efi/libstub/x86: Use ULONG_MAX as upper bound for all allocations

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The header flag XLF_CAN_BE_LOADED_ABOVE_4G will inform us whether
allocations above 4 GiB for kernel, command line, etc are permitted,
so we take it into account when calling efi_allocate_pages() etc.

However, CONFIG_EFI_STUB implies CONFIG_RELOCATABLE, and so the flag
is guaranteed to be set on x86_64 builds, whereas i386 builds are
guaranteed to run under firmware that will not allocate above 4 GB
in the first place.

So drop the check, and just pass ULONG_MAX as the upper bound for
all allocations.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200303225054.28741-1-ardb@kernel.org
Link: https://lore.kernel.org/r/20200308080859.21568-27-ardb@kernel.org

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Ard Biesheuvel 2020-03-08 09:08:57 +01:00 • committed by Ingo Molnar

parent 8d8ab66a71

commit ac82d35699

1 changed files with 4 additions and 13 deletions

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drivers/firmware/efi/libstub/x86-stub.c

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