diff options
| -rw-r--r-- | hw/ppc/spapr_pci.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c index 2a6a48744a..21681215d4 100644 --- a/hw/ppc/spapr_pci.c +++ b/hw/ppc/spapr_pci.c @@ -1480,6 +1480,57 @@ static void spapr_pci_bridge_plug(SpaprPhbState *phb, add_drcs(phb, bus); } +/* Returns non-zero if the value of "chassis_nr" is already in use */ +static int check_chassis_nr(Object *obj, void *opaque) +{ + int new_chassis_nr = + object_property_get_uint(opaque, "chassis_nr", &error_abort); + int chassis_nr = + object_property_get_uint(obj, "chassis_nr", NULL); + + if (!object_dynamic_cast(obj, TYPE_PCI_BRIDGE)) { + return 0; + } + + /* Skip unsupported bridge types */ + if (!chassis_nr) { + return 0; + } + + /* Skip self */ + if (obj == opaque) { + return 0; + } + + return chassis_nr == new_chassis_nr; +} + +static bool bridge_has_valid_chassis_nr(Object *bridge, Error **errp) +{ + int chassis_nr = + object_property_get_uint(bridge, "chassis_nr", NULL); + + /* + * slotid_cap_init() already ensures that "chassis_nr" isn't null for + * standard PCI bridges, so this really tells if "chassis_nr" is present + * or not. + */ + if (!chassis_nr) { + error_setg(errp, "PCI Bridge lacks a \"chassis_nr\" property"); + error_append_hint(errp, "Try -device pci-bridge instead.\n"); + return false; + } + + /* We want unique values for "chassis_nr" */ + if (object_child_foreach_recursive(object_get_root(), check_chassis_nr, + bridge)) { + error_setg(errp, "Bridge chassis %d already in use", chassis_nr); + return false; + } + + return true; +} + static void spapr_pci_plug(HotplugHandler *plug_handler, DeviceState *plugged_dev, Error **errp) { @@ -1508,6 +1559,9 @@ static void spapr_pci_plug(HotplugHandler *plug_handler, g_assert(drc); if (pc->is_bridge) { + if (!bridge_has_valid_chassis_nr(OBJECT(plugged_dev), errp)) { + return; + } spapr_pci_bridge_plug(phb, PCI_BRIDGE(plugged_dev)); } |