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* provide in-place uncached remapping for dma-direct
@ 2019-11-07 17:40 ` Christoph Hellwig
  0 siblings, 0 replies; 27+ messages in thread
From: Christoph Hellwig @ 2019-11-07 17:40 UTC (permalink / raw)
  To: Jonas Bonn, Stefan Kristiansson, Stafford Horne
  Cc: Marek Szyprowski, Robin Murphy, Will Deacon, Mark Rutland,
	openrisc, iommu, linux-arm-kernel, linux-arch, linux-kernel

Hi all,

this series provides support for remapping places uncached in-place in
the generic dma-direct code, and moves openrisc over from its own
in-place remapping scheme.  The arm64 folks also had interest in such
a scheme to avoid problems with speculating into cache aliases.

Also all architectures that always use small page mappings for the
kernel and have non-coherent DMA should look into enabling this
scheme, as it is much more efficient than the vmap remapping.

^ permalink raw reply	[flat|nested] 27+ messages in thread
* provide in-place uncached remapping for dma-direct (resend)
@ 2020-02-20 17:01 Christoph Hellwig
  2020-02-20 17:01   ` Christoph Hellwig
  0 siblings, 1 reply; 27+ messages in thread
From: Christoph Hellwig @ 2020-02-20 17:01 UTC (permalink / raw)
  To: Jonas Bonn, Stefan Kristiansson, Stafford Horne
  Cc: Marek Szyprowski, Robin Murphy, Will Deacon, Mark Rutland,
	openrisc, iommu, linux-arm-kernel, linux-arch, linux-kernel

Hi all,

this series provides support for remapping places uncached in-place in
the generic dma-direct code, and moves openrisc over from its own
in-place remapping scheme.  The arm64 folks also had interest in such
a scheme to avoid problems with speculating into cache aliases.

Also all architectures that always use small page mappings for the
kernel and have non-coherent DMA should look into enabling this
scheme, as it is much more efficient than the vmap remapping.

^ permalink raw reply	[flat|nested] 27+ messages in thread

end of thread, other threads:[~2020-02-25 10:10 UTC | newest]

Thread overview: 27+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-11-07 17:40 provide in-place uncached remapping for dma-direct Christoph Hellwig
2019-11-07 17:40 ` [OpenRISC] " Christoph Hellwig
2019-11-07 17:40 ` Christoph Hellwig
2019-11-07 17:40 ` Christoph Hellwig
2019-11-07 17:40 ` Christoph Hellwig
2019-11-07 17:40 ` [PATCH 1/2] dma-mapping: support setting memory uncached in place Christoph Hellwig
2019-11-07 17:40   ` [OpenRISC] " Christoph Hellwig
2019-11-07 17:40   ` Christoph Hellwig
2019-11-07 17:40   ` Christoph Hellwig
2019-11-07 17:40   ` Christoph Hellwig
2019-11-07 17:40 ` [PATCH 2/2] openrisc: use the generic in-place uncached DMA allocator Christoph Hellwig
2019-11-07 17:40   ` [OpenRISC] " Christoph Hellwig
2019-11-07 17:40   ` Christoph Hellwig
2019-11-07 17:40   ` Christoph Hellwig
2020-02-20 17:01 provide in-place uncached remapping for dma-direct (resend) Christoph Hellwig
2020-02-20 17:01 ` [PATCH 2/2] openrisc: use the generic in-place uncached DMA allocator Christoph Hellwig
2020-02-20 17:01   ` Christoph Hellwig
2020-02-20 17:01   ` Christoph Hellwig
2020-02-20 17:01   ` Christoph Hellwig
2020-02-21 22:14   ` Stafford Horne
2020-02-21 22:14     ` Stafford Horne
2020-02-21 22:14     ` Stafford Horne
2020-02-24 19:45     ` Christoph Hellwig
2020-02-24 19:45       ` Christoph Hellwig
2020-02-24 19:45       ` Christoph Hellwig
2020-02-25 10:10       ` Stafford Horne
2020-02-25 10:10         ` Stafford Horne
2020-02-25 10:10         ` Stafford Horne

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