Welcome!

Open Source Cloud Authors: Pat Romanski, Liz McMillan, Yeshim Deniz, Zakia Bouachraoui, Elizabeth White

News Feed Item

UEFI Forum’s New ACPI 5.1 Specification Adapts Configuration and Power Interface to 64-Bit Focused Features of the ARMv8-A Architectures

The Unified Extensible Firmware Interface (UEFI) Forum, a nonprofit industry standards body that promotes firmware innovations, today announced the publication of the Advanced Configuration and Power Interface (ACPI) Specification Version 5.1. This specification provides the interfaces needed to support the ARMv8-architecture in ACPI. It also maps out new features that are common to all supported platforms. These latest expansions further the UEFI Forum’s mission to ensure that the ACPI remains applicable to all systems and devices.

Also announced today is the availability of the ACPI Specification Version 5.0, Errata B. This document fixes minor errors and information gaps identified in the ACPI v5.0. Systems that have already been developed to comply with this version of the ACPI specification will benefit from these errata.

New Features, New Architectures: The ACPI 5.1 Specification

The ACPI is a robust interface between firmware, operating systems (OSes) and devices that provides management of hardware functions at runtime. The core ACPI-configurable functions include device discovery, thermal management, general UEFI boot capability, OS configuration and power management (OPSM) and reliability, availability and supportability (RAS) features. Use of the ACPI improves system power distribution and conservation.

The ACPI 5.1 specification is the first major document released by the UEFI Forum’s ACPI Specification Working Group (ASWG)—the committee responsible for the open standard since its October 2013 move under the Forum’s umbrella. In addition to extending the above-mentioned core ACPI functions to ARMv8-A architectures, the 5.1 specification introduces the following ARM 64-bit-focused features:

  • Expanded Generic Interrupt Controller (GIC) Support: Extends ACPI support to include GICv2 virtualization, GIC v2m and parts of GICv3.
  • Power State Coordination Interface (PSCI) Support: Allows PSCI discoverability via ARM Boot Flags filed in the Fixed ACPI Description Table (FADT).
  • Always-On Timers and Watchdog: Ensures system memory mapped timers are compliant with ARMv7 and ARMv8 generic timer architecture.

“UEFI and ACPI are the prevalent open standards enabling flexible device configuration and power-state management in server class systems,” said Lakshmi Mandyam, director of server systems and ecosystems, ARM. “The ARMv8 server ecosystem is aligning around open industry standards with UEFI emerging as the boot model and ACPI as the runtime interfaces.”

New or enhanced features included in the 5.1 specification that benefit all ACPI-supported architectures include:

  • Device-Specific Data (_DSD) Control: Reports device registry address location, generic clock controls and other critical properties to Linux OS-level drivers, allowing them to operate within the reported parameters.
  • Collaborative Processor Performance Control (CPPC) extension: support platform-based, fully autonomous selection of performance states with OSPM providing information that guides the selection.

Additionally, the UEFI Forum is now responsible for assigning the Plug-and-Play (PNP) Identifiers and the ACPI Identifiers to avoid namespace collision.

“We kicked off ASWG in January. It is now the biggest Working Group in the UEFI Forum, with active participation from both x64 and ARM ecosystems, as well as the Windows and Linux communities,” said Dong Wei, UEFI Forum vice president and ASWG co-chair. “We worked together to update the ACPI Spec in record time—just over six months. With the latest ACPI v5.1 and UEFI v2.4, the industry has the opportunity to bring to market products based on converged platform infrastructure for interoperability while gaining more flexibility for innovations. Having this capability for both x64 and ARM architectures is a milestone achievement.”

To view all published ACPI specification versions and errata, visit www.uefi.org/acpi/specs.

ACPI at LinuxCon and CloudOpen North America 2014

Learn more about the ACPI 5.1 specification support for ARM by joining the UEFI Mini-Summit at LinuxCon and CloudOpen North America. All conference registrants are welcome to attend the session on “Building ARM Servers with UEFI and ACPI” at 3:30 p.m. on Friday, August 22. Click here to register.

About The UEFI Forum

The Unified Extensible Firmware Interface (UEFI) Forum is a world-class non-profit industry standards body that works in partnership to enable the evolution of platform technologies. The UEFI Forum champions firmware innovation through industry collaboration and the advocacy of a standardized interface that simplifies and secures platform initialization and firmware bootstrap operations. Both developed and supported by representatives from industry-leading technology companies, UEFI specifications promote business and technological efficiency, improve performance and security, facilitate interoperability between devices, platforms and systems, and comply with next-generation technologies. To learn more about the UEFI Forum, visit www.uefi.org.

More Stories By Business Wire

Copyright © 2009 Business Wire. All rights reserved. Republication or redistribution of Business Wire content is expressly prohibited without the prior written consent of Business Wire. Business Wire shall not be liable for any errors or delays in the content, or for any actions taken in reliance thereon.

IoT & Smart Cities Stories
Bill Schmarzo, Tech Chair of "Big Data | Analytics" of upcoming CloudEXPO | DXWorldEXPO New York (November 12-13, 2018, New York City) today announced the outline and schedule of the track. "The track has been designed in experience/degree order," said Schmarzo. "So, that folks who attend the entire track can leave the conference with some of the skills necessary to get their work done when they get back to their offices. It actually ties back to some work that I'm doing at the University of San...
Andrew Keys is Co-Founder of ConsenSys Enterprise. He comes to ConsenSys Enterprise with capital markets, technology and entrepreneurial experience. Previously, he worked for UBS investment bank in equities analysis. Later, he was responsible for the creation and distribution of life settlement products to hedge funds and investment banks. After, he co-founded a revenue cycle management company where he learned about Bitcoin and eventually Ethereal. Andrew's role at ConsenSys Enterprise is a mul...
IoT is rapidly becoming mainstream as more and more investments are made into the platforms and technology. As this movement continues to expand and gain momentum it creates a massive wall of noise that can be difficult to sift through. Unfortunately, this inevitably makes IoT less approachable for people to get started with and can hamper efforts to integrate this key technology into your own portfolio. There are so many connected products already in place today with many hundreds more on the h...
DXWorldEXPO | CloudEXPO are the world's most influential, independent events where Cloud Computing was coined and where technology buyers and vendors meet to experience and discuss the big picture of Digital Transformation and all of the strategies, tactics, and tools they need to realize their goals. Sponsors of DXWorldEXPO | CloudEXPO benefit from unmatched branding, profile building and lead generation opportunities.
DXWorldEXPO LLC announced today that Telecom Reseller has been named "Media Sponsor" of CloudEXPO | DXWorldEXPO 2018 New York, which will take place on November 11-13, 2018 in New York City, NY. Telecom Reseller reports on Unified Communications, UCaaS, BPaaS for enterprise and SMBs. They report extensively on both customer premises based solutions such as IP-PBX as well as cloud based and hosted platforms.
In his keynote at 19th Cloud Expo, Sheng Liang, co-founder and CEO of Rancher Labs, discussed the technological advances and new business opportunities created by the rapid adoption of containers. With the success of Amazon Web Services (AWS) and various open source technologies used to build private clouds, cloud computing has become an essential component of IT strategy. However, users continue to face challenges in implementing clouds, as older technologies evolve and newer ones like Docker c...
The best way to leverage your Cloud Expo presence as a sponsor and exhibitor is to plan your news announcements around our events. The press covering Cloud Expo and @ThingsExpo will have access to these releases and will amplify your news announcements. More than two dozen Cloud companies either set deals at our shows or have announced their mergers and acquisitions at Cloud Expo. Product announcements during our show provide your company with the most reach through our targeted audiences.
To Really Work for Enterprises, MultiCloud Adoption Requires Far Better and Inclusive Cloud Monitoring and Cost Management … But How? Overwhelmingly, even as enterprises have adopted cloud computing and are expanding to multi-cloud computing, IT leaders remain concerned about how to monitor, manage and control costs across hybrid and multi-cloud deployments. It’s clear that traditional IT monitoring and management approaches, designed after all for on-premises data centers, are falling short in ...
The deluge of IoT sensor data collected from connected devices and the powerful AI required to make that data actionable are giving rise to a hybrid ecosystem in which cloud, on-prem and edge processes become interweaved. Attendees will learn how emerging composable infrastructure solutions deliver the adaptive architecture needed to manage this new data reality. Machine learning algorithms can better anticipate data storms and automate resources to support surges, including fully scalable GPU-c...
A valuable conference experience generates new contacts, sales leads, potential strategic partners and potential investors; helps gather competitive intelligence and even provides inspiration for new products and services. Conference Guru works with conference organizers to pass great deals to great conferences, helping you discover new conferences and increase your return on investment.