[Qemu-devel] [RFC PATCH qemu 0/4] vfio: SPAPR IOMMU v2 (memory preregistration support)

[Alexey Kardashevskiy <aik@ozlabs.ru>]

Yet another try, reworked the whole patchset.

Here are few patches to prepare an existing listener for handling memory
preregistration for SPAPR guests running on POWER8.

This used to be a part of DDW patchset but now is separated as requested.


Please comment. Thanks!


Changes:
v4:
* have 2 listeners now - "iommu" and "prereg"
* removed iommu_data
* many smaller changes

v3:
* removed incorrect "vfio: Skip PCI BARs in memory listener"
* removed page size changes from quirks as they did not completely fix
the crashes happening on POWER8 (only total removal helps there)
* added "memory: Add reporting of supported page sizes"


Alexey Kardashevskiy (4):
  memory: Add reporting of supported page sizes
  vfio: Generalize IOMMU memory listener
  vfio: Use different page size for different IOMMU types
  vfio: spapr: Add SPAPR IOMMU v2 support (DMA memory preregistering)

 hw/ppc/spapr_iommu.c          |   8 ++
 hw/vfio/common.c              | 217 +++++++++++++++++++++++++++++++++---------
 include/exec/memory.h         |  11 +++
 include/hw/vfio/vfio-common.h |  26 ++---
 memory.c                      |   9 ++
 trace-events                  |   2 +
 6 files changed, 214 insertions(+), 59 deletions(-)

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2.4.0.rc3.8.gfb3e7d5