On 20.06.22 17:27, Dave Hansen wrote:
> On 6/20/22 03:41, Juergen Gross wrote:
>>> But I'm only guessing - this needs a *lot* more elaboration and
>>> explanation why exactly this is needed.
>>
>> I will correct the code and update the commit message.
> 
> It would also be great to cover the end-user-visible impact of the bug
> and the fix.  It _looks_ like it will probably only affect an SEV
> system's ability to read some EFI data.  That will presumably be pretty
> bad because it ends up reading from an encrypted mapping instead of a
> decrypted one.

Xen doesn't support SEV guests yet. So the only caveat here would be EFI
setting up PAT by itself.

Not sure this is really a real world issue.


Juergen