Re: [Xen-devel] Intel: Overly restrictive test for availablility of CPUID masking MSRs?

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2010-03-02 at 14:11 +0000, Ian Campbell wrote:

> > Is there a more precise way of detecting the presence of this
> > capability? I've seen:
> >         family > 0x6 || (model > 0x17 || (model = 0x17 && stepping >= 4))
> > suggested but this looks like it matches exactly the same set of
> > processors as the "eax < 0x00010674" in the code before aab9fbd6ffa0
> > which was apparently too lenient?

Or alternatively, is there any reason we can't just use wrmsr_safe
instead to gracefully handle processors which can't cope?

Ian.


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