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Commit 26a4f3c0 authored by Gleb Natapov's avatar Gleb Natapov Committed by Thomas Gleixner
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perf/x86: disable PEBS on a guest entry.



If PMU counter has PEBS enabled it is not enough to disable counter
on a guest entry since PEBS memory write can overshoot guest entry
and corrupt guest memory. Disabling PEBS during guest entry solves
the problem.

Tested-by: default avatarDavid Ahern <dsahern@gmail.com>
Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20120809085234.GI3341@redhat.com


Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent cb37af77
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