Re: [Xen-devel] Xen PV PTE ABI (or lack thereof)

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 21/01/16 13:17, Andrew Cooper wrote:
> 
> As we see with the Protection Key feature, newer hardware feature start
> using bits which were previously software available, and we absolutely
> don't want to be in a position where our ABI prevents us from ever
> supporting a new feature.

I don't see a problem in not supporting new features in /PV/ guests.

I think we should document the PV ABI as-is. i.e., that these two PTE
bits are not available for PV guest use.

David

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