spapr_vio: Introduce a liobn number generating macros

This introduces a macro which makes up a LIOBN from fixed prefix and
VIO device address (@reg property).

This is to keep LIOBN macros rendering consistent - the same macro for
PCI has been added by the previous patch.
Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: NAlexander Graf <agraf@suse.de>

hw/ppc/spapr_vio.c

@@ -469,7 +469,7 @@ static void spapr_vio_busdev_realize(DeviceState *qdev, Error **errp)
     }
 
     if (pc->rtce_window_size) {
-        uint32_t liobn = SPAPR_VIO_BASE_LIOBN | dev->reg;
+        uint32_t liobn = SPAPR_VIO_LIOBN(dev->reg);
 
         memory_region_init(&dev->mrroot, OBJECT(dev), "iommu-spapr-root",
                            ram_size);

include/hw/ppc/spapr.h

@@ -482,6 +482,7 @@ int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr,
 #define SPAPR_TCE_PAGE_MASK    (SPAPR_TCE_PAGE_SIZE - 1)
 
 #define SPAPR_VIO_BASE_LIOBN    0x00000000
+#define SPAPR_VIO_LIOBN(reg)    (0x00000000 | (reg))
 #define SPAPR_PCI_LIOBN(phb_index, window_num) \
     (0x80000000 | ((phb_index) << 8) | (window_num))
 #define SPAPR_PCI_DMA_WINDOW_NUM(liobn) ((liobn) & 0xff)