[PATCH kernel v2 0/2] DMA, powerpc/dma: Fallback to dma_ops when persistent memory present

From: Alexey Kardashevskiy
Date: Tue Oct 27 2020 - 06:19:24 EST


This allows mixing direct DMA (to/from RAM) and
IOMMU (to/from apersistent memory) on the PPC64/pseries
platform.

This replaces this: https://lkml.org/lkml/2020/10/20/1085
A lesser evil this is :)

This is based on sha1
4525c8781ec0 Linus Torvalds "scsi: qla2xxx: remove incorrect sparse #ifdef".

Please comment. Thanks.



Alexey Kardashevskiy (2):
dma: Allow mixing bypass and normal IOMMU operation
powerpc/dma: Fallback to dma_ops when persistent memory present

arch/powerpc/kernel/dma-iommu.c | 12 ++++-
arch/powerpc/platforms/pseries/iommu.c | 44 ++++++++++++++-----
kernel/dma/mapping.c | 61 +++++++++++++++++++++++++-
arch/powerpc/Kconfig | 1 +
kernel/dma/Kconfig | 4 ++
5 files changed, 108 insertions(+), 14 deletions(-)

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2.17.1