arm64: idreg-override: Avoid kstrtou64() to parse a single hex digit

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All ID register value overrides are =0 with the exception of the nokaslr
pseudo feature which uses =1. In order to remove the dependency on
kstrtou64(), which is part of the core kernel and no longer usable once
we move idreg-override into the early mini C runtime, let's just parse a
single hex digit (with optional leading 0x) and set the output value
accordingly.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20231129111555.3594833-62-ardb@google.com
Signed-off-by: Will Deacon <will@kernel.org>

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Ard Biesheuvel 2023-11-29 12:16:15 +01:00 • committed by Will Deacon

parent 060260a6be

commit ea48626f8f

1 changed files with 15 additions and 1 deletions

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arch/arm64/kernel/idreg-override.c

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