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libvirt/tests/qemuxml2argvdata/cpu-phys-bits-emulate.xml
Dario Faggioli 1c1a7cdd40 qemu: Add support for max physical address size
This patch maps /domain/cpu/maxphysaddr into -cpu parameters:

  - <maxphysaddr mode='passthrough'/> becomes host-phys-bits=on
  - <maxphysaddr mode='emualte' bits='42'/> becomes phys-bits=42

Passthrough mode can only be used if the chosen CPU model is
'host-passthrough'. Also validate that an explicitly specified
bits value does not exceed the physical address bits on the host.

The feature is available since QEMU 2.7.0.

Signed-off-by: Dario Faggioli <dfaggioli@suse.com>
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2022-08-04 09:04:16 +02:00

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XML

<domain type='kvm'>
<name>foo</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='x86_64' machine='pc'>hvm</type>
<boot dev='hd'/>
</os>
<cpu mode='host-passthrough'>
<maxphysaddr mode='emulate' bits='42'/>
</cpu>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
</devices>
</domain>