[Qemu-devel] [RFC v8.1 00/13] vfio-pci: pass the aer error to guest

[Chen Fan <chen.fan.fnst@cn.fujitsu.com>]

For now, for vfio pci passthough devices when qemu receives
an error from host aer report, there just terminate the guest,
but usually user want to know what error occurred but stop the
guest, so this patches add aer capability support for vfio device,
and pass the error to guest, and have guest driver to recover
from the error.
and turning on SERR# for error forwording in bridge control register
patch in seabios has been merged.

v8-v8.1:
   1. add check the case when one aer devices is re-hotplugged
      to upper bus which will conflict the present which enable aer.
   2. add vfio_pci_affect_devices_is_multi to specify signal or
      multi in-use when call hot reset.

v7-v8:
   1. some bug fixes requested by Alex

v6-v7:
   1. add has_bus_reset to support reset host bus.

v5-v6:
   1. add secondary bus callbacks to reset host bus.

v3-v4:
   1. add 'x-aer' for user to off aer capability.
   2. refactor vfio device to parse extended capabilities.

v2-v3:
   1. refactor vfio device to parse extended capability.
   2. add global property for piix4 to disable vfio aer cap.

v1-v2:
   1. turn on SERR# for bridge control register in firmware.
   2. initilize aer capability for vfio device.
   3. fix some trivial bug.

Chen Fan (13):
  vfio: extract vfio_get_hot_reset_info as a single function
  vfio: squeeze out vfio_pci_do_hot_reset for support bus reset
  vfio: add pcie extanded capability support
  aer: impove pcie_aer_init to support vfio device
  vfio: add aer support for vfio device
  vfio: add check host bus reset is support or not
  vfio: add check for vfio devices which enable aer should support bus
    reset
  pci: add bus reset_notifiers callbacks for host bus reset
  vfio: add sec_bus_reset notifier to notify physical bus reset is
    needed
  vfio: do hot bus reset when do virtual secondary bus reset
  pcie_aer: expose pcie_aer_msg() interface
  vfio-pci: pass the aer error to guest
  vfio: add 'aer' property to expose aercap

 hw/pci-bridge/ioh3420.c            |   2 +-
 hw/pci-bridge/xio3130_downstream.c |   2 +-
 hw/pci-bridge/xio3130_upstream.c   |   2 +-
 hw/pci/pci.c                       |  16 +
 hw/pci/pci_bridge.c                |   5 +
 hw/pci/pcie_aer.c                  |   6 +-
 hw/vfio/pci.c                      | 587 +++++++++++++++++++++++++++++++++----
 include/hw/pci/pci.h               |   4 +
 include/hw/pci/pci_bus.h           |   2 +
 include/hw/pci/pcie_aer.h          |   3 +-
 10 files changed, 566 insertions(+), 63 deletions(-)

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1.9.3