diff options
Diffstat (limited to 'src/cpu/x86')
| -rw-r--r-- | src/cpu/x86/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/cpu/x86/Kconfig b/src/cpu/x86/Kconfig index 417989d764..828c0f9ce2 100644 --- a/src/cpu/x86/Kconfig +++ b/src/cpu/x86/Kconfig @@ -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 |