-SPF": "pass client-ip=170.10.133.124; envelope-from=aesteve@redhat.com;\n 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=-0.045,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001,\n RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001,\n SPF_HELO_PASS=-0.001, 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": "Add GET_SHMEM_CONFIG vhost-user frontend\nmessage to the spec documentation.\n\nReviewed-by: Alyssa Ross <hi@alyssa.is>\nReviewed-by: Stefan Hajnoczi <stefanha@redhat.com>\nSigned-off-by: Albert Esteve <aesteve@redhat.com>\n---\n docs/interop/vhost-user.rst | 39 +++++++++++++++++++++++++++++++++++++\n 1 file changed, 39 insertions(+)", "diff": "diff --git a/docs/interop/vhost-user.rst b/docs/interop/vhost-user.rst\nindex ae4ad6f441..77a763c7c3 100644\n--- a/docs/interop/vhost-user.rst\n+++ b/docs/interop/vhost-user.rst\n@@ -371,6 +371,22 @@ MMAP request\n - 0: Pages are mapped read-only\n - 1: Pages are mapped read-write\n \n+VIRTIO Shared Memory Region configuration\n+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n+\n++-------------+---------+------------+----+--------------+\n+| num regions | padding | mem size 0 | .. | mem size 255 |\n++-------------+---------+------------+----+--------------+\n+\n+:num regions: a 32-bit number of regions\n+\n+:padding: 32-bit\n+\n+:mem size: an array of 256 64-bit fields representing the size of each\n+ VIRTIO Shared Memory Region. ``num regions`` specifies the\n+ number of valid regions (non-zero size). The array index\n+ corresponds to the shared memory ID (shmid).\n+\n C structure\n -----------\n \n@@ -397,6 +413,7 @@ In QEMU the vhost-user message is implemented with the following struct:\n VhostUserShared object;\n VhostUserTransferDeviceState transfer_state;\n VhostUserMMap mmap;\n+ VhostUserShMemConfig shmem;\n };\n } QEMU_PACKED VhostUserMsg;\n \n@@ -1761,6 +1778,28 @@ Front-end message types\n Using this function requires prior negotiation of the\n ``VHOST_USER_PROTOCOL_F_DEVICE_STATE`` feature.\n \n+``VHOST_USER_GET_SHMEM_CONFIG``\n+ :id: 44\n+ :equivalent ioctl: N/A\n+ :request payload: N/A\n+ :reply payload: ``struct VhostUserShMemConfig``\n+\n+ When the ``VHOST_USER_PROTOCOL_F_SHMEM`` protocol feature has been\n+ successfully negotiated, this message can be submitted by the front-end\n+ to gather the VIRTIO Shared Memory Region configuration. The back-end will\n+ respond with the number of VIRTIO Shared Memory Regions it requires, and\n+ each shared memory region size in an array. The shared memory IDs are\n+ represented by the array index. The information returned shall comply\n+ with the following rules:\n+\n+ * The shared information will remain valid and unchanged for the entire\n+ lifetime of the connection.\n+\n+ * The Shared Memory Region size must be a multiple of the page size\n+ supported by mmap(2).\n+\n+ * The size may be 0 if the region is unused.\n+\n Back-end message types\n ----------------------\n \n", "prefixes": [ "v13", "5/7" ] }