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

From: H. Peter Anvin
Date: Tue Feb 19 2013 - 12:53:22 EST

On 02/19/2013 09:47 AM, Borislav Petkov wrote:
On Tue, Feb 19, 2013 at 09:38:31AM -0800, H. Peter Anvin wrote:
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?

I don't think Boris O. is at AMD anymore. Want me to add that to my fix
for kvm or prep a separate patch?

Separate patch, please, and yes, I would greatly appreciate it.


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

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