[PATCH 0/2] lmb: consider EFI memory map
heinrich.schuchardt at canonical.com
Wed Jan 4 05:26:04 CET 2023
As reported in Debian bug #1027176 relocation of the initrd may lead to
overwriting memory used by the EFI sub-system.
Currently the available memory for images is determined via the lmb
library functions. The lmb library has several shortcomings:
* It does not protect against overwriting one image with another.
* The same routines to find reserved memory are called again and
In the long run we should move to allocating memory for images.
As an intermediate solutions let's add lmb-reservations for all EFI memory
areas that are not EFI_CONVENTIONAL_MEMORY.
The variable $loadaddr of at least the vexpress_ca9x4 board collids with
memory used by the EFI sub-system. Adjust $loadaddr for the vexpress
boards to a sane value.
Heinrich Schuchardt (2):
vexpress: adjust loadaddr
lmb: consider EFI memory map
include/configs/vexpress_common.h | 1 +
lib/lmb.c | 45 +++++++++++++++++++++++++++++++
2 files changed, 46 insertions(+)
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