Re: [PATCH] KVM: s390: force bp isolation for VSIE

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On 14.02.2018 12:05, Christian Borntraeger wrote:
> 
> 
> On 02/14/2018 11:37 AM, David Hildenbrand wrote:
>> On 14.02.2018 11:14, Christian Borntraeger wrote:
>>>
>>>
>>> On 02/14/2018 11:06 AM, David Hildenbrand wrote:
>>>> On 14.02.2018 09:34, Christian Borntraeger wrote:
>>>>> If the guest runs with bp isolation when doing a SIE instruction,
>>>>> we must also run the nested guest with bp isolation when emulating
>>>>> that SIE instruction.

This is done by activating BPBC in the lpar, which acts as an override
for lower level guests.

Reviewed-by: Janosch Frank <frankja@xxxxxxxxxxxxxxxxxx>

Maybe also add a short comment, that the fpf bit is a logical or in
shadow_scb?

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