1 files changed, 51 insertions, 0 deletions
diff --git a/arch/x86/pci/init.c b/arch/x86/pci/init.c
new file mode 100644
index 000000000..0bb3b8b44
--- /dev/null
+++ b/arch/x86/pci/init.c
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <asm/pci_x86.h>
+#include <asm/x86_init.h>
+#include <asm/irqdomain.h>
+
+/* arch_initcall has too random ordering, so call the initializers
+   in the right sequence from here. */
+static __init int pci_arch_init(void)
+{
+	int type, pcbios = 1;
+
+	type = pci_direct_probe();
+
+	if (!(pci_probe & PCI_PROBE_NOEARLY))
+		pci_mmcfg_early_init();
+
+	if (x86_init.pci.arch_init)
+		pcbios = x86_init.pci.arch_init();
+
+	/*
+	 * Must happen after x86_init.pci.arch_init(). Xen sets up the
+	 * x86_init.irqs.create_pci_msi_domain there.
+	 */
+	x86_create_pci_msi_domain();
+
+	if (!pcbios)
+		return 0;
+
+	pci_pcbios_init();
+
+	/*
+	 * don't check for raw_pci_ops here because we want pcbios as last
+	 * fallback, yet it's needed to run first to set pcibios_last_bus
+	 * in case legacy PCI probing is used. otherwise detecting peer busses
+	 * fails.
+	 */
+	pci_direct_init(type);
+
+	if (!raw_pci_ops && !raw_pci_ext_ops)
+		printk(KERN_ERR
+		"PCI: Fatal: No config space access function found\n");
+
+	dmi_check_pciprobe();
+
+	dmi_check_skip_isa_align();
+
+	return 0;
+}
+arch_initcall(pci_arch_init);