@Hector
Sapphire rapids never had mpx in the xml, that's why we were removing it only
from Cascade, Ice and Sky.
I just tried libvirt 8.0.0-1ubuntu7.12 on a newly installed 22.04 on a
Sapphire Rapids and now its being detected as Icelake instead of
Broadwell.
The patch removed mpx from Cascadelake, Skylake, Icelake-Server-noTSX
and Icelake-Server, but didn't remove from x86_Icelake-Client-noTSX.xml
and x86_Icelake-Client.xml, as you can see below.
Once I remove it and restart libvirt it gets properly detected as
Sapphire Rapids:
root@dellr760:/usr/share/libvirt/cpu_map# dpkg -s libvirt-daemon | grep Version
Version: 8.0.0-1ubuntu7.12
root@dellr760:/usr/share/libvirt/cpu_map# grep mpx *
x86_Cascadelake-Server-noTSX.xml: <feature name='mpx' removed='yes'/>
x86_Cascadelake-Server.xml: <feature name='mpx' removed='yes'/>
x86_Icelake-Client-noTSX.xml: <feature name='mpx'/>
<-----
x86_Icelake-Client.xml: <feature name='mpx'/>
<-----
x86_Icelake-Server-noTSX.xml: <feature name='mpx' removed='yes'/>
x86_Icelake-Server.xml: <feature name='mpx' removed='yes'/>
x86_Skylake-Client-IBRS.xml: <feature name='mpx' removed='yes'/>
x86_Skylake-Client-noTSX-IBRS.xml: <feature name='mpx' removed='yes'/>
x86_Skylake-Client.xml: <feature name='mpx' removed='yes'/>
x86_Skylake-Server-IBRS.xml: <feature name='mpx' removed='yes'/>
x86_Skylake-Server-noTSX-IBRS.xml: <feature name='mpx' removed='yes'/>
x86_Skylake-Server.xml: <feature name='mpx' removed='yes'/>
x86_features.xml: <feature name='mpx'>
root@dellr760:/usr/share/libvirt/cpu_map# grep mpx x86_Icelake-Client-noTSX.xml
x86_Icelake-Client.xml
x86_Icelake-Client-noTSX.xml: <feature name='mpx'/>
x86_Icelake-Client.xml: <feature name='mpx'/>
root@dellr760:/usr/share/libvirt/cpu_map# sudo virsh capabilities | grep -i
model -m 1; sudo cat /proc/cpuinfo | grep "model name" -m 1
<model>Icelake-Server-noTSX</model>
model name : Intel(R) Xeon(R) Gold
6430
# remove mpx from Icelake-Clients...
root@dellr760:/usr/share/libvirt/cpu_map# grep mpx x86_Icelake-Client-noTSX.xml
x86_Icelake-Client.xml
x86_Icelake-Client-noTSX.xml: <feature name='mpx' removed='yes'/>
x86_Icelake-Client.xml: <feature name='mpx' removed='yes'/>
root@dellr760:/usr/share/libvirt/cpu_map# systemctl restart libvirtd
root@dellr760:/usr/share/libvirt/cpu_map# sudo virsh capabilities | grep -i
model -m 1; sudo cat /proc/cpuinfo | grep "model name" -m 1
<model>SapphireRapids-noTSX</model>
model name : Intel(R) Xeon(R) Gold
6430
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https://bugs.launchpad.net/bugs/2084102
Title:
Sapphire rapids not recognized by virsh capabilities
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