Re: [GIT PULL] x86/cpu changes for v3.9

[H. Peter Anvin]

On 02/19/2013 07:47 AM, Ingo Molnar wrote:
> > Those kill a kvm guest with a #GP. Can we apply the fix for it too pls?
> >
> > http://marc.info/?l=linux-kernel&m=136077007423065&w=2
>
> Linus, please skip this pull request, we'll sort it out.

My fault... I was tracking the fix and lost track of the thread.

The problem is that the fix is necessary but not sufficient, as it 
introduces an undesirable host-guest dependency.  In order to allow 
neerw guests to work on older hosts we also should use the 
{rd,wr}msr_safe() functions to manipulate this MSR, with a comment as to 
why.

Boris, could you prepare such a patch, please?

	-hpa


--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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