[PATCH v9 00/13] KVM: PPC: IOMMU in-kernel handling of VFIO

[Alexey Kardashevskiy]

This accelerates VFIO DMA operations on POWER by moving them
into kernel.

This depends on VFIO external API patch which is on its way to upstream.

Changes:
v9:
* replaced the "link logical bus number to IOMMU group" ioctl to KVM
with a KVM device doing the same thing, i.e. the actual changes are in
these 3 patches:
  KVM: PPC: reserve a capability and KVM device type for realmode VFIO
  KVM: PPC: remove warning from kvmppc_core_destroy_vm
  KVM: PPC: Add support for IOMMU in-kernel handling

* moved some VFIO external API bits to a separate patch to reduce the size
of the "KVM: PPC: Add support for IOMMU in-kernel handling" patch

* fixed code style problems reported by checkpatch.pl.

v8:
* fixed comments about capabilities numbers

v7:
* rebased on v3.11-rc3.
* VFIO external user API will go through VFIO tree so it is
excluded from this series.
* As nobody ever reacted on "hashtable: add hash_for_each_possible_rcu_notrace()",
Ben suggested to push it via his tree so I included it to the series.
* realmode_(get|put)_page is reworked.

More details in the individual patch comments.

Alexey Kardashevskiy (13):
  KVM: PPC: POWERNV: move iommu_add_device earlier
  hashtable: add hash_for_each_possible_rcu_notrace()
  KVM: PPC: reserve a capability number for multitce support
  KVM: PPC: reserve a capability and KVM device type for realmode VFIO
  powerpc: Prepare to support kernel handling of IOMMU map/unmap
  powerpc: add real mode support for dma operations on powernv
  KVM: PPC: enable IOMMU_API for KVM_BOOK3S_64 permanently
  KVM: PPC: Add support for multiple-TCE hcalls
  powerpc/iommu: rework to support realmode
  KVM: PPC: remove warning from kvmppc_core_destroy_vm
  KVM: PPC: add trampolines for VFIO external API
  KVM: PPC: Add support for IOMMU in-kernel handling
  KVM: PPC: Add hugepage support for IOMMU in-kernel handling

 Documentation/virtual/kvm/api.txt                  |  26 +
 .../virtual/kvm/devices/spapr_tce_iommu.txt        |  37 ++
 arch/powerpc/include/asm/iommu.h                   |  18 +-
 arch/powerpc/include/asm/kvm_host.h                |  38 ++
 arch/powerpc/include/asm/kvm_ppc.h                 |  16 +-
 arch/powerpc/include/asm/machdep.h                 |  12 +
 arch/powerpc/include/asm/pgtable-ppc64.h           |   2 +
 arch/powerpc/include/uapi/asm/kvm.h                |   8 +
 arch/powerpc/kernel/iommu.c                        | 243 +++++----
 arch/powerpc/kvm/Kconfig                           |   1 +
 arch/powerpc/kvm/book3s_64_vio.c                   | 597 ++++++++++++++++++++-
 arch/powerpc/kvm/book3s_64_vio_hv.c                | 408 +++++++++++++-
 arch/powerpc/kvm/book3s_hv.c                       |  42 +-
 arch/powerpc/kvm/book3s_hv_rmhandlers.S            |   8 +-
 arch/powerpc/kvm/book3s_pr_papr.c                  |  35 ++
 arch/powerpc/kvm/powerpc.c                         |   4 +
 arch/powerpc/mm/init_64.c                          |  50 +-
 arch/powerpc/platforms/powernv/pci-ioda.c          |  57 +-
 arch/powerpc/platforms/powernv/pci-p5ioc2.c        |   2 +-
 arch/powerpc/platforms/powernv/pci.c               |  75 ++-
 arch/powerpc/platforms/powernv/pci.h               |   3 +-
 arch/powerpc/platforms/pseries/iommu.c             |   8 +-
 include/linux/hashtable.h                          |  15 +
 include/linux/kvm_host.h                           |   1 +
 include/linux/mm.h                                 |  14 +
 include/linux/page-flags.h                         |   4 +-
 include/uapi/linux/kvm.h                           |   3 +
 virt/kvm/kvm_main.c                                |   5 +
 28 files changed, 1564 insertions(+), 168 deletions(-)
 create mode 100644 Documentation/virtual/kvm/devices/spapr_tce_iommu.txt

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1.8.4.rc4