libvirt/tests/qemuhotplugtestdevices/qemuhotplug-ivshmem-plain-detach.xml

<shmem name='shmem0' role='peer'>
  <model type='ivshmem-plain'/>
  <size unit='M'>4</size>
  <alias name='shmem0'/>
  <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
</shmem>
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> 2020-07-24 03:34:11 +00:00			`<shmem name='shmem0' role='peer'>`
qemu: Add support for hot/cold-(un)plug of shmem devices This is needed in order to migrate a domain with shmem devices as that is not allowed to migrate. Signed-off-by: Martin Kletzander <mkletzan@redhat.com> 2016-09-12 13:40:48 +00:00			`<model type='ivshmem-plain'/>`
			`<size unit='M'>4</size>`
			`<alias name='shmem0'/>`
			`<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>`
			`</shmem>`