[Qemu-devel] [PATCH 0/6] virtio pci 1.0 optimizations and fixes

[Jason Wang]

Hi all:

This series tries to fix the following issues:

- 1.0 mmio is slow. Fixing this by usinng wildcard mmio eventfd, then
  we could get speed up through kernel fast mmio bus on ept capable
  machine.
- 1.0 mmio is slow compared to pio. Fixing this by re-introducing pio
  notification capability. This will be useful for the arch/setups
  that fast mmio does not work.
- Some virtio pci 1.0 fields were not migrated. This will cause
  unexpected behaviour if migrate during driver initialization. Fixing
  this by introduce a transport specific callback and get/put
  transport specific fields for virtio 1.0.
- queue_enable read was broken. Fixing by set the queue_enable to true
  during guest write and clear it during reset.

Please review.
Thanks

Jason Wang (6):
  pc: introduce 2.5 machine type
  ppc: spapr: introduce 2.5 machine type
  virtio-pci: fix 1.0 virtqueue migration
  virtio-pci: use wildcard mmio eventfd for 1.0 notification cap
  virtio-pci: introduce pio notification capability for modern device
  virtio-pci: unbreak queue_enable read

 hw/i386/pc_piix.c              |  21 ++++-
 hw/i386/pc_q35.c               |  23 ++++-
 hw/ppc/spapr.c                 |  40 +++++++-
 hw/virtio/virtio-pci.c         | 206 ++++++++++++++++++++++++++++++++++++-----
 hw/virtio/virtio-pci.h         |  30 ++++--
 hw/virtio/virtio.c             |  58 ++++++++++++
 include/hw/compat.h            |   7 ++
 include/hw/i386/pc.h           |   3 +
 include/hw/virtio/virtio-bus.h |   3 +
 9 files changed, 357 insertions(+), 34 deletions(-)

-- 
2.1.4