From: Yang Zhong <yang.zhong@intel.com>

Now that the ACPI builder methods are added, we can reach the ACPI
configuration pointer from the MachineState pointer. From there we can
get to the PCI host pointer and return it.

This makes the PCI host getter an ACPI, architecture agnostic function.

Signed-off-by: Yang Zhong <yang.zhong@intel.com>
---
 hw/acpi/aml-build.c | 20 +++++++-------------
 1 file changed, 7 insertions(+), 13 deletions(-)

diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index 33db1c1bc8..e8b087fcf5 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -22,6 +22,8 @@
 #include "qemu/osdep.h"
 #include <glib/gprintf.h>
 #include "hw/acpi/aml-build.h"
+#include "hw/acpi/builder.h"
+#include "hw/mem/memory-device.h"
 #include "qemu/bswap.h"
 #include "qemu/bitops.h"
 #include "sysemu/numa.h"
@@ -1617,23 +1619,15 @@ void acpi_build_tables_cleanup(AcpiBuildTables *tables, bool mfre)
     g_array_free(tables->vmgenid, mfre);
 }
 
-/*
- * Because of the PXB hosts we cannot simply query TYPE_PCI_HOST_BRIDGE.
- */
 Object *acpi_get_pci_host(void)
 {
-    PCIHostState *host;
+    MachineState *ms = MACHINE(qdev_get_machine());
+    AcpiBuilder *ab = ACPI_BUILDER(ms);
+    AcpiConfiguration *acpi_conf;
 
-    host = OBJECT_CHECK(PCIHostState,
-                        object_resolve_path("/machine/i440fx", NULL),
-                        TYPE_PCI_HOST_BRIDGE);
-    if (!host) {
-        host = OBJECT_CHECK(PCIHostState,
-                            object_resolve_path("/machine/q35", NULL),
-                            TYPE_PCI_HOST_BRIDGE);
-    }
+    acpi_conf = acpi_builder_configuration(ab);
 
-    return OBJECT(host);
+    return OBJECT(acpi_conf->pci_host);
 }
 
 
-- 
2.19.1