This series of patches (2 to vfio, the remainder to the sPAPR specific PCI code) improve the interfaces for passing through EEH (IBM's Enhanced Error Handling facility) from guest PCI devices to host PCI devices.
This allows EEH to be used on the normal spapr-pci-host-bridge device, removing any remaining need for the special spapr-vfio-pci-host-bridge device. The series has some similarities to my earlier series merging EEH support into the plain host bridge, but is substantially reworked to remove the serious conceptual error I made then. For now, this only allows EEH when (i) there is a single VFIO container attached to the vPHB, and (ii) there is only a single VFIO group attached to that container. (ii) is due to a kernel limitation - at present it will allow EEH calls on a container with multiple groups, but they won't work properly, because there is no code to make sure the EEH state on the host is synchronized between the groups. (i) could be addressed in future in one of two ways, either perform similar synchronization in qemu between the container states, or present each container as a separate PAPR Partitionable Endpoint to the guest and allow separate EEH state on each. The second approach is more complicated and may not work well with some PAPR addressing conventions, but does allow more flexibility in the guest. I hope to have this ready for merge in qemu-2.6. David Gibson (12): vfio: Start improving VFIO/EEH interface spapr_pci: Switch to vfio_eeh_as_op() interface spapr_pci: Eliminate class callbacks spapr_pci: Fold spapr_phb_vfio_eeh_configure() into spapr_pci code spapr_pci: Fold spapr_phb_vfio_eeh_reset() into spapr_pci code spapr_pci: Fold spapr_phb_vfio_eeh_get_state() into spapr_pci code spapr_pci: Fold spapr_phb_vfio_eeh_set_option() into spapr_pci code spapr_pci: Fold spapr_phb_vfio_reset() into spapr_pci code spapr_pci: Allow EEH on spapr-pci-host-bridge spapr_pci: (Mostly) remove spapr-pci-vfio-host-bridge spapr_pci: Remove finish_realize hook vfio: Eliminate vfio_container_ioctl() hw/ppc/spapr_pci.c | 203 +++++++++++++++++++++++++++--------- hw/ppc/spapr_pci_vfio.c | 245 +++----------------------------------------- hw/vfio/common.c | 94 +++++++++++------ include/hw/pci-host/spapr.h | 28 +---- include/hw/vfio/vfio.h | 4 +- 5 files changed, 235 insertions(+), 339 deletions(-) -- 2.5.0
