[PATCH kernel v4 0/2] DMA, powerpc/dma: Fallback to dma_ops when persistent memory present

Alexey Kardashevskiy
2020-10-29T02:36:39Z

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

This replaces https://lkml.org/lkml/2020/10/28/929
which replaces https://lkml.org/lkml/2020/10/27/418
which replaces https://lkml.org/lkml/2020/10/20/1085

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 mapped DMA operation
powerpc/dma: Fallback to dma_ops when persistent memory present

arch/powerpc/kernel/dma-iommu.c | 73 +++++++++++++++++++++++++-
arch/powerpc/platforms/pseries/iommu.c | 51 ++++++++++++++----
kernel/dma/mapping.c | 26 +++++++--
arch/powerpc/Kconfig | 1 +
kernel/dma/Kconfig | 4 ++
5 files changed, 139 insertions(+), 16 deletions(-)