[libvirt] [RFC 3/3] qemu: update qemu command-line generating for NVDIMM memory

John Ferlan jferlan at redhat.com
Wed Nov 7 21:17:31 UTC 2018



On 10/16/18 10:21 PM, Luyao Zhong wrote:
> According to the result parsing from xml, add corresponding properties
> into QEMU command line, including 'align', 'pmem', 'persistence' and
> 'nvdimm-persistence'. And add testcases related to these properties.
> 
> Signed-off-by: Zhong,Luyao <luyao.zhong at intel.com>
> ---
>  src/qemu/qemu_command.c                            | 25 ++++++++++
>  .../memory-hotplug-nvdimm-align.args               | 31 ++++++++++++
>  .../memory-hotplug-nvdimm-align.xml                | 58 ++++++++++++++++++++++
>  .../memory-hotplug-nvdimm-persistence.args         | 31 ++++++++++++
>  .../memory-hotplug-nvdimm-persistence.xml          | 58 ++++++++++++++++++++++
>  .../memory-hotplug-nvdimm-pmem.args                | 31 ++++++++++++
>  .../memory-hotplug-nvdimm-pmem.xml                 | 58 ++++++++++++++++++++++
>  .../memory-hotplug-nvdimm-unarmed.args             | 31 ++++++++++++
>  .../memory-hotplug-nvdimm-unarmed.xml              | 58 ++++++++++++++++++++++
>  tests/qemuxml2argvtest.c                           | 12 +++++
>  10 files changed, 393 insertions(+)
>  create mode 100644 tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.args
>  create mode 100644 tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.xml
>  create mode 100644 tests/qemuxml2argvdata/memory-hotplug-nvdimm-persistence.args
>  create mode 100644 tests/qemuxml2argvdata/memory-hotplug-nvdimm-persistence.xml
>  create mode 100644 tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.args
>  create mode 100644 tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.xml
>  create mode 100644 tests/qemuxml2argvdata/memory-hotplug-nvdimm-unarmed.args
>  create mode 100644 tests/qemuxml2argvdata/memory-hotplug-nvdimm-unarmed.xml
> 

As I noted in patch2, the .xml files from xml2xmlargvdata belong there...

You are missing qemu_capabilites.{c,h} and friends changes. Many other
examples, but they essentially determine which version the attribute was
added to QEMU and only allow/use it for those versions and beyond.

When adding capabilities, we tend to make them singular patches, but
you'd only need 1 as I assume all the new switches were added for the
same qemu release.  You can note that in the commit message too.

Running make check make-check would have told you:

--- tests/qemuxml2argvdata/memory-hotplug-nvdimm-persistence.args
2018-11-07 12:55:59.165965066 -0500
+++ -	2018-11-07 12:56:21.555957343 -0500
@@ -7,7 +7,8 @@
 /usr/bin/qemu-system-i686 \
 -name QEMUGuest1 \
 -S \
--machine
pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,nvdimm-persistence=mem-ctrl
\
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
+nvdimm-persistence=mem-ctrl \
 -m size=219136k,slots=16,maxmem=1099511627776k \
 -smp 2,sockets=2,cores=1,threads=1 \
 -numa node,nodeid=0,cpus=0-1,mem=214 \
Incorrect line wrapping in
tests/qemuxml2argvdata/memory-hotplug-nvdimm-persistence.args
Use test-wrap-argv.pl to wrap test data files
make: *** [cfg.mk:1139: test-wrap-argv] Error 1


You're also missing a patch to update docs/news.xml to describe your new
feature. So your simple 3 patches have probably blossomed into 12 or so.
 Don't feel the need to post all at the same time. Work through the
<source> changes first, post those, get feedback, maybe get them pushed,
and then go from there.

> diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
> index 887947d..466a466 100644
> --- a/src/qemu/qemu_command.c
> +++ b/src/qemu/qemu_command.c
> @@ -3319,6 +3319,22 @@ qemuBuildMemoryBackendProps(virJSONValuePtr *backendProps,
>      if (virJSONValueObjectAdd(props, "U:size", mem->size * 1024, NULL) < 0)
>          goto cleanup;
>  
> +    if (mem->alignsize) {

mem->alignsize > 0

It's one of my crusades ;-)

> +        if (virJSONValueObjectAdd(props,
> +                                  "U:align",
> +                                  mem->alignsize * 1024,
> +                                  NULL) < 0)
> +            goto cleanup;
> +    }

Please multiple arguments on a line like "U:size" above - just don't go
beyond 80 char wide display...

> +
> +    if (mem->nvdimmPmem) {

This would be bool, so OK.

> +        if (virJSONValueObjectAdd(props,
> +                                  "s:pmem",
> +                                  virTristateSwitchTypeToString(mem->nvdimmPmem),
> +                                  NULL) < 0)

    if (virJSONValueObjectAdd(props, "s:pmem", "on", NULL) < 0)

> +            goto cleanup;
> +    }
> +
>      if (mem->sourceNodes) {
>          nodemask = mem->sourceNodes;
>      } else {
> @@ -3480,6 +3496,10 @@ qemuBuildMemoryDeviceStr(virDomainMemoryDefPtr mem)
>          if (mem->labelsize)
>              virBufferAsprintf(&buf, "label-size=%llu,", mem->labelsize * 1024);
>  
> +        if (mem->nvdimmUnarmed)
> +            virBufferAsprintf(&buf, "unarmed=%s,",
> +                              virTristateSwitchTypeToString(mem->nvdimmUnarmed));

use virBufferAddLit here.  There's other examples.

> +
>          virBufferAsprintf(&buf, "memdev=mem%s,id=%s",
>                            mem->info.alias, mem->info.alias);
>  
> @@ -7256,6 +7276,11 @@ qemuBuildMachineCommandLine(virCommandPtr cmd,
>                  goto cleanup;
>              }
>              virBufferAddLit(&buf, ",nvdimm=on");
> +
> +            if (def->mems[i]->nvdimmPersistence) {

So if more than one entry had this persistence set, then this gets added
multiple times for each... What happens when they're different? And why
would we want to add multiple of the same?

> +                virBufferAsprintf(&buf, ",nvdimm-persistence=%s",
> +                                  virDomainMemoryPersistenceTypeToString(def->mems[i]->nvdimmPersistence));
> +            }
>              break;
>          }
>      }
> diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.args
> new file mode 100644
> index 0000000..432f622
> --- /dev/null
> +++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.args
> @@ -0,0 +1,31 @@
> +LC_ALL=C \
> +PATH=/bin \
> +HOME=/home/test \
> +USER=test \
> +LOGNAME=test \
> +QEMU_AUDIO_DRV=none \
> +/usr/bin/qemu-system-i686 \
> +-name QEMUGuest1 \
> +-S \
> +-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
> +-m size=219136k,slots=16,maxmem=1099511627776k \
> +-smp 2,sockets=2,cores=1,threads=1 \
> +-numa node,nodeid=0,cpus=0-1,mem=214 \
> +-object memory-backend-file,id=memnvdimm0,prealloc=yes,mem-path=/tmp/nvdimm,\
> +share=no,size=536870912,align=2097152 \
> +-device nvdimm,node=0,memdev=memnvdimm0,id=nvdimm0,slot=0 \
> +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
> +-display none \
> +-no-user-config \
> +-nodefaults \
> +-chardev socket,id=charmonitor,path=/tmp/lib/domain--1-QEMUGuest1/monitor.sock,\
> +server,nowait \
> +-mon chardev=charmonitor,id=monitor,mode=control \
> +-rtc base=utc \
> +-no-shutdown \
> +-no-acpi \
> +-usb \
> +-drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-ide0-0-0 \
> +-device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,\
> +bootindex=1 \
> +-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3
> diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.xml b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.xml
> new file mode 100644
> index 0000000..a8c5198
> --- /dev/null
> +++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.xml
> @@ -0,0 +1,58 @@
> +<domain type='qemu'>
> +  <name>QEMUGuest1</name>
> +  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
> +  <maxMemory slots='16' unit='KiB'>1099511627776</maxMemory>
> +  <memory unit='KiB'>1267710</memory>
> +  <currentMemory unit='KiB'>1267710</currentMemory>
> +  <vcpu placement='static' cpuset='0-1'>2</vcpu>
> +  <os>
> +    <type arch='i686' machine='pc'>hvm</type>
> +    <boot dev='hd'/>
> +  </os>
> +  <idmap>
> +    <uid start='0' target='1000' count='10'/>
> +    <gid start='0' target='1000' count='10'/>
> +  </idmap>
> +  <cpu>
> +    <topology sockets='2' cores='1' threads='1'/>
> +    <numa>
> +      <cell id='0' cpus='0-1' memory='219136' unit='KiB'/>
> +    </numa>
> +  </cpu>
> +  <clock offset='utc'/>
> +  <on_poweroff>destroy</on_poweroff>
> +  <on_reboot>restart</on_reboot>
> +  <on_crash>destroy</on_crash>
> +  <devices>
> +    <emulator>/usr/bin/qemu-system-i686</emulator>
> +    <disk type='block' device='disk'>
> +      <driver name='qemu' type='raw'/>
> +      <source dev='/dev/HostVG/QEMUGuest1'/>
> +      <target dev='hda' bus='ide'/>
> +      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
> +    </disk>
> +    <controller type='ide' index='0'>
> +      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
> +    </controller>
> +    <controller type='usb' index='0'>
> +      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
> +    </controller>
> +    <controller type='pci' index='0' model='pci-root'/>
> +    <input type='mouse' bus='ps2'/>
> +    <input type='keyboard' bus='ps2'/>
> +    <memballoon model='virtio'>
> +      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
> +    </memballoon>
> +    <memory model='nvdimm' access='private'>
> +      <source>
> +        <path>/tmp/nvdimm</path>
> +        <alignsize unit='KiB'>2048</alignsize>> +      </source>
> +      <target>
> +        <size unit='KiB'>523264</size>
> +        <node>0</node>
> +      </target>
> +      <address type='dimm' slot='0'/>
> +    </memory>
> +  </devices>
> +</domain>


Please try to trim all these XML files to not include stuff you don't
need... such as idmap, cpu, numa, etc.  I would add the <pmem/> here and
not have a separate test. You can validate both at the same time. In the
long run there's 3 new tests... Each series of patches would add them.

All the separation will be painful, but it is useful especially as it
relates to bisecting where a problem may have begun.

> diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-persistence.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-persistence.args
> new file mode 100644
> index 0000000..8ff03e3
> --- /dev/null
> +++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-persistence.args
> @@ -0,0 +1,31 @@
> +LC_ALL=C \
> +PATH=/bin \
> +HOME=/home/test \
> +USER=test \
> +LOGNAME=test \
> +QEMU_AUDIO_DRV=none \
> +/usr/bin/qemu-system-i686 \
> +-name QEMUGuest1 \
> +-S \
> +-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,nvdimm-persistence=mem-ctrl \
> +-m size=219136k,slots=16,maxmem=1099511627776k \
> +-smp 2,sockets=2,cores=1,threads=1 \
> +-numa node,nodeid=0,cpus=0-1,mem=214 \
> +-object memory-backend-file,id=memnvdimm0,prealloc=yes,mem-path=/tmp/nvdimm,\
> +share=no,size=536870912 \
> +-device nvdimm,node=0,memdev=memnvdimm0,id=nvdimm0,slot=0 \
> +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
> +-display none \
> +-no-user-config \
> +-nodefaults \
> +-chardev socket,id=charmonitor,path=/tmp/lib/domain--1-QEMUGuest1/monitor.sock,\
> +server,nowait \
> +-mon chardev=charmonitor,id=monitor,mode=control \
> +-rtc base=utc \
> +-no-shutdown \
> +-no-acpi \
> +-usb \
> +-drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-ide0-0-0 \
> +-device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,\
> +bootindex=1 \
> +-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3
> diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-persistence.xml b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-persistence.xml
> new file mode 100644
> index 0000000..28f2b7f
> --- /dev/null
> +++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-persistence.xml
> @@ -0,0 +1,58 @@
> +<domain type='qemu'>
> +  <name>QEMUGuest1</name>
> +  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
> +  <maxMemory slots='16' unit='KiB'>1099511627776</maxMemory>
> +  <memory unit='KiB'>1267710</memory>
> +  <currentMemory unit='KiB'>1267710</currentMemory>
> +  <vcpu placement='static' cpuset='0-1'>2</vcpu>
> +  <os>
> +    <type arch='i686' machine='pc'>hvm</type>
> +    <boot dev='hd'/>
> +  </os>
> +  <idmap>
> +    <uid start='0' target='1000' count='10'/>
> +    <gid start='0' target='1000' count='10'/>
> +  </idmap>
> +  <cpu>
> +    <topology sockets='2' cores='1' threads='1'/>
> +    <numa>
> +      <cell id='0' cpus='0-1' memory='219136' unit='KiB'/>
> +    </numa>
> +  </cpu>
> +  <clock offset='utc'/>
> +  <on_poweroff>destroy</on_poweroff>
> +  <on_reboot>restart</on_reboot>
> +  <on_crash>destroy</on_crash>
> +  <devices>
> +    <emulator>/usr/bin/qemu-system-i686</emulator>
> +    <disk type='block' device='disk'>
> +      <driver name='qemu' type='raw'/>
> +      <source dev='/dev/HostVG/QEMUGuest1'/>
> +      <target dev='hda' bus='ide'/>
> +      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
> +    </disk>
> +    <controller type='ide' index='0'>
> +      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
> +    </controller>
> +    <controller type='usb' index='0'>
> +      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
> +    </controller>
> +    <controller type='pci' index='0' model='pci-root'/>
> +    <input type='mouse' bus='ps2'/>
> +    <input type='keyboard' bus='ps2'/>
> +    <memballoon model='virtio'>
> +      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
> +    </memballoon>
> +    <memory model='nvdimm' access='private'>
> +      <source>
> +        <path>/tmp/nvdimm</path>
> +      </source>
> +      <target>
> +        <size unit='KiB'>523264</size>
> +        <node>0</node>
> +        <persistence>mem-ctrl</persistence>
> +      </target>
> +      <address type='dimm' slot='0'/>
> +    </memory>
> +  </devices>
> +</domain>
> diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.args
> new file mode 100644
> index 0000000..d34ac5b
> --- /dev/null
> +++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.args
> @@ -0,0 +1,31 @@
> +LC_ALL=C \
> +PATH=/bin \
> +HOME=/home/test \
> +USER=test \
> +LOGNAME=test \
> +QEMU_AUDIO_DRV=none \
> +/usr/bin/qemu-system-i686 \
> +-name QEMUGuest1 \
> +-S \
> +-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
> +-m size=219136k,slots=16,maxmem=1099511627776k \
> +-smp 2,sockets=2,cores=1,threads=1 \
> +-numa node,nodeid=0,cpus=0-1,mem=214 \
> +-object memory-backend-file,id=memnvdimm0,prealloc=yes,mem-path=/tmp/nvdimm,\
> +share=no,size=536870912,pmem=on \
> +-device nvdimm,node=0,memdev=memnvdimm0,id=nvdimm0,slot=0 \
> +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
> +-display none \
> +-no-user-config \
> +-nodefaults \
> +-chardev socket,id=charmonitor,path=/tmp/lib/domain--1-QEMUGuest1/monitor.sock,\
> +server,nowait \
> +-mon chardev=charmonitor,id=monitor,mode=control \
> +-rtc base=utc \
> +-no-shutdown \
> +-no-acpi \
> +-usb \
> +-drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-ide0-0-0 \
> +-device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,\
> +bootindex=1 \
> +-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3
> diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.xml b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.xml
> new file mode 100644
> index 0000000..b221ddb
> --- /dev/null
> +++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.xml
> @@ -0,0 +1,58 @@
> +<domain type='qemu'>
> +  <name>QEMUGuest1</name>
> +  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
> +  <maxMemory slots='16' unit='KiB'>1099511627776</maxMemory>
> +  <memory unit='KiB'>1267710</memory>
> +  <currentMemory unit='KiB'>1267710</currentMemory>
> +  <vcpu placement='static' cpuset='0-1'>2</vcpu>
> +  <os>
> +    <type arch='i686' machine='pc'>hvm</type>
> +    <boot dev='hd'/>
> +  </os>
> +  <idmap>
> +    <uid start='0' target='1000' count='10'/>
> +    <gid start='0' target='1000' count='10'/>
> +  </idmap>
> +  <cpu>
> +    <topology sockets='2' cores='1' threads='1'/>
> +    <numa>
> +      <cell id='0' cpus='0-1' memory='219136' unit='KiB'/>
> +    </numa>
> +  </cpu>
> +  <clock offset='utc'/>
> +  <on_poweroff>destroy</on_poweroff>
> +  <on_reboot>restart</on_reboot>
> +  <on_crash>destroy</on_crash>
> +  <devices>
> +    <emulator>/usr/bin/qemu-system-i686</emulator>
> +    <disk type='block' device='disk'>
> +      <driver name='qemu' type='raw'/>
> +      <source dev='/dev/HostVG/QEMUGuest1'/>
> +      <target dev='hda' bus='ide'/>
> +      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
> +    </disk>
> +    <controller type='ide' index='0'>
> +      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
> +    </controller>
> +    <controller type='usb' index='0'>
> +      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
> +    </controller>
> +    <controller type='pci' index='0' model='pci-root'/>
> +    <input type='mouse' bus='ps2'/>
> +    <input type='keyboard' bus='ps2'/>
> +    <memballoon model='virtio'>
> +      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
> +    </memballoon>
> +    <memory model='nvdimm' access='private'>
> +      <source>
> +        <path>/tmp/nvdimm</path>
> +        <pmem>on</pmem>
> +      </source>
> +      <target>
> +        <size unit='KiB'>523264</size>
> +        <node>0</node>
> +      </target>
> +      <address type='dimm' slot='0'/>
> +    </memory>
> +  </devices>
> +</domain>
> diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-unarmed.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-unarmed.args
> new file mode 100644
> index 0000000..64dcc5a
> --- /dev/null
> +++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-unarmed.args
> @@ -0,0 +1,31 @@
> +LC_ALL=C \
> +PATH=/bin \
> +HOME=/home/test \
> +USER=test \
> +LOGNAME=test \
> +QEMU_AUDIO_DRV=none \
> +/usr/bin/qemu-system-i686 \
> +-name QEMUGuest1 \
> +-S \
> +-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
> +-m size=219136k,slots=16,maxmem=1099511627776k \
> +-smp 2,sockets=2,cores=1,threads=1 \
> +-numa node,nodeid=0,cpus=0-1,mem=214 \
> +-object memory-backend-file,id=memnvdimm0,prealloc=yes,mem-path=/tmp/nvdimm,\
> +share=no,size=536870912 \
> +-device nvdimm,node=0,unarmed=on,memdev=memnvdimm0,id=nvdimm0,slot=0 \
> +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
> +-display none \
> +-no-user-config \
> +-nodefaults \
> +-chardev socket,id=charmonitor,path=/tmp/lib/domain--1-QEMUGuest1/monitor.sock,\
> +server,nowait \
> +-mon chardev=charmonitor,id=monitor,mode=control \
> +-rtc base=utc \
> +-no-shutdown \
> +-no-acpi \
> +-usb \
> +-drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-ide0-0-0 \
> +-device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,\
> +bootindex=1 \
> +-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3
> diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-unarmed.xml b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-unarmed.xml
> new file mode 100644
> index 0000000..f60abbf
> --- /dev/null
> +++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-unarmed.xml
> @@ -0,0 +1,58 @@
> +<domain type='qemu'>
> +  <name>QEMUGuest1</name>
> +  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
> +  <maxMemory slots='16' unit='KiB'>1099511627776</maxMemory>
> +  <memory unit='KiB'>1267710</memory>
> +  <currentMemory unit='KiB'>1267710</currentMemory>
> +  <vcpu placement='static' cpuset='0-1'>2</vcpu>
> +  <os>
> +    <type arch='i686' machine='pc'>hvm</type>
> +    <boot dev='hd'/>
> +  </os>
> +  <idmap>
> +    <uid start='0' target='1000' count='10'/>
> +    <gid start='0' target='1000' count='10'/>
> +  </idmap>
> +  <cpu>
> +    <topology sockets='2' cores='1' threads='1'/>
> +    <numa>
> +      <cell id='0' cpus='0-1' memory='219136' unit='KiB'/>
> +    </numa>
> +  </cpu>
> +  <clock offset='utc'/>
> +  <on_poweroff>destroy</on_poweroff>
> +  <on_reboot>restart</on_reboot>
> +  <on_crash>destroy</on_crash>
> +  <devices>
> +    <emulator>/usr/bin/qemu-system-i686</emulator>
> +    <disk type='block' device='disk'>
> +      <driver name='qemu' type='raw'/>
> +      <source dev='/dev/HostVG/QEMUGuest1'/>
> +      <target dev='hda' bus='ide'/>
> +      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
> +    </disk>
> +    <controller type='ide' index='0'>
> +      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
> +    </controller>
> +    <controller type='usb' index='0'>
> +      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
> +    </controller>
> +    <controller type='pci' index='0' model='pci-root'/>
> +    <input type='mouse' bus='ps2'/>
> +    <input type='keyboard' bus='ps2'/>
> +    <memballoon model='virtio'>
> +      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
> +    </memballoon>
> +    <memory model='nvdimm' access='private'>
> +      <source>
> +        <path>/tmp/nvdimm</path>
> +      </source>
> +      <target>
> +        <size unit='KiB'>523264</size>
> +        <node>0</node>
> +        <unarmed>on</unarmed>
> +      </target>
> +      <address type='dimm' slot='0'/>
> +    </memory>
> +  </devices>
> +</domain>
> diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
> index a7cde3e..05ffca5 100644
> --- a/tests/qemuxml2argvtest.c
> +++ b/tests/qemuxml2argvtest.c
> @@ -2717,6 +2717,18 @@ mymain(void)
>      DO_TEST("memory-hotplug-nvdimm-label",
>              QEMU_CAPS_DEVICE_NVDIMM,
>              QEMU_CAPS_NUMA, QEMU_CAPS_OBJECT_MEMORY_RAM, QEMU_CAPS_OBJECT_MEMORY_FILE);
> +    DO_TEST("memory-hotplug-nvdimm-align",
> +            QEMU_CAPS_DEVICE_NVDIMM,
> +            QEMU_CAPS_NUMA, QEMU_CAPS_OBJECT_MEMORY_RAM, QEMU_CAPS_OBJECT_MEMORY_FILE);
> +    DO_TEST("memory-hotplug-nvdimm-pmem",
> +            QEMU_CAPS_DEVICE_NVDIMM,
> +            QEMU_CAPS_NUMA, QEMU_CAPS_OBJECT_MEMORY_RAM, QEMU_CAPS_OBJECT_MEMORY_FILE);
> +    DO_TEST("memory-hotplug-nvdimm-persistence",
> +            QEMU_CAPS_DEVICE_NVDIMM,
> +            QEMU_CAPS_NUMA, QEMU_CAPS_OBJECT_MEMORY_RAM, QEMU_CAPS_OBJECT_MEMORY_FILE);
> +    DO_TEST("memory-hotplug-nvdimm-unarmed",
> +            QEMU_CAPS_DEVICE_NVDIMM,
> +            QEMU_CAPS_NUMA, QEMU_CAPS_OBJECT_MEMORY_RAM, QEMU_CAPS_OBJECT_MEMORY_FILE);
>  

These should be DO_TEST_CAPS_LATEST...

John

>      DO_TEST("machine-aeskeywrap-on-caps",
>              QEMU_CAPS_AES_KEY_WRAP,
> 




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