Documentation/driver-api/cxl/platform/acpi/dsdt.rst

Source file repositories/reference/linux-study-clean/Documentation/driver-api/cxl/platform/acpi/dsdt.rst

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Linux kernel
Corpus path
Documentation/driver-api/cxl/platform/acpi/dsdt.rst
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.rst
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887 bytes
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29
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: documentation
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atlas-only

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Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

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Annotated Snippet

.. SPDX-License-Identifier: GPL-2.0

==============================================
DSDT - Differentiated system Description Table
==============================================

This table describes what peripherals a machine has.

This table's UIDs for CXL devices - specifically host bridges, must be
consistent with the contents of the CEDT, otherwise the CXL driver will
fail to probe correctly.

Example Compute Express Link Host Bridge ::

    Scope (_SB)
    {
        Device (S0D0)
        {
            Name (_HID, "ACPI0016" /* Compute Express Link Host Bridge */)  // _HID: Hardware ID
            Name (_CID, Package (0x02)  // _CID: Compatible ID
            {
                EisaId ("PNP0A08") /* PCI Express Bus */,
                EisaId ("PNP0A03") /* PCI Bus */
            })
            ...
            Name (_UID, 0x05)  // _UID: Unique ID
            ...
      }

Annotation

Implementation Notes