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* [PATCH v9 0/7] iommu: enhance IOMMU default DMA mode build options
@ 2019-06-13  8:42 Zhen Lei
  2019-06-13  8:42 ` [PATCH v9 1/7] " Zhen Lei
                   ` (6 more replies)
  0 siblings, 7 replies; 8+ messages in thread
From: Zhen Lei @ 2019-06-13  8:42 UTC (permalink / raw)
  To: Jean-Philippe Brucker, John Garry, Robin Murphy, Will Deacon,
	Joerg Roedel, Jonathan Corbet, linux-doc, Sebastian Ott,
	Gerald Schaefer, Martin Schwidefsky, Heiko Carstens,
	Benjamin Herrenschmidt, Paul Mackerras, Michael Ellerman,
	Tony Luck, Fenghua Yu, Thomas Gleixner, Ingo Molnar,
	Borislav Petkov, H . Peter Anvin, David Woodhouse, iommu,
	linux-kernel, linux-s390, linuxppc-dev, x86, linux-ia64

v8--> v9
1. Fix some text editing errors

v7--> v8
1. Split into multiple small patches base on ARCHs or IOMMU drivers.
2. Hide the unsupported build options on the related ARCH or IOMMU.

v6 --> v7:
1. Fix some text editing errors

v5 --> v6:
1. give up adding boot option iommu.dma_mode

v4 --> v5:
As Hanjun and Thomas Gleixner's suggestion:
1. Keep the old ARCH specific boot options no change.
2. Keep build option CONFIG_IOMMU_DEFAULT_PASSTHROUGH no change.

v4:
As Robin Murphy's suggestion:
"It's also not necessarily obvious to the user how this interacts with
IOMMU_DEFAULT_PASSTHROUGH, so if we really do go down this route, maybe it
would be better to refactor the whole lot into a single selection of something
like IOMMU_DEFAULT_MODE anyway."

In this version, I tried to normalize the IOMMU dma mode boot options for all
ARCHs. When IOMMU is enabled, there are 3 dma modes: paasthrough(bypass),
lazy(mapping but defer the IOTLB invalidation), strict. But currently each
ARCHs defined their private boot options, different with each other. For
example, to enable/disable "passthrough", ARM64 use iommu.passthrough=1/0,
X86 use iommu=pt/nopt, PPC/POWERNV use iommu=nobypass.

Zhen Lei (7):
  iommu: enhance IOMMU default DMA mode build options
  x86/dma: use IS_ENABLED() to simplify the code
  s390/pci: add support for IOMMU default DMA mode build options
  powernv/iommu: add support for IOMMU default DMA mode build options
  iommu/vt-d: add support for IOMMU default DMA mode build options
  iommu/amd: add support for IOMMU default DMA mode build options
  ia64: hide build option IOMMU_DEFAULT_PASSTHROUGH

 arch/powerpc/platforms/powernv/pci-ioda.c |  3 +-
 arch/s390/pci/pci_dma.c                   |  2 +-
 arch/x86/kernel/pci-dma.c                 |  6 +---
 drivers/iommu/Kconfig                     | 48 +++++++++++++++++++++++++------
 drivers/iommu/amd_iommu_init.c            |  2 +-
 drivers/iommu/intel-iommu.c               |  2 +-
 drivers/iommu/iommu.c                     |  3 +-
 7 files changed, 48 insertions(+), 18 deletions(-)

-- 
1.8.3


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Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-06-13  8:42 [PATCH v9 0/7] iommu: enhance IOMMU default DMA mode build options Zhen Lei
2019-06-13  8:42 ` [PATCH v9 1/7] " Zhen Lei
2019-06-13  8:42 ` [PATCH v9 2/7] x86/dma: use IS_ENABLED() to simplify the code Zhen Lei
2019-06-13  8:42 ` [PATCH v9 3/7] s390/pci: add support for IOMMU default DMA mode build options Zhen Lei
2019-06-13  8:42 ` [PATCH v9 4/7] powernv/iommu: " Zhen Lei
2019-06-13  8:42 ` [PATCH v9 5/7] iommu/vt-d: " Zhen Lei
2019-06-13  8:42 ` [PATCH v9 6/7] iommu/amd: " Zhen Lei
2019-06-13  8:42 ` [PATCH v9 7/7] ia64: hide build option IOMMU_DEFAULT_PASSTHROUGH Zhen Lei

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