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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reason, the existing function (with an outdated name) is replaced by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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2
arch/s390/kvm/kvm-s390.h
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@@ -228,7 +228,7 @@ int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
struct kvm_s390_irq *s390irq);
/* implemented in interrupt.c */
int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu);
int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
int psw_extint_disabled(struct kvm_vcpu *vcpu);
void kvm_s390_destroy_adapters(struct kvm *kvm);
int kvm_s390_si_ext_call_pending(struct kvm_vcpu *vcpu);