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KVM: s390: Fix problem state handling in guest sigp handler 

We can get an exit for instructions starting with 0xae, even if the guest is
in userspace. Lets make sure, that the signal processor handler is only called
in guest supervisor mode. Otherwise, send a program check.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Christian Borntraeger 2008-11-17 14:50:35 +01:00 committed by Avi Kivity
parent ed313489ba
commit 3eb77d5116
1 changed files with 5 additions and 0 deletions
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5
arch/s390/kvm/sigp.c
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@ -237,6 +237,11 @@ int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu)
u8 order_code;
int rc;
/* sigp in userspace can exit */
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
return kvm_s390_inject_program_int(vcpu,
PGM_PRIVILEGED_OPERATION);
order_code = disp2;
if (base2)
order_code += vcpu->arch.guest_gprs[base2];