1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/pci.h> 3 #include <linux/init.h> 4 #include <asm/pci_x86.h> 5 #include <asm/x86_init.h> 6 #include <asm/irqdomain.h> 7 8 /* arch_initcall has too random ordering, so call the initializers 9 in the right sequence from here. */ 10 static __init int pci_arch_init(void) 11 { 12 int type, pcbios = 1; 13 14 type = pci_direct_probe(); 15 16 if (!(pci_probe & PCI_PROBE_NOEARLY)) 17 pci_mmcfg_early_init(); 18 19 if (x86_init.pci.arch_init) 20 pcbios = x86_init.pci.arch_init(); 21 22 /* 23 * Must happen after x86_init.pci.arch_init(). Xen sets up the 24 * x86_init.irqs.create_pci_msi_domain there. 25 */ 26 x86_create_pci_msi_domain(); 27 28 if (!pcbios) 29 return 0; 30 31 pci_pcbios_init(); 32 33 /* 34 * don't check for raw_pci_ops here because we want pcbios as last 35 * fallback, yet it's needed to run first to set pcibios_last_bus 36 * in case legacy PCI probing is used. otherwise detecting peer busses 37 * fails. 38 */ 39 pci_direct_init(type); 40 41 if (!raw_pci_ops && !raw_pci_ext_ops) 42 printk(KERN_ERR 43 "PCI: Fatal: No config space access function found\n"); 44 45 dmi_check_pciprobe(); 46 47 dmi_check_skip_isa_align(); 48 49 return 0; 50 } 51 arch_initcall(pci_arch_init); 52