1.. SPDX-License-Identifier: GPL-2.0 2 3============================================== 4DSDT - Differentiated system Description Table 5============================================== 6 7This table describes what peripherals a machine has. 8 9This table's UIDs for CXL devices - specifically host bridges, must be 10consistent with the contents of the CEDT, otherwise the CXL driver will 11fail to probe correctly. 12 13Example Compute Express Link Host Bridge :: 14 15 Scope (_SB) 16 { 17 Device (S0D0) 18 { 19 Name (_HID, "ACPI0016" /* Compute Express Link Host Bridge */) // _HID: Hardware ID 20 Name (_CID, Package (0x02) // _CID: Compatible ID 21 { 22 EisaId ("PNP0A08") /* PCI Express Bus */, 23 EisaId ("PNP0A03") /* PCI Bus */ 24 }) 25 ... 26 Name (_UID, 0x05) // _UID: Unique ID 27 ... 28 } 29