[PATCH 3.13 070/140] KVM: s390: fix diagnose code extraction

[Greg Kroah-Hartman]

3.13-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Heiko Carstens <heiko.carstens@xxxxxxxxxx>

commit 743db27c526e0f31cc507959d662e97e2048a86f upstream.

The diagnose code to be used is the contents of the base register (if not
zero), plus the displacement. The current code ignores the base register
contents. So let's fix that...

Reviewed-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Signed-off-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 arch/s390/kvm/diag.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/s390/kvm/diag.c
+++ b/arch/s390/kvm/diag.c
@@ -137,7 +137,7 @@ static int __diag_virtio_hypercall(struc
 
 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu)
 {
-	int code = (vcpu->arch.sie_block->ipb & 0xfff0000) >> 16;
+	int code = kvm_s390_get_base_disp_rs(vcpu) & 0xffff;
 
 	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
 		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);


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