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drivers/smmstore: Increase default size of store to 512KB

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The previous default size of 256KB provided for only 64KB of actual
space for EFI variables, and after accounting for fragmentation, did
not provide enough free space for applying updates, such as for the
UEFI revocation database (DBX). Increasing it to 512KB allows for
192KB space for variables, and allows the UEFI DBX to be updated
properly via fwupd.

TEST=build/boot google/drobit, verify UEFI DBX able to be successfully
updated via fwupd.

Change-Id: I8d6a2051f3ad50117d41cec2bbbe3aaafa7e65c2
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90287
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jason Glenesk <jason.glenesk@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This commit is contained in:
Matt DeVillier 2025-11-29 16:43:01 -06:00
commit d32a372846
1 changed files with 1 additions and 1 deletions
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2
src/drivers/smmstore/Kconfig
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@ -23,7 +23,7 @@ if SMMSTORE
config SMMSTORE_SIZE
hex "size of the SMMSTORE FMAP region"
default 0x40000
default 0x80000
help
Sets the size of the default SMMSTORE FMAP region.
If using an UEFI payload, note that UEFI specifies at least 64K.