Commit e663df91 authored Jun 06, 2019 by Janosch Frank Committed by Christian Borntraeger Feb 27, 2020

KVM: s390: protvirt: Handle spec exception loops



SIE intercept code 8 is used only on exception loops for protected
guests. That means we need to stop the guest when we see it. This is
done by userspace.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: David Hildenbrand <david@redhat.com>
[borntraeger@de.ibm.com: patch merging, splitting, fixing]
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

parent 0890ddea

arch/s390/kvm/intercept.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -231,6 +231,13 @@ static int handle_prog(struct kvm_vcpu *vcpu)

		vcpu->stat.exit_program_interruption++;

		/*
		* Intercept 8 indicates a loop of specification exceptions
		* for protected guests.
		*/
		if (kvm_s390_pv_cpu_is_protected(vcpu))
		return -EOPNOTSUPP;

		if (guestdbg_enabled(vcpu) && per_event(vcpu)) {
		rc = kvm_s390_handle_per_event(vcpu);
		if (rc)

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