Re: [PATCH v3 26/37] KVM: s390: protvirt: Only sync fmt4 registers

David Hildenbrand
2020-02-21T10:44:05Z

On 20.02.20 11:40, Christian Borntraeger wrote:
> From: Janosch Frank <frankja@linux.ibm.com>
>
> A lot of the registers are controlled by the Ultravisor and never
> visible to KVM. Also some registers are overlayed, like gbea is with
> sidad, which might leak data to userspace.
>
> Hence we sync a minimal set of registers for both SIE formats and then
> check and sync format 2 registers if necessary.
>

Reviewed-by: David Hildenbrand <david@redhat.com>

--
Thanks,

David / dhildenb