leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

KVM: s390: protvirt: Handle spec exception loops

Browse Source 
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>
This commit is contained in:
Janosch Frank
2019-06-06 10:09:15 +02:00
committed by Christian Borntraeger
parent 0890ddea1a
commit e663df91dd
1 changed files with 7 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
arch/s390/kvm/intercept.c
View File

@@ -231,6 +231,13 @@ static int handle_prog(struct kvm_vcpu *vcpu)
vcpu->stat.exit_program_interruption++; 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)) { if (guestdbg_enabled(vcpu) && per_event(vcpu)) {
rc = kvm_s390_handle_per_event(vcpu); rc = kvm_s390_handle_per_event(vcpu);
if (rc) if (rc)