[Qemu-devel] [PATCH v6 0/4] pcie: Add support for Single Root I/O Virtualization

[Knut Omang <knut.omang@oracle.com>]

This patch set implements generic support for SR/IOV as an extension to the
core PCIe functionality, similar to the way other capabilities such as AER
is implemented.

There is no implementation of any device that provides
SR/IOV support included, but I have implemented a test
example which can be found together with this patch set here:

  git://github.com/knuto/qemu.git sriov_patches_v6

Testing with the example device was documented here:

  http://lists.nongnu.org/archive/html/qemu-devel/2014-08/msg05110.html

Changes since v5:
  - Fix reset logic that got broken in v5. Reset logic is now equal to
    that of v4 except that two ambiguous initialization statements
    (introduced during rebase) have been removed
  - From private feedback, added observer functions for SR/IOV values
    in pcie_sriov.h. To ease access to the vf number, the SR/IOV VF device
    struct extension now caches this value.

Changes since v4:
  - Mostly based on feeback in Marcel Apfelbaum's review:
  - The patch with changes to pci_regs.h got eliminated by rebase
  - Added some documentation as an additional patch
  - Some trivial fixes moved to separate patch
  - Modified code to use error and trace functions instead of printfs

Changes since v3:
  - Reworked 'pci: Update pci_regs header' to merge kernel version improvements
    with the current qemu version instead of copying from the kernel version.

Changes since v2:
  - Rebased onto 090d0bfd
  - Un-qdev'ified - avoids issues when resetting NUM_VFS
  - Fixed handling of vf_offset/vf_stride

Changes since v1:
  - Rebased on top of latest master, eliminating prereqs.
  - Implement proper support for VF_STRIDE, VF_OFFSET and SUP_PGSIZE
    Time better spent fixing it than explaining what the previous
    limitations were.
    - Added new first patch to fix pci bug related to this
  - Split out patch to pci_default_config_write to a separate patch 2
    to highlight bug fix.
  - Refactored out logic into new source files
    hw/pci/pcie_sriov.c include/hw/pci/pcie_sriov.h
    similar to pcie_aer.c/h.
  - Rename functions and introduce structs to better separate
    pf and vf functionality.
  - Replaced is_vf member with pci_is_vf() function abstraction
  - Fix numerous syntax, whitespace and comment issues
    according to Michael's review.
  - Fix memory leaks.
  - Removed igb example device - a rebased version available
    on github instead.

Knut Omang (4):
  pci: Make use of the devfn property when registering new devices
  pcie: Add support for Single Root I/O Virtualization (SR/IOV)
  pcie: Add some SR/IOV API documentation in docs/pcie_sriov.txt
  pcie: A few minor fixes (type+code simplify)

 docs/pcie_sriov.txt         | 115 ++++++++++++++++++
 hw/pci/Makefile.objs        |   2 +-
 hw/pci/pci.c                |  97 ++++++++++++----
 hw/pci/pcie.c               |   9 +-
 hw/pci/pcie_sriov.c         | 277 ++++++++++++++++++++++++++++++++++++++++++++
 include/hw/pci/pci.h        |  11 +-
 include/hw/pci/pcie.h       |   6 +
 include/hw/pci/pcie_sriov.h |  67 +++++++++++
 include/qemu/typedefs.h     |   2 +
 trace-events                |   5 +
 10 files changed, 561 insertions(+), 30 deletions(-)
 create mode 100644 docs/pcie_sriov.txt
 create mode 100644 hw/pci/pcie_sriov.c
 create mode 100644 include/hw/pci/pcie_sriov.h

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2.4.3