This series enables support for PCI SR-IOV capability for PVH domains.
It allows Dom0 to enable and use SR-IOV virtual functions and for these
functions to be passed to guests.

To achieve this, add handlers for SRIOV_CONTROL registers, simplified handlers
for VFs headers. Xen relies on dom0 to enable SR-IOV and call
PHYSDEVOP_pci_device_* to inform about addition/removal of VFs.

Core functionality is based on previous work[1].

Tested on R-Car Spider board with Samsung NVMe SSD Controller 980 and Intel
X550T ethernet card.

[1]: https://lore.kernel.org/xen-devel/20180717094830.54806-1-roger.pau@citrix.com/

v2->v3:
* rework the series for VF discovery by Dom0
* drop pci/iommu: Check that IOMMU supports removing devices, see [2]
* drop vpci: add a wait operation to the vpci vcpu pending actions
* add vpci: allow queueing of mapping operations
* minor changes in individual patches

[2]: https://patchew.org/Xen/a59c2da0d4c72deb42950e9a8e3982fbdee60668.1775555766.git.mykyta._5Fpoturai@epam.com/
v1->v2:
* rework the series for VF discovery in Xen
* separate doc changes into the last patch


Mykyta Poturai (2):
  vpci: Use pervcpu ranges for BAR mapping
  docs: Update SR-IOV support status

Stewart Hildebrand (5):
  vpci: rename and export vpci_modify_bars
  vpci: rename and export vpci_guest_mem_bar_{read,write}
  vpci: allow queueing of mapping operations
  vpci: add SR-IOV support for PVH Dom0
  vpci: add SR-IOV support for DomUs

 SUPPORT.md                 |   2 -
 xen/common/domain.c        |   2 +
 xen/drivers/vpci/Makefile  |   1 +
 xen/drivers/vpci/header.c  | 314 +++++++++++++++++++------------
 xen/drivers/vpci/private.h |  10 +
 xen/drivers/vpci/sriov.c   | 366 +++++++++++++++++++++++++++++++++++++
 xen/drivers/vpci/vpci.c    |  10 +-
 xen/include/xen/vpci.h     |  28 ++-
 8 files changed, 607 insertions(+), 126 deletions(-)
 create mode 100644 xen/drivers/vpci/sriov.c

-- 
2.51.2