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conf: Introduce 'alignsize' element into xml for NVDIMM memory

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NVDIMM emulation will mmap the backend file, it uses host pagesize
as the alignment of mapping address before, but some backends may
require alignments different from the pagesize. So the 'alignsize'
option is introduced to allow specification of the proper alignment:

<devices>
  ...
  <memory model='nvdimm' access='shared'>
      <source>
          <path>/dev/dax0.0</path>
          <alignsize unit='MiB'>2</alignsize>
      </source>
      <target>
          <size unit='MiB'>4094</size>
          <node>0</node>
          <label>
              <size unit='MiB'>2</size>
          </label>
      </target>
  </memory>
  ...
</devices>

Signed-off-by: Luyao Zhong <luyao.zhong@intel.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
This commit is contained in:
Luyao Zhong
2018-12-20 17:14:40 +08:00
committed by John Ferlan
parent 7dc31fe503
commit 80d1ed9773
7 changed files with 115 additions and 13 deletions
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58
tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.xml Normal file
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@@ -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>

1
tests/qemuxml2xmloutdata/memory-hotplug-nvdimm-align.xml Symbolic link
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@@ -0,0 +1 @@
../qemuxml2argvdata/memory-hotplug-nvdimm-align.xml

1
tests/qemuxml2xmltest.c
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@@ -1116,6 +1116,7 @@ mymain(void)
DO_TEST("memory-hotplug-nvdimm", NONE);
DO_TEST("memory-hotplug-nvdimm-access", NONE);
DO_TEST("memory-hotplug-nvdimm-label", NONE);
DO_TEST("memory-hotplug-nvdimm-align", NONE);
DO_TEST("net-udp", NONE);
DO_TEST("video-virtio-gpu-device", NONE);