libvirt/tests/qemuxml2argvdata/shmem-plain-doorbell.xml
Wang Xin 493d2769f2 qemu: add support for shmem-{plain, doorbell} role
Role(master or peer) controls how the domain behaves on migration.
For more details about migration with ivshmem, see
https://git.qemu.org/?p=qemu.git;a=blob_plain;f=docs/system/ivshmem.rst;hb=HEAD

It's a optional attribute in libvirt, and qemu will choose default
role for ivshmem device if the user is not specified.

With device property 'role', the value can be 'master' or 'peer'.
 - 'master' (means 'master=on' in qemu), the guest will copy
   the shared memory on migration to the destination host.
 - 'peer' (means 'master=off' in qemu), the migration is disabled.

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Signed-off-by: Yang Hang <yanghang44@huawei.com>
Signed-off-by: Wang Xin <wangxinxin.wang@huawei.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
2020-08-03 10:57:47 +02:00

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XML

<domain type='qemu'>
<name>QEMUGuest1</name>
<uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
<memory unit='KiB'>219136</memory>
<currentMemory unit='KiB'>219136</currentMemory>
<vcpu placement='static'>1</vcpu>
<os>
<type arch='i686' machine='pc'>hvm</type>
<boot dev='hd'/>
</os>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/bin/qemu-system-i386</emulator>
<controller type='usb' index='0'/>
<controller type='pci' index='0' model='pci-root'/>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<memballoon model='none'/>
<shmem name='shmem0'>
<model type='ivshmem-plain'/>
</shmem>
<shmem name='shmem1' role='peer'>
<model type='ivshmem-plain'/>
<size unit='M'>128</size>
</shmem>
<shmem name='shmem2' role='master'>
<model type='ivshmem-plain'/>
<size unit='M'>256</size>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</shmem>
<shmem name='shmem3'>
<model type='ivshmem-doorbell'/>
<server/>
</shmem>
<shmem name='shmem4'>
<model type='ivshmem-doorbell'/>
<server path='/tmp/shmem4-sock'/>
</shmem>
<shmem name='shmem5'>
<model type='ivshmem-doorbell'/>
<server path='/tmp/shmem5-sock'/>
<msi ioeventfd='off'/>
</shmem>
<shmem name='shmem6'>
<model type='ivshmem-doorbell'/>
<server path='/tmp/shmem6-sock'/>
<msi vectors='16'/>
</shmem>
<shmem name='shmem7'>
<model type='ivshmem-doorbell'/>
<server path='/tmp/shmem7-sock'/>
<msi vectors='32' ioeventfd='on'/>
</shmem>
</devices>
</domain>