Sorry. Some questions about "Pin the whole guest". Do you mean VmPin equals VmSizeAFAIK, Icelake supports adaptive PEBS and extended PEBS which SkylakeOnly Icelake server has the support for recovering from a EPT violation
doesn't.
But we can still use IA32_PEBS_ENABLE MSR to indicate general-purpose
counter in Skylake.
Is there anything else that only Icelake supports in this patches set?
on the PEBS data structures. To use it on Skylake server you would
need to pin the whole guest, but that is currently not done.
Besides, we have tried this patches set in Icelake. We can use pebs(eg:You would need a guest kernel that supports Icelake server PEBS. 4.18
"perf record -e cycles:pp")
when guest is kernel-5.11, but can't when kernel-4.18. Is there a minimum
guest kernel version requirement?
would need backports for tht.
-Andi