Re: [RFC PATCH v3 04/20] x86: Handle reduction in physical address size with SME

[Tom Lendacky]

On 11/15/2016 6:14 AM, Borislav Petkov wrote:
> On Tue, Nov 15, 2016 at 01:10:35PM +0100, Joerg Roedel wrote:
>> Maybe add a comment here why you can't use cpu_has (yet).
> 
> So that could be alleviated by moving this function *after*
> init_scattered_cpuid_features(). Then you can simply do *cpu_has().
> 

Hmmm... I still need the ebx value from the CPUID instruction to
calculate the proper reduction in physical bits, so I'll still need
to make the CPUID call.

Thanks,
Tom

> Also, I'm not sure why we're checking CPUID for the SME feature when we
> have sme_get_me_mask() et al which have been setup much earlier...
>