[PATCH kernel 0/9] KVM, PPC, VFIO: Enable in-kernel acceleration

[Alexey Kardashevskiy]

This enables in-kernel acceleration of H_PUT_TCE/etc hypercalls for pseries
guests using VFIO. As pseries is a para-virtualized environment, the guest
can see and control IOMMUs via special hypercalls which let the guest
to add and remove mappings in real hardware IOMMU.

This was posted last time quite a long time ago so I dropped versions now,
this re-respin is v1. This was successfully used in the PowerKVM product
for quite a while now.

This is based on git://git.kernel.org/pub/scm/virt/kvm/kvm.git , "next"
branch which got "multi-tce in-kernel acceleration" and "64 bit in-kernel
TCE" support.

Please comment. Thanks!


Alexey Kardashevskiy (9):
  KVM: PPC: Reserve KVM_CAP_SPAPR_TCE_VFIO capability number
  powerpc/mmu: Add real mode support for IOMMU preregistered memory
  KVM: PPC: Use preregistered memory API to access TCE list
  powerpc/powernv/iommu: Add real mode version of xchg()
  KVM: PPC: Enable IOMMU_API for KVM_BOOK3S_64 permanently
  KVM: PPC: Associate IOMMU group with guest view of TCE table
  KVM: PPC: Create a virtual-mode only TCE table handlers
  KVM: PPC: Add in-kernel handling for VFIO
  KVM: PPC: VFIO device: support SPAPR TCE

 Documentation/virtual/kvm/devices/vfio.txt |  21 +-
 arch/powerpc/include/asm/iommu.h           |   7 +
 arch/powerpc/include/asm/kvm_host.h        |   8 +
 arch/powerpc/include/asm/kvm_ppc.h         |   6 +
 arch/powerpc/include/asm/mmu_context.h     |   6 +-
 arch/powerpc/kernel/iommu.c                |  15 ++
 arch/powerpc/kvm/Kconfig                   |   2 +
 arch/powerpc/kvm/Makefile                  |   5 +-
 arch/powerpc/kvm/book3s_64_vio.c           | 344 +++++++++++++++++++++++++++++
 arch/powerpc/kvm/book3s_64_vio_hv.c        | 280 +++++++++++++++++++++--
 arch/powerpc/kvm/book3s_hv_rmhandlers.S    |   4 +-
 arch/powerpc/kvm/powerpc.c                 |   1 +
 arch/powerpc/mm/mmu_context_iommu.c        |  45 +++-
 arch/powerpc/platforms/powernv/pci-ioda.c  |  28 ++-
 include/uapi/linux/kvm.h                   |  10 +
 virt/kvm/vfio.c                            | 106 +++++++++
 16 files changed, 855 insertions(+), 33 deletions(-)

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2.5.0.rc3