arm64: head: record CPU boot mode after enabling the MMU

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In order to avoid having to touch memory with the MMU and caches
disabled, and therefore having to invalidate it from the caches
explicitly, just defer storing the value until after the MMU has been
turned on, unless we are giving up with an error.

While at it, move the associated variable definitions into C code.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20220624150651.1358849-19-ardb@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>

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Ard Biesheuvel 2022-06-24 17:06:48 +02:00 • committed by Will Deacon

parent 6495b9ba62

commit 005e12676a

3 changed files with 23 additions and 39 deletions

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50

arch/arm64/kernel/head.S

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arch/arm64/kernel/hyp-stub.S

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arch/arm64/mm/mmu.c

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