efi/libstub: Add a helper function to split 64-bit values

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In several places 64-bit values need to be split up into two 32-bit
fields, in order to be backward-compatible with the old 32-bit ABIs.

Instead of open-coding this, add a helper function to set a 64-bit value
as two 32-bit fields.

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Link: https://lore.kernel.org/r/20200430182843.2510180-3-nivedita@alum.mit.edu
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

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Arvind Sankar 2020-04-30 14:28:34 -04:00 • committed by Ard Biesheuvel

parent 019512f1fd

commit eed4e0193e

3 changed files with 23 additions and 22 deletions

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7

drivers/firmware/efi/libstub/efistub.h

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6

drivers/firmware/efi/libstub/gop.c

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32

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

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