[PATCH 00/16] 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.

The series is organized as:
- Fix device minimum page size (prerequisite: patch 1)
- Check IOMMU minimum page size (patches 3, 4)
- Boring cleanups already reviewed (patches 2, 5-12)
- Introduce helpers to use multiple MSIX (patches 13, 14)
- Switch NVMe block driver to use the multiple MSIX API (15)
- Remove single MSIX helper (16).

Most patches are trivial, except 13 and 14 which are the
important VFIO ones.

Please review,

Phil.

Philippe Mathieu-Daudé (16):
  block/nvme: Correct minimum device page size
  util/vfio-helpers: Improve reporting unsupported IOMMU type
  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: 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: 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                |  33 ++++---
 util/vfio-helpers.c         | 183 +++++++++++++++++++++++++++---------
 util/trace-events           |  13 ++-
 4 files changed, 182 insertions(+), 62 deletions(-)

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2.26.2