Messages in this thread | | | Date | Thu, 11 Jun 2020 10:49:53 -0400 | From | "Alex Xu (Hello71)" <> | Subject | Re: [patch for-5.8] dma-pool: decouple DMA_REMAP from DMA_COHERENT_POOL |
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Excerpts from David Rientjes's message of June 11, 2020 3:25 am: > DMA_REMAP is an unnecessary requirement for AMD SEV, which requires > DMA_COHERENT_POOL, so avoid selecting it when it is otherwise unnecessary. > > The only other requirement for DMA coherent pools is DMA_DIRECT_REMAP, so > ensure that properly selects the config option when needed. > > Fixes: 82fef0ad811f ("x86/mm: unencrypted non-blocking DMA allocations use > coherent pools") > Suggested-by: Christoph Hellwig <hch@lst.de> > Signed-off-by: David Rientjes <rientjes@google.com> > --- > kernel/dma/Kconfig | 10 +++++----- > 1 file changed, 5 insertions(+), 5 deletions(-) >
Works for me with SME on or off with af7b480103, and with SME off in abfbb29297. There is some regression with amdgpu and SME between those two points, I need to check that out too. I haven't tested either before or after with SEV (which I'm not even sure my system supports). Regardless, this is a definite improvement.
Tested-by: Alex Xu (Hello71) <alex_y_xu@yahoo.ca>
Thanks, Alex.
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