|  | pci_ss = ss.source_set() | 
|  | pci_ss.add(files( | 
|  | 'msi.c', | 
|  | 'msix.c', | 
|  | 'pci.c', | 
|  | 'pci_bridge.c', | 
|  | 'pci_host.c', | 
|  | 'pci-hmp-cmds.c', | 
|  | 'pci-qmp-cmds.c', | 
|  | 'pcie_sriov.c', | 
|  | 'shpc.c', | 
|  | 'slotid_cap.c' | 
|  | )) | 
|  | # The functions in these modules can be used by devices too.  Since we | 
|  | # allow plugging PCIe devices into PCI buses, include them even if | 
|  | # CONFIG_PCI_EXPRESS=n. | 
|  | pci_ss.add(files('pcie.c', 'pcie_aer.c')) | 
|  | pci_ss.add(files('pcie_doe.c')) | 
|  | system_ss.add(when: 'CONFIG_PCI_EXPRESS', if_true: files('pcie_port.c', 'pcie_host.c')) | 
|  | system_ss.add_all(when: 'CONFIG_PCI', if_true: pci_ss) | 
|  |  | 
|  | system_ss.add(when: 'CONFIG_PCI', if_false: files('pci-stub.c')) |