tree 07abfc4f1a4ac2754a31a91384974eaed3a4210e
parent 5cfec4459d3ab7c5fd77beb40a43ee24406832f7
author Jonathan Zhang <jonzhang@fb.com> 1600126033 -0700
committer Commit Bot <commit-bot@chromium.org> 1602035164 +0000

UPSTREAM: drivers/intel/fsp2_0: use FSP to allocate APEI BERT memory region

APEI (ACPI Platform Error Interface) defines BERT (Boot Error Record
Table) memory region:
* Bootloader (firmware) generates UEFI CPER (Common Platform Error
Record) records, and populates BERT region.
* OS parses ACPI BERT table, finds the BERT region address, inteprets
the data and processes it accordingly.

When CONFIG_ACPI_BERT is defined, update FSP UPD BootLoaderTolumSize,
so FSP allocates memory region for it. The APEI BERT region is placed
on top of CBMEM, for the size of CONFIG_ACPI_BERT_SIZE.

Apart from APEI BERT region, we also have plan to add APEI HEST region
which holds OS runtime hardware error record, based on firmware
first hardware error handling model. HEST region will be reserved
same way as BERT region.

Note that CBMEM region can not be used for such purpose, the OS
(bert/hest) drivers are not able to access data held in CBMEM region,
as CBMEM is set as type 16 (configuration table).

An option considered was to reserve the BERT region under CBMEM.
However, we do not know the size of CBMEM till acpi tables are set up.
On the other hand, BERT region needs to be filled up before ACPI BERT
table is finalized.

BUG=none
BRANCH=none
TEST=none

Change-Id: I331b45b540b9e7cd8be634935dbc7bfa86405a95
Signed-off-by: Martin Roth <gaumless@gmail.com>
Original-Commit-Id: ce0e2a014009390c4527e064efb59260ef4d3a3b
Original-Change-Id: Ie72240e4c5fa01fcf937d33678c40f9ca826487a
Original-Signed-off-by: Jonathan Zhang <jonzhang@fb.com>
Original-Reviewed-on: https://review.coreboot.org/c/coreboot/+/45391
Original-Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Original-Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/coreboot/+/2446609
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: Martin Roth <martinroth@google.com>
Commit-Queue: Martin Roth <martinroth@google.com>