Commit de375cd1 authored Mar 11, 2016 by Vinayak Menon Committed by Patrick Daly Aug 24, 2016

arm64: dma-mapping: flush the tlb on unremap



Make sure there are no stale tlb entries when
dma_unremap returns, thus preventing speculative
fetches.

Change-Id: I22070de282f25fe5ea20177e67a6d629123e29a4
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
Signed-off-by: Ramesh Gupta Guntha <rgguntha@codeaurora.org>
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>

parent 8d64f42a

arch/arm64/mm/dma-mapping.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -464,6 +464,8 @@ static void arm64_dma_unremap(struct device dev, void remapped_addr,
		return;
		}
		vunmap(remapped_addr);
		flush_tlb_kernel_range((unsigned long)remapped_addr,
		(unsigned long)(remapped_addr + size));
		}

		static struct dma_map_ops swiotlb_dma_ops = {