https://bugzilla.kernel.org/show_bug.cgi?id=42563
--- Comment #7 from Jay Ren <yongjie....@intel.com> 2012-01-31 01:37:57 ---
(In reply to comment #6)
> (In reply to comment #5)
> > (In reply to comment #4)
> >
> > > Yes. With 'ignore_msrs=y' added when loading kvm module, rhel5.x guest
> > > can boot
> > > up now. As it will effect all the RHEL5.x (e.g.5.3, 5.3) guest, this issue
> > > still need to be fixed.
> >
> > Agree. Gleb, I think we need to restore the perf msrs behaviour to what it
> > was
> > before, when the PMU is not enabled.
>
> Yes, they were special cased for a reason.
I found the bug got fixed in kvm upstream. Gleb, you fixed it by the following
commit?
commit 7f85a520ba8407af6384aac32d829988ab543ebf
Author: Gleb Natapov <g...@redhat.com>
Date: Sun Jan 15 14:17:22 2012 +0200
KVM: do not #GP on perf MSR writes when vPMU is disabled
Return to behaviour perf MSR had before introducing vPMU in case vPMU
is disabled. Some guests access those registers unconditionally and do
not expect it to fail.
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