Documentation: Warn about ME cleaner on Sandy Bridge

Document known issues with 'disabled' ME.

Change-Id: I364f3ed49341523c781eb2f3b41e866f33632a7e
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32889
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Patrick Rudolph 2019-05-20 09:21:43 +02:00 committed by Patrick Georgi
parent 702f838977
commit edbcd057e6
2 changed files with 21 additions and 0 deletions

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@ -6,3 +6,4 @@ This section contains documentation about coreboot on specific Intel "Sandy Brid
- [Native Ram Initialization](nri.md)
- [RAM initialization feature matrix](nri_features.md)
- [ME Cleaner](me_cleaner.md)

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# ME Cleaner
It's possible to 'clean' the ME partition within the flash medium as part
of the build process. While cleaning as much code as possible is removed
from the ME firmware partition. In this state the ME errors out and doesn't
operate any more.
**Using a 'cleaned' ME partition may lead to issues and its use should be
carefully evaulated.**
## Observations with 'cleaned' ME
* Instable LPC bus
* SuperIO is malfunctioning
* TPM is malfunctioning
* Random system shutdowns on high bus activity
## Filing bug reports
Always test with unmodified IFD and ME section before reporting bugs to the
coreboot project.