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- Add support for ME Soft Temporary Disable Mode. In this mode, ME
doesn't load its kernel and freezes at Bring UP (BUP) phase. This mode
is saved in ME NVRAM (and thus will remain for next reboots and
poweroffs).
- Add support of new CMOS option for Sandy Bridge and Ivy Bridge
ThinkPads.
HOW TO USE
To disable ME:
1. nvramtool -w me_state=Disabled
2. reboot
To enable it back:
1. nvramtool -w me_state=Normal
2. reboot
To check current status:
intelmetool -m
Tested on ThinkPad X230 and ThinkPad X220.
BACKGROUND
There's no Intel documentation that would explain how this should be
implemented, in public. Working binary sequence for MKHI command to put
ME in Soft Temporary Disable Mode, as well as a way to bring ME out of
it (by writing to H_GS register), was found and published by researchers
from PT Security:
1. To disable ME, BIOS issues the disable command (before End of Post)
and reboots. ME is supposed to be disabled on the next boot after
DID (DRAM Init Done).
My numerous tests show that issuing the command and rebooting is not
enough. If we reboot too early, ME will not be disabled. Apparently,
it is doing something in background after receiving the command. It
works with a delay of 500-1000 ms.
I also tried to dump all known (documented) registers, such as GMES
and HFS, before and during the next 2 seconds after execution of the
disable command to find a possible indication that something's
changed in ME and we're ready to reboot. Found nothing
unfortunately.
2. To enable ME back, host writes value 0x20000000 to H_GS.
PT slides don't contain any more information on it, but my tests
show, that after writing this value, GMES[31:28] is changing from
0x01 (BUP phase) to 0x03 (Policy Module) to 0x06 (Host
Communication). Then, after some more time, fw_init_complete bit of
HFS becomes 1.
This means that ME starts loading its kernel immediately, without
reboot.
On the other hand, Lenovo BIOS clearly perform a reboot after
enabling it (one reboot after saving the settings, then ThinkPad
logo appears, and then one more reboot). I'm assuming we have to
reset too.
Change-Id: Ic01526c9731cbef4e8552bbc352133a2415787c2
Signed-off-by: Evgeny Zinoviev <me@ch1p.io>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37115
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
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X230s and T431s have keyboard similar to the one found on t440p, so
H8_HAS_PRIMARY_FN_KEYS and related cmos options may apply to them.
Tested on both X230s and T431s.
Change-Id: I234820b92093acdd64ff60cae39015547b6e981e
Signed-off-by: Bill XIE <persmule@hardenedlinux.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41403
Reviewed-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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Used default console log level is 7 in src/console/Kconfig.
So let cmos.default use the same level as default.
Change-Id: Ia39ee457a8985142f6e7a674532995b11cb52198
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/28006
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tristan Corrick <tristan@corrick.kiwi>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Martin Roth <martinroth@google.com>
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There have been discussions about removing this since it does not seem
to be used much and only creates troubles for boards without defaults,
not to mention that it was configurable on many boards that do not
even feature uart.
It is still possible to configure the baudrate through the Kconfig
option.
Change-Id: I71698d9b188eeac73670b18b757dff5fcea0df41
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/19682
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
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Change-Id: I8febb8d74e2463622cab0313c543ceebec71fdf4
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/20705
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
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Port commit f1395d82: "ec/lenovo/h8: Add USB Always On"
to other Thinkpad boards, as it seems to work fine on all
generations.
Change-Id: I6dcbfaae2a444d9a679ecb64a87dc2a59b8fd281
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/20106
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
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Fix for all Sandy-Bridge and Ivy-Bridge devices.
Remove unused option "hyper_threading".
Increase CMOS checksum range to cover all user adjustable settings.
Change-Id: I02f7af13d9c82d7f531d4b49b3bc0e5a20c14b55
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/19955
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
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power_on_after_fail=Enable in cmos.default leads to wake on AC behaviour
on mobile systems. Therefore set cmos.default entry to "Disable" in order
to improve user experience.
Change-Id: I977a4e6bc028c8c4c7fc1c2f5fdd74a59e951c60
Signed-off-by: Philipp Deppenwiese <zaolin@das-labor.org>
Reviewed-on: https://review.coreboot.org/13884
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Alexander Couzens <lynxis@fe80.eu>
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The last_boot NVRAM option was deprecated and removed in
commit 3bfd7cc6. Remove the last_boot option from all
affected mainboards to eliminate user confusion.
Change-Id: I7e201b9cf21dfe5dda156785bad078524098626d
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: http://review.coreboot.org/12316
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins)
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probably a problem in MRC:
- EHCI output failure after sysagent
- no S3
- no MRC cache
- MRC needs watchdog
- less MTRR could be used by some memory map optimisations
Not tested:
- dock (probably doesn't work)
- msata (probably works)
- wwan (probably works)
- mini displayport (probably works)
Blobs:
MRC
VGA Oprom
Change-Id: I5bdb9372971f48e048848d57b6c924b79782dbde
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/4679
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>
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