KVM: PPC: Book3S: Use correct page shift in H_STUFF_TCE

The other TCE handlers use page shift from the guest visible TCE table
(described by kvmppc_spapr_tce_iommu_table) so let's make H_STUFF_TCE
handlers do the same thing.

This should cause no behavioral change now but soon we will allow
the iommu_table::it_page_shift being different from from the emulated
table page size so this will play a role.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

arch/powerpc/kvm/book3s_64_vio.c

@@ -615,7 +615,7 @@ long kvmppc_h_stuff_tce(struct kvm_vcpu *vcpu,
 		return H_PARAMETER;
 
 	list_for_each_entry_lockless(stit, &stt->iommu_tables, next) {
-		unsigned long entry = ioba >> stit->tbl->it_page_shift;
+		unsigned long entry = ioba >> stt->page_shift;
 
 		for (i = 0; i < npages; ++i) {
 			ret = kvmppc_tce_iommu_unmap(vcpu->kvm,

arch/powerpc/kvm/book3s_64_vio_hv.c

@@ -526,7 +526,7 @@ long kvmppc_rm_h_stuff_tce(struct kvm_vcpu *vcpu,
 		return H_PARAMETER;
 
 	list_for_each_entry_lockless(stit, &stt->iommu_tables, next) {
-		unsigned long entry = ioba >> stit->tbl->it_page_shift;
+		unsigned long entry = ioba >> stt->page_shift;
 
 		for (i = 0; i < npages; ++i) {
 			ret = kvmppc_rm_tce_iommu_unmap(vcpu->kvm,