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