KVM: PPC: Keep index within boundaries in kvmppc_44x_emul_tlbwe()

An index of KVM44x_GUEST_TLB_SIZE is already one too large.
Signed-off-by: NRoel Kluin <roel.kluin@gmail.com>
Acked-by: NHollis Blanchard <hollis@penguinppc.org>
Acked-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>

arch/powerpc/kvm/44x_tlb.c

@@ -440,7 +440,7 @@ int kvmppc_44x_emul_tlbwe(struct kvm_vcpu *vcpu, u8 ra, u8 rs, u8 ws)
 	unsigned int gtlb_index;
 
 	gtlb_index = kvmppc_get_gpr(vcpu, ra);
-	if (gtlb_index > KVM44x_GUEST_TLB_SIZE) {
+	if (gtlb_index >= KVM44x_GUEST_TLB_SIZE) {
 		printk("%s: index %d\n", __func__, gtlb_index);
 		kvmppc_dump_vcpu(vcpu);
 		return EMULATE_FAIL;