Re: [PATCH v9 3/3] s390x: KVM: resetting the Topology-Change-Report

[Pierre Morel]

On 5/12/22 12:01, David Hildenbrand wrote:
> > > I think we prefer something like u16 when copying to user space.
> >
> > but then userspace also has to expect a u16, right?
>
> Yep.

Yes but in fact, inspired by previous discussion I had on the VFIO 
interface, that is the reason why I did prefer an int.
It is much simpler than a u16 and the definition of a bit.

Despite a bit in a u16 is what the s3990 achitecture proposes I thought 
we could make it easier on the KVM/QEMU interface.

But if the discussion stops here, I will do as you both propose change 
to u16 in KVM and userland and add the documentation for the interface.

Regards,
Pierre

--
Pierre Morel
IBM Lab Boeblingen