| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #define ROOT_BRIDGE(acpi_name) \ |
| Device(acpi_name) { \ |
| Name(_HID, EISAID("PNP0A08")) /* PCI Express Root Bridge */ \ |
| Name(_CID, EISAID("PNP0A03")) /* PCI Root Bridge */ \ |
| Method (_OSC, 4, NotSerialized) { \ |
| /* Check for proper PCI/PCIe UUID */ \ |
| If (Arg0 == ToUUID("33DB4D5B-1FF7-401C-9657-7441C03DD766")) \ |
| { \ |
| /* Let OS control everything */ \ |
| Return(Arg3) \ |
| } Else { \ |
| CreateDWordField(Arg3, 0, CDW1) \ |
| CDW1 = CDW1 | 4 /* Unrecognized UUID, so set bit 2 to 1 */ \ |
| Return(Arg3) \ |
| } \ |
| } \ |
| } |