On Fri, May 17, 2013 at 11:04:51AM +0200, Peter Zijlstra wrote:
> Mostly so that check_hw_exists() doesn't need to know about the vendor
> specifics like where the MSRs live, how many there are etc..
Yep, but there will still be issues with perf when booted on a guest and
kvm not supporting it. And AFAIU, they're signalling this by turning off
CPUID bits so that initializing perf doesn't happen.
So, I think init_hw_perf_events should as a first step look at CPUID
bits and then do anything else. And this is done on Intel with
X86_FEATURE_ARCH_PERFMON. But Robert is fixing this on AMD too so...
Thanks.
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
--
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
