[PATCH 4/5] hw/pci-host/prep: Do not directly map bus-master region onto main bus

["Philippe Mathieu-Daudé" <f4bug@amsat.org>]

The raven bus-master memory region is exposed as an AddressSpace.
AddressSpaces root MemoryRegion must not be mapped into other
MemoryRegion, therefore map the region using its alias.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/pci-host/prep.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/hw/pci-host/prep.c b/hw/pci-host/prep.c
index 00a28c2d18c..6eaf9242bd8 100644
--- a/hw/pci-host/prep.c
+++ b/hw/pci-host/prep.c
@@ -295,8 +295,6 @@ static void raven_pcihost_initfn(Object *obj)
     memory_region_add_subregion(address_space_mem, 0x80000000,
                                 &s->pci_io_non_contiguous);
     memory_region_add_subregion(address_space_mem, 0xc0000000, &s->pci_memory);
-    pci_root_bus_new_inplace(&s->pci_bus, sizeof(s->pci_bus), DEVICE(obj), NULL,
-                             &s->pci_memory, &s->pci_io, 0, TYPE_PCI_BUS);
 
     /* Bus master address space */
     memory_region_init(&s->bm, obj, "bm-raven", 4 * GiB);
@@ -308,6 +306,10 @@ static void raven_pcihost_initfn(Object *obj)
     memory_region_add_subregion(&s->bm, 0         , &s->bm_pci_memory_alias);
     memory_region_add_subregion(&s->bm, 0x80000000, &s->bm_ram_alias);
     address_space_init(&s->bm_as, &s->bm, "raven-bm");
+
+    pci_root_bus_new_inplace(&s->pci_bus, sizeof(s->pci_bus), DEVICE(obj), NULL,
+                             &s->bm_pci_memory_alias, &s->pci_io, 0,
+                             TYPE_PCI_BUS);
     pci_setup_iommu(&s->pci_bus, raven_pcihost_set_iommu, s);
 
     h->bus = &s->pci_bus;
-- 
2.26.2