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GET /api/patches/2216055/?format=api
{ "id": 2216055, "url": "http://patchwork.ozlabs.org/api/patches/2216055/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260325184259.366-10-alireza.sanaee@huawei.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/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": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260325184259.366-10-alireza.sanaee@huawei.com>", "list_archive_url": null, "date": "2026-03-25T18:42:57", "name": "[9/9] hw/cxl: Add QMP status query for dynamic-capacity extent release", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "2de4c55b1d4e3c0e2b787cfd3378bc792fd96b6d", "submitter": { "id": 90159, "url": "http://patchwork.ozlabs.org/api/people/90159/?format=api", "name": "Alireza Sanaee", "email": "alireza.sanaee@huawei.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260325184259.366-10-alireza.sanaee@huawei.com/mbox/", "series": [ { "id": 497484, "url": "http://patchwork.ozlabs.org/api/series/497484/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=497484", "date": "2026-03-25T18:42:48", "name": "Application Specific Tagged Memory Support in CXL Type 3 Devices", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/497484/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2216055/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2216055/checks/", "tags": {}, "related": [], "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 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 4fgwsJ4BHHz1xy3\n\tfor <incoming@patchwork.ozlabs.org>; Thu, 26 Mar 2026 05:48:20 +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 1w5TH4-00068g-Qp; Wed, 25 Mar 2026 14:48:14 -0400", "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 <alireza.sanaee@huawei.com>)\n id 1w5TH0-00063s-Ts\n for qemu-devel@nongnu.org; Wed, 25 Mar 2026 14:48:11 -0400", "from frasgout.his.huawei.com ([185.176.79.56])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <alireza.sanaee@huawei.com>)\n id 1w5TGw-0000Jm-IY\n for qemu-devel@nongnu.org; Wed, 25 Mar 2026 14:48:10 -0400", "from mail.maildlp.com (unknown [172.18.224.150])\n by frasgout.his.huawei.com (SkyGuard) with ESMTPS id 4fgwrq2fRtzJ469d;\n Thu, 26 Mar 2026 02:47:55 +0800 (CST)", "from dubpeml500005.china.huawei.com (unknown [7.214.145.207])\n by mail.maildlp.com (Postfix) with ESMTPS id 5254F4056B;\n Thu, 26 Mar 2026 02:48:04 +0800 (CST)", "from a2303103017.china.huawei.com (10.47.66.203) by\n dubpeml500005.china.huawei.com (7.214.145.207) with Microsoft SMTP Server\n (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id\n 15.2.1544.11; Wed, 25 Mar 2026 18:48:03 +0000" ], "To": "<qemu-devel@nongnu.org>", "CC": "<anisa.su@samsung.com>, <armbru@redhat.com>, <berrange@redhat.com>,\n <eblake@redhat.com>, <jonathan.cameron@huawei.com>,\n <linux-cxl@vger.kernel.org>, <linuxarm@huawei.com>, <lizhijian@fujitsu.com>,\n <mst@redhat.com>, <pbonzini@redhat.com>, <gourry@gourry.net>,\n <nifan.cxl@gmail.com>, <me@linux.beauty>", "Subject": "[PATCH 9/9] hw/cxl: Add QMP status query for dynamic-capacity extent\n release", "Date": "Wed, 25 Mar 2026 18:42:57 +0000", "Message-ID": "<20260325184259.366-10-alireza.sanaee@huawei.com>", "X-Mailer": "git-send-email 2.51.0.windows.2", "In-Reply-To": "<20260325184259.366-1-alireza.sanaee@huawei.com>", "References": "<20260325184259.366-1-alireza.sanaee@huawei.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-Originating-IP": "[10.47.66.203]", "X-ClientProxiedBy": "lhrpeml500011.china.huawei.com (7.191.174.215) To\n dubpeml500005.china.huawei.com (7.214.145.207)", "Received-SPF": "pass client-ip=185.176.79.56;\n envelope-from=alireza.sanaee@huawei.com; helo=frasgout.his.huawei.com", "X-Spam_score_int": "-41", "X-Spam_score": "-4.2", "X-Spam_bar": "----", "X-Spam_report": "(-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3,\n RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001,\n SPF_HELO_NONE=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>", "Reply-to": "Alireza Sanaee <alireza.sanaee@huawei.com>", "From": "Alireza Sanaee via qemu development <qemu-devel@nongnu.org>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "Add a small status query so orchestration layers can check whether a tagged\nextent is still pending, committed, or no longer present after a release\nrequest.\n\nIntroduce the ExtentStatus QAPI struct and the\ncxl-release-dynamic-capacity-status command.\n\nSigned-off-by: Alireza Sanaee <alireza.sanaee@huawei.com>\n---\n hw/mem/cxl_type3.c | 85 ++++++++++++++++++++++++++++++++++++++++\n hw/mem/cxl_type3_stubs.c | 10 +++++\n qapi/cxl.json | 46 ++++++++++++++++++++++\n 3 files changed, 141 insertions(+)", "diff": "diff --git a/hw/mem/cxl_type3.c b/hw/mem/cxl_type3.c\nindex d5fa8a530a..8999b36e61 100644\n--- a/hw/mem/cxl_type3.c\n+++ b/hw/mem/cxl_type3.c\n@@ -2635,6 +2635,91 @@ void cxl_remove_memory_alias(CXLType3Dev *dcd, struct CXLFixedWindow *fw,\n dcd->dc.direct_mr_bitmap &= ~(1u << hdm_id);\n }\n \n+/*\n+ * This function allows for a simple check to make sure that\n+ * our extent is removed. It can be used by an orchestration layer.\n+ */\n+ExtentStatus *\n+qmp_cxl_release_dynamic_capacity_status(const char *path,\n+ uint16_t hid, uint8_t rid,\n+ const char *tag,\n+ Error **errp)\n+{\n+ Object *obj;\n+ CXLType3Dev *dcd;\n+ CXLDCExtentList *list = NULL;\n+ CXLDCExtent *ent;\n+ QemuUUID uuid_req;\n+ ExtentStatus *res;\n+\n+ obj = object_resolve_path_type(path, TYPE_CXL_TYPE3, NULL);\n+ if (!obj) {\n+ error_setg(errp, \"Unable to resolve CXL type 3 device\");\n+ return NULL;\n+ }\n+\n+ dcd = CXL_TYPE3(obj);\n+ if (!dcd->dc.num_regions) {\n+ error_setg(errp, \"No dynamic capacity support from the device\");\n+ return NULL;\n+ }\n+\n+ if (rid >= dcd->dc.num_regions) {\n+ error_setg(errp, \"Region id is too large\");\n+ return NULL;\n+ }\n+\n+ if (!tag) {\n+ error_setg(errp, \"Tag must be valid\");\n+ return NULL;\n+ }\n+\n+ list = &dcd->dc.extents;\n+ qemu_uuid_parse(tag, &uuid_req);\n+ res = g_new0(ExtentStatus, 1);\n+\n+ /* Check committed extents */\n+ QTAILQ_FOREACH(ent, list, node) {\n+ QemuUUID uuid_ext;\n+ g_autofree char *uuid_str = NULL;\n+ memcpy(&uuid_ext.data, ent->tag, sizeof(ent->tag));\n+ if (qemu_uuid_is_equal(&uuid_req, &uuid_ext)) {\n+ uuid_str = qemu_uuid_unparse_strdup(&uuid_ext);\n+ res->status = g_strdup(\"Committed\");\n+ res->message =\n+ g_strdup_printf(\"Found committed extent with tag %s dpa 0x%\"\n+ PRIx64 \" len 0x%\" PRIx64,\n+ uuid_str, ent->start_dpa, ent->len);\n+ return res;\n+ }\n+ }\n+\n+ /* Check pending extents (not yet committed by kernel) */\n+ {\n+ CXLDCExtentGroup *group;\n+ QTAILQ_FOREACH(group, &dcd->dc.extents_pending, node) {\n+ QTAILQ_FOREACH(ent, &group->list, node) {\n+ QemuUUID uuid_ext;\n+ g_autofree char *uuid_str = NULL;\n+ memcpy(&uuid_ext.data, ent->tag, sizeof(ent->tag));\n+ if (qemu_uuid_is_equal(&uuid_req, &uuid_ext)) {\n+ uuid_str = qemu_uuid_unparse_strdup(&uuid_ext);\n+ res->status = g_strdup(\"Pending\");\n+ res->message =\n+ g_strdup_printf(\"Found pending extent with tag %s\"\n+ \" dpa 0x%\" PRIx64 \" len 0x%\" PRIx64,\n+ uuid_str, ent->start_dpa, ent->len);\n+ return res;\n+ }\n+ }\n+ }\n+ }\n+\n+ res->status = g_strdup(\"Released\");\n+ res->message = g_strdup_printf(\"Tag %s released or not found\", tag);\n+ return res;\n+}\n+\n static void ct3_class_init(ObjectClass *oc, const void *data)\n {\n DeviceClass *dc = DEVICE_CLASS(oc);\ndiff --git a/hw/mem/cxl_type3_stubs.c b/hw/mem/cxl_type3_stubs.c\nindex 98292a931c..17f9414142 100644\n--- a/hw/mem/cxl_type3_stubs.c\n+++ b/hw/mem/cxl_type3_stubs.c\n@@ -127,3 +127,13 @@ void qmp_cxl_release_dynamic_capacity(const char *path, uint16_t host_id,\n {\n error_setg(errp, \"CXL Type 3 support is not compiled in\");\n }\n+\n+ExtentStatus *qmp_cxl_release_dynamic_capacity_status(const char *path,\n+ uint16_t host_id,\n+ uint8_t region,\n+ const char *tag,\n+ Error **errp)\n+{\n+ error_setg(errp, \"CXL Type 3 support is not compiled in\");\n+ return NULL;\n+}\ndiff --git a/qapi/cxl.json b/qapi/cxl.json\nindex 81d6198ba0..53325ba530 100644\n--- a/qapi/cxl.json\n+++ b/qapi/cxl.json\n@@ -636,3 +636,49 @@\n },\n 'features': [ 'unstable' ]\n }\n+\n+##\n+# @ExtentStatus:\n+# This is an object that describes the status of an extent.\n+#\n+# @status: String indicating the overall result, e.g. \"success\".\n+# @message: Human-readable description of the outcome.\n+#\n+# Since: 9.1\n+##\n+{ 'struct': 'ExtentStatus',\n+ 'data': { 'status': 'str', 'message': 'str' }\n+}\n+\n+##\n+# @cxl-release-dynamic-capacity-status:\n+#\n+# This commands checks if an extent tag has been released or not.\n+#\n+# @path: path to the CXL Dynamic Capacity Device in the QOM tree.\n+#\n+# @host-id: The \"Host ID\" field as defined in Compute Express Link\n+# (CXL) Specification, Revision 3.1, Table 7-71.\n+#\n+# @region: The \"Region Number\" field as defined in Compute Express\n+# Link Specification, Revision 3.1, Table 7-71. Valid range\n+# is from 0-7.\n+#\n+# @tag: The \"Tag\" field as defined in Compute Express Link (CXL)\n+# Specification, Revision 3.1, Table 7-71.\n+#\n+# Features:\n+#\n+# @unstable: For now this command is subject to change.\n+#\n+# Since: 9.1\n+##\n+{ 'command': 'cxl-release-dynamic-capacity-status',\n+ 'data': { 'path': 'str',\n+ 'host-id': 'uint16',\n+ 'region': 'uint8',\n+ 'tag': 'str'\n+ },\n+ 'features': [ 'unstable' ],\n+ 'returns': 'ExtentStatus'\n+}\n", "prefixes": [ "9/9" ] }