From 3eb77d5116d78cce5b9fa9eb19d012bc636116b6 Mon Sep 17 00:00:00 2001 From: Christian Borntraeger Date: Mon, 17 Nov 2008 14:50:35 +0100 Subject: 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 Signed-off-by: Avi Kivity --- arch/s390/kvm/sigp.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/s390/kvm/sigp.c b/arch/s390/kvm/sigp.c index 1703926..2a01b9e 100644 --- a/arch/s390/kvm/sigp.c +++ b/arch/s390/kvm/sigp.c @@ -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]; -- cgit v1.1