efi/libstub: Add limit argument to efi_random_alloc()

Browse source

x86 will need to limit the kernel memory allocation to the lowest 512
MiB of memory, to match the behavior of the existing bare metal KASLR
physical randomization logic. So in preparation for that, add a limit
parameter to efi_random_alloc() and wire it up.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20230807162720.545787-22-ardb@kernel.org

...

This commit is contained in:

Ard Biesheuvel 2023-08-07 18:27:18 +02:00 • committed by Borislav Petkov (AMD)

parent 8338151935

commit bc5ddceff4

4 changed files with 9 additions and 7 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

drivers/firmware/efi/libstub/arm64-stub.c

View file

2

drivers/firmware/efi/libstub/efistub.h

View file

10

drivers/firmware/efi/libstub/randomalloc.c

View file

2

drivers/firmware/efi/libstub/zboot.c

View file