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2021-02-07sb/intel/bd82x6x: Support ME Soft Temporary Disable ModeEvgeny Zinoviev
- 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>
2020-05-18mb/lenovo/{x230, t430s}: add H8_HAS_PRIMARY_FN_KEYS for {x230s, t431s}Bill XIE
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>
2018-09-05mb/lenovo: Support dual graphics for xx20/xx30 ThinkPadsEvgeny Zinoviev
Add CMOS option that allows to use both integrated and discrete GPU. Tested on ThinkPad W530. Change-Id: I8842fef0fa1235eb91abf6b7e655ed4d8598adc7 Signed-off-by: Evgeny Zinoviev <me@ch1p.com> Reviewed-on: https://review.coreboot.org/28393 Reviewed-by: Patrick Rudolph <siro@das-labor.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-08-15mb/*/*/cmos.default: Decrease debug_level to 'Debug'Elyes HAOUAS
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>
2017-09-23mb/*/*: Remove rtc nvram configurable baud rateArthur Heymans
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>
2017-07-24Update files with no newline at the endMartin Roth
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>
2017-07-07mb/lenovo/*/cmos: Port USB Always OnPatrick Rudolph
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>
2017-06-03mb/lenovo/*/cmos: Remove unused option and checksum fixPatrick Rudolph
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>
2016-04-06src/mainboard: Disable power_on_after_fail CMOS option for laptopsPhilipp Deppenwiese
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>
2015-11-05mainboard: Remove last_boot NVRAM optionTimothy Pearson
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)
2015-02-08lenovo/t430s: Add new port.Nicolas Reinecke
The port is based on the x230 / t530. Tested - is in active use. Change-Id: Ic5ccfe70343e8aef3465690edce9cdebf153a44d Signed-off-by: Nicolas Reinecke <nr@das-labor.org> Reviewed-on: http://review.coreboot.org/8359 Tested-by: build bot (Jenkins) Reviewed-by: Philipp Deppenwiese <zaolin@das-labor.org> Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>