[Qemu-devel] [RFC PATCH qemu v2 0/5] vfio: SPAPR IOMMU v2 (memory preregistration support)

[Alexey Kardashevskiy]

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.
I left versions in changelog of 5/5 for convenience.

Please comment, specifically about how many memory listeners we want to
have in VFIO.

The existing listener listens on PCI address space which in fact is RAM
on x86 but is not on sPAPR. Memory preregistration requires listening
on RAM for sPAPR too. Having a listener without a filter is tricky as it
will be notified on VIO address spaces too so having more that one listener
makes some sense. Any input is welcome.

Thanks!


Alexey Kardashevskiy (5):
  vfio: Switch from TARGET_PAGE_MASK to qemu_real_host_page_mask
  vfio: Skip PCI BARs in memory listener
  vfio: Store IOMMU type in container
  vfio: Refactor memory listener to accommodate more IOMMU types
  vfio: spapr: Add SPAPR IOMMU v2 support (DMA memory preregistering)

 hw/vfio/common.c              | 207 ++++++++++++++++++++++++++++++++----------
 hw/vfio/pci.c                 |  30 +++---
 include/hw/vfio/vfio-common.h |   7 ++
 trace-events                  |   2 +
 4 files changed, 183 insertions(+), 63 deletions(-)

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2.4.0.rc3.8.gfb3e7d5