From nobody Sun May 5 17:03:25 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of redhat.com designates 209.132.183.39 as permitted sender) client-ip=209.132.183.39; envelope-from=libvir-list-bounces@redhat.com; helo=mx6-phx2.redhat.com; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of redhat.com designates 209.132.183.39 as permitted sender) smtp.mailfrom=libvir-list-bounces@redhat.com; Return-Path: Received: from mx6-phx2.redhat.com (mx6-phx2.redhat.com [209.132.183.39]) by mx.zohomail.com with SMTPS id 1488201775932462.17187397430973; Mon, 27 Feb 2017 05:22:55 -0800 (PST) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by mx6-phx2.redhat.com (8.14.4/8.14.4) with ESMTP id v1RDJpNH008856; Mon, 27 Feb 2017 08:19:51 -0500 Received: from smtp.corp.redhat.com (int-mx16.intmail.prod.int.phx2.redhat.com [10.5.11.28]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id v1RDJnbP027092 for ; Mon, 27 Feb 2017 08:19:49 -0500 Received: by smtp.corp.redhat.com (Postfix) id 37EBE660C0; Mon, 27 Feb 2017 13:19:49 +0000 (UTC) Received: from lisa.redhat.com (ovpn-116-72.ams2.redhat.com [10.36.116.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 84C7A2D655; Mon, 27 Feb 2017 13:19:48 +0000 (UTC) From: Michal Privoznik To: libvir-list@redhat.com Date: Mon, 27 Feb 2017 14:19:23 +0100 Message-Id: <2602c7ec0320061df33682a93de531aaf8bff5ee.1488201118.git.mprivozn@redhat.com> In-Reply-To: References: In-Reply-To: References: X-Scanned-By: MIMEDefang 2.74 on 10.5.11.28 X-loop: libvir-list@redhat.com Subject: [libvirt] [PATCH v2 01/14] qemuBuildMemoryBackendStr: Reorder args and update comment X-BeenThere: libvir-list@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Development discussions about the libvirt library & tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: libvir-list-bounces@redhat.com Errors-To: libvir-list-bounces@redhat.com X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" Frankly, this function is one big mess. A lot of arguments, complicated behaviour. It's really surprising that arguments were in random order (input and output arguments were mixed together), the documentation was outdated, the description of return values was bogus. Signed-off-by: Michal Privoznik --- src/qemu/qemu_command.c | 64 +++++++++++++++++++++++++++------------------= ---- src/qemu/qemu_command.h | 14 +++++------ src/qemu/qemu_hotplug.c | 7 +++--- 3 files changed, 46 insertions(+), 39 deletions(-) diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 41eecfd18..7c52712d1 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -3077,38 +3077,47 @@ qemuBuildControllerDevCommandLine(virCommandPtr cmd, =20 /** * qemuBuildMemoryBackendStr: + * @backendProps: [out] constructed object + * @backendType: [out] type of the backennd used + * @cfg: qemu driver config object + * @qemuCaps: qemu capabilities object + * @def: domain definition object * @size: size of the memory device in kibibytes * @pagesize: size of the requested memory page in KiB, 0 for default * @guestNode: NUMA node in the guest that the memory object will be attac= hed * to, or -1 if NUMA is not used in the guest - * @hostNodes: map of host nodes to alloc the memory in, NULL for default - * @autoNodeset: fallback nodeset in case of automatic numa placement - * @def: domain definition object - * @qemuCaps: qemu capabilities object - * @cfg: qemu driver config object - * @aliasPrefix: prefix string of the alias (to allow for multiple fronten= ts) - * @id: index of the device (to construct the alias) - * @backendStr: returns the object string + * @userNodeset: user requested map of host nodes to alloc the memory on, = NULL + * for default + * @autoNodeset: fallback nodeset in case of automatic NUMA placement + * @force: forcibly use one of the backends * - * Formats the configuration string for the memory device backend according - * to the configuration. @pagesize and @hostNodes can be used to override = the - * default source configuration, both are optional. + * Creates a configuration object that represents memory backend of given = guest + * NUMA node (domain @def and @guestNode) of size @size. @pagesize can be= used + * to override configured size of hugepages. Use @userNodeset and @autoNo= deset + * to fine tune the placement of the memory on the host NUMA nodes. * - * Returns 0 on success, 1 if only the implicit memory-device-ram with no - * other configuration was used (to detect legacy configurations). Returns - * -1 in case of an error. + * By default, if no memory-backend-* object is necessary to fulfil the gu= est + * configuration value of 1 is returned. This behaviour can be suppressed = by + * setting @force to true in which case 0 would be returned. + * + * Then, if one of the two memory-backend-* should be used, the @qemuCaps = is + * consulted to check if qemu does support it. + * + * Returns: 0 on success, + * 1 on success and if there's no need to use memory-backend-* + * -1 on error. */ int -qemuBuildMemoryBackendStr(unsigned long long size, - unsigned long long pagesize, +qemuBuildMemoryBackendStr(virJSONValuePtr *backendProps, + const char **backendType, + virQEMUDriverConfigPtr cfg, + virQEMUCapsPtr qemuCaps, + virDomainDefPtr def, int guestNode, + unsigned long long size, + unsigned long long pagesize, virBitmapPtr userNodeset, virBitmapPtr autoNodeset, - virDomainDefPtr def, - virQEMUCapsPtr qemuCaps, - virQEMUDriverConfigPtr cfg, - const char **backendType, - virJSONValuePtr *backendProps, bool force) { virDomainHugePagePtr master_hugepage =3D NULL; @@ -3327,9 +3336,9 @@ qemuBuildMemoryCellBackendStr(virDomainDefPtr def, if (virAsprintf(&alias, "ram-node%zu", cell) < 0) goto cleanup; =20 - if ((rc =3D qemuBuildMemoryBackendStr(memsize, 0, cell, NULL, auto_nod= eset, - def, qemuCaps, cfg, &backendType, - &props, false)) < 0) + if ((rc =3D qemuBuildMemoryBackendStr(&props, &backendType, cfg, qemuC= aps, + def, cell, memsize, 0, NULL, + auto_nodeset, false)) < 0) goto cleanup; =20 if (!(*backendStr =3D virQEMUBuildObjectCommandlineFromJSON(backendTyp= e, @@ -3368,10 +3377,9 @@ qemuBuildMemoryDimmBackendStr(virDomainMemoryDefPtr = mem, if (virAsprintf(&alias, "mem%s", mem->info.alias) < 0) goto cleanup; =20 - if (qemuBuildMemoryBackendStr(mem->size, mem->pagesize, - mem->targetNode, mem->sourceNodes, auto_= nodeset, - def, qemuCaps, cfg, - &backendType, &props, true) < 0) + if (qemuBuildMemoryBackendStr(&props, &backendType, cfg, qemuCaps, def, + mem->targetNode, mem->size, mem->pagesiz= e, + mem->sourceNodes, auto_nodeset, true) < = 0) goto cleanup; =20 ret =3D virQEMUBuildObjectCommandlineFromJSON(backendType, alias, prop= s); diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h index 69fe84613..efdad77f3 100644 --- a/src/qemu/qemu_command.h +++ b/src/qemu/qemu_command.h @@ -124,16 +124,16 @@ char *qemuBuildControllerDevStr(const virDomainDef *d= omainDef, virQEMUCapsPtr qemuCaps, int *nusbcontroller); =20 -int qemuBuildMemoryBackendStr(unsigned long long size, - unsigned long long pagesize, +int qemuBuildMemoryBackendStr(virJSONValuePtr *backendProps, + const char **backendType, + virQEMUDriverConfigPtr cfg, + virQEMUCapsPtr qemuCaps, + virDomainDefPtr def, int guestNode, + unsigned long long size, + unsigned long long pagesize, virBitmapPtr userNodeset, virBitmapPtr autoNodeset, - virDomainDefPtr def, - virQEMUCapsPtr qemuCaps, - virQEMUDriverConfigPtr cfg, - const char **backendType, - virJSONValuePtr *backendProps, bool force); =20 char *qemuBuildMemoryDeviceStr(virDomainMemoryDefPtr mem); diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 97fb272f6..c7b8074d6 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -2216,10 +2216,9 @@ qemuDomainAttachMemory(virQEMUDriverPtr driver, if (!(devstr =3D qemuBuildMemoryDeviceStr(mem))) goto cleanup; =20 - if (qemuBuildMemoryBackendStr(mem->size, mem->pagesize, - mem->targetNode, mem->sourceNodes, NULL, - vm->def, priv->qemuCaps, cfg, - &backendType, &props, true) < 0) + if (qemuBuildMemoryBackendStr(&props, &backendType, cfg, priv->qemuCap= s, + vm->def, mem->targetNode, mem->size, + mem->pagesize, mem->sourceNodes, NULL, t= rue) < 0) goto cleanup; =20 if (virDomainMemoryInsert(vm->def, mem) < 0) { --=20 2.11.0 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list From nobody Sun May 5 17:03:25 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of redhat.com designates 209.132.183.24 as permitted sender) client-ip=209.132.183.24; envelope-from=libvir-list-bounces@redhat.com; helo=mx3-phx2.redhat.com; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of redhat.com designates 209.132.183.24 as permitted sender) smtp.mailfrom=libvir-list-bounces@redhat.com; Return-Path: Received: from mx3-phx2.redhat.com (mx3-phx2.redhat.com [209.132.183.24]) by mx.zohomail.com with SMTPS id 1488201828050883.3518777945324; Mon, 27 Feb 2017 05:23:48 -0800 (PST) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by mx3-phx2.redhat.com (8.13.8/8.13.8) with ESMTP id v1RDKV0K005782; Mon, 27 Feb 2017 08:20:31 -0500 Received: from smtp.corp.redhat.com (int-mx16.intmail.prod.int.phx2.redhat.com [10.5.11.28]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id v1RDJoD7027098 for ; Mon, 27 Feb 2017 08:19:50 -0500 Received: by smtp.corp.redhat.com (Postfix) id 644E6660C0; Mon, 27 Feb 2017 13:19:50 +0000 (UTC) Received: from lisa.redhat.com (ovpn-116-72.ams2.redhat.com [10.36.116.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 886962D655; Mon, 27 Feb 2017 13:19:49 +0000 (UTC) From: Michal Privoznik To: libvir-list@redhat.com Date: Mon, 27 Feb 2017 14:19:24 +0100 Message-Id: <7f2f82e15b35328596f407c3025a2a2c5afd6657.1488201118.git.mprivozn@redhat.com> In-Reply-To: References: In-Reply-To: References: X-Scanned-By: MIMEDefang 2.74 on 10.5.11.28 X-loop: libvir-list@redhat.com Subject: [libvirt] [PATCH v2 02/14] Introduce NVDIMM memory model X-BeenThere: libvir-list@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Development discussions about the libvirt library & tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: libvir-list-bounces@redhat.com Errors-To: libvir-list-bounces@redhat.com X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" NVDIMM is new type of memory introduced into QEMU 2.6. The idea is that we have a Non-Volatile memory module that keeps the data persistent across domain reboots. At the domain XML level, we already have some representation of 'dimm' modules. Long story short, we have element that lives under . Now, the element even has @model attribute which we can use to introduce new memory type: /tmp/nvdimm 523264 0
So far, this is just a XML parser/formatter extension. QEMU driver implementation is in the next commit. For more info on NVDIMM visit the following web page: http://pmem.io/ Signed-off-by: Michal Privoznik --- docs/formatdomain.html.in | 55 ++++++++---- docs/schemas/domaincommon.rng | 32 ++++--- src/conf/domain_conf.c | 97 ++++++++++++++++--= ---- src/conf/domain_conf.h | 2 + src/qemu/qemu_command.c | 6 ++ src/qemu/qemu_domain.c | 5 ++ .../qemuxml2argv-memory-hotplug-nvdimm.xml | 56 +++++++++++++ .../qemuxml2xmlout-memory-hotplug-nvdimm.xml | 1 + tests/qemuxml2xmltest.c | 1 + 9 files changed, 204 insertions(+), 51 deletions(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdi= mm.xml create mode 120000 tests/qemuxml2xmloutdata/qemuxml2xmlout-memory-hotplug-= nvdimm.xml diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index 02ce7924c..b76905cdc 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -7007,7 +7007,6 @@ qemu-kvm -net nic,model=3D? /dev/null guests' memory resource needs. =20 Some hypervisors may require NUMA configured for the guest. - Since 1.2.14

=20

@@ -7032,6 +7031,15 @@ qemu-kvm -net nic,model=3D? /dev/null <node>1</node> </target> </memory> + <memory model=3D'nvdimm'> + <source> + <path>/tmp/nvdimm</path> + </source> + <target> + <size unit=3D'KiB'>524288</size> + <node>1</node> + </target> + </memory> </devices> ... @@ -7039,28 +7047,47 @@ qemu-kvm -net nic,model=3D? /dev/null

model

- Currently only the dimm model is supported in order= to - add a virtual DIMM module to the guest. + Provide dimm to add a virtual DIMM module to the gu= est. + Since 1.2.14 + Provide nvdimm model adds a Non-Volatile DIMM + module. Since 3.1.0

=20
source

- The optional source element allows to fine tune the source of the - memory used for the given memory device. If the element is not - provided defaults configured via numatune are used. + For model dimm this element is optional and allows = to + fine tune the source of the memory used for the given memory dev= ice. + If the element is not provided defaults configured via + numatune are used. If dimm is provided, + then the following optional elements can be provided as well:

-

- pagesize can optionally be used to override the def= ault - host page size used for backing the memory device. =20 - The configured value must correspond to a page size supported by= the - host. -

+
+
pagesize
+
+

+ This element can optionally be used to override the default + host page size used for backing the memory device. + The configured value must correspond to a page size supporte= d by the + host. +

+
+ +
nodemask
+
+

+ This element can optionally be used to override the default + set of NUMA nodes where the memory would be allocated. +

+
+
+

- nodemask can optionally be used to override the def= ault - set of NUMA nodes where the memory would be allocated. + For model nvdimm this element is mandatory and has a + single child element path that represents a path + in the host that backs the nvdimm module in the guest.

=20 diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng index c64544ac4..fafd3e982 100644 --- a/docs/schemas/domaincommon.rng +++ b/docs/schemas/domaincommon.rng @@ -4737,6 +4737,7 @@ dimm + nvdimm @@ -4756,18 +4757,27 @@ =20 - - - - + + + + + + + + + + + + + + + + + + - - - - - - - + + =20 diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 97d42fe99..4ffca7dc8 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -858,8 +858,11 @@ VIR_ENUM_DECL(virDomainBlockJob) VIR_ENUM_IMPL(virDomainBlockJob, VIR_DOMAIN_BLOCK_JOB_TYPE_LAST, "", "", "copy", "", "active-commit") =20 -VIR_ENUM_IMPL(virDomainMemoryModel, VIR_DOMAIN_MEMORY_MODEL_LAST, - "", "dimm") +VIR_ENUM_IMPL(virDomainMemoryModel, + VIR_DOMAIN_MEMORY_MODEL_LAST, + "", + "dimm", + "nvdimm") =20 VIR_ENUM_IMPL(virDomainShmemModel, VIR_DOMAIN_SHMEM_MODEL_LAST, "ivshmem", @@ -2418,6 +2421,7 @@ void virDomainMemoryDefFree(virDomainMemoryDefPtr def) if (!def) return; =20 + VIR_FREE(def->path); virBitmapFree(def->sourceNodes); virDomainDeviceInfoClear(&def->info); VIR_FREE(def); @@ -13755,20 +13759,36 @@ virDomainMemorySourceDefParseXML(xmlNodePtr node, xmlNodePtr save =3D ctxt->node; ctxt->node =3D node; =20 - if (virDomainParseMemory("./pagesize", "./pagesize/@unit", ctxt, - &def->pagesize, false, false) < 0) - goto cleanup; - - if ((nodemask =3D virXPathString("string(./nodemask)", ctxt))) { - if (virBitmapParse(nodemask, &def->sourceNodes, - VIR_DOMAIN_CPUMASK_LEN) < 0) + switch ((virDomainMemoryModel) def->model) { + case VIR_DOMAIN_MEMORY_MODEL_DIMM: + if (virDomainParseMemory("./pagesize", "./pagesize/@unit", ctxt, + &def->pagesize, false, false) < 0) goto cleanup; =20 - if (virBitmapIsAllClear(def->sourceNodes)) { - virReportError(VIR_ERR_CONFIG_UNSUPPORTED, - _("Invalid value of 'nodemask': %s"), nodemask); + if ((nodemask =3D virXPathString("string(./nodemask)", ctxt))) { + if (virBitmapParse(nodemask, &def->sourceNodes, + VIR_DOMAIN_CPUMASK_LEN) < 0) + goto cleanup; + + if (virBitmapIsAllClear(def->sourceNodes)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("Invalid value of 'nodemask': %s"), nodem= ask); + goto cleanup; + } + } + break; + + case VIR_DOMAIN_MEMORY_MODEL_NVDIMM: + if (!(def->path =3D virXPathString("string(./path)", ctxt))) { + virReportError(VIR_ERR_XML_DETAIL, "%s", + _("path is required for model nvdimm'")); goto cleanup; } + break; + + case VIR_DOMAIN_MEMORY_MODEL_NONE: + case VIR_DOMAIN_MEMORY_MODEL_LAST: + break; } =20 ret =3D 0; @@ -15173,12 +15193,25 @@ virDomainMemoryFindByDefInternal(virDomainDefPtr = def, tmp->size !=3D mem->size) continue; =20 - /* source stuff -> match with device */ - if (tmp->pagesize !=3D mem->pagesize) - continue; + switch ((virDomainMemoryModel) mem->model) { + case VIR_DOMAIN_MEMORY_MODEL_DIMM: + /* source stuff -> match with device */ + if (tmp->pagesize !=3D mem->pagesize) + continue; =20 - if (!virBitmapEqual(tmp->sourceNodes, mem->sourceNodes)) - continue; + if (!virBitmapEqual(tmp->sourceNodes, mem->sourceNodes)) + continue; + break; + + case VIR_DOMAIN_MEMORY_MODEL_NVDIMM: + if (STRNEQ(tmp->path, mem->path)) + continue; + break; + + case VIR_DOMAIN_MEMORY_MODEL_NONE: + case VIR_DOMAIN_MEMORY_MODEL_LAST: + break; + } =20 break; } @@ -22571,23 +22604,35 @@ virDomainMemorySourceDefFormat(virBufferPtr buf, char *bitmap =3D NULL; int ret =3D -1; =20 - if (!def->pagesize && !def->sourceNodes) + if (!def->pagesize && !def->sourceNodes && !def->path) return 0; =20 virBufferAddLit(buf, "\n"); virBufferAdjustIndent(buf, 2); =20 - if (def->sourceNodes) { - if (!(bitmap =3D virBitmapFormat(def->sourceNodes))) - goto cleanup; + switch ((virDomainMemoryModel) def->model) { + case VIR_DOMAIN_MEMORY_MODEL_DIMM: + if (def->sourceNodes) { + if (!(bitmap =3D virBitmapFormat(def->sourceNodes))) + goto cleanup; =20 - virBufferAsprintf(buf, "%s\n", bitmap); + virBufferAsprintf(buf, "%s\n", bitmap); + } + + if (def->pagesize) + virBufferAsprintf(buf, "%llu= \n", + def->pagesize); + break; + + case VIR_DOMAIN_MEMORY_MODEL_NVDIMM: + virBufferAsprintf(buf, "%s\n", def->path); + break; + + case VIR_DOMAIN_MEMORY_MODEL_NONE: + case VIR_DOMAIN_MEMORY_MODEL_LAST: + break; } =20 - if (def->pagesize) - virBufferAsprintf(buf, "%llu\n", - def->pagesize); - virBufferAdjustIndent(buf, -2); virBufferAddLit(buf, "\n"); =20 diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index 1e53cc328..dc949d3c9 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -1996,6 +1996,7 @@ struct _virDomainRNGDef { typedef enum { VIR_DOMAIN_MEMORY_MODEL_NONE, VIR_DOMAIN_MEMORY_MODEL_DIMM, /* dimm hotpluggable memory device */ + VIR_DOMAIN_MEMORY_MODEL_NVDIMM, /* nvdimm memory device */ =20 VIR_DOMAIN_MEMORY_MODEL_LAST } virDomainMemoryModel; @@ -2004,6 +2005,7 @@ struct _virDomainMemoryDef { /* source */ virBitmapPtr sourceNodes; unsigned long long pagesize; /* kibibytes */ + char *path; =20 /* target */ int model; /* virDomainMemoryModel */ diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 7c52712d1..f628a9929 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -3421,6 +3421,12 @@ qemuBuildMemoryDeviceStr(virDomainMemoryDefPtr mem) =20 break; =20 + case VIR_DOMAIN_MEMORY_MODEL_NVDIMM: + virReportError(VIR_ERR_NO_SUPPORT, "%s", + _("nvdimm not supported yet")); + return NULL; + break; + case VIR_DOMAIN_MEMORY_MODEL_NONE: case VIR_DOMAIN_MEMORY_MODEL_LAST: break; diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index c187214dc..5ec610564 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -5910,6 +5910,11 @@ qemuDomainDefValidateMemoryHotplugDevice(const virDo= mainMemoryDef *mem, } break; =20 + case VIR_DOMAIN_MEMORY_MODEL_NVDIMM: + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("nvdimm hotplug not supported yet")); + return -1; + case VIR_DOMAIN_MEMORY_MODEL_NONE: case VIR_DOMAIN_MEMORY_MODEL_LAST: return -1; diff --git a/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm.xml = b/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm.xml new file mode 100644 index 000000000..1578db453 --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm.xml @@ -0,0 +1,56 @@ + + QEMUGuest1 + c7a5fdbd-edaf-9455-926a-d65c16db1809 + 1099511627776 + 1267710 + 1267710 + 2 + + hvm + + + + + + + + + + + + + + destroy + restart + destroy + + /usr/bin/qemu + + + +
+ + +
+ + +
+ + + + + +
+ + + + /tmp/nvdimm + + + 523264 + 0 + +
+ + + diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-memory-hotplug-nvdimm.= xml b/tests/qemuxml2xmloutdata/qemuxml2xmlout-memory-hotplug-nvdimm.xml new file mode 120000 index 000000000..4cac477a9 --- /dev/null +++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-memory-hotplug-nvdimm.xml @@ -0,0 +1 @@ +../qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm.xml \ No newline at end of file diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c index 4353ad245..e1c341dd5 100644 --- a/tests/qemuxml2xmltest.c +++ b/tests/qemuxml2xmltest.c @@ -1078,6 +1078,7 @@ mymain(void) DO_TEST("memory-hotplug", NONE); DO_TEST("memory-hotplug-nonuma", NONE); DO_TEST("memory-hotplug-dimm", NONE); + DO_TEST("memory-hotplug-nvdimm", NONE); DO_TEST("net-udp", NONE); =20 DO_TEST("video-virtio-gpu-device", NONE); --=20 2.11.0 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list From nobody Sun May 5 17:03:25 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of redhat.com designates 209.132.183.37 as permitted sender) client-ip=209.132.183.37; envelope-from=libvir-list-bounces@redhat.com; helo=mx5-phx2.redhat.com; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of redhat.com designates 209.132.183.37 as permitted sender) smtp.mailfrom=libvir-list-bounces@redhat.com; Return-Path: Received: from mx5-phx2.redhat.com (mx5-phx2.redhat.com [209.132.183.37]) by mx.zohomail.com with SMTPS id 1488201782162682.0438200275306; Mon, 27 Feb 2017 05:23:02 -0800 (PST) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by mx5-phx2.redhat.com (8.14.4/8.14.4) with ESMTP id v1RDJrpJ064746; Mon, 27 Feb 2017 08:19:53 -0500 Received: from smtp.corp.redhat.com (int-mx16.intmail.prod.int.phx2.redhat.com [10.5.11.28]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id v1RDJpf5027106 for ; Mon, 27 Feb 2017 08:19:51 -0500 Received: by smtp.corp.redhat.com (Postfix) id 68DA3660C1; Mon, 27 Feb 2017 13:19:51 +0000 (UTC) Received: from lisa.redhat.com (ovpn-116-72.ams2.redhat.com [10.36.116.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id B430D2D655; Mon, 27 Feb 2017 13:19:50 +0000 (UTC) From: Michal Privoznik To: libvir-list@redhat.com Date: Mon, 27 Feb 2017 14:19:25 +0100 Message-Id: <5a557452ab0d1d4266e3a5b08860b77e226e810b.1488201118.git.mprivozn@redhat.com> In-Reply-To: References: In-Reply-To: References: X-Scanned-By: MIMEDefang 2.74 on 10.5.11.28 X-loop: libvir-list@redhat.com Subject: [libvirt] [PATCH v2 03/14] qemu: Introduce QEMU_CAPS_DEVICE_NVDIMM X-BeenThere: libvir-list@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Development discussions about the libvirt library & tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: libvir-list-bounces@redhat.com Errors-To: libvir-list-bounces@redhat.com X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" Introduce a qemu capability for -device nvdimm. Signed-off-by: Michal Privoznik --- src/qemu/qemu_capabilities.c | 9 +++++++++ src/qemu/qemu_capabilities.h | 1 + 2 files changed, 10 insertions(+) diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 6f60a00ef..a9a2705a6 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -358,6 +358,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST, "query-cpu-model-expansion", /* 245 */ "virtio-net.host_mtu", "spice-rendernode", + "nvdimm", ); =20 =20 @@ -1625,6 +1626,7 @@ struct virQEMUCapsStringFlags virQEMUCapsObjectTypes[= ] =3D { { "ivshmem-plain", QEMU_CAPS_DEVICE_IVSHMEM_PLAIN }, { "ivshmem-doorbell", QEMU_CAPS_DEVICE_IVSHMEM_DOORBELL }, { "vhost-scsi", QEMU_CAPS_DEVICE_VHOST_SCSI }, + { "nvdimm", QEMU_CAPS_DEVICE_NVDIMM }, }; =20 static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsVirtioBalloon[]= =3D { @@ -4358,6 +4360,13 @@ virQEMUCapsInitQMPMonitor(virQEMUCapsPtr qemuCaps, virQEMUCapsProbeQMPGICCapabilities(qemuCaps, mon) < 0) goto cleanup; =20 + /* Prealloc on NVDIMMs is broken on older QEMUs leading to + * user data corruption. If we are dealing with such version + * of QEMU pretend we don't know how to NVDIMM. */ + if (qemuCaps->version < 2009000 && + virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_NVDIMM)) + virQEMUCapsClear(qemuCaps, QEMU_CAPS_DEVICE_NVDIMM); + ret =3D 0; cleanup: return ret; diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h index 0f998c473..01c4a80e6 100644 --- a/src/qemu/qemu_capabilities.h +++ b/src/qemu/qemu_capabilities.h @@ -394,6 +394,7 @@ typedef enum { QEMU_CAPS_QUERY_CPU_MODEL_EXPANSION, /* qmp query-cpu-model-expansion = */ QEMU_CAPS_VIRTIO_NET_HOST_MTU, /* virtio-net-*.host_mtu */ QEMU_CAPS_SPICE_RENDERNODE, /* -spice rendernode */ + QEMU_CAPS_DEVICE_NVDIMM, /* -device nvdimm */ =20 QEMU_CAPS_LAST /* this must always be the last item */ } virQEMUCapsFlags; --=20 2.11.0 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list From nobody Sun May 5 17:03:25 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of redhat.com designates 209.132.183.37 as permitted sender) client-ip=209.132.183.37; envelope-from=libvir-list-bounces@redhat.com; helo=mx5-phx2.redhat.com; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of redhat.com designates 209.132.183.37 as permitted sender) smtp.mailfrom=libvir-list-bounces@redhat.com; Return-Path: Received: from mx5-phx2.redhat.com (mx5-phx2.redhat.com [209.132.183.37]) by mx.zohomail.com with SMTPS id 1488201870234928.8480301890363; Mon, 27 Feb 2017 05:24:30 -0800 (PST) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by mx5-phx2.redhat.com (8.14.4/8.14.4) with ESMTP id v1RDLKeW065269; Mon, 27 Feb 2017 08:21:20 -0500 Received: from smtp.corp.redhat.com (int-mx16.intmail.prod.int.phx2.redhat.com [10.5.11.28]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id v1RDJqRo027113 for ; Mon, 27 Feb 2017 08:19:52 -0500 Received: by smtp.corp.redhat.com (Postfix) id 6DD352D655; Mon, 27 Feb 2017 13:19:52 +0000 (UTC) Received: from lisa.redhat.com (ovpn-116-72.ams2.redhat.com [10.36.116.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id B8484660C0; Mon, 27 Feb 2017 13:19:51 +0000 (UTC) From: Michal Privoznik To: libvir-list@redhat.com Date: Mon, 27 Feb 2017 14:19:26 +0100 Message-Id: <19d7b05d5f4820b42e2a587b4a68d1012415b7cd.1488201118.git.mprivozn@redhat.com> In-Reply-To: References: In-Reply-To: References: X-Scanned-By: MIMEDefang 2.74 on 10.5.11.28 X-loop: libvir-list@redhat.com Subject: [libvirt] [PATCH v2 04/14] qemu: Implement NVDIMM X-BeenThere: libvir-list@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Development discussions about the libvirt library & tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: libvir-list-bounces@redhat.com Errors-To: libvir-list-bounces@redhat.com X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" So, majority of the code is just ready as-is. Well, with one slight change: differentiate between dimm and nvdimm in places like device alias generation, generating the command line and so on. Speaking of the command line, we also need to append 'nvdimm=3Don' to the '-machine' argument so that the nvdimm feature is advertised in the ACPI tables properly. Signed-off-by: Michal Privoznik --- src/qemu/qemu_alias.c | 10 ++- src/qemu/qemu_command.c | 91 +++++++++++++++---= ---- src/qemu/qemu_command.h | 1 + src/qemu/qemu_domain.c | 34 +++++--- src/qemu/qemu_hotplug.c | 3 +- .../qemuxml2argv-memory-hotplug-nvdimm.args | 26 +++++++ tests/qemuxml2argvtest.c | 4 +- 7 files changed, 128 insertions(+), 41 deletions(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdi= mm.args diff --git a/src/qemu/qemu_alias.c b/src/qemu/qemu_alias.c index 4cccf231e..05e1293ef 100644 --- a/src/qemu/qemu_alias.c +++ b/src/qemu/qemu_alias.c @@ -352,17 +352,23 @@ qemuAssignDeviceMemoryAlias(virDomainDefPtr def, size_t i; int maxidx =3D 0; int idx; + const char *prefix; + + if (mem->model =3D=3D VIR_DOMAIN_MEMORY_MODEL_DIMM) + prefix =3D "dimm"; + else + prefix =3D "nvdimm"; =20 if (oldAlias) { for (i =3D 0; i < def->nmems; i++) { - if ((idx =3D qemuDomainDeviceAliasIndex(&def->mems[i]->info, "= dimm")) >=3D maxidx) + if ((idx =3D qemuDomainDeviceAliasIndex(&def->mems[i]->info, p= refix)) >=3D maxidx) maxidx =3D idx + 1; } } else { maxidx =3D mem->info.addr.dimm.slot; } =20 - if (virAsprintf(&mem->info.alias, "dimm%d", maxidx) < 0) + if (virAsprintf(&mem->info.alias, "%s%d", prefix, maxidx) < 0) return -1; =20 return 0; diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index f628a9929..46a6ca9f0 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -3089,6 +3089,7 @@ qemuBuildControllerDevCommandLine(virCommandPtr cmd, * @userNodeset: user requested map of host nodes to alloc the memory on, = NULL * for default * @autoNodeset: fallback nodeset in case of automatic NUMA placement + * @memPathReq: request memory-backend-file with specific mem-path * @force: forcibly use one of the backends * * Creates a configuration object that represents memory backend of given = guest @@ -3103,6 +3104,8 @@ qemuBuildControllerDevCommandLine(virCommandPtr cmd, * Then, if one of the two memory-backend-* should be used, the @qemuCaps = is * consulted to check if qemu does support it. * + * If @memPathReq is non-NULL, memory-backend-file is used with passed pat= h. + * * Returns: 0 on success, * 1 on success and if there's no need to use memory-backend-* * -1 on error. @@ -3118,6 +3121,7 @@ qemuBuildMemoryBackendStr(virJSONValuePtr *backendPro= ps, unsigned long long pagesize, virBitmapPtr userNodeset, virBitmapPtr autoNodeset, + const char *memPathReq, bool force) { virDomainHugePagePtr master_hugepage =3D NULL; @@ -3126,7 +3130,8 @@ qemuBuildMemoryBackendStr(virJSONValuePtr *backendPro= ps, const long system_page_size =3D virGetSystemPageSizeKB(); virDomainMemoryAccess memAccess =3D VIR_DOMAIN_MEMORY_ACCESS_DEFAULT; size_t i; - char *mem_path =3D NULL; + char *memPathActual =3D NULL; + bool prealloc =3D false; virBitmapPtr nodemask =3D NULL; int ret =3D -1; virJSONValuePtr props =3D NULL; @@ -3206,27 +3211,36 @@ qemuBuildMemoryBackendStr(virJSONValuePtr *backendP= rops, if (!(props =3D virJSONValueNewObject())) return -1; =20 - if (pagesize || def->mem.source =3D=3D VIR_DOMAIN_MEMORY_SOURCE_FILE) { + if (pagesize || memPathReq || + def->mem.source =3D=3D VIR_DOMAIN_MEMORY_SOURCE_FILE) { *backendType =3D "memory-backend-file"; =20 - if (def->mem.source =3D=3D VIR_DOMAIN_MEMORY_SOURCE_FILE) { + if (memPathReq) { + if (VIR_STRDUP(memPathActual, memPathReq) < 0) + goto cleanup; + prealloc =3D true; + } else if (def->mem.source =3D=3D VIR_DOMAIN_MEMORY_SOURCE_FILE) { /* we can have both pagesize and mem source, then check mem so= urce first */ + if (VIR_STRDUP(memPathActual, cfg->memoryBackingDir) < 0) + goto cleanup; force =3D true; - if (virJSONValueObjectAdd(props, - "s:mem-path", cfg->memoryBackingDir, - NULL) < 0) - goto cleanup; } else { - if (qemuGetDomainHupageMemPath(def, cfg, pagesize, &mem_path) = < 0) - goto cleanup; - - if (virJSONValueObjectAdd(props, - "b:prealloc", true, - "s:mem-path", mem_path, - NULL) < 0) + if (qemuGetDomainHupageMemPath(def, cfg, pagesize, &memPathAct= ual) < 0) goto cleanup; + prealloc =3D true; } =20 + if (prealloc && + virJSONValueObjectAdd(props, + "b:prealloc", true, + NULL) < 0) + goto cleanup; + + if (virJSONValueObjectAdd(props, + "s:mem-path", memPathActual, + NULL) < 0) + goto cleanup; + switch (memAccess) { case VIR_DOMAIN_MEMORY_ACCESS_SHARED: if (virJSONValueObjectAdd(props, "b:share", true, NULL) < 0) @@ -3281,7 +3295,8 @@ qemuBuildMemoryBackendStr(virJSONValuePtr *backendPro= ps, } =20 /* If none of the following is requested... */ - if (!needHugepage && !userNodeset && !memAccess && !nodeSpecified && != force) { + if (!needHugepage && !userNodeset && + !memAccess && !nodeSpecified && !force && !memPathReq) { /* report back that using the new backend is not necessary * to achieve the desired configuration */ ret =3D 1; @@ -3309,8 +3324,7 @@ qemuBuildMemoryBackendStr(virJSONValuePtr *backendPro= ps, =20 cleanup: virJSONValueFree(props); - VIR_FREE(mem_path); - + VIR_FREE(memPathActual); return ret; } =20 @@ -3338,7 +3352,7 @@ qemuBuildMemoryCellBackendStr(virDomainDefPtr def, =20 if ((rc =3D qemuBuildMemoryBackendStr(&props, &backendType, cfg, qemuC= aps, def, cell, memsize, 0, NULL, - auto_nodeset, false)) < 0) + auto_nodeset, NULL, false)) < 0) goto cleanup; =20 if (!(*backendStr =3D virQEMUBuildObjectCommandlineFromJSON(backendTyp= e, @@ -3379,7 +3393,8 @@ qemuBuildMemoryDimmBackendStr(virDomainMemoryDefPtr m= em, =20 if (qemuBuildMemoryBackendStr(&props, &backendType, cfg, qemuCaps, def, mem->targetNode, mem->size, mem->pagesiz= e, - mem->sourceNodes, auto_nodeset, true) < = 0) + mem->sourceNodes, auto_nodeset, mem->pat= h, + true) < 0) goto cleanup; =20 ret =3D virQEMUBuildObjectCommandlineFromJSON(backendType, alias, prop= s); @@ -3396,6 +3411,7 @@ char * qemuBuildMemoryDeviceStr(virDomainMemoryDefPtr mem) { virBuffer buf =3D VIR_BUFFER_INITIALIZER; + const char *device; =20 if (!mem->info.alias) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", @@ -3404,8 +3420,15 @@ qemuBuildMemoryDeviceStr(virDomainMemoryDefPtr mem) } =20 switch ((virDomainMemoryModel) mem->model) { + case VIR_DOMAIN_MEMORY_MODEL_NVDIMM: case VIR_DOMAIN_MEMORY_MODEL_DIMM: - virBufferAddLit(&buf, "pc-dimm,"); + + if (mem->model =3D=3D VIR_DOMAIN_MEMORY_MODEL_DIMM) + device =3D "pc-dimm"; + else + device =3D "nvdimm"; + + virBufferAsprintf(&buf, "%s,", device); =20 if (mem->targetNode >=3D 0) virBufferAsprintf(&buf, "node=3D%d,", mem->targetNode); @@ -3421,12 +3444,6 @@ qemuBuildMemoryDeviceStr(virDomainMemoryDefPtr mem) =20 break; =20 - case VIR_DOMAIN_MEMORY_MODEL_NVDIMM: - virReportError(VIR_ERR_NO_SUPPORT, "%s", - _("nvdimm not supported yet")); - return NULL; - break; - case VIR_DOMAIN_MEMORY_MODEL_NONE: case VIR_DOMAIN_MEMORY_MODEL_LAST: break; @@ -6976,6 +6993,7 @@ qemuBuildMachineCommandLine(virCommandPtr cmd, { virBuffer buf =3D VIR_BUFFER_INITIALIZER; bool obsoleteAccel =3D false; + size_t i; int ret =3D -1; =20 /* This should *never* be NULL, since we always provide @@ -7012,6 +7030,15 @@ qemuBuildMachineCommandLine(virCommandPtr cmd, "with this QEMU binary")); return -1; } + + for (i =3D 0; i < def->nmems; i++) { + if (def->mems[i]->model =3D=3D VIR_DOMAIN_MEMORY_MODEL_NVDIMM)= { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("nvdimm not is not available " + "with this QEMU binary")); + return -1; + } + } } else { virTristateSwitch vmport =3D def->features[VIR_DOMAIN_FEATURE_VMPO= RT]; virTristateSwitch smm =3D def->features[VIR_DOMAIN_FEATURE_SMM]; @@ -7132,6 +7159,18 @@ qemuBuildMachineCommandLine(virCommandPtr cmd, } } =20 + for (i =3D 0; i < def->nmems; i++) { + if (def->mems[i]->model =3D=3D VIR_DOMAIN_MEMORY_MODEL_NVDIMM)= { + if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_NVDIMM)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("nvdimm isn't supported by this QEMU = binary")); + goto cleanup; + } + virBufferAddLit(&buf, ",nvdimm=3Don"); + break; + } + } + virCommandAddArgBuffer(cmd, &buf); } =20 diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h index efdad77f3..e23930255 100644 --- a/src/qemu/qemu_command.h +++ b/src/qemu/qemu_command.h @@ -134,6 +134,7 @@ int qemuBuildMemoryBackendStr(virJSONValuePtr *backendP= rops, unsigned long long pagesize, virBitmapPtr userNodeset, virBitmapPtr autoNodeset, + const char *memPath, bool force); =20 char *qemuBuildMemoryDeviceStr(virDomainMemoryDefPtr mem); diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index 5ec610564..f585e6f25 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -5878,6 +5878,7 @@ qemuDomainDefValidateMemoryHotplugDevice(const virDom= ainMemoryDef *mem, { switch ((virDomainMemoryModel) mem->model) { case VIR_DOMAIN_MEMORY_MODEL_DIMM: + case VIR_DOMAIN_MEMORY_MODEL_NVDIMM: if (mem->info.type !=3D VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DIMM && mem->info.type !=3D VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", @@ -5910,11 +5911,6 @@ qemuDomainDefValidateMemoryHotplugDevice(const virDo= mainMemoryDef *mem, } break; =20 - case VIR_DOMAIN_MEMORY_MODEL_NVDIMM: - virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", - _("nvdimm hotplug not supported yet")); - return -1; - case VIR_DOMAIN_MEMORY_MODEL_NONE: case VIR_DOMAIN_MEMORY_MODEL_LAST: return -1; @@ -5968,12 +5964,6 @@ qemuDomainDefValidateMemoryHotplug(const virDomainDe= f *def, return 0; } =20 - if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_PC_DIMM)) { - virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", - _("memory hotplug isn't supported by this QEMU bina= ry")); - return -1; - } - if (!ARCH_IS_PPC64(def->os.arch)) { /* due to guest support, qemu would silently enable NUMA with one = node * once the memory hotplug backend is enabled. To avoid possible @@ -5997,6 +5987,28 @@ qemuDomainDefValidateMemoryHotplug(const virDomainDe= f *def, for (i =3D 0; i < def->nmems; i++) { hotplugMemory +=3D def->mems[i]->size; =20 + switch ((virDomainMemoryModel) def->mems[i]->model) { + case VIR_DOMAIN_MEMORY_MODEL_DIMM: + if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_PC_DIMM)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("memory hotplug isn't supported by this Q= EMU binary")); + return -1; + } + break; + + case VIR_DOMAIN_MEMORY_MODEL_NVDIMM: + if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_NVDIMM)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("nvdimm isn't supported by this QEMU bina= ry")); + return -1; + } + break; + + case VIR_DOMAIN_MEMORY_MODEL_NONE: + case VIR_DOMAIN_MEMORY_MODEL_LAST: + break; + } + /* already existing devices don't need to be checked on hotplug */ if (!mem && qemuDomainDefValidateMemoryHotplugDevice(def->mems[i], def) < = 0) diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index c7b8074d6..51b87804d 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -2218,7 +2218,8 @@ qemuDomainAttachMemory(virQEMUDriverPtr driver, =20 if (qemuBuildMemoryBackendStr(&props, &backendType, cfg, priv->qemuCap= s, vm->def, mem->targetNode, mem->size, - mem->pagesize, mem->sourceNodes, NULL, t= rue) < 0) + mem->pagesize, mem->sourceNodes, NULL, + mem->path, true) < 0) goto cleanup; =20 if (virDomainMemoryInsert(vm->def, mem) < 0) { diff --git a/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm.args= b/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm.args new file mode 100644 index 000000000..907bcbeda --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm.args @@ -0,0 +1,26 @@ +LC_ALL=3DC \ +PATH=3D/bin \ +HOME=3D/home/test \ +USER=3Dtest \ +LOGNAME=3Dtest \ +QEMU_AUDIO_DRV=3Dnone \ +/usr/bin/qemu \ +-name QEMUGuest1 \ +-S \ +-machine pc,accel=3Dtcg,nvdimm=3Don \ +-m size=3D1048576k,slots=3D16,maxmem=3D1099511627776k \ +-smp 2,sockets=3D2,cores=3D1,threads=3D1 \ +-numa node,nodeid=3D0,cpus=3D0-1,mem=3D1024 \ +-object memory-backend-file,id=3Dmemnvdimm0,prealloc=3Dyes,mem-path=3D/tmp= /nvdimm,\ +size=3D536870912 \ +-device nvdimm,node=3D0,memdev=3Dmemnvdimm0,id=3Dnvdimm0,slot=3D0 \ +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \ +-nographic \ +-nodefaults \ +-monitor unix:/tmp/lib/domain--1-QEMUGuest1/monitor.sock,server,nowait \ +-no-acpi \ +-boot c \ +-usb \ +-drive file=3D/dev/HostVG/QEMUGuest1,format=3Draw,if=3Dnone,id=3Ddrive-ide= 0-0-0 \ +-device ide-drive,bus=3Dide.0,unit=3D0,drive=3Ddrive-ide0-0-0,id=3Dide0-0-= 0 \ +-device virtio-balloon-pci,id=3Dballoon0,bus=3Dpci.0,addr=3D0x3 diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index ad9ce8e2d..05a51a389 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -2325,7 +2325,7 @@ mymain(void) =20 DO_TEST_FAILURE("memory-align-fail", NONE); DO_TEST_FAILURE("memory-hotplug-nonuma", QEMU_CAPS_DEVICE_PC_DIMM); - DO_TEST_FAILURE("memory-hotplug", NONE); + DO_TEST("memory-hotplug", NONE); DO_TEST("memory-hotplug", QEMU_CAPS_DEVICE_PC_DIMM, QEMU_CAPS_NUMA); DO_TEST("memory-hotplug-dimm", QEMU_CAPS_DEVICE_PC_DIMM, QEMU_CAPS_NUM= A, QEMU_CAPS_OBJECT_MEMORY_RAM, QEMU_CAPS_OBJECT_MEMORY_FILE); @@ -2333,6 +2333,8 @@ mymain(void) QEMU_CAPS_OBJECT_MEMORY_RAM, QEMU_CAPS_OBJECT_MEMORY_FILE); DO_TEST("memory-hotplug-ppc64-nonuma", QEMU_CAPS_KVM, QEMU_CAPS_DEVICE= _PC_DIMM, QEMU_CAPS_NUMA, QEMU_CAPS_OBJECT_MEMORY_RAM, QEMU_CAPS_OBJECT_MEMORY_FILE); + DO_TEST("memory-hotplug-nvdimm", QEMU_CAPS_MACHINE_OPT, QEMU_CAPS_DEVI= CE_NVDIMM, + QEMU_CAPS_NUMA, QEMU_CAPS_OBJECT_MEMORY_RAM, QEMU_CAPS_OBJECT_= MEMORY_FILE); =20 DO_TEST("machine-aeskeywrap-on-caps", QEMU_CAPS_MACHINE_OPT, QEMU_CAPS_AES_KEY_WRAP, --=20 2.11.0 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list From nobody Sun May 5 17:03:25 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of redhat.com designates 209.132.183.25 as permitted sender) client-ip=209.132.183.25; envelope-from=libvir-list-bounces@redhat.com; helo=mx4-phx2.redhat.com; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of redhat.com designates 209.132.183.25 as permitted sender) smtp.mailfrom=libvir-list-bounces@redhat.com; Return-Path: Received: from mx4-phx2.redhat.com (mx4-phx2.redhat.com [209.132.183.25]) by mx.zohomail.com with SMTPS id 148820182172058.58424798294061; Mon, 27 Feb 2017 05:23:41 -0800 (PST) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by mx4-phx2.redhat.com (8.13.8/8.13.8) with ESMTP id v1RDKV1p011808; Mon, 27 Feb 2017 08:20:31 -0500 Received: from smtp.corp.redhat.com (int-mx16.intmail.prod.int.phx2.redhat.com [10.5.11.28]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id v1RDJrkE027121 for ; Mon, 27 Feb 2017 08:19:53 -0500 Received: by smtp.corp.redhat.com (Postfix) id 70855660C0; Mon, 27 Feb 2017 13:19:53 +0000 (UTC) Received: from lisa.redhat.com (ovpn-116-72.ams2.redhat.com [10.36.116.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id BD6C52D655; Mon, 27 Feb 2017 13:19:52 +0000 (UTC) From: Michal Privoznik To: libvir-list@redhat.com Date: Mon, 27 Feb 2017 14:19:27 +0100 Message-Id: <631e61f33e1213f480a30e56a0ea49932f5864e1.1488201118.git.mprivozn@redhat.com> In-Reply-To: References: In-Reply-To: References: X-Scanned-By: MIMEDefang 2.74 on 10.5.11.28 X-loop: libvir-list@redhat.com Subject: [libvirt] [PATCH v2 05/14] conf: Introduce @access to X-BeenThere: libvir-list@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Development discussions about the libvirt library & tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: libvir-list-bounces@redhat.com Errors-To: libvir-list-bounces@redhat.com X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" Now that NVDIMM has found its way into libvirt, users might want to fine tune some settings for each module separately. One such setting is 'share=3Don|off' for the memory-backend-file object. This setting - just like its name suggest already - enables sharing the nvdimm module with other applications. Under the hood it controls whether qemu mmaps() the file as MAP_PRIVATE or MAP_SHARED. Yet again, we have such config knob in domain XML, but it's just an attribute to numa . This does not give fine enough tuning on per-memdevice basis so we need to have the attribute for each device too. Signed-off-by: Michal Privoznik --- docs/formatdomain.html.in | 15 +++++- docs/schemas/domaincommon.rng | 8 ++++ src/conf/domain_conf.c | 15 +++++- src/conf/domain_conf.h | 2 + .../qemuxml2argv-memory-hotplug-nvdimm-access.xml | 56 ++++++++++++++++++= ++++ ...qemuxml2xmlout-memory-hotplug-nvdimm-access.xml | 1 + tests/qemuxml2xmltest.c | 1 + 7 files changed, 95 insertions(+), 3 deletions(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdi= mm-access.xml create mode 120000 tests/qemuxml2xmloutdata/qemuxml2xmlout-memory-hotplug-= nvdimm-access.xml diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index b76905cdc..00c0df2ce 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -1406,7 +1406,7 @@ Since 1.2.9 the optional attribute memAccess can control whether the memory is to be mapped as "shared" or "private". This is valid only for - hugepages-backed memory. + hugepages-backed memory and nvdimm modules.

=20

@@ -7015,7 +7015,7 @@ qemu-kvm -net nic,model=3D? /dev/null 

 ...
 <devices>
-  <memory model=3D'dimm'>
+  <memory model=3D'dimm' access=3D'private'>
     <target>
       <size unit=3D'KiB'>524287</size>
       <node>0</node>
@@ -7054,6 +7054,17 @@ qemu-kvm -net nic,model=3D? /dev/null
         

       
=20
+      
access

+      

+        

+          Then there is optional attribute access
+          (Since 3.1.0) that allows
+          uses to fine tune mapping of the memory on per module
+          basis. Values are the same as for numa <cell/>:
+          shared and private.
+        

+      

+
       
source

       

         

diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index fafd3e982..78195aae9 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -4740,6 +4740,14 @@
           nvdimm
         
       
+      
+        
+          
+            shared
+            private
+          
+        
+      
       
         
           
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 4ffca7dc8..a31114cc7 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -13860,6 +13860,15 @@ virDomainMemoryDefParseXML(xmlNodePtr memdevNode,
     }
     VIR_FREE(tmp);
=20
+    tmp =3D virXMLPropString(memdevNode, "access");
+    if (tmp &&
+        (def->access =3D virDomainMemoryAccessTypeFromString(tmp)) <=3D 0)=
 {
+        virReportError(VIR_ERR_XML_ERROR,
+                       _("invalid access mode '%s'"), tmp);
+        goto error;
+    }
+    VIR_FREE(tmp);
+
     /* source */
     if ((node =3D virXPathNode("./source", ctxt)) &&
         virDomainMemorySourceDefParseXML(node, ctxt, def) < 0)
@@ -22666,7 +22675,11 @@ virDomainMemoryDefFormat(virBufferPtr buf,
 {
     const char *model =3D virDomainMemoryModelTypeToString(def->model);
=20
-    virBufferAsprintf(buf, "\n", model);
+    virBufferAsprintf(buf, "access)
+        virBufferAsprintf(buf, " access=3D'%s'",
+                          virDomainMemoryAccessTypeToString(def->access));
+    virBufferAddLit(buf, ">\n");
     virBufferAdjustIndent(buf, 2);
=20
     if (virDomainMemorySourceDefFormat(buf, def) < 0)
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index dc949d3c9..87516ca69 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -2002,6 +2002,8 @@ typedef enum {
 } virDomainMemoryModel;
=20
 struct _virDomainMemoryDef {
+    virDomainMemoryAccess access;
+
     /* source */
     virBitmapPtr sourceNodes;
     unsigned long long pagesize; /* kibibytes */
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-acce=
ss.xml b/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-access.x=
ml
new file mode 100644
index 000000000..700e961a6
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-access.xml
@@ -0,0 +1,56 @@
+
+  QEMUGuest1
+  c7a5fdbd-edaf-9455-926a-d65c16db1809
+  1099511627776
+  1267710
+  1267710
+  2
+  
+    hvm
+    
+  
+  
+    
+    
+  
+  
+    
+    
+      
+    
+  
+  
+  destroy
+  restart
+  destroy
+  
+    /usr/bin/qemu
+    
+      
+      
+      

+    
+    
+      

+    
+    
+      

+    
+    
+    
+    
+    
+      

+    
+    
+      
+        /tmp/nvdimm
+      
+      
+        523264
+        0
+      
+      

+    
+  
+
diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-memory-hotplug-nvdimm-=
access.xml b/tests/qemuxml2xmloutdata/qemuxml2xmlout-memory-hotplug-nvdimm-=
access.xml
new file mode 120000
index 000000000..4b0496ad5
--- /dev/null
+++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-memory-hotplug-nvdimm-access.=
xml
@@ -0,0 +1 @@
+/home/zippy/work/libvirt/libvirt.git/tests/qemuxml2argvdata/qemuxml2argv-m=
emory-hotplug-nvdimm-access.xml
\ No newline at end of file
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index e1c341dd5..ef49a79ca 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -1079,6 +1079,7 @@ mymain(void)
     DO_TEST("memory-hotplug-nonuma", NONE);
     DO_TEST("memory-hotplug-dimm", NONE);
     DO_TEST("memory-hotplug-nvdimm", NONE);
+    DO_TEST("memory-hotplug-nvdimm-access", NONE);
     DO_TEST("net-udp", NONE);
=20
     DO_TEST("video-virtio-gpu-device", NONE);
--=20
2.11.0

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From: Michal Privoznik 
To: libvir-list@redhat.com
Date: Mon, 27 Feb 2017 14:19:28 +0100
Message-Id: 
 <9fcfbb52936617ed74975ae70cd038c621ca681b.1488201118.git.mprivozn@redhat.com>
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References: 
In-Reply-To: 
References: 
X-Scanned-By: MIMEDefang 2.74 on 10.5.11.28
X-loop: libvir-list@redhat.com
Subject: [libvirt] [PATCH v2 06/14] qemu: Implement @access for 
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Signed-off-by: Michal Privoznik 
---
 src/qemu/qemu_command.c                            | 11 +++++++--
 src/qemu/qemu_command.h                            |  1 +
 src/qemu/qemu_hotplug.c                            |  2 +-
 .../qemuxml2argv-memory-hotplug-nvdimm-access.args | 26 ++++++++++++++++++=
++++
 tests/qemuxml2argvtest.c                           |  2 ++
 5 files changed, 39 insertions(+), 3 deletions(-)
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdi=
mm-access.args

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 46a6ca9f0..287387055 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -3090,6 +3090,7 @@ qemuBuildControllerDevCommandLine(virCommandPtr cmd,
  *               for default
  * @autoNodeset: fallback nodeset in case of automatic NUMA placement
  * @memPathReq: request memory-backend-file with specific mem-path
+ * @memAccessReq: specifically requested memAccess mode
  * @force: forcibly use one of the backends
  *
  * Creates a configuration object that represents memory backend of given =
guest
@@ -3122,6 +3123,7 @@ qemuBuildMemoryBackendStr(virJSONValuePtr *backendPro=
ps,
                           virBitmapPtr userNodeset,
                           virBitmapPtr autoNodeset,
                           const char *memPathReq,
+                          virDomainMemoryAccess memAccessReq,
                           bool force)
 {
     virDomainHugePagePtr master_hugepage =3D NULL;
@@ -3154,6 +3156,9 @@ qemuBuildMemoryBackendStr(virJSONValuePtr *backendPro=
ps,
         memAccess =3D virDomainNumaGetNodeMemoryAccessMode(def->numa, gues=
tNode);
     }
=20
+    if (memAccessReq)
+        memAccess =3D memAccessReq;
+
     if (virDomainNumatuneGetMode(def->numa, guestNode, &mode) < 0 &&
         virDomainNumatuneGetMode(def->numa, -1, &mode) < 0)
         mode =3D VIR_DOMAIN_NUMATUNE_MEM_STRICT;
@@ -3352,7 +3357,9 @@ qemuBuildMemoryCellBackendStr(virDomainDefPtr def,
=20
     if ((rc =3D qemuBuildMemoryBackendStr(&props, &backendType, cfg, qemuC=
aps,
                                         def, cell, memsize, 0, NULL,
-                                        auto_nodeset, NULL, false)) < 0)
+                                        auto_nodeset, NULL,
+                                        VIR_DOMAIN_MEMORY_ACCESS_DEFAULT,
+                                        false)) < 0)
         goto cleanup;
=20
     if (!(*backendStr =3D virQEMUBuildObjectCommandlineFromJSON(backendTyp=
e,
@@ -3394,7 +3401,7 @@ qemuBuildMemoryDimmBackendStr(virDomainMemoryDefPtr m=
em,
     if (qemuBuildMemoryBackendStr(&props, &backendType, cfg, qemuCaps, def,
                                   mem->targetNode, mem->size, mem->pagesiz=
e,
                                   mem->sourceNodes, auto_nodeset, mem->pat=
h,
-                                  true) < 0)
+                                  mem->access, true) < 0)
         goto cleanup;
=20
     ret =3D virQEMUBuildObjectCommandlineFromJSON(backendType, alias, prop=
s);
diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h
index e23930255..e32e1718d 100644
--- a/src/qemu/qemu_command.h
+++ b/src/qemu/qemu_command.h
@@ -135,6 +135,7 @@ int qemuBuildMemoryBackendStr(virJSONValuePtr *backendP=
rops,
                               virBitmapPtr userNodeset,
                               virBitmapPtr autoNodeset,
                               const char *memPath,
+                              virDomainMemoryAccess memAccessReq,
                               bool force);
=20
 char *qemuBuildMemoryDeviceStr(virDomainMemoryDefPtr mem);
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 51b87804d..f2299f66e 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -2219,7 +2219,7 @@ qemuDomainAttachMemory(virQEMUDriverPtr driver,
     if (qemuBuildMemoryBackendStr(&props, &backendType, cfg, priv->qemuCap=
s,
                                   vm->def, mem->targetNode, mem->size,
                                   mem->pagesize, mem->sourceNodes, NULL,
-                                  mem->path, true) < 0)
+                                  mem->path, mem->access, true) < 0)
         goto cleanup;
=20
     if (virDomainMemoryInsert(vm->def, mem) < 0) {
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-acce=
ss.args b/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-access.=
args
new file mode 100644
index 000000000..d398b2294
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-access.args
@@ -0,0 +1,26 @@
+LC_ALL=3DC \
+PATH=3D/bin \
+HOME=3D/home/test \
+USER=3Dtest \
+LOGNAME=3Dtest \
+QEMU_AUDIO_DRV=3Dnone \
+/usr/bin/qemu \
+-name QEMUGuest1 \
+-S \
+-machine pc,accel=3Dtcg,nvdimm=3Don \
+-m size=3D219136k,slots=3D16,maxmem=3D1099511627776k \
+-smp 2,sockets=3D2,cores=3D1,threads=3D1 \
+-numa node,nodeid=3D0,cpus=3D0-1,mem=3D214 \
+-object memory-backend-file,id=3Dmemnvdimm0,prealloc=3Dyes,mem-path=3D/tmp=
/nvdimm,\
+share=3Dno,size=3D536870912 \
+-device nvdimm,node=3D0,memdev=3Dmemnvdimm0,id=3Dnvdimm0,slot=3D0 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
+-nographic \
+-nodefaults \
+-monitor unix:/tmp/lib/domain--1-QEMUGuest1/monitor.sock,server,nowait \
+-no-acpi \
+-boot c \
+-usb \
+-drive file=3D/dev/HostVG/QEMUGuest1,format=3Draw,if=3Dnone,id=3Ddrive-ide=
0-0-0 \
+-device ide-drive,bus=3Dide.0,unit=3D0,drive=3Ddrive-ide0-0-0,id=3Dide0-0-=
0 \
+-device virtio-balloon-pci,id=3Dballoon0,bus=3Dpci.0,addr=3D0x3
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 05a51a389..97a2c55cd 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -2335,6 +2335,8 @@ mymain(void)
             QEMU_CAPS_OBJECT_MEMORY_RAM, QEMU_CAPS_OBJECT_MEMORY_FILE);
     DO_TEST("memory-hotplug-nvdimm", QEMU_CAPS_MACHINE_OPT, QEMU_CAPS_DEVI=
CE_NVDIMM,
             QEMU_CAPS_NUMA, QEMU_CAPS_OBJECT_MEMORY_RAM, QEMU_CAPS_OBJECT_=
MEMORY_FILE);
+    DO_TEST("memory-hotplug-nvdimm-access", QEMU_CAPS_MACHINE_OPT, QEMU_CA=
PS_DEVICE_NVDIMM,
+            QEMU_CAPS_NUMA, QEMU_CAPS_OBJECT_MEMORY_RAM, QEMU_CAPS_OBJECT_=
MEMORY_FILE);
=20
     DO_TEST("machine-aeskeywrap-on-caps",
             QEMU_CAPS_MACHINE_OPT, QEMU_CAPS_AES_KEY_WRAP,
--=20
2.11.0

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From: Michal Privoznik 
To: libvir-list@redhat.com
Date: Mon, 27 Feb 2017 14:19:29 +0100
Message-Id: 
 <9b184feec0beacad731e98972c61f75b93a3de63.1488201118.git.mprivozn@redhat.com>
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Subject: [libvirt] [PATCH v2 07/14] qemu: Introduce label-size for NVDIMMs
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For NVDIMM devices it is optionally possible to specify the size
of internal storage for namespaces. Namespaces are a feature that
allows users to partition the NVDIMM for different uses.

Signed-off-by: Michal Privoznik 
---
 docs/formatdomain.html.in                          |  9 ++++
 docs/schemas/domaincommon.rng                      |  7 +++
 src/conf/domain_conf.c                             | 19 +++++++
 src/conf/domain_conf.h                             |  1 +
 src/qemu/qemu_command.c                            |  3 ++
 .../qemuxml2argv-memory-hotplug-nvdimm-label.args  | 26 ++++++++++
 .../qemuxml2argv-memory-hotplug-nvdimm-label.xml   | 59 ++++++++++++++++++=
++++
 tests/qemuxml2argvtest.c                           |  2 +
 .../qemuxml2xmlout-memory-hotplug-nvdimm-label.xml |  1 +
 tests/qemuxml2xmltest.c                            |  1 +
 10 files changed, 128 insertions(+)
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdi=
mm-label.args
 create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdi=
mm-label.xml
 create mode 120000 tests/qemuxml2xmloutdata/qemuxml2xmlout-memory-hotplug-=
nvdimm-label.xml

diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 00c0df2ce..4a078b577 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -7038,6 +7038,9 @@ qemu-kvm -net nic,model=3D? /dev/null
     <target>
       <size unit=3D'KiB'>524288</size>
       <node>1</node>
+      <label>
+        <size unit=3D'KiB'>128</size>
+      </label>
     </target>
   </memory>
 </devices>
@@ -7117,6 +7120,12 @@ qemu-kvm -net nic,model=3D? /dev/null
           attach the memory to. The element shall be used only if the gues=
t has
           NUMA nodes configured.
         

+        

+          For NVDIMM type devices one can optionally use
+          label and its subelement size
+          to configure the size of namespaces label storage
+          within the NVDIMM module.
+        

       

     
=20
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 78195aae9..aafc731f5 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -4800,6 +4800,13 @@
             
           
         
+        
+          
+            
+              
+            
+          
+        
       
     
   
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index a31114cc7..7840f8e02 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -13824,6 +13824,18 @@ virDomainMemoryTargetDefParseXML(xmlNodePtr node,
                              &def->size, true, false) < 0)
         goto cleanup;
=20
+    if (def->model =3D=3D VIR_DOMAIN_MEMORY_MODEL_NVDIMM) {
+        if (virDomainParseMemory("./label/size", "./label/size/@unit", ctx=
t,
+                                 &def->labelsize, false, false) < 0)
+            goto cleanup;
+
+        if (def->labelsize && def->labelsize < 128) {
+            virReportError(VIR_ERR_XML_ERROR, "%s",
+                           _("nvdimm label must be at least 128KiB"));
+            goto cleanup;
+        }
+    }
+
     ret =3D 0;
=20
  cleanup:
@@ -22663,6 +22675,13 @@ virDomainMemoryTargetDefFormat(virBufferPtr buf,
     virBufferAsprintf(buf, "%llu\n", def->size);
     if (def->targetNode >=3D 0)
         virBufferAsprintf(buf, "%d\n", def->targetNode);
+    if (def->labelsize) {
+        virBufferAddLit(buf, "\n");
+    }
=20
     virBufferAdjustIndent(buf, -2);
     virBufferAddLit(buf, "\n");
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 87516ca69..0e68f5770 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -2013,6 +2013,7 @@ struct _virDomainMemoryDef {
     int model; /* virDomainMemoryModel */
     int targetNode;
     unsigned long long size; /* kibibytes */
+    unsigned long long labelsize; /* kibibytes; valid only for NVDIMM */
=20
     virDomainDeviceInfo info;
 };
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 287387055..91ace8e38 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -3440,6 +3440,9 @@ qemuBuildMemoryDeviceStr(virDomainMemoryDefPtr mem)
         if (mem->targetNode >=3D 0)
             virBufferAsprintf(&buf, "node=3D%d,", mem->targetNode);
=20
+        if (mem->labelsize)
+            virBufferAsprintf(&buf, "label-size=3D%llu,", mem->labelsize *=
 1024);
+
         virBufferAsprintf(&buf, "memdev=3Dmem%s,id=3D%s",
                           mem->info.alias, mem->info.alias);
=20
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-labe=
l.args b/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-label.ar=
gs
new file mode 100644
index 000000000..8669f2d84
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-label.args
@@ -0,0 +1,26 @@
+LC_ALL=3DC \
+PATH=3D/bin \
+HOME=3D/home/test \
+USER=3Dtest \
+LOGNAME=3Dtest \
+QEMU_AUDIO_DRV=3Dnone \
+/usr/bin/qemu \
+-name QEMUGuest1 \
+-S \
+-machine pc,accel=3Dtcg,nvdimm=3Don \
+-m size=3D219136k,slots=3D16,maxmem=3D1099511627776k \
+-smp 2,sockets=3D2,cores=3D1,threads=3D1 \
+-numa node,nodeid=3D0,cpus=3D0-1,mem=3D214 \
+-object memory-backend-file,id=3Dmemnvdimm0,prealloc=3Dyes,mem-path=3D/tmp=
/nvdimm,\
+share=3Dno,size=3D536870912 \
+-device nvdimm,node=3D0,label-size=3D131072,memdev=3Dmemnvdimm0,id=3Dnvdim=
m0,slot=3D0 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
+-nographic \
+-nodefaults \
+-monitor unix:/tmp/lib/domain--1-QEMUGuest1/monitor.sock,server,nowait \
+-no-acpi \
+-boot c \
+-usb \
+-drive file=3D/dev/HostVG/QEMUGuest1,format=3Draw,if=3Dnone,id=3Ddrive-ide=
0-0-0 \
+-device ide-drive,bus=3Dide.0,unit=3D0,drive=3Ddrive-ide0-0-0,id=3Dide0-0-=
0 \
+-device virtio-balloon-pci,id=3Dballoon0,bus=3Dpci.0,addr=3D0x3
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-labe=
l.xml b/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-label.xml
new file mode 100644
index 000000000..425385251
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-label.xml
@@ -0,0 +1,59 @@
+
+  QEMUGuest1
+  c7a5fdbd-edaf-9455-926a-d65c16db1809
+  1099511627776
+  1267710
+  1267710
+  2
+  
+    hvm
+    
+  
+  
+    
+    
+  
+  
+    
+    
+      
+    
+  
+  
+  destroy
+  restart
+  destroy
+  
+    /usr/bin/qemu
+    
+      
+      
+      

+    
+    
+      

+    
+    
+      

+    
+    
+    
+    
+    
+      

+    
+    
+      
+        /tmp/nvdimm
+      
+      
+        523264
+        0
+        
+      
+      

+    
+  
+
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 97a2c55cd..5c05556a3 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -2337,6 +2337,8 @@ mymain(void)
             QEMU_CAPS_NUMA, QEMU_CAPS_OBJECT_MEMORY_RAM, QEMU_CAPS_OBJECT_=
MEMORY_FILE);
     DO_TEST("memory-hotplug-nvdimm-access", QEMU_CAPS_MACHINE_OPT, QEMU_CA=
PS_DEVICE_NVDIMM,
             QEMU_CAPS_NUMA, QEMU_CAPS_OBJECT_MEMORY_RAM, QEMU_CAPS_OBJECT_=
MEMORY_FILE);
+    DO_TEST("memory-hotplug-nvdimm-label", QEMU_CAPS_MACHINE_OPT, QEMU_CAP=
S_DEVICE_NVDIMM,
+            QEMU_CAPS_NUMA, QEMU_CAPS_OBJECT_MEMORY_RAM, QEMU_CAPS_OBJECT_=
MEMORY_FILE);
=20
     DO_TEST("machine-aeskeywrap-on-caps",
             QEMU_CAPS_MACHINE_OPT, QEMU_CAPS_AES_KEY_WRAP,
diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-memory-hotplug-nvdimm-=
label.xml b/tests/qemuxml2xmloutdata/qemuxml2xmlout-memory-hotplug-nvdimm-l=
abel.xml
new file mode 120000
index 000000000..e357ec582
--- /dev/null
+++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-memory-hotplug-nvdimm-label.x=
ml
@@ -0,0 +1 @@
+/home/zippy/work/libvirt/libvirt.git/tests/qemuxml2argvdata/qemuxml2argv-m=
emory-hotplug-nvdimm-label.xml
\ No newline at end of file
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index ef49a79ca..bf62dbbb2 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -1080,6 +1080,7 @@ mymain(void)
     DO_TEST("memory-hotplug-dimm", NONE);
     DO_TEST("memory-hotplug-nvdimm", NONE);
     DO_TEST("memory-hotplug-nvdimm-access", NONE);
+    DO_TEST("memory-hotplug-nvdimm-label", NONE);
     DO_TEST("net-udp", NONE);
=20
     DO_TEST("video-virtio-gpu-device", NONE);
--=20
2.11.0

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From: Michal Privoznik 
To: libvir-list@redhat.com
Date: Mon, 27 Feb 2017 14:19:30 +0100
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X-Scanned-By: MIMEDefang 2.74 on 10.5.11.28
X-loop: libvir-list@redhat.com
Subject: [libvirt] [PATCH v2 08/14] security_dac: Label host side of NVDIMM
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When domain is being started up, we ought to relabel the host
side of NVDIMM so qemu has access to it.

Signed-off-by: Michal Privoznik 
---
 src/security/security_dac.c | 73 +++++++++++++++++++++++++++++++++++++++++=
++++
 1 file changed, 73 insertions(+)

diff --git a/src/security/security_dac.c b/src/security/security_dac.c
index 67219170c..b8601faa5 100644
--- a/src/security/security_dac.c
+++ b/src/security/security_dac.c
@@ -1386,6 +1386,30 @@ virSecurityDACRestoreInputLabel(virSecurityManagerPt=
r mgr,
 }
=20
=20
+static int
+virSecurityDACRestoreMemoryLabel(virSecurityManagerPtr mgr,
+                                 virDomainDefPtr def ATTRIBUTE_UNUSED,
+                                 virDomainMemoryDefPtr mem)
+{
+    virSecurityDACDataPtr priv =3D virSecurityManagerGetPrivateData(mgr);
+    int ret =3D -1;
+
+    switch ((virDomainMemoryModel) mem->model) {
+    case VIR_DOMAIN_MEMORY_MODEL_NVDIMM:
+        ret =3D virSecurityDACRestoreFileLabel(priv, mem->path);
+        break;
+
+    case VIR_DOMAIN_MEMORY_MODEL_DIMM:
+    case VIR_DOMAIN_MEMORY_MODEL_LAST:
+    case VIR_DOMAIN_MEMORY_MODEL_NONE:
+        ret =3D 0;
+        break;
+    }
+
+    return ret;
+}
+
+
 static int
 virSecurityDACRestoreAllLabel(virSecurityManagerPtr mgr,
                               virDomainDefPtr def,
@@ -1425,6 +1449,13 @@ virSecurityDACRestoreAllLabel(virSecurityManagerPtr =
mgr,
             rc =3D -1;
     }
=20
+    for (i =3D 0; i < def->nmems; i++) {
+        if (virSecurityDACRestoreMemoryLabel(mgr,
+                                             def,
+                                             def->mems[i]) < 0)
+            rc =3D -1;
+    }
+
     if (virDomainChrDefForeach(def,
                                false,
                                virSecurityDACRestoreChardevCallback,
@@ -1457,6 +1488,41 @@ virSecurityDACSetChardevCallback(virDomainDefPtr def,
 }
=20
=20
+static int
+virSecurityDACSetMemoryLabel(virSecurityManagerPtr mgr,
+                             virDomainDefPtr def,
+                             virDomainMemoryDefPtr mem)
+
+{
+    virSecurityDACDataPtr priv =3D virSecurityManagerGetPrivateData(mgr);
+    virSecurityLabelDefPtr seclabel;
+    int ret =3D -1;
+    uid_t user;
+    gid_t group;
+
+    seclabel =3D virDomainDefGetSecurityLabelDef(def, SECURITY_DAC_NAME);
+    if (seclabel && !seclabel->relabel)
+        return 0;
+
+    switch ((virDomainMemoryModel) mem->model) {
+    case VIR_DOMAIN_MEMORY_MODEL_NVDIMM:
+        if (virSecurityDACGetIds(seclabel, priv, &user, &group, NULL, NULL=
) < 0)
+            return -1;
+
+        ret =3D virSecurityDACSetOwnership(priv, NULL, mem->path, user, gr=
oup);
+        break;
+
+    case VIR_DOMAIN_MEMORY_MODEL_DIMM:
+    case VIR_DOMAIN_MEMORY_MODEL_LAST:
+    case VIR_DOMAIN_MEMORY_MODEL_NONE:
+        ret =3D 0;
+        break;
+    }
+
+    return ret;
+}
+
+
 static int
 virSecurityDACSetAllLabel(virSecurityManagerPtr mgr,
                           virDomainDefPtr def,
@@ -1496,6 +1562,13 @@ virSecurityDACSetAllLabel(virSecurityManagerPtr mgr,
             return -1;
     }
=20
+    for (i =3D 0; i < def->nmems; i++) {
+        if (virSecurityDACSetMemoryLabel(mgr,
+                                         def,
+                                         def->mems[i]) < 0)
+            return -1;
+    }
+
     if (virDomainChrDefForeach(def,
                                true,
                                virSecurityDACSetChardevCallback,
--=20
2.11.0

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Subject: [libvirt] [PATCH v2 09/14] security_selinux: Label host side of
	NVDIMM
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When domain is being started up, we ought to relabel the host
side of NVDIMM so qemu has access to it.

Signed-off-by: Michal Privoznik 
---
 src/security/security_selinux.c | 66 +++++++++++++++++++++++++++++++++++++=
++++
 1 file changed, 66 insertions(+)

diff --git a/src/security/security_selinux.c b/src/security/security_selinu=
x.c
index e22de0653..223442105 100644
--- a/src/security/security_selinux.c
+++ b/src/security/security_selinux.c
@@ -1381,6 +1381,62 @@ virSecuritySELinuxRestoreInputLabel(virSecurityManag=
erPtr mgr,
 }
=20
=20
+static int
+virSecuritySELinuxSetMemoryLabel(virSecurityManagerPtr mgr,
+                                 virDomainDefPtr def,
+                                 virDomainMemoryDefPtr mem)
+{
+    virSecurityLabelDefPtr seclabel;
+
+    seclabel =3D virDomainDefGetSecurityLabelDef(def, SECURITY_SELINUX_NAM=
E);
+    if (seclabel =3D=3D NULL)
+        return 0;
+
+    switch ((virDomainMemoryModel) mem->model) {
+    case VIR_DOMAIN_MEMORY_MODEL_NVDIMM:
+        if (virSecuritySELinuxSetFilecon(mgr, mem->path,
+                                         seclabel->imagelabel) < 0)
+            return -1;
+        break;
+
+    case VIR_DOMAIN_MEMORY_MODEL_NONE:
+    case VIR_DOMAIN_MEMORY_MODEL_DIMM:
+    case VIR_DOMAIN_MEMORY_MODEL_LAST:
+        break;
+    }
+
+    return 0;
+}
+
+
+static int
+virSecuritySELinuxRestoreMemoryLabel(virSecurityManagerPtr mgr,
+                                     virDomainDefPtr def,
+                                     virDomainMemoryDefPtr mem)
+{
+    int ret =3D -1;
+    virSecurityLabelDefPtr seclabel;
+
+    seclabel =3D virDomainDefGetSecurityLabelDef(def, SECURITY_SELINUX_NAM=
E);
+    if (seclabel =3D=3D NULL)
+        return 0;
+
+    switch ((virDomainMemoryModel) mem->model) {
+    case VIR_DOMAIN_MEMORY_MODEL_NVDIMM:
+        ret =3D virSecuritySELinuxRestoreFileLabel(mgr, mem->path);
+        break;
+
+    case VIR_DOMAIN_MEMORY_MODEL_DIMM:
+    case VIR_DOMAIN_MEMORY_MODEL_NONE:
+    case VIR_DOMAIN_MEMORY_MODEL_LAST:
+        ret =3D 0;
+        break;
+    }
+
+    return ret;
+}
+
+
 static int
 virSecuritySELinuxSetTPMFileLabel(virSecurityManagerPtr mgr,
                                   virDomainDefPtr def,
@@ -2325,6 +2381,11 @@ virSecuritySELinuxRestoreAllLabel(virSecurityManager=
Ptr mgr,
             rc =3D -1;
     }
=20
+    for (i =3D 0; i < def->nmems; i++) {
+        if (virSecuritySELinuxRestoreMemoryLabel(mgr, def, def->mems[i]) <=
 0)
+            return -1;
+    }
+
     for (i =3D 0; i < def->ndisks; i++) {
         virDomainDiskDefPtr disk =3D def->disks[i];
=20
@@ -2711,6 +2772,11 @@ virSecuritySELinuxSetAllLabel(virSecurityManagerPtr =
mgr,
             return -1;
     }
=20
+    for (i =3D 0; i < def->nmems; i++) {
+        if (virSecuritySELinuxSetMemoryLabel(mgr, def, def->mems[i]) < 0)
+            return -1;
+    }
+
     if (def->tpm) {
         if (virSecuritySELinuxSetTPMFileLabel(mgr, def, def->tpm) < 0)
             return -1;
--=20
2.11.0

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From: Michal Privoznik 
To: libvir-list@redhat.com
Date: Mon, 27 Feb 2017 14:19:32 +0100
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 <65eb672b126d1234d66a0d32e03fb66a8df743ea.1488201118.git.mprivozn@redhat.com>
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Subject: [libvirt] [PATCH v2 10/14] security: Introduce internal APIs for
	memdev labelling
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These APIs will be used whenever we are hot (un-)plugging a
memdev.

Signed-off-by: Michal Privoznik 
---
 src/libvirt_private.syms        |  2 ++
 src/security/security_driver.h  |  9 +++++++
 src/security/security_manager.c | 56 +++++++++++++++++++++++++++++++++++++=
++++
 src/security/security_manager.h |  7 ++++++
 src/security/security_stack.c   | 38 ++++++++++++++++++++++++++++
 5 files changed, 112 insertions(+)

diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index bce0487ab..8b87b5fd6 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -1170,6 +1170,7 @@ virSecurityManagerRestoreAllLabel;
 virSecurityManagerRestoreDiskLabel;
 virSecurityManagerRestoreHostdevLabel;
 virSecurityManagerRestoreImageLabel;
+virSecurityManagerRestoreMemoryLabel;
 virSecurityManagerRestoreSavedStateLabel;
 virSecurityManagerSetAllLabel;
 virSecurityManagerSetChildProcessLabel;
@@ -1178,6 +1179,7 @@ virSecurityManagerSetDiskLabel;
 virSecurityManagerSetHostdevLabel;
 virSecurityManagerSetImageFDLabel;
 virSecurityManagerSetImageLabel;
+virSecurityManagerSetMemoryLabel;
 virSecurityManagerSetProcessLabel;
 virSecurityManagerSetSavedStateLabel;
 virSecurityManagerSetSocketLabel;
diff --git a/src/security/security_driver.h b/src/security/security_driver.h
index fa65eb359..0f5cce5f8 100644
--- a/src/security/security_driver.h
+++ b/src/security/security_driver.h
@@ -123,6 +123,12 @@ typedef int (*virSecurityDomainSetImageLabel) (virSecu=
rityManagerPtr mgr,
 typedef int (*virSecurityDomainRestoreImageLabel) (virSecurityManagerPtr m=
gr,
                                                    virDomainDefPtr def,
                                                    virStorageSourcePtr src=
);
+typedef int (*virSecurityDomainSetMemoryLabel) (virSecurityManagerPtr mgr,
+                                                virDomainDefPtr def,
+                                                virDomainMemoryDefPtr mem);
+typedef int (*virSecurityDomainRestoreMemoryLabel) (virSecurityManagerPtr =
mgr,
+                                                    virDomainDefPtr def,
+                                                    virDomainMemoryDefPtr =
mem);
 typedef int (*virSecurityDomainSetPathLabel) (virSecurityManagerPtr mgr,
                                               virDomainDefPtr def,
                                               const char *path);
@@ -152,6 +158,9 @@ struct _virSecurityDriver {
     virSecurityDomainSetImageLabel domainSetSecurityImageLabel;
     virSecurityDomainRestoreImageLabel domainRestoreSecurityImageLabel;
=20
+    virSecurityDomainSetMemoryLabel domainSetSecurityMemoryLabel;
+    virSecurityDomainRestoreMemoryLabel domainRestoreSecurityMemoryLabel;
+
     virSecurityDomainSetDaemonSocketLabel domainSetSecurityDaemonSocketLab=
el;
     virSecurityDomainSetSocketLabel domainSetSecuritySocketLabel;
     virSecurityDomainClearSocketLabel domainClearSecuritySocketLabel;
diff --git a/src/security/security_manager.c b/src/security/security_manage=
r.c
index d8c6facc8..6c777db1e 100644
--- a/src/security/security_manager.c
+++ b/src/security/security_manager.c
@@ -1052,3 +1052,59 @@ virSecurityManagerDomainSetPathLabel(virSecurityMana=
gerPtr mgr,
=20
     return 0;
 }
+
+
+/**
+ * virSecurityManagerSetMemoryLabel:
+ * @mgr: security manager object
+ * @vm: domain definition object
+ * @mem: memory module to operate on
+ *
+ * Labels the host part of a memory module.
+ *
+ * Returns: 0 on success, -1 on error.
+ */
+int
+virSecurityManagerSetMemoryLabel(virSecurityManagerPtr mgr,
+                                     virDomainDefPtr vm,
+                                     virDomainMemoryDefPtr mem)
+{
+    if (mgr->drv->domainSetSecurityMemoryLabel) {
+        int ret;
+        virObjectLock(mgr);
+        ret =3D mgr->drv->domainSetSecurityMemoryLabel(mgr, vm, mem);
+        virObjectUnlock(mgr);
+        return ret;
+    }
+
+    virReportUnsupportedError();
+    return -1;
+}
+
+
+/**
+ * virSecurityManagerRestoreMemoryLabel:
+ * @mgr: security manager object
+ * @vm: domain definition object
+ * @mem: memory module to operate on
+ *
+ * Removes security label from the host part of a memory module.
+ *
+ * Returns: 0 on success, -1 on error.
+ */
+int
+virSecurityManagerRestoreMemoryLabel(virSecurityManagerPtr mgr,
+                                        virDomainDefPtr vm,
+                                        virDomainMemoryDefPtr mem)
+{
+    if (mgr->drv->domainRestoreSecurityMemoryLabel) {
+        int ret;
+        virObjectLock(mgr);
+        ret =3D mgr->drv->domainRestoreSecurityMemoryLabel(mgr, vm, mem);
+        virObjectUnlock(mgr);
+        return ret;
+    }
+
+    virReportUnsupportedError();
+    return -1;
+}
diff --git a/src/security/security_manager.h b/src/security/security_manage=
r.h
index bae8493ee..238e66cd0 100644
--- a/src/security/security_manager.h
+++ b/src/security/security_manager.h
@@ -162,6 +162,13 @@ int virSecurityManagerRestoreImageLabel(virSecurityMan=
agerPtr mgr,
                                         virDomainDefPtr vm,
                                         virStorageSourcePtr src);
=20
+int virSecurityManagerSetMemoryLabel(virSecurityManagerPtr mgr,
+                                     virDomainDefPtr vm,
+                                     virDomainMemoryDefPtr mem);
+int virSecurityManagerRestoreMemoryLabel(virSecurityManagerPtr mgr,
+                                        virDomainDefPtr vm,
+                                        virDomainMemoryDefPtr mem);
+
 int virSecurityManagerDomainSetPathLabel(virSecurityManagerPtr mgr,
                                          virDomainDefPtr vm,
                                          const char *path);
diff --git a/src/security/security_stack.c b/src/security/security_stack.c
index 6056ae321..b02ee18a8 100644
--- a/src/security/security_stack.c
+++ b/src/security/security_stack.c
@@ -627,6 +627,41 @@ virSecurityStackRestoreImageLabel(virSecurityManagerPt=
r mgr,
     return rc;
 }
=20
+static int
+virSecurityStackSetMemoryLabel(virSecurityManagerPtr mgr,
+                               virDomainDefPtr vm,
+                               virDomainMemoryDefPtr mem)
+{
+    virSecurityStackDataPtr priv =3D virSecurityManagerGetPrivateData(mgr);
+    virSecurityStackItemPtr item =3D priv->itemsHead;
+    int rc =3D 0;
+
+    for (; item; item =3D item->next) {
+        if (virSecurityManagerSetMemoryLabel(item->securityManager, vm, me=
m) < 0)
+            rc =3D -1;
+    }
+
+    return rc;
+}
+
+static int
+virSecurityStackRestoreMemoryLabel(virSecurityManagerPtr mgr,
+                                   virDomainDefPtr vm,
+                                   virDomainMemoryDefPtr mem)
+{
+    virSecurityStackDataPtr priv =3D virSecurityManagerGetPrivateData(mgr);
+    virSecurityStackItemPtr item =3D priv->itemsHead;
+    int rc =3D 0;
+
+    for (; item; item =3D item->next) {
+        if (virSecurityManagerRestoreMemoryLabel(item->securityManager,
+                                                 vm, mem) < 0)
+            rc =3D -1;
+    }
+
+    return rc;
+}
+
 static int
 virSecurityStackDomainSetPathLabel(virSecurityManagerPtr mgr,
                                    virDomainDefPtr vm,
@@ -669,6 +704,9 @@ virSecurityDriver virSecurityDriverStack =3D {
     .domainSetSecurityImageLabel        =3D virSecurityStackSetImageLabel,
     .domainRestoreSecurityImageLabel    =3D virSecurityStackRestoreImageLa=
bel,
=20
+    .domainSetSecurityMemoryLabel       =3D virSecurityStackSetMemoryLabel,
+    .domainRestoreSecurityMemoryLabel   =3D virSecurityStackRestoreMemoryL=
abel,
+
     .domainSetSecurityDaemonSocketLabel =3D virSecurityStackSetDaemonSocke=
tLabel,
     .domainSetSecuritySocketLabel       =3D virSecurityStackSetSocketLabel,
     .domainClearSecuritySocketLabel     =3D virSecurityStackClearSocketLab=
el,
--=20
2.11.0

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From: Michal Privoznik 
To: libvir-list@redhat.com
Date: Mon, 27 Feb 2017 14:19:33 +0100
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Subject: [libvirt] [PATCH v2 11/14] secdrivers: Implement memdev relabel APIs
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Signed-off-by: Michal Privoznik 
---
 src/security/security_dac.c     |  3 +++
 src/security/security_nop.c     | 19 +++++++++++++++++++
 src/security/security_selinux.c |  3 +++
 3 files changed, 25 insertions(+)

diff --git a/src/security/security_dac.c b/src/security/security_dac.c
index b8601faa5..fb953f891 100644
--- a/src/security/security_dac.c
+++ b/src/security/security_dac.c
@@ -1975,6 +1975,9 @@ virSecurityDriver virSecurityDriverDAC =3D {
     .domainSetSecurityImageLabel        =3D virSecurityDACSetImageLabel,
     .domainRestoreSecurityImageLabel    =3D virSecurityDACRestoreImageLabe=
l,
=20
+    .domainSetSecurityMemoryLabel       =3D virSecurityDACSetMemoryLabel,
+    .domainRestoreSecurityMemoryLabel   =3D virSecurityDACRestoreMemoryLab=
el,
+
     .domainSetSecurityDaemonSocketLabel =3D virSecurityDACSetDaemonSocketL=
abel,
     .domainSetSecuritySocketLabel       =3D virSecurityDACSetSocketLabel,
     .domainClearSecuritySocketLabel     =3D virSecurityDACClearSocketLabel,
diff --git a/src/security/security_nop.c b/src/security/security_nop.c
index 951125dce..0a9b51528 100644
--- a/src/security/security_nop.c
+++ b/src/security/security_nop.c
@@ -236,6 +236,22 @@ virSecurityDomainSetImageLabelNop(virSecurityManagerPt=
r mgr ATTRIBUTE_UNUSED,
     return 0;
 }
=20
+static int
+virSecurityDomainSetMemoryLabelNop(virSecurityManagerPtr mgr ATTRIBUTE_UNU=
SED,
+                                   virDomainDefPtr def ATTRIBUTE_UNUSED,
+                                   virDomainMemoryDefPtr mem ATTRIBUTE_UNU=
SED)
+{
+    return 0;
+}
+
+static int
+virSecurityDomainRestoreMemoryLabelNop(virSecurityManagerPtr mgr ATTRIBUTE=
_UNUSED,
+                                       virDomainDefPtr def ATTRIBUTE_UNUSE=
D,
+                                       virDomainMemoryDefPtr mem ATTRIBUTE=
_UNUSED)
+{
+    return 0;
+}
+
=20
 virSecurityDriver virSecurityDriverNop =3D {
     .privateDataLen                     =3D 0,
@@ -255,6 +271,9 @@ virSecurityDriver virSecurityDriverNop =3D {
     .domainSetSecurityImageLabel        =3D virSecurityDomainSetImageLabel=
Nop,
     .domainRestoreSecurityImageLabel    =3D virSecurityDomainRestoreImageL=
abelNop,
=20
+    .domainSetSecurityMemoryLabel       =3D virSecurityDomainSetMemoryLabe=
lNop,
+    .domainRestoreSecurityMemoryLabel   =3D virSecurityDomainRestoreMemory=
LabelNop,
+
     .domainSetSecurityDaemonSocketLabel =3D virSecurityDomainSetDaemonSock=
etLabelNop,
     .domainSetSecuritySocketLabel       =3D virSecurityDomainSetSocketLabe=
lNop,
     .domainClearSecuritySocketLabel     =3D virSecurityDomainClearSocketLa=
belNop,
diff --git a/src/security/security_selinux.c b/src/security/security_selinu=
x.c
index 223442105..5c237a5fe 100644
--- a/src/security/security_selinux.c
+++ b/src/security/security_selinux.c
@@ -3007,6 +3007,9 @@ virSecurityDriver virSecurityDriverSELinux =3D {
     .domainSetSecurityImageLabel        =3D virSecuritySELinuxSetImageLabe=
l,
     .domainRestoreSecurityImageLabel    =3D virSecuritySELinuxRestoreImage=
Label,
=20
+    .domainSetSecurityMemoryLabel       =3D virSecuritySELinuxSetMemoryLab=
el,
+    .domainRestoreSecurityMemoryLabel   =3D virSecuritySELinuxRestoreMemor=
yLabel,
+
     .domainSetSecurityDaemonSocketLabel =3D virSecuritySELinuxSetDaemonSoc=
ketLabel,
     .domainSetSecuritySocketLabel       =3D virSecuritySELinuxSetSocketLab=
el,
     .domainClearSecuritySocketLabel     =3D virSecuritySELinuxClearSocketL=
abel,
--=20
2.11.0

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From: Michal Privoznik 
To: libvir-list@redhat.com
Date: Mon, 27 Feb 2017 14:19:34 +0100
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Subject: [libvirt] [PATCH v2 12/14] qemu_hotplug: Relabel memdev
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Now that we have APIs for relabel memdevs on hotplug, fill in the
missing implementation in qemu hotplug code.

The qemuSecurity wrappers might look like overkill for now,
because qemu namespace code does not deal with the nvdimms yet.
Nor does our cgroup code.  But hey, there's cgroup_device_acl
variable in qemu.conf. If users add their /dev/pmem* device in
there, the device is allowed in cgroups and created in the
namespace so they can successfully passthrough it to the domain.
It doesn't look like overkill after all, does it?

Signed-off-by: Michal Privoznik 
---
 src/qemu/qemu_hotplug.c  | 13 +++++++++++
 src/qemu/qemu_security.c | 56 ++++++++++++++++++++++++++++++++++++++++++++=
++++
 src/qemu/qemu_security.h |  8 +++++++
 3 files changed, 77 insertions(+)

diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index f2299f66e..7e837a422 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -2191,6 +2191,7 @@ qemuDomainAttachMemory(virQEMUDriverPtr driver,
     char *objalias =3D NULL;
     const char *backendType;
     bool objAdded =3D false;
+    bool teardownlabel =3D false;
     virJSONValuePtr props =3D NULL;
     virObjectEventPtr event;
     int id;
@@ -2232,6 +2233,10 @@ qemuDomainAttachMemory(virQEMUDriverPtr driver,
         goto removedef;
     }
=20
+    if (qemuSecuritySetMemoryLabel(driver, vm, mem) < 0)
+        goto removedef;
+    teardownlabel =3D true;
+
     qemuDomainObjEnterMonitor(driver, vm);
     rv =3D qemuMonitorAddObject(priv->mon, backendType, objalias, props);
     props =3D NULL; /* qemuMonitorAddObject consumes */
@@ -2266,6 +2271,11 @@ qemuDomainAttachMemory(virQEMUDriverPtr driver,
  audit:
     virDomainAuditMemory(vm, oldmem, newmem, "update", ret =3D=3D 0);
  cleanup:
+    if (mem && ret < 0) {
+        if (teardownlabel && qemuSecurityRestoreMemoryLabel(driver, vm, me=
m) < 0)
+            VIR_WARN("Unable to restore security label on memdev");
+    }
+
     virObjectUnref(cfg);
     VIR_FREE(devstr);
     VIR_FREE(objalias);
@@ -3726,6 +3736,9 @@ qemuDomainRemoveMemoryDevice(virQEMUDriverPtr driver,
     if ((idx =3D virDomainMemoryFindByDef(vm->def, mem)) >=3D 0)
         virDomainMemoryRemove(vm->def, idx);
=20
+    if (qemuSecurityRestoreMemoryLabel(driver, vm, mem) < 0)
+        VIR_WARN("Unable to restore security label on memdev");
+
     virDomainMemoryDefFree(mem);
=20
     /* fix the balloon size */
diff --git a/src/qemu/qemu_security.c b/src/qemu/qemu_security.c
index f2931976b..61934f990 100644
--- a/src/qemu/qemu_security.c
+++ b/src/qemu/qemu_security.c
@@ -245,3 +245,59 @@ qemuSecurityRestoreHostdevLabel(virQEMUDriverPtr drive=
r,
     virSecurityManagerTransactionAbort(driver->securityManager);
     return ret;
 }
+
+
+int
+qemuSecuritySetMemoryLabel(virQEMUDriverPtr driver,
+                           virDomainObjPtr vm,
+                           virDomainMemoryDefPtr mem)
+{
+    int ret =3D -1;
+
+    if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT) &&
+        virSecurityManagerTransactionStart(driver->securityManager) < 0)
+        goto cleanup;
+
+    if (virSecurityManagerSetMemoryLabel(driver->securityManager,
+                                         vm->def,
+                                         mem) < 0)
+        goto cleanup;
+
+    if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT) &&
+        virSecurityManagerTransactionCommit(driver->securityManager,
+                                            vm->pid) < 0)
+        goto cleanup;
+
+    ret =3D 0;
+ cleanup:
+    virSecurityManagerTransactionAbort(driver->securityManager);
+    return ret;
+}
+
+
+int
+qemuSecurityRestoreMemoryLabel(virQEMUDriverPtr driver,
+                               virDomainObjPtr vm,
+                               virDomainMemoryDefPtr mem)
+{
+    int ret =3D -1;
+
+    if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT) &&
+        virSecurityManagerTransactionStart(driver->securityManager) < 0)
+        goto cleanup;
+
+    if (virSecurityManagerRestoreMemoryLabel(driver->securityManager,
+                                             vm->def,
+                                             mem) < 0)
+        goto cleanup;
+
+    if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT) &&
+        virSecurityManagerTransactionCommit(driver->securityManager,
+                                            vm->pid) < 0)
+        goto cleanup;
+
+    ret =3D 0;
+ cleanup:
+    virSecurityManagerTransactionAbort(driver->securityManager);
+    return ret;
+}
diff --git a/src/qemu/qemu_security.h b/src/qemu/qemu_security.h
index 54638908d..04a0b82d4 100644
--- a/src/qemu/qemu_security.h
+++ b/src/qemu/qemu_security.h
@@ -60,4 +60,12 @@ int qemuSecuritySetHostdevLabel(virQEMUDriverPtr driver,
 int qemuSecurityRestoreHostdevLabel(virQEMUDriverPtr driver,
                                     virDomainObjPtr vm,
                                     virDomainHostdevDefPtr hostdev);
+
+int qemuSecuritySetMemoryLabel(virQEMUDriverPtr driver,
+                               virDomainObjPtr vm,
+                               virDomainMemoryDefPtr mem);
+
+int qemuSecurityRestoreMemoryLabel(virQEMUDriverPtr driver,
+                                   virDomainObjPtr vm,
+                                   virDomainMemoryDefPtr mem);
 #endif /* __QEMU_SECURITY_H__ */
--=20
2.11.0

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To: libvir-list@redhat.com
Date: Mon, 27 Feb 2017 14:19:35 +0100
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Some users might want to pass a blockdev or a chardev as a
backend for NVDIMM. In fact, this is expected to be the mostly
used configuration. Therefore libvirt should allow the device in
devices CGroup then.

Signed-off-by: Michal Privoznik 
---
 src/qemu/qemu_cgroup.c  | 49 +++++++++++++++++++++++++++++++++++++++++++++=
++++
 src/qemu/qemu_cgroup.h  |  4 ++++
 src/qemu/qemu_hotplug.c | 10 ++++++++++
 3 files changed, 63 insertions(+)

diff --git a/src/qemu/qemu_cgroup.c b/src/qemu/qemu_cgroup.c
index 42a47a798..8f68a22dc 100644
--- a/src/qemu/qemu_cgroup.c
+++ b/src/qemu/qemu_cgroup.c
@@ -348,6 +348,50 @@ qemuTeardownHostdevCgroup(virDomainObjPtr vm,
 }
=20
=20
+int
+qemuSetupMemoryDevicesCgroup(virDomainObjPtr vm,
+                             virDomainMemoryDefPtr mem)
+{
+    qemuDomainObjPrivatePtr priv =3D vm->privateData;
+    int rv;
+
+    if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_DEVICE=
S))
+        return 0;
+
+    if (mem->model !=3D VIR_DOMAIN_MEMORY_MODEL_NVDIMM)
+        return 0;
+
+    VIR_DEBUG("Setting devices Cgroup for NVDIMM device: %s", mem->path);
+    rv =3D virCgroupAllowDevicePath(priv->cgroup, mem->path,
+                                  VIR_CGROUP_DEVICE_RW, false);
+    virDomainAuditCgroupPath(vm, priv->cgroup, "allow",
+                             mem->path, "rw", rv =3D=3D 0);
+
+    return rv;
+}
+
+
+int
+qemuTeardownMemoryDevicesCgroup(virDomainObjPtr vm,
+                                virDomainMemoryDefPtr mem)
+{
+    qemuDomainObjPrivatePtr priv =3D vm->privateData;
+    int rv;
+
+    if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_DEVICE=
S))
+        return 0;
+
+    if (mem->model !=3D VIR_DOMAIN_MEMORY_MODEL_NVDIMM)
+        return 0;
+
+    rv =3D virCgroupDenyDevicePath(priv->cgroup, mem->path,
+                                 VIR_CGROUP_DEVICE_RWM, false);
+    virDomainAuditCgroupPath(vm, priv->cgroup,
+                             "deny", mem->path, "rwm", rv =3D=3D 0);
+    return rv;
+}
+
+
 static int
 qemuSetupGraphicsCgroup(virDomainObjPtr vm,
                         virDomainGraphicsDefPtr gfx)
@@ -647,6 +691,11 @@ qemuSetupDevicesCgroup(virQEMUDriverPtr driver,
             goto cleanup;
     }
=20
+    for (i =3D 0; i < vm->def->nmems; i++) {
+        if (qemuSetupMemoryDevicesCgroup(vm, vm->def->mems[i]) < 0)
+            goto cleanup;
+    }
+
     for (i =3D 0; i < vm->def->ngraphics; i++) {
         if (qemuSetupGraphicsCgroup(vm, vm->def->graphics[i]) < 0)
             goto cleanup;
diff --git a/src/qemu/qemu_cgroup.h b/src/qemu/qemu_cgroup.h
index 8ae4a72ab..d016ce29d 100644
--- a/src/qemu/qemu_cgroup.h
+++ b/src/qemu/qemu_cgroup.h
@@ -43,6 +43,10 @@ int qemuSetupHostdevCgroup(virDomainObjPtr vm,
 int qemuTeardownHostdevCgroup(virDomainObjPtr vm,
                               virDomainHostdevDefPtr dev)
    ATTRIBUTE_RETURN_CHECK;
+int qemuSetupMemoryDevicesCgroup(virDomainObjPtr vm,
+                                 virDomainMemoryDefPtr mem);
+int qemuTeardownMemoryDevicesCgroup(virDomainObjPtr vm,
+                                    virDomainMemoryDefPtr mem);
 int qemuSetupRNGCgroup(virDomainObjPtr vm,
                        virDomainRNGDefPtr rng);
 int qemuTeardownRNGCgroup(virDomainObjPtr vm,
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 7e837a422..e821596bf 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -2192,6 +2192,7 @@ qemuDomainAttachMemory(virQEMUDriverPtr driver,
     const char *backendType;
     bool objAdded =3D false;
     bool teardownlabel =3D false;
+    bool teardowncgroup =3D false;
     virJSONValuePtr props =3D NULL;
     virObjectEventPtr event;
     int id;
@@ -2233,6 +2234,10 @@ qemuDomainAttachMemory(virQEMUDriverPtr driver,
         goto removedef;
     }
=20
+    if (qemuSetupMemoryDevicesCgroup(vm, mem) < 0)
+        goto removedef;
+    teardowncgroup =3D true;
+
     if (qemuSecuritySetMemoryLabel(driver, vm, mem) < 0)
         goto removedef;
     teardownlabel =3D true;
@@ -2272,6 +2277,8 @@ qemuDomainAttachMemory(virQEMUDriverPtr driver,
     virDomainAuditMemory(vm, oldmem, newmem, "update", ret =3D=3D 0);
  cleanup:
     if (mem && ret < 0) {
+        if (teardowncgroup && qemuTeardownMemoryDevicesCgroup(vm, mem) < 0)
+            VIR_WARN("Unable to remove memory device cgroup ACL on hotplug=
 fail");
         if (teardownlabel && qemuSecurityRestoreMemoryLabel(driver, vm, me=
m) < 0)
             VIR_WARN("Unable to restore security label on memdev");
     }
@@ -3739,6 +3746,9 @@ qemuDomainRemoveMemoryDevice(virQEMUDriverPtr driver,
     if (qemuSecurityRestoreMemoryLabel(driver, vm, mem) < 0)
         VIR_WARN("Unable to restore security label on memdev");
=20
+    if (qemuTeardownMemoryDevicesCgroup(vm, mem) < 0)
+        VIR_WARN("Unable to remove memory device cgroup ACL");
+
     virDomainMemoryDefFree(mem);
=20
     /* fix the balloon size */
--=20
2.11.0

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Signed-off-by: Michal Privoznik 
---
 src/qemu/qemu_domain.c  | 76 +++++++++++++++++++++++++++++++++++++++++++++=
++++
 src/qemu/qemu_domain.h  |  8 ++++++
 src/qemu/qemu_hotplug.c | 11 +++++++
 3 files changed, 95 insertions(+)

diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index f585e6f25..1f6627005 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -7478,6 +7478,37 @@ qemuDomainSetupAllHostdevs(virQEMUDriverConfigPtr cf=
g,
 }
=20
=20
+static int
+qemuDomainSetupMemory(virQEMUDriverConfigPtr cfg ATTRIBUTE_UNUSED,
+                      virDomainMemoryDefPtr mem,
+                      const char *devPath)
+{
+    if (mem->model !=3D VIR_DOMAIN_MEMORY_MODEL_NVDIMM)
+        return 0;
+
+    return qemuDomainCreateDevice(mem->path, devPath, false);
+}
+
+
+static int
+qemuDomainSetupAllMemories(virQEMUDriverConfigPtr cfg,
+                           virDomainObjPtr vm,
+                           const char *devPath)
+{
+    size_t i;
+
+    VIR_DEBUG("Setting up memories");
+    for (i =3D 0; i < vm->def->nmems; i++) {
+        if (qemuDomainSetupMemory(cfg,
+                                  vm->def->mems[i],
+                                  devPath) < 0)
+            return -1;
+    }
+    VIR_DEBUG("Setup all memories");
+    return 0;
+}
+
+
 static int
 qemuDomainSetupChardev(virDomainDefPtr def ATTRIBUTE_UNUSED,
                        virDomainChrDefPtr dev,
@@ -7722,6 +7753,9 @@ qemuDomainBuildNamespace(virQEMUDriverConfigPtr cfg,
     if (qemuDomainSetupAllHostdevs(cfg, vm, devPath) < 0)
         goto cleanup;
=20
+    if (qemuDomainSetupAllMemories(cfg, vm, devPath) < 0)
+        goto cleanup;
+
     if (qemuDomainSetupAllChardevs(cfg, vm, devPath) < 0)
         goto cleanup;
=20
@@ -8180,6 +8214,48 @@ qemuDomainNamespaceTeardownHostdev(virQEMUDriverPtr =
driver,
 }
=20
=20
+int
+qemuDomainNamespaceSetupMemory(virQEMUDriverPtr driver,
+                               virDomainObjPtr vm,
+                               virDomainMemoryDefPtr mem)
+{
+    int ret =3D -1;
+
+    if (!qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
+        return 0;
+
+    if (mem->model !=3D VIR_DOMAIN_MEMORY_MODEL_NVDIMM)
+        return 0;
+
+    if (qemuDomainAttachDeviceMknod(driver, vm, mem->path) < 0)
+        goto cleanup;
+    ret =3D 0;
+ cleanup:
+    return ret;
+}
+
+
+int
+qemuDomainNamespaceTeardownMemory(virQEMUDriverPtr driver,
+                                  virDomainObjPtr vm,
+                                  virDomainMemoryDefPtr mem)
+{
+    int ret =3D -1;
+
+    if (!qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
+        return 0;
+
+    if (mem->model !=3D VIR_DOMAIN_MEMORY_MODEL_NVDIMM)
+        return 0;
+
+    if (qemuDomainDetachDeviceUnlink(driver, vm, mem->path) < 0)
+        goto cleanup;
+    ret =3D 0;
+ cleanup:
+    return ret;
+}
+
+
 int
 qemuDomainNamespaceSetupChardev(virQEMUDriverPtr driver,
                                 virDomainObjPtr vm,
diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
index 72efa3336..2c4ba487a 100644
--- a/src/qemu/qemu_domain.h
+++ b/src/qemu/qemu_domain.h
@@ -834,6 +834,14 @@ int qemuDomainNamespaceTeardownHostdev(virQEMUDriverPt=
r driver,
                                        virDomainObjPtr vm,
                                        virDomainHostdevDefPtr hostdev);
=20
+int qemuDomainNamespaceSetupMemory(virQEMUDriverPtr driver,
+                                   virDomainObjPtr vm,
+                                   virDomainMemoryDefPtr memory);
+
+int qemuDomainNamespaceTeardownMemory(virQEMUDriverPtr driver,
+                                      virDomainObjPtr vm,
+                                      virDomainMemoryDefPtr memory);
+
 int qemuDomainNamespaceSetupChardev(virQEMUDriverPtr driver,
                                     virDomainObjPtr vm,
                                     virDomainChrDefPtr chr);
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index e821596bf..1f85b154d 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -2193,6 +2193,7 @@ qemuDomainAttachMemory(virQEMUDriverPtr driver,
     bool objAdded =3D false;
     bool teardownlabel =3D false;
     bool teardowncgroup =3D false;
+    bool teardowndevice =3D false;
     virJSONValuePtr props =3D NULL;
     virObjectEventPtr event;
     int id;
@@ -2234,6 +2235,10 @@ qemuDomainAttachMemory(virQEMUDriverPtr driver,
         goto removedef;
     }
=20
+    if (qemuDomainNamespaceSetupMemory(driver, vm, mem) < 0)
+        goto removedef;
+    teardowndevice =3D true;
+
     if (qemuSetupMemoryDevicesCgroup(vm, mem) < 0)
         goto removedef;
     teardowncgroup =3D true;
@@ -2281,6 +2286,9 @@ qemuDomainAttachMemory(virQEMUDriverPtr driver,
             VIR_WARN("Unable to remove memory device cgroup ACL on hotplug=
 fail");
         if (teardownlabel && qemuSecurityRestoreMemoryLabel(driver, vm, me=
m) < 0)
             VIR_WARN("Unable to restore security label on memdev");
+        if (teardowndevice &&
+            qemuDomainNamespaceTeardownMemory(driver, vm, mem) <  0)
+            VIR_WARN("Unable to remove memory device from /dev");
     }
=20
     virObjectUnref(cfg);
@@ -3749,6 +3757,9 @@ qemuDomainRemoveMemoryDevice(virQEMUDriverPtr driver,
     if (qemuTeardownMemoryDevicesCgroup(vm, mem) < 0)
         VIR_WARN("Unable to remove memory device cgroup ACL");
=20
+    if (qemuDomainNamespaceTeardownMemory(driver, vm, mem) <  0)
+        VIR_WARN("Unable to remove memory device from /dev");
+
     virDomainMemoryDefFree(mem);
=20
     /* fix the balloon size */
--=20
2.11.0

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