On Mon, 29 Sep 2014 09:39:16 -0700, Andy Lutomirski said: > Would it make sense to restrict rdpmc to tasks that are in mms that > have a perf_event mapping? After all, unless I misunderstand > something, user code can't reliably use rdpmc unless they've mapped a > perf_event object to check the rdpmc bit and figure out what ecx value > to use.
Wouldn't that be trivially easy for an attacker to bypass? Just map a dummy perf_event object and then go to town?
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