diff options
| author | Robert Zieba <robertzieba@google.com> | 2022-09-07 16:25:15 -0600 |
|---|---|---|
| committer | Martin L Roth <gaumless@gmail.com> | 2023-03-05 15:31:07 +0000 |
| commit | ac8c378777d861000d82eea1c7439f16dcd45797 (patch) | |
| tree | 58dafb5dd844410cec91e56c6f7ec5c8defd8fd5 /src/cpu/x86/Kconfig | |
| parent | f1a4cffc88d8a5490c444f41b60eaaf544399998 (diff) | |
cpu/x86/smm: Add PCI resource 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. Add support to the existing SMM runtime to allow storing
PCI resources in SMRAM and then later retrieving them.
BRANCH=guybrush
BUG=b:186792595
TEST=builds
Signed-off-by: Robert Zieba <robertzieba@google.com>
Change-Id: I23fb1e935dd1b89f1cc5c834cc2025f0fe5fda37
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67931
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Diffstat (limited to 'src/cpu/x86/Kconfig')
| -rw-r--r-- | src/cpu/x86/Kconfig | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/cpu/x86/Kconfig b/src/cpu/x86/Kconfig index edba27bd40..d95e6cc4c3 100644 --- a/src/cpu/x86/Kconfig +++ b/src/cpu/x86/Kconfig @@ -168,6 +168,19 @@ config SMM_LAPIC_REMAP_MITIGATION || NORTHBRIDGE_INTEL_E7505 || NORTHBRIDGE_INTEL_IRONLAKE default n +config SMM_PCI_RESOURCE_STORE + bool + default n + help + This option enables support for storing PCI resources in SMRAM so + SMM can tell if they've been altered. + +config SMM_PCI_RESOURCE_STORE_NUM_SLOTS + int + default 8 + help + Number of slots available to store PCI BARs in SMRAM + config X86_AMD_FIXED_MTRRS bool default n |