[Qemu-devel] [PATCH 00/17] s390x: the big pci update

[Cornelia Huck]

We had been looking at remodelling the pci representation for s390x
to handle our slightly odd architecture correctly some time ago
already, but now we have a patchset that we're happy with.

There's a bunch of bugfixes, cleanups and architecture conformance
changes in there, but the most interesting part is the modelling
(which, in some respects, takes a cue from what sPAPR does).

We introduce a 'zpci' device to hold s390x-specific properties like
the uid and fid. This 'zpci' device is connected to a run-of-the-mill
pci device via the 'target' property.

Example command line portion:

-device zpci,uid=1,fid=1,target=vpci0 \
-device vfio-pci,host=0000:00:00.0,id=vpci0 \
-device zpci,target=vpci1 \
-device vfio-pci,host=0001:00:00.0,id=vpci1 \
-device vfio-pci,host=0002:00:00.0,id=vpci2

For device vpci0, uid and fid are specified in the associated zpci
device.
For device vpci1, uid and fid are automatically generated.
For device vpci2, first an associated zpci device is generated and
then autogenerated values for uid and fid are placed in it.

This should accomodate both specifying our special parameters and
re-using standard statements for pci devices. You can still specify
bus/slot/function for the pci device, but it will not be propagated
into the guest (as the s390 pci architecture does not allow for it;
the guest only sees uid/fid).

The "introduce S390PCI<foo>" patches are probably the most interesting
for those looking at the modelling.

I'd love to see some feedback from a PCI perspective, as I'm happy
from the s390x perspective (and I'd like to see this in 2.7).

Branch available at git://github.com/cohuck/qemu s390x-pci-update

Yi Min Zhao (17):
  s390x/pci: fix failures of dma map/unmap
  s390x/pci: acceleration for getting S390pciState
  s390x/pci: write fid in CLP_QUERY_PCI_FN
  s390x/pci: unify FH_ macros
  s390x/pci: refactor s390_pci_find_dev_by_fh
  s390x/pci: enforce zPCI state checking
  s390x/pci: introduce S390PCIBus
  s390x/pci: introduce S390PCIIOMMU
  s390x/pci: introduce S390PCIBusDevice qdev
  s390x/pci: enable uid-checking
  s390x/pci: enable zpci hot-plug/hot-unplug
  s390x/pci: add checkings in CLP_SET_PCI_FN
  s390x/pci: refactor s390_pci_find_dev_by_idx
  s390x/pci: refactor list_pci
  s390x/pci: fix stpcifc_service_call
  s390x/pci: replace fid with idx in msg data of msix
  s390x/pci: make hot-unplug handler smoother

 hw/s390x/s390-pci-bus.c  | 579 +++++++++++++++++++++++++++++++++++------------
 hw/s390x/s390-pci-bus.h  |  77 ++++++-
 hw/s390x/s390-pci-inst.c | 266 ++++++++++++++++------
 hw/s390x/s390-pci-inst.h |   7 +-
 include/hw/s390x/sclp.h  |   1 +
 target-s390x/kvm.c       |   4 +-
 6 files changed, 718 insertions(+), 216 deletions(-)

-- 
2.9.0