Re: [PATCH v2 1/7] s390/kvm: Support for I/O interrupts.

Cornelia Huck
2012-09-05T08:26:00Z

On Wed, 05 Sep 2012 10:28:53 +0300
Avi Kivity <avi@redhat.com> wrote:

> On 09/04/2012 06:13 PM, Cornelia Huck wrote:
> > Add support for handling I/O interrupts (standard, subchannel-related
> > ones and rudimentary adapter interrupts).
> >
> > The subchannel-identifying parameters are encoded into the interrupt
> > type.
> >
> > I/O interrupts are floating, so they can't be injected on a specific
> > vcpu.
> >
> > diff --git a/include/linux/kvm.h b/include/linux/kvm.h
> > index d808694..5a36e65 100644
> > --- a/include/linux/kvm.h
> > +++ b/include/linux/kvm.h
> > @@ -396,6 +396,12 @@ struct kvm_s390_psw {
> > #define KVM_S390_INT_SERVICE 0xffff2401u
> > #define KVM_S390_INT_EMERGENCY 0xffff1201u
> > #define KVM_S390_INT_EXTERNAL_CALL 0xffff1202u
> > +#define KVM_S390_INT_IO(ai,cssid,ssid,schid) \
> > + (((schid)) | \
> > + ((ssid) << 16) | \
> > + ((cssid) << 18) | \
> > + ((ai) << 26))
> > +
> >
>
> Documentation?
>

KVM_S390_INTERRUPT is currently completely undocumented... I'll
probably do an extra patch and then have this and the machine check
patch add the new values.