Re: [SeaBIOS] [Qemu-devel] [PATCH v5 for-2.3 21/28] hw/pci: inform bios if the system has more than one pci bridge

[Michael S. Tsirkin]

On Tue, Mar 10, 2015 at 05:32:07PM +0200, Marcel Apfelbaum wrote:
> From: Marcel Apfelbaum
>
> 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

Again it's not the right thing to do for extra root
complexes, only works for PXB.
> hw/i386/pc.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
>
> diff --git a/hw/i386/pc.c b/hw/i386/pc.c
> index ae3ef0a..71d2f5b 100644
> --- a/hw/i386/pc.c
> +++ b/hw/i386/pc.c
> @@ -1072,9 +1072,22 @@ typedef struct PcGuestInfoState {
>  static
>  void pc_guest_info_machine_done(Notifier *notifier, void *data)
>  {
> PCIHostState *host;
> int hosts = 0;
> PcGuestInfoState *guest_info_state = container_of(notifier,
>                                                   PcGuestInfoState,
>                                                   machine_done);
> HOST_BRIDGE_FOREACH(host) {
>    hosts++;
> }
> if (hosts && guest_info_state->info.fw_cfg) {
>    uint64_t *val = g_malloc(sizeof(*val));
>    *val = cpu_to_le64(hosts - 1);
>    fw_cfg_add_file(guest_info_state->info.fw_cfg,
>                    "etc/extra-pci-roots", val, sizeof(*val));
> }
> acpi_setup(&guest_info_state->info);
>
> }