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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>
64 lines
2.1 KiB
XML
64 lines
2.1 KiB
XML
<domain type='kvm' id='7'>
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<name>hotplug</name>
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<uuid>d091ea82-29e6-2e34-3005-f02617b36e87</uuid>
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<memory unit='KiB'>4194304</memory>
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<currentMemory unit='KiB'>4194304</currentMemory>
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<vcpu placement='static'>4</vcpu>
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<os>
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<type arch='x86_64' machine='pc'>hvm</type>
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<boot dev='hd'/>
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</os>
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<features>
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<acpi/>
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<apic/>
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<pae/>
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</features>
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<clock offset='utc'/>
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<on_poweroff>destroy</on_poweroff>
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<on_reboot>restart</on_reboot>
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<on_crash>restart</on_crash>
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<devices>
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<emulator>/usr/bin/qemu-system-x86_64</emulator>
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<controller type='usb' index='0'>
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<alias name='usb'/>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
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</controller>
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<controller type='ide' index='0'>
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<alias name='ide'/>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
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</controller>
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<controller type='scsi' index='0' model='virtio-scsi'>
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<alias name='scsi0'/>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
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</controller>
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<controller type='pci' index='0' model='pci-root'>
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<alias name='pci'/>
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</controller>
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<controller type='virtio-serial' index='0'>
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<alias name='virtio-serial0'/>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
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</controller>
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<input type='mouse' bus='ps2'>
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<alias name='input0'/>
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</input>
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<input type='keyboard' bus='ps2'>
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<alias name='input1'/>
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</input>
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<memballoon model='none'/>
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<shmem name='shmem0' role='peer'>
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<model type='ivshmem-plain'/>
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<size unit='M'>4</size>
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<alias name='shmem0'/>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
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</shmem>
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<shmem name='shmem1'>
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<model type='ivshmem-doorbell'/>
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<server path='/var/lib/libvirt/shmem-shmem1-sock'/>
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<msi ioeventfd='on'/>
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<alias name='shmem1'/>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
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</shmem>
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</devices>
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<seclabel type='none' model='none'/>
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</domain>
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