diff options
| -rw-r--r-- | hw/pci/pci.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/hw/pci/pci.c b/hw/pci/pci.c index 1416ae2..8844251 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -46,6 +46,7 @@ #include "hw/pci/msix.h" #include "hw/hotplug.h" #include "hw/boards.h" +#include "hw/nvram/fw_cfg.h" #include "qapi/error.h" #include "qemu/cutils.h" #include "pci-internal.h" @@ -216,11 +217,41 @@ static uint16_t pcibus_numa_node(PCIBus *bus) return NUMA_NODE_UNASSIGNED; } +static GByteArray *pci_bus_fw_cfg_gen_data(Object *obj, Error **errp) +{ + PCIBus *bus = PCI_BUS(obj); + GByteArray *byte_array; + uint64_t extra_hosts = 0; + + if (!bus) { + return NULL; + } + + QLIST_FOREACH(bus, &bus->child, sibling) { + /* look for expander root buses */ + if (pci_bus_is_root(bus)) { + extra_hosts++; + } + } + + if (!extra_hosts) { + return NULL; + } + extra_hosts = cpu_to_le64(extra_hosts); + + byte_array = g_byte_array_new(); + g_byte_array_append(byte_array, + (const void *)&extra_hosts, sizeof(extra_hosts)); + + return byte_array; +} + static void pci_bus_class_init(ObjectClass *klass, void *data) { BusClass *k = BUS_CLASS(klass); PCIBusClass *pbc = PCI_BUS_CLASS(klass); ResettableClass *rc = RESETTABLE_CLASS(klass); + FWCfgDataGeneratorClass *fwgc = FW_CFG_DATA_GENERATOR_CLASS(klass); k->print_dev = pcibus_dev_print; k->get_dev_path = pcibus_get_dev_path; @@ -232,6 +263,8 @@ static void pci_bus_class_init(ObjectClass *klass, void *data) pbc->bus_num = pcibus_num; pbc->numa_node = pcibus_numa_node; + + fwgc->get_data = pci_bus_fw_cfg_gen_data; } static const TypeInfo pci_bus_info = { @@ -240,6 +273,10 @@ static const TypeInfo pci_bus_info = { .instance_size = sizeof(PCIBus), .class_size = sizeof(PCIBusClass), .class_init = pci_bus_class_init, + .interfaces = (InterfaceInfo[]) { + { TYPE_FW_CFG_DATA_GENERATOR_INTERFACE }, + { } + } }; static const TypeInfo cxl_interface_info = { |