FYI, this patch series also break 'msr' test in kvm-unit tests.
(kvm/queue of today, and master of the kvm-unit-tests repo)
The test tries to set the MSR_IA32_MISC_ENABLE to 0x400c51889 and gets #GP.
Commenting this out, gets rid of #GP, but test still fails with unexpected result
if (!msr_info->host_initiated &&
((old_val ^ data) & MSR_IA32_MISC_ENABLE_PEBS_UNAVAIL))
return 1;
It is very possible that the test is broken, I'll check this later.