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dma-direct: remove __dma_to_phys

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There is no harm in just always clearing the SME encryption bit, while
significantly simplifying the interface.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
This commit is contained in:
Christoph Hellwig
2020-09-08 17:56:22 +02:00
parent 96eb89caf7
commit 7bc5c428a6
13 changed files with 17 additions and 25 deletions
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6
kernel/dma/direct.c
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@@ -48,11 +48,6 @@ static gfp_t dma_direct_optimal_gfp_mask(struct device *dev, u64 dma_mask,
{
u64 dma_limit = min_not_zero(dma_mask, dev->bus_dma_limit);
if (force_dma_unencrypted(dev))
*phys_limit = __dma_to_phys(dev, dma_limit);
else
*phys_limit = dma_to_phys(dev, dma_limit);
/*
* Optimistically try the zone that the physical address mask falls
* into first. If that returns memory that isn't actually addressable
@@ -61,6 +56,7 @@ static gfp_t dma_direct_optimal_gfp_mask(struct device *dev, u64 dma_mask,
* Note that GFP_DMA32 and GFP_DMA are no ops without the corresponding
* zones.
*/
*phys_limit = dma_to_phys(dev, dma_limit);
if (*phys_limit <= DMA_BIT_MASK(zone_dma_bits))
return GFP_DMA;
if (*phys_limit <= DMA_BIT_MASK(32))