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9cd03f7957
The pconfig feature was enabled in QEMU by accident in 3.1.0. All other newer versions do not support it and it was removed from the Icelake-Server CPU model in QEMU. We don't normally change our CPU models even when QEMU does so to avoid breaking migrations between different versions of libvirt. But we can safely do so in this specific case. QEMU never supported enabling pconfig so any domain which was able to start has pconfig disabled. With a small compatibility hack which explicitly disables pconfig when CPU model equals Icelake-Server in migratable domain definition, only one migration scenario stays broken (and there's nothing we can do about it): from any host to a host with libvirt < 5.10.0 and QEMU > 3.1.0. https://bugzilla.redhat.com/show_bug.cgi?id=1749672 Signed-off-by: Jiri Denemark <jdenemar@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
36 lines
1.4 KiB
XML
36 lines
1.4 KiB
XML
<cpu mode='custom' match='exact'>
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<model fallback='forbid'>Icelake-Server</model>
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<vendor>Intel</vendor>
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<feature policy='require' name='ds'/>
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<feature policy='require' name='acpi'/>
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<feature policy='require' name='ss'/>
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<feature policy='require' name='ht'/>
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<feature policy='require' name='tm'/>
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<feature policy='require' name='pbe'/>
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<feature policy='require' name='dtes64'/>
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<feature policy='require' name='monitor'/>
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<feature policy='require' name='ds_cpl'/>
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<feature policy='require' name='vmx'/>
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<feature policy='require' name='smx'/>
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<feature policy='require' name='est'/>
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<feature policy='require' name='tm2'/>
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<feature policy='require' name='xtpr'/>
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<feature policy='require' name='pdcm'/>
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<feature policy='require' name='dca'/>
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<feature policy='require' name='osxsave'/>
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<feature policy='require' name='tsc_adjust'/>
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<feature policy='require' name='cmt'/>
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<feature policy='require' name='avx512ifma'/>
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<feature policy='require' name='sha-ni'/>
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<feature policy='require' name='ospke'/>
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<feature policy='require' name='stibp'/>
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<feature policy='require' name='arch-capabilities'/>
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<feature policy='require' name='xsaves'/>
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<feature policy='require' name='mbm_total'/>
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<feature policy='require' name='mbm_local'/>
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<feature policy='require' name='invtsc'/>
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<feature policy='require' name='rdctl-no'/>
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<feature policy='require' name='ibrs-all'/>
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<feature policy='require' name='skip-l1dfl-vmentry'/>
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</cpu>
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