Commit 3eb77d51 authored Nov 17, 2008 by Christian Borntraeger Committed by Avi Kivity Nov 23, 2008

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>

parent ed313489

arch/s390/kvm/sigp.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -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];