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KVM: s390: fix signal handling

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If signal pending is true we exit without updating kvm_run, userspace
currently just does nothing and jumps to kvm_run again.
Since we did not set an exit_reason we might end up with a random one
(whatever was the last exit). Therefore it was possible to e.g. jump to
the psw position the last real interruption set.
Setting the INTR exit reason ensures that no old psw data is swapped
in on reentry.

Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Christian Ehrhardt 2009-05-20 15:34:56 +02:00 committed by Avi Kivity
parent 9ace903d17
commit b1d16c495d
1 changed files with 3 additions and 1 deletions
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4
arch/s390/kvm/kvm-s390.c
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@ -527,8 +527,10 @@ rerun_vcpu:
if (rc == SIE_INTERCEPT_RERUNVCPU)
goto rerun_vcpu;
if (signal_pending(current) && !rc)
if (signal_pending(current) && !rc) {
kvm_run->exit_reason = KVM_EXIT_INTR;
rc = -EINTR;
}
if (rc == -ENOTSUPP) {
/* intercept cannot be handled in-kernel, prepare kvm-run */