mirror of https://gitee.com/openkylin/linux.git
102 lines
4.6 KiB
ReStructuredText
102 lines
4.6 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0
|
|
|
|
Intel(R) Active Management Technology (Intel AMT)
|
|
=================================================
|
|
|
|
Prominent usage of the Intel ME Interface is to communicate with Intel(R)
|
|
Active Management Technology (Intel AMT) implemented in firmware running on
|
|
the Intel ME.
|
|
|
|
Intel AMT provides the ability to manage a host remotely out-of-band (OOB)
|
|
even when the operating system running on the host processor has crashed or
|
|
is in a sleep state.
|
|
|
|
Some examples of Intel AMT usage are:
|
|
- Monitoring hardware state and platform components
|
|
- Remote power off/on (useful for green computing or overnight IT
|
|
maintenance)
|
|
- OS updates
|
|
- Storage of useful platform information such as software assets
|
|
- Built-in hardware KVM
|
|
- Selective network isolation of Ethernet and IP protocol flows based
|
|
on policies set by a remote management console
|
|
- IDE device redirection from remote management console
|
|
|
|
Intel AMT (OOB) communication is based on SOAP (deprecated
|
|
starting with Release 6.0) over HTTP/S or WS-Management protocol over
|
|
HTTP/S that are received from a remote management console application.
|
|
|
|
For more information about Intel AMT:
|
|
https://software.intel.com/sites/manageability/AMT_Implementation_and_Reference_Guide/default.htm
|
|
|
|
|
|
Intel AMT Applications
|
|
----------------------
|
|
|
|
1) Intel Local Management Service (Intel LMS)
|
|
|
|
Applications running locally on the platform communicate with Intel AMT Release
|
|
2.0 and later releases in the same way that network applications do via SOAP
|
|
over HTTP (deprecated starting with Release 6.0) or with WS-Management over
|
|
SOAP over HTTP. This means that some Intel AMT features can be accessed from a
|
|
local application using the same network interface as a remote application
|
|
communicating with Intel AMT over the network.
|
|
|
|
When a local application sends a message addressed to the local Intel AMT host
|
|
name, the Intel LMS, which listens for traffic directed to the host name,
|
|
intercepts the message and routes it to the Intel MEI.
|
|
For more information:
|
|
https://software.intel.com/sites/manageability/AMT_Implementation_and_Reference_Guide/default.htm
|
|
Under "About Intel AMT" => "Local Access"
|
|
|
|
For downloading Intel LMS:
|
|
https://github.com/intel/lms
|
|
|
|
The Intel LMS opens a connection using the Intel MEI driver to the Intel LMS
|
|
firmware feature using a defined GUID and then communicates with the feature
|
|
using a protocol called Intel AMT Port Forwarding Protocol (Intel APF protocol).
|
|
The protocol is used to maintain multiple sessions with Intel AMT from a
|
|
single application.
|
|
|
|
See the protocol specification in the Intel AMT Software Development Kit (SDK)
|
|
https://software.intel.com/sites/manageability/AMT_Implementation_and_Reference_Guide/default.htm
|
|
Under "SDK Resources" => "Intel(R) vPro(TM) Gateway (MPS)"
|
|
=> "Information for Intel(R) vPro(TM) Gateway Developers"
|
|
=> "Description of the Intel AMT Port Forwarding (APF) Protocol"
|
|
|
|
2) Intel AMT Remote configuration using a Local Agent
|
|
|
|
A Local Agent enables IT personnel to configure Intel AMT out-of-the-box
|
|
without requiring installing additional data to enable setup. The remote
|
|
configuration process may involve an ISV-developed remote configuration
|
|
agent that runs on the host.
|
|
For more information:
|
|
https://software.intel.com/sites/manageability/AMT_Implementation_and_Reference_Guide/default.htm
|
|
Under "Setup and Configuration of Intel AMT" =>
|
|
"SDK Tools Supporting Setup and Configuration" =>
|
|
"Using the Local Agent Sample"
|
|
|
|
Intel AMT OS Health Watchdog
|
|
----------------------------
|
|
|
|
The Intel AMT Watchdog is an OS Health (Hang/Crash) watchdog.
|
|
Whenever the OS hangs or crashes, Intel AMT will send an event
|
|
to any subscriber to this event. This mechanism means that
|
|
IT knows when a platform crashes even when there is a hard failure on the host.
|
|
|
|
The Intel AMT Watchdog is composed of two parts:
|
|
1) Firmware feature - receives the heartbeats
|
|
and sends an event when the heartbeats stop.
|
|
2) Intel MEI iAMT watchdog driver - connects to the watchdog feature,
|
|
configures the watchdog and sends the heartbeats.
|
|
|
|
The Intel iAMT watchdog MEI driver uses the kernel watchdog API to configure
|
|
the Intel AMT Watchdog and to send heartbeats to it. The default timeout of the
|
|
watchdog is 120 seconds.
|
|
|
|
If the Intel AMT is not enabled in the firmware then the watchdog client won't enumerate
|
|
on the me client bus and watchdog devices won't be exposed.
|
|
|
|
---
|
|
linux-mei@linux.intel.com
|