[PATCH kernel v11 00/10] powerpc/kvm/vfio: Enable in-kernel acceleration

[Alexey Kardashevskiy]

This is my current queue of patches to add acceleration of TCE
updates in KVM.

This is based on sha1 093b995e3b55 Huang Ying "mm, swap: Remove WARN_ON_ONCE() in free_swap_slot()".

Please comment. Thanks.



Changes:
v11:
* added rb:David to 04/10
* fixed reference leak in 10/10

v10:
* fixed bugs in 10/10
* fixed 04/10 to avoid iommu_table get/put race in 10/10

v9:
* renamed few exported symbols in 04/10
* reforked various objects reference counting in 10/10

v8:
* kept fixing oddities with error handling in 10/10

v7:
* added realmode's WARN_ON_ONCE_RM in arch/powerpc/kvm/book3s_64_vio_hv.c

v6:
* reworked the last patch in terms of error handling and parameters checking

v5:
* replaced "KVM: PPC: Separate TCE validation from update" with
"KVM: PPC: iommu: Unify TCE checking"
* changed already reviewed "powerpc/iommu/vfio_spapr_tce: Cleanup iommu_table disposal"
* reworked "KVM: PPC: VFIO: Add in-kernel acceleration for VFIO"
* more details in individual commit logs

v4:
* addressed comments from v3
* updated subject lines with correct component names
* regrouped the patchset in order:
	- powerpc fixes;
	- vfio_spapr_tce driver fixes;
	- KVM/PPC fixes;
	- KVM+PPC+VFIO;
* everything except last 2 patches have "Reviewed-By: David"

v3:
* there was no full repost, only last patch was posted

v2:
* 11/11 reworked to use new notifiers, it is rather RFC as it still has
a issue;
* got 09/11, 10/11 to use notifiers in 11/11;
* added rb: David to most of patches and added a comment in 05/11.


Alexey Kardashevskiy (10):
  powerpc/mmu: Add real mode support for IOMMU preregistered memory
  powerpc/powernv/iommu: Add real mode version of
    iommu_table_ops::exchange()
  powerpc/iommu/vfio_spapr_tce: Cleanup iommu_table disposal
  powerpc/vfio_spapr_tce: Add reference counting to iommu_table
  KVM: PPC: Reserve KVM_CAP_SPAPR_TCE_VFIO capability number
  KVM: PPC: Enable IOMMU_API for KVM_BOOK3S_64 permanently
  KVM: PPC: Pass kvm* to kvmppc_find_table()
  KVM: PPC: Use preregistered memory API to access TCE list
  KVM: PPC: iommu: Unify TCE checking
  KVM: PPC: VFIO: Add in-kernel acceleration for VFIO

 Documentation/virtual/kvm/devices/vfio.txt |  18 +-
 arch/powerpc/include/asm/iommu.h           |  32 ++-
 arch/powerpc/include/asm/kvm_host.h        |   8 +
 arch/powerpc/include/asm/kvm_ppc.h         |  12 +-
 arch/powerpc/include/asm/mmu_context.h     |   4 +
 include/uapi/linux/kvm.h                   |   7 +
 arch/powerpc/kernel/iommu.c                |  89 ++++++---
 arch/powerpc/kvm/book3s_64_vio.c           | 308 ++++++++++++++++++++++++++++-
 arch/powerpc/kvm/book3s_64_vio_hv.c        | 303 +++++++++++++++++++++++-----
 arch/powerpc/kvm/powerpc.c                 |   2 +
 arch/powerpc/mm/mmu_context_iommu.c        |  39 ++++
 arch/powerpc/platforms/powernv/pci-ioda.c  |  46 +++--
 arch/powerpc/platforms/powernv/pci.c       |   1 +
 arch/powerpc/platforms/pseries/iommu.c     |   3 +-
 arch/powerpc/platforms/pseries/vio.c       |   2 +-
 drivers/vfio/vfio_iommu_spapr_tce.c        |   2 +-
 virt/kvm/vfio.c                            | 105 ++++++++++
 arch/powerpc/kvm/Kconfig                   |   1 +
 18 files changed, 875 insertions(+), 107 deletions(-)

-- 
2.11.0