[Qemu-devel] [PATCH v3 0/2] Bug fixes for EEH on VFIO PCI devices

[Gavin Shan <gwshan@linux.vnet.ibm.com>]

The patches are fixing 2 issues for EEH on VFIO PCI devices. PATCH[1/2]
clears stale MSIx table of VFIO PCI devices when asserting fundamental
or hot PE reset so that their MSIx tables can be restored properly after
reset to avoid recursive EEH error. PATCH[2/2] clears PE frozen state
in case the guest hits excessive EEH errors. With the fix, the VFIO
PCI devices are expected to work again after rebooting guest.

Changelog
=========
v2 -> v3:
        * Introduced vfio_eeh_pe_reset(), which is called from spapr_pci_vfio.c
          when asserting PE reset, replaces vfio_container_eeh_event() to clear
          stale MSIx tables.
        * Droped the patch "VFIO: Disable INTx interrupt on EEH reset", which
          is caused by KVM bugs on host side.
v1 -> v2:
        * vfio_container_eeh_event() stub for !CONFIG_PCI and separate error
          message for this function. Dropped vfio_put_group() on NULL group
        * Disabling INTx interrupt, instead of clearing INTx pending flag
          during PE reset.
 
Gavin Shan (2):
  VFIO: Clear stale MSIx table during EEH reset
  sPAPR: Reenable EEH functionality on reboot

 hw/ppc/spapr_pci_vfio.c | 27 ++++++++++++++++++++++-----
 hw/vfio/Makefile.objs   |  6 +++++-
 hw/vfio/pci-stub.c      | 16 ++++++++++++++++
 hw/vfio/pci.c           | 36 ++++++++++++++++++++++++++++++++++++
 include/hw/vfio/vfio.h  |  2 ++
 5 files changed, 81 insertions(+), 6 deletions(-)
 create mode 100644 hw/vfio/pci-stub.c

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1.8.3.2