@@ -75,6 +75,8 @@ static Property pci_props[] = {
QEMU_PCIE_LNKSTA_DLLLA_BITNR, true),
DEFINE_PROP_BIT("x-pcie-extcap-init", PCIDevice, cap_present,
QEMU_PCIE_EXTCAP_INIT_BITNR, true),
+ DEFINE_PROP_STRING("failover_pair_id", PCIDevice,
+ failover_pair_id),
DEFINE_PROP_END_OF_LIST()
};
@@ -2077,6 +2079,7 @@ static void pci_qdev_realize(DeviceState *qdev, Error **errp)
ObjectClass *klass = OBJECT_CLASS(pc);
Error *local_err = NULL;
bool is_default_rom;
+ uint16_t class_id;
/* initialize cap_present for pci_is_express() and pci_config_size(),
* Note that hybrid PCIs are not set automatically and need to manage
@@ -2101,6 +2104,34 @@ static void pci_qdev_realize(DeviceState *qdev, Error **errp)
}
}
+ if (pci_dev->failover_pair_id) {
+ if (!pci_bus_is_express(pci_get_bus(pci_dev))) {
+ error_setg(errp, "failover primary device must be on "
+ "PCIExpress bus");
+ error_propagate(errp, local_err);
+ pci_qdev_unrealize(DEVICE(pci_dev), NULL);
+ return;
+ }
+ class_id = pci_get_word(pci_dev->config + PCI_CLASS_DEVICE);
+ if (class_id != PCI_CLASS_NETWORK_ETHERNET) {
+ error_setg(errp, "failover primary device is not an "
+ "Ethernet device");
+ error_propagate(errp, local_err);
+ pci_qdev_unrealize(DEVICE(pci_dev), NULL);
+ return;
+ }
+ if (!(pci_dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION)
+ && (PCI_FUNC(pci_dev->devfn) == 0)) {
+ qdev->allow_unplug_during_migration = true;
+ } else {
+ error_setg(errp, "failover: primary device must be in its own "
+ "PCI slot");
+ error_propagate(errp, local_err);
+ pci_qdev_unrealize(DEVICE(pci_dev), NULL);
+ return;
+ }
+ }
+
/* rom loading */
is_default_rom = false;
if (pci_dev->romfile == NULL && pc->romfile != NULL) {
@@ -352,6 +352,9 @@ struct PCIDevice {
MSIVectorUseNotifier msix_vector_use_notifier;
MSIVectorReleaseNotifier msix_vector_release_notifier;
MSIVectorPollNotifier msix_vector_poll_notifier;
+
+ /* ID of standby device in net_failover pair */
+ char *failover_pair_id;
};
void pci_register_bar(PCIDevice *pci_dev, int region_num,