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KVM: s390: Support for I/O interrupts.

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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.

Reviewed-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Cornelia Huck
2012-12-20 15:32:08 +01:00
committed by Marcelo Tosatti
parent b1c571a50d
commit d8346b7d9b
4 changed files with 116 additions and 2 deletions
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Documentation/virtual/kvm/api.txt
+4
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@@ -2069,6 +2069,10 @@ KVM_S390_INT_VIRTIO (vm) - virtio external interrupt; external interrupt
KVM_S390_INT_SERVICE (vm) - sclp external interrupt; sclp parameter in parm
KVM_S390_INT_EMERGENCY (vcpu) - sigp emergency; source cpu in parm
KVM_S390_INT_EXTERNAL_CALL (vcpu) - sigp external call; source cpu in parm
KVM_S390_INT_IO(ai,cssid,ssid,schid) (vm) - compound value to indicate an
I/O interrupt (ai - adapter interrupt; cssid,ssid,schid - subchannel);
I/O interruption parameters in parm (subchannel) and parm64 (intparm,
interruption subclass)
Note that the vcpu ioctl is asynchronous to vcpu execution.