arm64: Use v8.5-RNG entropy for KASLR seed

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When seeding KALSR on a system where we have architecture level random
number generation make use of that entropy, mixing it in with the seed
passed by the bootloader. Since this is run very early in init before
feature detection is complete we open code rather than use archrandom.h.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>

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Mark Brown 2020-01-21 12:58:53 +00:00 • committed by Will Deacon

parent 1a50ec0b3b

commit 2e8e1ea88c

2 changed files with 19 additions and 0 deletions

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8

arch/arm64/include/asm/archrandom.h

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11

arch/arm64/kernel/kaslr.c

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