ACRN v2.5.1 (Aug 2021)

We are pleased to announce an update release of the Project ACRN hypervisor version 2.5.1. This is a maintenance release based off the v2.5 branch that provides an update with a few bug fixes and support for Trusted Platform Module (TPM) 2.0.

There were no documentation changes in this update, so you can still refer to the v2.5-specific documentation found at

See the ACRN v2.5 (Jun 2021) release notes for information about the v2.5 release.

What’s New in v2.5.1

Trusted Platform Module (TPM) 2.0 support

ACRN hypervisor now supports pre-launched VM remote attestation use cases by passing the TPM 2.0 ACPI table provided by the BIOS to the pre-launched VM.

Fixed Issues Details

  • 6305 - Pre-launched Zephyr VM coud not get ACPI table

  • 6334 - Hypervisor console does not support 64-bit bar PCI UART with 32-bit bar space