Attention is currently required from: Arthur Heymans, Robert Zieba, Raul Rangel, Nico Huber, Angel Pons, Karthik Ramasubramanian, Felix Held.

Robert Zieba uploaded patch set #6 to this change.

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cpu/x86/smm: Add PCI BAR store functionality

In certain cases data within protected memmory areas like SMRAM could
be leaked or modified if an attacker remaps PCI BARs to point within
that area. This commit adds support to the existing SMM to allow storing
PCI BARs in SMRAM and then later retrieved.

BUG=b:186792595

Signed-off-by: Robert Zieba <robertzieba@google.com>
Change-Id: I23fb1e935dd1b89f1cc5c834cc2025f0fe5fda37
---
M src/cpu/x86/Kconfig
M src/cpu/x86/smm/Makefile.inc
A src/cpu/x86/smm/pci_bar_store.c
M src/cpu/x86/smm/smm_module_handler.c
M src/cpu/x86/smm/smm_module_loader.c
M src/include/cpu/x86/smm.h
6 files changed, 143 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/31/67931/6

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