libvirt/tests/cputestdata/x86_64-host+min.xml

<cpu mode='custom' match='exact'>
  <model fallback='allow'>Penryn</model>
  <feature policy='require' name='dca'/>
  <feature policy='require' name='xtpr'/>
  <feature policy='require' name='tm2'/>
  <feature policy='require' name='est'/>
  <feature policy='require' name='vmx'/>
  <feature policy='require' name='ds_cpl'/>
  <feature policy='require' name='monitor'/>
  <feature policy='require' name='pbe'/>
  <feature policy='require' name='tm'/>
  <feature policy='require' name='ht'/>
  <feature policy='require' name='ss'/>
  <feature policy='require' name='acpi'/>
  <feature policy='require' name='ds'/>
  <feature policy='require' name='vme'/>
</cpu>
Add support for cpu mode attribute The mode can be either of "custom" (default), "host-model", "host-passthrough". The semantics of each mode is described in the following examples: - guest CPU is a default model with specified topology: <cpu> <topology sockets='1' cores='2' threads='1'/> </cpu> - guest CPU matches selected model: <cpu mode='custom' match='exact'> <model>core2duo</model> </cpu> - guest CPU should be a copy of host CPU as advertised by capabilities XML (this is a short cut for manually copying host CPU specification from capabilities to domain XML): <cpu mode='host-model'/> In case a hypervisor does not support the exact host model, libvirt automatically falls back to a closest supported CPU model and removes/adds features to match host. This behavior can be disabled by <cpu mode='host-model'> <model fallback='forbid'/> </cpu> - the same as previous returned by virDomainGetXMLDesc with VIR_DOMAIN_XML_UPDATE_CPU flag: <cpu mode='host-model' match='exact'> <model fallback='allow'>Penryn</model> --+ <vendor>Intel</vendor> \| <topology sockets='2' cores='4' threads='1'/> + copied from <feature policy='require' name='dca'/> \| capabilities XML <feature policy='require' name='xtpr'/> \| ... --+ </cpu> - guest CPU should be exactly the same as host CPU even in the aspects libvirt doesn't model (such domain cannot be migrated unless both hosts contain exactly the same CPUs): <cpu mode='host-passthrough'/> - the same as previous returned by virDomainGetXMLDesc with VIR_DOMAIN_XML_UPDATE_CPU flag: <cpu mode='host-passthrough' match='minimal'> <model>Penryn</model> --+ copied from caps <vendor>Intel</vendor> \| XML but doesn't <topology sockets='2' cores='4' threads='1'/> \| describe all <feature policy='require' name='dca'/> \| aspects of the <feature policy='require' name='xtpr'/> \| actual guest CPU ... --+ </cpu> 2011-08-18 10:14:36 +00:00			`<cpu mode='custom' match='exact'>`
cpu: Optionally forbid fallback CPU models In case a hypervisor doesn't support the exact CPU model requested by a domain XML, we automatically fallback to a closest CPU model the hypervisor supports (and make sure we add/remove any additional features if needed). This patch adds 'fallback' attribute to model element, which can be used to disable this automatic fallback. 2011-12-21 13:27:16 +00:00			`<model fallback='allow'>Penryn</model>`
cpu_x86: Use array of features in CPU map There's no reason for keeping the features in a linked list. Especially when we know upfront the total number of features we are loading. Signed-off-by: Jiri Denemark <jdenemar@redhat.com> 2016-05-17 13:15:40 +00:00			`<feature policy='require' name='dca'/>`
cpu: Rework cpuUpdate The reworked API is now called virCPUUpdate and it should change the provided CPU definition into a one which can be consumed by the QEMU command line builder: - host-passthrough remains unchanged - host-model is turned into custom CPU with a model and features copied from host - custom CPU with minimum match is converted similarly to host-model - optional features are updated according to host's CPU Signed-off-by: Jiri Denemark <jdenemar@redhat.com> 2016-06-23 13:27:07 +00:00			`<feature policy='require' name='xtpr'/>`
			`<feature policy='require' name='tm2'/>`
			`<feature policy='require' name='est'/>`
			`<feature policy='require' name='vmx'/>`
			`<feature policy='require' name='ds_cpl'/>`
			`<feature policy='require' name='monitor'/>`
			`<feature policy='require' name='pbe'/>`
			`<feature policy='require' name='tm'/>`
			`<feature policy='require' name='ht'/>`
			`<feature policy='require' name='ss'/>`
			`<feature policy='require' name='acpi'/>`
			`<feature policy='require' name='ds'/>`
			`<feature policy='require' name='vme'/>`
tests: Add unit tests for internal CPU APIs 2010-10-07 14:35:17 +00:00			`</cpu>`