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cpu/x86/Kconfig: Add SMM Kconfig help

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Signed-off-by: Maximilian Brune <maximilian.brune@9elements.com>
Change-Id: Ia0a5c48c6314f53c4ed72958f5d6f839f0a5c2ca
Reviewed-on: https://review.coreboot.org/c/coreboot/+/77973
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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Maximilian Brune 2023-09-18 00:44:33 +02:00 committed by Nico Huber
parent 3f56bd2394
commit ab4b220a35
1 changed files with 8 additions and 0 deletions
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src/cpu/x86/Kconfig
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@ -163,11 +163,19 @@ config SMM_ASEG
bool
default n
depends on !NO_SMM
help
Legacy memory region of SMM (System Management Mode). It has been
replaced by TSEG and is currently only used for QEMU emulation target.
config SMM_TSEG
bool
default y
depends on !(NO_SMM || SMM_ASEG)
help
Top of Low Memory Segment (TSEG) is comprised of the SMRAM and IEDRAM.
SMRAM is a memory region used in SMM (System Management Mode) only.
IEDRAM is a memory region used for enhanced debug features.
SMM-mode processor access to TSEG always targets the physical DRAM.
if HAVE_SMI_HANDLER