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authorBill XIE <persmule@gmail.com>2017-08-22 16:26:22 +0800
committerNico Huber <nico.h@gmx.de>2017-08-30 10:32:00 +0000
commitd533b16669a3bacb19b2824e6b4bc76a2a18c92a (patch)
tree2659ee2c6687da3047fe96699dc69ab5b4054bd8 /src/soc/intel/apollolake/car.c
parentf9267f9bcdcc98f4c1689de3c573feaee511f13d (diff)
sb/intel/*: add option to lockdown chipset on normal boot path
On platforms with a PCH, some registers within host bridge should be locked down on each normal boot path (done by either coreboot or payload) and S3 resume (always done by coreboot). A function to perform such locking is implemented in src/northbridge/ intel/*/finalize.c, and is designed as the handler of an #SMI triggered with outb(APM_CNT_FINALIZE, APM_CNT), but currently this #SMI is only triggered during s3 resume, and not on normal boot path. This problem has beed discussed in https://mail.coreboot.org/pipermail/coreboot/2017-August/084924.html . This time, an option "INTEL_CHIPSET_LOCKDOWN" within src/southbridge/ intel/common/Kconfig is added to control the actual locking, which depends on several compatibility flags, including "HAVE_INTEL_CHIPSET_LOCKDOWN". In this commit, "ibexpeak", "bd82x6x", "fsp_bd82x6x", and "lynxpoint" have the flag "HAVE_INTEL_CHIPSET_LOCKDOWN" selected. The change is only well tested on Sandy Bridge, my Lenovo x230. Change-Id: I43d4142291c8737b29738c41e8c484328b297b55 Signed-off-by: Bill XIE <persmule@gmail.com> Reviewed-on: https://review.coreboot.org/21129 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
Diffstat (limited to 'src/soc/intel/apollolake/car.c')
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