tree 8917ea75962d34806f07f38d1281b70b1871c1cd
parent 83ce0efc12811c1b11f71a8164949ff4f6117054
author Jisheng Zhang <jszhang@marvell.com> 1465372426 +0800
committer Catalin Marinas <catalin.marinas@arm.com> 1466524493 +0100

arm64: mm: only initialize swiotlb when necessary

we only initialize swiotlb when swiotlb_force is true or not all system
memory is DMA-able, this trivial optimization saves us 64MB when
swiotlb is not necessary.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>