arm64: mm: Preserve existing table mappings when mapping DRAM

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Instead of blindly overwriting an existing table entry when mapping DRAM
regions, take care not to replace a pre-existing table entry with a
block entry. This permits the logic of mapping the kernel's linear alias
to be simplified in a subsequent patch.

Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>

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Ard Biesheuvel 2026-05-29 17:01:55 +02:00 • committed by Will Deacon

parent 8dd640d923

commit a64293e993

1 changed files with 4 additions and 2 deletions

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arch/arm64/mm/mmu.c

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