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2017 Jun 19
2
Question about disabling '3dnowprefetch' CPU feature in Xen Guest using libvirt
...3.git0.2.fc26.x86_64
xen-4.8.1-2.fc26.x86_64
libvirt-3.2.1-1.fc26.x86_64
I can disable '3dnowprefetch' CPU feature in guest via 'xl' command,
with adding `cpuid='host,3dnowprefetch=0'` into the CFG file.
However, follow the instruction (https://libvirt.org/
formatdomain.html#elementsCPU), I added the following block into my XML
file:
```
<cpu mode='host-passthrough' check='none'>
<feature policy='disable' name='3dnowprefetch'/>
</cpu>
```
Created the instance, seemed this feature was not being disa...