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KVM: s390: protvirt: do not inject interrupts after start

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As PSW restart is handled by the ultravisor (and we only get a start
notification) we must re-check the PSW after a start before injecting
interrupts.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
This commit is contained in:
Christian Borntraeger 2020-01-30 11:18:28 -05:00
parent 3adae0b4ca
commit 72f218208f
1 changed files with 7 additions and 0 deletions
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7
arch/s390/kvm/kvm-s390.c
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@ -4515,6 +4515,13 @@ int kvm_s390_vcpu_start(struct kvm_vcpu *vcpu)
}
kvm_s390_clear_cpuflags(vcpu, CPUSTAT_STOPPED);
/*
* The real PSW might have changed due to a RESTART interpreted by the
* ultravisor. We block all interrupts and let the next sie exit
* refresh our view.
*/
if (kvm_s390_pv_cpu_is_protected(vcpu))
vcpu->arch.sie_block->gpsw.mask &= ~PSW_INT_MASK;
/*
* Another VCPU might have used IBS while we were offline.
* Let's play safe and flush the VCPU at startup.