TCG ACPI Specification

Date Published: December, 01, 2014

The Trusted Computing Group (TCG) has announced the availability of a new version of the TCG ACPI Specification.

The TCG ACPI Specification covers interfaces to discover and interact with TPM devices according to the ACPI Standard. This version includes updates to support TPM 2.0 devices in PC Client and Server machines. With this updated specification manufacturers of ACPI compliant machines have a standardized way to express the availability of TPM 2.0 devices in their products. The specification also includes the definition of communication mechanism to interact with the TPM device.

Latest Revision:

Related Errata:

Previous Revisions:

Frequently Asked Questions:

Why was this update needed?

With the availability of TPM 2.0 devices it became necessary to update the definition of ACPI tables that describe the TPM device in the ACPI namespace.

What changed in the TCG ACPI Specification?

  • Added definition of the TPM2 ACPI table for TPM 2.0 devices.
  • Language between ACPI tables for TPM 1.2 and 2.0 was harmonized.
  • A TPM 2.0 specific ACPI method was introduced.

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