Commit a4894206 authored by Marcel Apfelbaum's avatar Marcel Apfelbaum Committed by Michael S. Tsirkin
Browse files

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: default avatarMarcel Apfelbaum <marcel@redhat.com>
Reviewed-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Acked-by: default avatarLaszlo Ersek <lersek@redhat.com>
parent 09e5b819

hw/i386/acpi-build.c

+23 −0
Original line number Diff line number Diff line
@@ -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();