[PATCH v2 00/19] util/vfio-helpers: Allow using multiple MSIX IRQs

[Philippe Mathieu-Daudé]

This series allow using multiple MSIX IRQs
We currently share a single IRQ between 2 NVMe queues
(ADMIN and I/O). This series still uses 1 shared IRQ
but prepare for using multiple ones.

Since v1:
- Addressed Stefan comment in patch #14
  "Pass minimum page size to qemu_vfio_open_pci"
  (check the page size is in range with device)
- To reduce (and simplify) changes in patch #14, added
  new patch #2 "Introduce device/iommu 'page_size_min' variables"
- Added "Trace controller capabilities" useful to test the
  previous changes
- "Set request_alignment at initialization" reported by Stefan
  (and tested by Eric off-list).

Missing review: 2,3,4,14

$ git backport-diff -u v1
Key:
[----] : patches are identical
[####] : number of functional differences between upstream/downstream patch
[down] : patch is downstream-only
The flags [FC] indicate (F)unctional and (C)ontextual differences, respective=
ly

001/19:[----] [--] 'block/nvme: Correct minimum device page size'
002/19:[down] 'block/nvme: Set request_alignment at initialization'
003/19:[down] 'block/nvme: Introduce device/iommu 'page_size_min' variables'
004/19:[down] 'block/nvme: Trace controller capabilities'
005/19:[----] [--] 'util/vfio-helpers: Improve reporting unsupported IOMMU ty=
pe'
006/19:[----] [-C] 'util/vfio-helpers: Trace PCI I/O config accesses'
007/19:[----] [-C] 'util/vfio-helpers: Trace PCI BAR region info'
008/19:[----] [-C] 'util/vfio-helpers: Trace where BARs are mapped'
009/19:[----] [-C] 'util/vfio-helpers: Improve DMA trace events'
010/19:[----] [-C] 'util/vfio-helpers: Convert vfio_dump_mapping to trace eve=
nts'
011/19:[----] [-C] 'util/vfio-helpers: Let qemu_vfio_dma_map() propagate Erro=
r'
012/19:[----] [--] 'util/vfio-helpers: Let qemu_vfio_do_mapping() propagate E=
rror'
013/19:[----] [--] 'util/vfio-helpers: Let qemu_vfio_verify_mappings() use er=
ror_report()'
014/19:[0017] [FC] 'util/vfio-helpers: Pass minimum page size to qemu_vfio_op=
en_pci()'
015/19:[----] [-C] 'util/vfio-helpers: Report error when IOMMU page size is n=
ot supported'
016/19:[----] [--] 'util/vfio-helpers: Introduce qemu_vfio_pci_msix_init_irqs=
()'
017/19:[----] [--] 'util/vfio-helpers: Introduce qemu_vfio_pci_msix_set_irq()'
018/19:[----] [-C] 'block/nvme: Switch to using the MSIX API'
019/19:[----] [--] 'util/vfio-helpers: Remove now unused qemu_vfio_pci_init_i=
rq()'

Philippe Mathieu-Daud=C3=A9 (19):
  block/nvme: Correct minimum device page size
  block/nvme: Set request_alignment at initialization
  block/nvme: Introduce device/iommu 'page_size_min' variables
  block/nvme: Trace controller capabilities
  util/vfio-helpers: Improve reporting unsupported IOMMU type
  util/vfio-helpers: Trace PCI I/O config accesses
  util/vfio-helpers: Trace PCI BAR region info
  util/vfio-helpers: Trace where BARs are mapped
  util/vfio-helpers: Improve DMA trace events
  util/vfio-helpers: Convert vfio_dump_mapping to trace events
  util/vfio-helpers: Let qemu_vfio_dma_map() propagate Error
  util/vfio-helpers: Let qemu_vfio_do_mapping() propagate Error
  util/vfio-helpers: Let qemu_vfio_verify_mappings() use error_report()
  util/vfio-helpers: Pass minimum page size to qemu_vfio_open_pci()
  util/vfio-helpers: Report error when IOMMU page size is not supported
  util/vfio-helpers: Introduce qemu_vfio_pci_msix_init_irqs()
  util/vfio-helpers: Introduce qemu_vfio_pci_msix_set_irq()
  block/nvme: Switch to using the MSIX API
  util/vfio-helpers: Remove now unused qemu_vfio_pci_init_irq()

 include/qemu/vfio-helpers.h |  15 ++-
 block/nvme.c                |  58 +++++++++---
 util/vfio-helpers.c         | 183 +++++++++++++++++++++++++++---------
 block/trace-events          |   1 +
 util/trace-events           |  13 ++-
 5 files changed, 208 insertions(+), 62 deletions(-)

--=20
2.26.2