Before testing with linux 5.11.0-16-generic, qemu 1:5.2+dfsg-9ubuntu2,
libvirt 7.0.0-2ubuntu1:
# virsh domcapabilities |grep Milan
# qemu-system-x86_64 -cpu ? | grep Rome
x86 EPYC-Rome (alias configured by machine type)
x86 EPYC-Rome-v1 AMD EPYC-Rome Processor
After installing proposed for qemu/libvirt:
# virsh domcapabilities
<mode name='host-model' supported='yes'>
<model fallback='forbid'>EPYC-Milan</model>
<vendor>AMD</vendor>
<feature policy='require' name='x2apic'/>
<feature policy='require' name='tsc-deadline'/>
<feature policy='require' name='hypervisor'/>
<feature policy='require' name='tsc_adjust'/>
<feature policy='require' name='vaes'/>
<feature policy='require' name='vpclmulqdq'/>
<feature policy='require' name='spec-ctrl'/>
<feature policy='require' name='stibp'/>
<feature policy='require' name='arch-capabilities'/>
<feature policy='require' name='ssbd'/>
<feature policy='require' name='cmp_legacy'/>
<feature policy='require' name='invtsc'/>
<feature policy='require' name='virt-ssbd'/>
<feature policy='require' name='rdctl-no'/>
<feature policy='require' name='skip-l1dfl-vmentry'/>
<feature policy='require' name='mds-no'/>
<feature policy='require' name='pschange-mc-no'/>
<feature policy='disable' name='svme-addr-chk'/>
</mode>
# qemu-system-x86_64 -cpu ? | grep Rome
x86 EPYC-Rome (alias configured by machine type)
x86 EPYC-Rome-v1 AMD EPYC-Rome Processor
x86 EPYC-Rome-v2 AMD EPYC-Rome Processor
Starting focal instance with:
<cpu mode='custom' match='exact' check='partial'>
<model fallback='allow'>EPYC-Rome</model>
<topology sockets='1' dies='1' cores='1' threads='2'/>
<feature policy='require' name='amd-ssbd'/>
<feature policy='require' name='ibrs'/>
</cpu>
# grep -P 'ssbd|ibrs' /proc/cpuinfo
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb
rdtscp lm rep_good nopl cpuid extd_apicid tsc_known_freq pni pclmulqdq ssse3
fma cx16 sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand hypervisor
lahf_lm cmp_legacy svm cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw
topoext perfctr_core ssbd ibrs ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2
rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves clzero
xsaveerptr wbnoinvd arat npt nrip_save umip rdpid
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https://bugs.launchpad.net/bugs/1921754
Title:
Add missing cpu feature bits in EPYC-Rome model
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1921754/+subscriptions
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