If the machine has extra root busses that are snooping to
the i440fx host bridge, we need to add them to
acpi in order to be properly detected by guests.
Signed-off-by: Marcel Apfelbaum <mar...@redhat.com>
---
hw/i386/acpi-build.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 166a02f..4bbac77 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -624,6 +624,7 @@ build_ssdt(GArray *table_data, GArray *linker,
uint32_t nr_mem = machine->ram_slots;
unsigned acpi_cpus = guest_info->apic_id_limit;
Aml *ssdt, *sb_scope, *scope, *pkg, *dev, *method, *crs, *field, *ifctx;
+ PCIBus *bus = NULL;
int i;
ssdt = init_aml_allocator();
@@ -635,6 +636,28 @@ build_ssdt(GArray *table_data, GArray *linker,
/* Reserve space for header */
acpi_data_push(ssdt->buf, sizeof(AcpiTableHeader));
+ /* Extra PCI root buses are implemented only for i440fx */
+ bus = find_i440fx();
+ if (bus) {
+ QLIST_FOREACH(bus, &bus->child, sibling) {
+ uint8_t bus_num = pci_bus_num(bus);
+
+ /* look only for expander root buses */
+ if (!pci_bus_is_root(bus)) {
+ continue;
+ }
+
+ scope = aml_scope("\\_SB");
+ dev = aml_device("PC%.02X", bus_num);
+ aml_append(dev,
+ aml_name_decl("_UID", aml_string("PC%.02X", bus_num)));
+ aml_append(dev, aml_name_decl("_HID", aml_string("PNP0A03")));
+ aml_append(dev, aml_name_decl("_BBN", aml_int(bus_num)));
+ aml_append(scope, dev);
+ aml_append(ssdt, scope);
+ }
+ }
+
scope = aml_scope("\\_SB.PCI0");
/* build PCI0._CRS */
crs = aml_resource_template();
--
2.1.0
