{"id":2216055,"url":"http://patchwork.ozlabs.org/api/patches/2216055/?format=json","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=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":"<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=json","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=json","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":"","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; 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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":"","CC":", , ,\n , ,\n , , ,\n , , ,\n , ","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 ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Reply-to":"Alireza Sanaee ","From":"Alireza Sanaee via qemu development ","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 \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"]}