Re: [PATCH v2 02/10] selftests: kvm: s390: Add kvm_s390_sie_block definition for userspace tests

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On Wed, 24 Jul 2024 16:39:28 +0200
Janosch Frank <frankja@xxxxxxxxxxxxx> wrote:

> On 7/23/24 11:31, Christoph Schlameuss wrote:
> > Subsequent tests do require direct manipulation of the SIE instruction.
> > This commit introduces the SIE definition for the selftests.  
> 
> AFAIK ucontrol doesn't allow to manipulate the instruction, it allows 
> manipulation of the *SIE control block* that's handed over as an operand 
> to SIE.
> 

I will clarify that.

Christoph

> > 
> > There are already definitions of this within the kernel.
> > This differs in two ways.
> > * This is the first definition of this in userspace.
> > * This does not require atomicity for the flags.
> > 
> > With the userspace definition of the SIE block layout now being present
> > we can reuse the values in other tests where applicable.
> > 
> > Signed-off-by: Christoph Schlameuss <schlameuss@xxxxxxxxxxxxx>  
> 
> Code looks fine though.





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