From 2118196bb3795a43bf708c37bdcf4b3c33778ccb Mon Sep 17 00:00:00 2001 From: Marcel Apfelbaum Date: Tue, 2 Jun 2015 14:23:07 +0300 Subject: 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: Marcel Apfelbaum Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin Acked-by: Laszlo Ersek --- hw/i386/pc.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/hw/i386/pc.c b/hw/i386/pc.c index 1eb1db0..a93972f 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -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); } -- cgit v1.1