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TianoCore EDK II

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TianoCore EDK II (formerly Tiano) is the reference implementation of UEFI by Intel. EDK is the abbreviation for EFI Development Kit and is developed by the TianoCore community.[1] TianoCore EDK II is the de facto standard generic UEFI services implementation.[2]



In 2004, Intel released their "Foundation Code" of their EFI implementation using a free license.[1] The resulting code formed the basis of the community-run EDK project on SourceForge, started in 2004. The name "Tiano" was present in the initial Intel code.[3] The last update to the EDK (version 1) project happened in May 2010.[4] Version 2 is in active development.[5][non-primary source needed]

An "edk2" project was imported into SourceForge in April 2006, with a package-oriented code base again written by Intel. The initial "DeveloperManual" referred to this project as "Tiano R9".[6] In 2008, a stable, validated version of EDK II was tagged as "UEFI Development Kit 2008" (UDK2008). The tag includes a BuildNotes.txt dating to November 2006 describing the code found in the initial import, and a BuildNotes2.txt describing modules added in May 2008.[7] UDK2010 was the first version of EDK II to be widely known.[8] Intel would continue to validate certain snapshots of EDK II as UDK until 2018, when EDK II moved into a "stable tag" format.[9]

Although EDK II implements the UEFI specification, it is not endorsed by the UEFI Forum.[1]


UEFI shell 2.2, a part of TianoCore EDK II

EDK II code has been integrated into other projects.

A part of TianoCore is the UEFI shell. When a specific UEFI vendor does not provide a UEFI shell, the one from TianoCore can be used.[10]



Google uses a version of coreboot modified to launch Tiano. This feature is called PIANO (payload into Tiano) or tianocoreboot. PIANO code was merged into coreboot in 2013.[11] The code was updated to be compatible with EDK II in 2017.[12]

EDK2 source code includes instructions for building as a payload for coreboot or Intel's "slim bootloader".[13]

Project Mu


Project Mu is a fork of EDK-II by Microsoft.[14][15] It is an open source release of the UEFI core used in Microsoft Surface and Hyper-V products initiated by Microsoft in December 2018.[16] The project promotes the idea of Firmware as a Service.[17] The project was started to replace TianoCore's edk2 implementation to improve quality tests of the competing open source UEFI core.[18]



EFIDroid is a bootloader for Android devices based on Snapdragon processors that is based on EDK-II.[19]

LogoFAIL vulnerability


In December 2023 a vulnerability termed "LogoFAIL" was discovered associated with EDK II which enabled an attacker to insert their own code in place of custom boot logo bitmap loader modules.[20]


  1. ^ a b c "What is TianoCore?". www.tianocore.org. Retrieved 2021-03-26.
  2. ^ Häuser, Marvin; Cheptsov, Vitaly (2020). "Securing the EDK II Image Loader". 2020 Ivannikov Ispras Open Conference (ISPRAS). pp. 16–25. arXiv:2012.05471. doi:10.1109/ISPRAS51486.2020.00010. ISBN 978-1-6654-1291-9. S2CID 228084173.
  3. ^ "tianocore/edk". tianocore. 9 March 2023.
  4. ^ "Commits · tianocore/edk". GitHub.
  5. ^ "Releases · tianocore/edk2". GitHub. Retrieved 2024-02-23.
  6. ^ "EDK II / Code / [r29574] /tags/InitialImport". sourceforge.net.
  7. ^ "EDK II Project". tianocore. 18 May 2023.
  8. ^ Barry, Peter (2012). Modern embedded computing : designing connected, pervasive, media-rich systems. Patrick Crowley. Amsterdam: Elsevier/Morgan Kaufmann. p. 173. ISBN 978-0-12-394407-8. OCLC 778434967.
  9. ^ "UDK". tianocore documentation (GitHub).
  10. ^ Babar, Yogesh (2020). Hands-on booting learn the boot process of Linux, Windows, and Unix. Berkeley, CA: Apress L. P. p. 119. ISBN 978-1-4842-5890-3. OCLC 1164505064.
  11. ^ "Google Pushes "Project PIANO" Into Coreboot - Phoronix". www.phoronix.com. Retrieved 2021-03-26.
  12. ^ "Coreboot Now Has Basic UEFI Support Working With TianoCore - Phoronix". www.phoronix.com. Retrieved 2021-03-26.
  13. ^ "EDK II Project: BuildAndIntegrationInstructions.txt". GitHub. tianocore. 18 May 2023.
  14. ^ "Microsoft releases Mu open-source UEFI firmware | bit-tech.net". Bit-tech. Retrieved 2021-03-26.
  15. ^ "Microsoft Announces "Project Mu" For Open-Source UEFI Alternative To TianoCore - Phoronix". www.phoronix.com. Retrieved 2021-03-26.
  16. ^ Microsoft Announces "Project Mu" For Open-Source UEFI Alternative To TianoCore - Phoronix
  17. ^ "Microsoft announces Project Mu, an open-source release of the UEFI core". 20 December 2018.
  18. ^ "Microsoft announces Project Mu to promote Firmware as a Service". 16 June 2023.
  19. ^ "EFIDroid: A Second-Stage Bootloader Using UEFI Firmware to Multiboot [XDA Spotlight]". xda-developers. 2017-03-06. Retrieved 2021-03-26.
  20. ^ "The Far-Reaching Consequences of LogoFAIL". Binarly. November 29, 2023.