Commit 2118196b authored by Marcel Apfelbaum's avatar Marcel Apfelbaum Committed by Michael S. Tsirkin
Browse files

hw/pci: inform bios if the system has extra pci root buses 



The bios looks for 'etc/extra-pci-roots' to decide if
is going to scan further buses after bus 0 tree.

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 40d14bef

hw/i386/pc.c

+20 −0
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ 
#include "hw/block/fdc.h"

#include "hw/ide.h"

#include "hw/pci/pci.h"

#include "hw/pci/pci_bus.h"

#include "monitor/monitor.h"

#include "hw/nvram/fw_cfg.h"

#include "hw/timer/hpet.h"
@@ -1119,6 +1120,25 @@ void pc_guest_info_machine_done(Notifier *notifier, void *data) 
    PcGuestInfoState *guest_info_state = container_of(notifier,

                                                      PcGuestInfoState,

                                                      machine_done);

    PCIBus *bus = find_i440fx();



    if (bus) {

        int extra_hosts = 0;



        QLIST_FOREACH(bus, &bus->child, sibling) {

            /* look for expander root buses */

            if (pci_bus_is_root(bus)) {

                extra_hosts++;

            }

        }

        if (extra_hosts && guest_info_state->info.fw_cfg) {

            uint64_t *val = g_malloc(sizeof(*val));

            *val = cpu_to_le64(extra_hosts);

            fw_cfg_add_file(guest_info_state->info.fw_cfg,

                    "etc/extra-pci-roots", val, sizeof(*val));

        }

    }



    acpi_setup(&guest_info_state->info);

}