arm64/mm: Simplify SWIOTLB setup in arch_mm_preinit()

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At the moment, arch_mm_preinit() checks if the system has limited
addressing or is running under CCA to enable SWIOTLB, only after to
be forced to true anyway if it was false due to
CONFIG_DMA_BOUNCE_UNALIGNED_KMALLOC being unconditionally true for
arm64.

Simplify this logic, by making it clear that SWIOTLB is always used
but its size depends on the address layout of the system.

Signed-off-by: Mostafa Saleh <smostafa@google.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
Tested-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>

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Mostafa Saleh 2026-06-03 11:05:20 +00:00 • committed by Will Deacon

parent 24f55f511b

commit 442d366cc1

1 changed files with 3 additions and 7 deletions

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arch/arm64/mm/init.c

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