Re: [tip:perf/core] x86, tracing, perf: Add trace point for MSR accesses

[H. Peter Anvin]

On December 4, 2015 10:30:17 AM PST, Borislav Petkov <bp@xxxxxxxxx> wrote:
>On Fri, Dec 04, 2015 at 10:28:02AM -0800, Andi Kleen wrote:
>> Because making them GPL would prevent any non GPL driver from
>> using MSRs with tracing compiled in, which doesn't make any sense.
>
>I know what EXPORT_SYMBOL_GPL means - I'm questioning the need of
>making
>them available to non-GPL drivers.

How about this: it is easy too easy to hard code MSR accesses, and the last things we need is alien non-GPL drivers doing their own low-level hacks bypassing these facilities.
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