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

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Date:	Wed, 28 Aug 2013 18:37:37 +1000
From:	Alexey Kardashevskiy <aik@...abs.ru>
To:	linuxppc-dev@...ts.ozlabs.org
Cc:	Alexey Kardashevskiy <aik@...abs.ru>,
	David Gibson <david@...son.dropbear.id.au>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Gleb Natapov <gleb@...hat.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Alexander Graf <agraf@...e.de>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, kvm-ppc@...r.kernel.org,
	linux-mm@...ck.org, Alex Williamson <alex.williamson@...hat.com>
Subject: [PATCH v9 00/13] KVM: PPC: IOMMU in-kernel handling of VFIO

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

-- 
1.8.4.rc4

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