Public bug reported:
Architectural LBRs (Last Branch Records)
Architectural LBRs (Last Branch Records) enable recording of software
path history by logging taken branches and other control flow transfers
within model-specific registers, and is inherited from legacy LBR. If
CPUID.(EAX=07H, ECX=0):EDX[19] is set to 1, the processor supports
Architectural LBRs. With VMCS support and XSAVE support, the KVM guests
could also use ARCH LBR as well.
Target Linux 5.17
** Affects: kvm (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1954468
Title:
KVM Architectural LBRs
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