[v3,0/5] Retrieving zPCI specific info from QEMU

Message

Matthew Rosato Sept. 7, 2019, 12:16 a.m. UTC

Note: These patches by Pierre got lost in the ether a few months back
as he has been unavailable to carry them forward.  I've made changes
based upon comments received on the kernel part of his last version.

This patch implement the QEMU part to retrieve ZPCI specific
information from the host.
The Linux part has been posted on a separate patch on the LKML.

Subject: [PATCH v4 0/4] Retrieving zPCI specific info with VFIO
  
We use the PCI VFIO interface to retrieve ZPCI specific information
from the host with a ZPCI specific device region.
 
The retrieval is done only once per function and function group
during the plugging of the device.
The guest's requests are filled with shadow values we keep for
the duration of the device remains plugged.

Still there are some values we need to virtualize, like
the UID and FID of the zPCI function, and we currently
only allow the refresh bit for the zPCI group flags.

Note that we export the CLP specific definitions in a dedicated
file for clarity.

Changes since v2:
- update vfio_zdev.h to match kernel + fix packing attribute
- update vfio.h to match kernel changes

Pierre Morel (5):
  vfio: vfio_iommu_type1: linux header place holder
  s390: PCI: Creation a header dedicated to PCI CLP
  s390: vfio_pci: Use a PCI Group structure
  s390: vfio_pci: Use a PCI Function structure
  s390: vfio_pci: Get zPCI function info from host

 hw/s390x/s390-pci-bus.c         | 145 +++++++++++++++++++++++++--
 hw/s390x/s390-pci-bus.h         |  15 ++-
 hw/s390x/s390-pci-clp.h         | 211 ++++++++++++++++++++++++++++++++++++++++
 hw/s390x/s390-pci-inst.c        |  28 +++---
 hw/s390x/s390-pci-inst.h        | 196 -------------------------------------
 linux-headers/linux/vfio.h      |   7 +-
 linux-headers/linux/vfio_zdev.h |  35 +++++++
 7 files changed, 417 insertions(+), 220 deletions(-)
 create mode 100644 hw/s390x/s390-pci-clp.h
 create mode 100644 linux-headers/linux/vfio_zdev.h