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d1ba364627
Add basic ACPI table information needed to understand the CXL driver probe process. Signed-off-by: Gregory Price <gourry@gourry.net> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Link: https://patch.msgid.link/20250512162134.3596150-6-gourry@gourry.net Signed-off-by: Dave Jiang <dave.jiang@intel.com>
29 lines
887 B
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29 lines
887 B
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.. SPDX-License-Identifier: GPL-2.0
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==============================================
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DSDT - Differentiated system Description Table
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==============================================
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This table describes what peripherals a machine has.
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This table's UIDs for CXL devices - specifically host bridges, must be
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consistent with the contents of the CEDT, otherwise the CXL driver will
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fail to probe correctly.
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Example Compute Express Link Host Bridge ::
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Scope (_SB)
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{
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Device (S0D0)
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{
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Name (_HID, "ACPI0016" /* Compute Express Link Host Bridge */) // _HID: Hardware ID
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Name (_CID, Package (0x02) // _CID: Compatible ID
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{
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EisaId ("PNP0A08") /* PCI Express Bus */,
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EisaId ("PNP0A03") /* PCI Bus */
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})
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...
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Name (_UID, 0x05) // _UID: Unique ID
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...
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}
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