[PATCH v4 00/16] powernv: vfio: Add Dynamic DMA windows (DDW)

[Alexey Kardashevskiy]

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:
v4:
* addressed Ben's comments
* big rework with moving tce_xxx callbacks out of ppc_md

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 (16):
  rcu: Define notrace version of list_for_each_entry_rcu and
    list_entry_rcu
  KVM: PPC: Use RCU for arch.spapr_tce_tables
  mm: Add helpers for locked_vm
  KVM: PPC: Account TCE-containing pages in locked_vm
  powerpc/iommu: Fix comments with it_page_shift
  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: Move tce_xxx callbacks from ppc_md to iommu_table
  powerpc/powernv: Release replaced TCE
  powerpc/pseries/lpar: Enable VFIO
  powerpc/powernv: Implement Dynamic DMA windows (DDW) for IODA
  vfio: powerpc/spapr: Reuse locked_vm accounting helpers
  vfio: powerpc/spapr: Use it_page_size
  vfio: powerpc/spapr: Enable Dynamic DMA windows

 arch/powerpc/include/asm/iommu.h            |  33 ++-
 arch/powerpc/include/asm/kvm_host.h         |   1 +
 arch/powerpc/include/asm/machdep.h          |  25 --
 arch/powerpc/include/asm/tce.h              |  38 +++
 arch/powerpc/kernel/iommu.c                 | 158 ++++++++-----
 arch/powerpc/kernel/vio.c                   |   5 +-
 arch/powerpc/kvm/book3s.c                   |   2 +-
 arch/powerpc/kvm/book3s_64_vio.c            |  43 +++-
 arch/powerpc/kvm/book3s_64_vio_hv.c         |   6 +-
 arch/powerpc/platforms/cell/iommu.c         |   9 +-
 arch/powerpc/platforms/pasemi/iommu.c       |   8 +-
 arch/powerpc/platforms/powernv/pci-ioda.c   | 239 ++++++++++++++++---
 arch/powerpc/platforms/powernv/pci-p5ioc2.c |   4 +-
 arch/powerpc/platforms/powernv/pci.c        |  86 ++++---
 arch/powerpc/platforms/powernv/pci.h        |  16 +-
 arch/powerpc/platforms/pseries/iommu.c      |  77 ++++--
 arch/powerpc/sysdev/dart_iommu.c            |  13 +-
 drivers/vfio/vfio_iommu_spapr_tce.c         | 348 ++++++++++++++++++++++++----
 include/linux/mm.h                          |   3 +
 include/linux/rculist.h                     |  38 +++
 include/uapi/linux/vfio.h                   |  37 ++-
 mm/mlock.c                                  |  49 ++++
 22 files changed, 990 insertions(+), 248 deletions(-)

-- 
2.0.0