[PATCH v3 00/18] powernv: vfio: Add Dynamic DMA windows (DDW)

[Alexey Kardashevskiy <aik@ozlabs.ru>]

This prepares existing upstream kernel for DDW (Dynamic DMA windows) and
adds actual DDW support for VFIO.

This patchset does not contain any in-kernel acceleration stuff.

This patchset does not enable DDW for emulated devices.

Changes:
v3:
* applied multiple comments from Gavin regarding error checking
and callbacks placements

v2:
* moved "Account TCE pages in locked_vm" here (was in later series)
* added counting for huge window to locked_vm (ugly but better than nothing)
* fixed bug with missing >>PAGE_SHIFT when calling pfn_to_page



Alexey Kardashevskiy (18):
  powerpc/iommu: Fix comments with it_page_shift
  KVM: PPC: Use RCU when adding to arch.spapr_tce_tables
  KVM: PPC: Account TCE pages in locked_vm
  vfio: powerpc: Move locked_vm accounting to a helper
  powerpc/powernv: Use it_page_shift for TCE invalidation
  powerpc/powernv: Use it_page_shift in TCE build
  powerpc/powernv: Add a page size parameter to
    pnv_pci_setup_iommu_table()
  powerpc/powernv: Make invalidate() a callback
  powerpc/spapr: vfio: Implement spapr_tce_iommu_ops
  powerpc/powernv: Convert/move set_bypass() callback to
    take_ownership()
  powerpc/iommu: Fix IOMMU ownership control functions
  powerpc/iommu: Fix missing permission bits in
    iommu_put_tce_user_mode()
  powerpc/iommu: Extend ppc_md.tce_build(_rm) to return old TCE values
  powerpc/powernv: Return non-zero TCE from pnv_tce_build
  powerpc/iommu: Implement put_page() if TCE had non-zero value
  powerpc/powernv: Implement Dynamic DMA windows (DDW) for IODA
  vfio: Use it_page_size
  vfio: powerpc: Enable Dynamic DMA windows

 arch/powerpc/include/asm/iommu.h            |   7 +-
 arch/powerpc/include/asm/machdep.h          |   2 +
 arch/powerpc/include/asm/tce.h              |  38 +++
 arch/powerpc/kernel/iommu.c                 |  98 +++++---
 arch/powerpc/kvm/book3s_64_vio.c            |  37 ++-
 arch/powerpc/platforms/powernv/pci-ioda.c   | 255 ++++++++++++++++---
 arch/powerpc/platforms/powernv/pci-p5ioc2.c |   4 +-
 arch/powerpc/platforms/powernv/pci.c        |  64 +++--
 arch/powerpc/platforms/powernv/pci.h        |  17 +-
 arch/powerpc/platforms/pseries/iommu.c      |  17 +-
 arch/powerpc/sysdev/dart_iommu.c            |   1 +
 drivers/vfio/vfio_iommu_spapr_tce.c         | 365 ++++++++++++++++++++++++----
 include/uapi/linux/vfio.h                   |  37 ++-
 13 files changed, 797 insertions(+), 145 deletions(-)

-- 
2.0.0