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| author | Patrick Rudolph <patrick.rudolph@9elements.com> | 2019-05-20 09:21:43 +0200 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-05-29 20:01:12 +0000 |
| commit | edbcd057e6e8a991c8473a0da05081452db2f8f5 (patch) | |
| tree | 08e4c8646a56f5979330489fd752c4a6093571cc /Documentation | |
| parent | 702f83897730739af21d10649759589ae9a22203 (diff) | |
| download | coreboot-edbcd057e6e8a991c8473a0da05081452db2f8f5.tar.xz | |
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>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/northbridge/intel/sandybridge/index.md | 1 | ||||
| -rw-r--r-- | Documentation/northbridge/intel/sandybridge/me_cleaner.md | 20 |
2 files changed, 21 insertions, 0 deletions
diff --git a/Documentation/northbridge/intel/sandybridge/index.md b/Documentation/northbridge/intel/sandybridge/index.md index dcb090aad6..c1d4b9948d 100644 --- a/Documentation/northbridge/intel/sandybridge/index.md +++ b/Documentation/northbridge/intel/sandybridge/index.md @@ -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) diff --git a/Documentation/northbridge/intel/sandybridge/me_cleaner.md b/Documentation/northbridge/intel/sandybridge/me_cleaner.md new file mode 100644 index 0000000000..1086e7e091 --- /dev/null +++ b/Documentation/northbridge/intel/sandybridge/me_cleaner.md @@ -0,0 +1,20 @@ +# 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. |