Andi Kleen <[email protected]> writes: >> >>> Signed-off-by: Kan Liang <[email protected]> >> >> And here I thought that Andi was of the opinion that if you set CPUID to >> indicate a particular CPU you had better also handle all its MSRs. > > Yes, philosophically that would be the right way, > but we needed a short term fix to stop things from crashing, and that > was the simplest.
I should add there is another reason for this patch now, and doing it in perf instead of somewhere else (this should probably go into the description). With PT on enabling LBR can #GP. So perf needs to handle this case without crashing. This can happen independently of any hypervisors. -Andi -- [email protected] -- Speaking for myself only -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
