This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1954468
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1954468
Title:
KVM Architectural LBRs
Status in linux package in Ubuntu:
Incomplete
Bug description:
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
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