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| author | Eugene Myers <cedarhouse@comcast.net> | 2022-02-07 16:45:22 -0500 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2022-02-24 00:27:37 +0000 |
| commit | b2c681fc4a1d852f5b436660e7d3a967cf5e7333 (patch) | |
| tree | e806f2c5386b63833fcd548b1549c2d84392dd50 /src/device | |
| parent | a514192ffee49266568ce1f2bb3cbbebf05c36b8 (diff) | |
security/intel/stm: Make STM setup MP safe
Some processor families allow for SMM setup to be done in parallel.
On processors that have this feature, the BIOS resource list becomes
unusable for some processors during STM startup.
This patch covers two cases: (1) The BIOS resource list becomes twice
as long because the smm_relocation function is called twice - this is
resolved by recreating the list on each invocation. (2) Not all
processors receive the correct resource list pointer - this is resolved
by having every processor execute the pointer calculation code, which is
a lot faster then forcing all processors to spin lock waiting for this
value to be calculated.
This patch has been tested on a Purism L1UM-1X8C and Purism 15v4.
Signed-off-by: Eugene Myers <cedarhouse@comcast.net>
Change-Id: I7619038edc78f306bd7eb95844bd1598766f8b37
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61689
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eugene Myers <cedarhouse1@comcast.net>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Diffstat (limited to 'src/device')
0 files changed, 0 insertions, 0 deletions