Messages in this thread | | | Date | Thu, 22 May 2008 18:51:57 +0200 | From | Pavel Machek <> | Subject | Re: [PATCH] Intel Management Engine Interface |
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Hi!
> > We have addressed more issues raised on lkml after initial submission, > > especially the legacy device support issue which was removed in this > > patch. > > > > The Intel Management Engine Interface (aka HECI: Host Embedded > > Controller Interface ) enables communication between the host OS and > > the Management Engine firmware. MEI is bi-directional, and either the > > host or Intel AMT firmware can initiate transactions. > > > > The core hardware architecture of Intel Active Management Technology > > (Intel AMT) is resident in firmware. The micro-controller within the > > chipset's graphics and memory controller (GMCH) hub houses the > > Management Engine (ME) firmware, which implements various services > > on behalf of management applications. > > > > Some of the ME subsystems that can be access via MEI driver: > > > > - Intel(R) Quiet System Technology (QST) is implemented as a firmware > > subsystem that runs in the ME. Programs that wish to expose the > > health monitoring and fan speed control capabilities of Intel(R) QST > > will need to use the MEI driver to communicate with the ME sub-system. > > - ASF is the "Alert Standard Format" which is an DMTF manageability > > standard. It is implemented in the PC's hardware and firmware, and is > > managed from a remote console. > > > > Most recent Intel desktop chipsets have one or more of the above ME > > services. The MEI driver will make it possible to support the above > > features on Linux and provides applications access to the ME and it's > > features. > > What a lot of code. > > It'd be nice if the changelog were to describe the proposed and > all-important kernel<->userspace interface, please. From a five-second > peek it looks like a miscdev with ioctls? Ah, and there's read and > write too.
Actuallly, we already have perfectly good interface for sensor-like stuff -- in lm_sensors. Even acpi is moving in that direction...
-- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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