Re: [PATCHv2 0/5] x86: Enumerate TME and PCONFIG, add MKTME_KEY_PROG helper

[Dave Hansen]

On 02/07/2018 04:59 AM, Kirill A. Shutemov wrote:
> The patchset does some ground work for MKTME enabling:
>   - Adds two new cpufeatures: TME and PCONFIG;
>   - Detects if BIOS enabled TME and MKTME;
>   - Enumerates what PCONFIG targets are supported;
>   - Provides helper to program encryption keys into CPU;
> 
> As part of TME enumeration we check of how many bits from physical address
> are claimed for encryption key ID. This may be critical as we or guest VM
> must not use these bits for physical address.

For this kind of stuff, I'd really appreciate if you included some
high-level descriptions.  I'd assume that a reviewer has no idea what
PCONFIG or MKTME is.

It would also be really nice to say which hardware will implement this.
Is it in particular CPUs today, for instance?