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hw/acpi: add support for i440fx 'snooping' root busses 

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 <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Marcel Apfelbaum 2015-06-02 14:23:01 +03:00 committed by Michael S. Tsirkin
parent 09e5b81922
commit a4894206e3
1 changed files with 23 additions and 0 deletions
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23
hw/i386/acpi-build.c
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@ -626,6 +626,7 @@ 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();
@ -637,6 +638,28 @@ 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();