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KVM: s390: a VCPU may only stop when no interrupts are left pending

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As a SIGP STOP is an interrupt with the least priority, it may only result
in stop of the vcpu when no other interrupts are left pending.

To detect whether a non-stop irq is pending, we need a way to mask out
stop irqs from the general kvm_cpu_has_interrupt() function. For this
reason, the existing function (with an outdated name) is replaced by
kvm_s390_vcpu_has_irq() which allows to mask out pending stop irqs.

Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
David Hildenbrand
2014-08-05 17:40:47 +02:00
committed by Christian Borntraeger
parent 6cddd432e3
commit 9a022067ad
4 changed files with 9 additions and 5 deletions
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4
arch/s390/kvm/kvm-s390.c
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@@ -806,7 +806,7 @@ out:
int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
{
return kvm_cpu_has_interrupt(vcpu);
return kvm_s390_vcpu_has_irq(vcpu, 0);
}
void s390_vcpu_block(struct kvm_vcpu *vcpu)
@@ -1241,7 +1241,7 @@ static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu)
return 0;
if (psw_extint_disabled(vcpu))
return 0;
if (kvm_cpu_has_interrupt(vcpu))
if (kvm_s390_vcpu_has_irq(vcpu, 0))
return 0;
if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul))
return 0;