[PATCH v8 00/15] hw/pci: SR-IOV related fixes and improvements

[Akihiko Odaki <akihiko.odaki@daynix.com>]

I submitted a RFC series[1] to add support for SR-IOV emulation to
virtio-net-pci. During the development of the series, I fixed some
trivial bugs and made improvements that I think are independently
useful. This series extracts those fixes and improvements from the RFC
series.

[1]: https://patchew.org/QEMU/20231210-sriov-v2-0-b959e8a6dfaf@daynix.com/

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
Changes in v8:
- Clarified that "hw/pci: Replace -1 with UINT32_MAX for romsize" is
  not a bug fix. (Markus Armbruster)
- Squashed patch "vfio: Avoid inspecting option QDict for rombar" into
  "hw/pci: Determine if rombar is explicitly enabled".
  (Markus Armbruster)
- Noted the minor semantics change for patch "hw/pci: Determine if
  rombar is explicitly enabled". (Markus Armbruster)
- Link to v7: https://lore.kernel.org/r/20240224-reuse-v7-0-29c14bcb952e@daynix.com

Changes in v7:
- Replaced -1 with UINT32_MAX when expressing uint32_t.
  (Markus Armbruster)
- Added patch "hw/pci: Replace -1 with UINT32_MAX for romsize".
- Link to v6: https://lore.kernel.org/r/20240220-reuse-v6-0-2e42a28b0cf2@daynix.com

Changes in v6:
- Fixed migration.
- Added patch "pcie_sriov: Do not manually unrealize".
- Restored patch "pcie_sriov: Release VFs failed to realize" that was
  missed in v5.
- Link to v5: https://lore.kernel.org/r/20240218-reuse-v5-0-e4fc1c19b5a9@daynix.com

Changes in v5:
- Added patch "hw/pci: Always call pcie_sriov_pf_reset()".
- Added patch "pcie_sriov: Reset SR-IOV extended capability".
- Removed a reference to PCI_SRIOV_CTRL_VFE in hw/nvme.
  (Michael S. Tsirkin)
- Noted the impact on the guest of patch "pcie_sriov: Do not reset
  NumVFs after unregistering VFs". (Michael S. Tsirkin)
- Changed to use pcie_sriov_num_vfs().
- Restored pci_set_power() and changed it to call pci_set_enabled() only
  for PFs with an expalanation. (Michael S. Tsirkin)
- Reordered patches.
- Link to v4: https://lore.kernel.org/r/20240214-reuse-v4-0-89ad093a07f4@daynix.com

Changes in v4:
- Reverted the change to pci_rom_bar_explicitly_enabled().
  (Michael S. Tsirkin)
- Added patch "pcie_sriov: Do not reset NumVFs after unregistering VFs".
- Added patch "hw/nvme: Refer to dev->exp.sriov_pf.num_vfs".
- Link to v3: https://lore.kernel.org/r/20240212-reuse-v3-0-8017b689ce7f@daynix.com

Changes in v3:
- Extracted patch "hw/pci: Use -1 as a default value for rombar" from
  patch "hw/pci: Determine if rombar is explicitly enabled"
  (Philippe Mathieu-Daudé)
- Added an audit result of PCIDevice::rom_bar to the message of patch
  "hw/pci: Use -1 as a default value for rombar"
  (Philippe Mathieu-Daudé)
- Link to v2: https://lore.kernel.org/r/20240210-reuse-v2-0-24ba2a502692@daynix.com

Changes in v2:
- Reset after enabling a function so that NVMe VF state gets updated.
- Link to v1: https://lore.kernel.org/r/20240203-reuse-v1-0-5be8c5ce6338@daynix.com

---
Akihiko Odaki (15):
      hw/nvme: Use pcie_sriov_num_vfs()
      pcie_sriov: Validate NumVFs
      pcie_sriov: Reset SR-IOV extended capability
      pcie_sriov: Do not reset NumVFs after disabling VFs
      hw/pci: Always call pcie_sriov_pf_reset()
      hw/pci: Rename has_power to enabled
      pcie_sriov: Do not manually unrealize
      pcie_sriov: Reuse SR-IOV VF device instances
      pcie_sriov: Release VFs failed to realize
      pcie_sriov: Remove num_vfs from PCIESriovPF
      pcie_sriov: Register VFs after migration
      hw/pci: Replace -1 with UINT32_MAX for romsize
      hw/pci: Use UINT32_MAX as a default value for rombar
      hw/pci: Determine if rombar is explicitly enabled
      hw/qdev: Remove opts member

 docs/pcie_sriov.txt         |   8 ++-
 include/hw/pci/pci.h        |   2 +-
 include/hw/pci/pci_device.h |  22 +++++-
 include/hw/pci/pcie_sriov.h |  13 ++--
 include/hw/qdev-core.h      |   4 --
 hw/core/qdev.c              |   1 -
 hw/net/igb.c                |  15 ++--
 hw/nvme/ctrl.c              |  54 +++++++-------
 hw/pci/pci.c                |  32 +++++----
 hw/pci/pci_host.c           |   4 +-
 hw/pci/pcie_sriov.c         | 170 ++++++++++++++++++++++++--------------------
 hw/vfio/pci.c               |   3 +-
 hw/xen/xen_pt_load_rom.c    |   2 +-
 system/qdev-monitor.c       |  12 ++--
 hw/pci/trace-events         |   2 +-
 15 files changed, 194 insertions(+), 150 deletions(-)
---
base-commit: 5005aed8a7e728d028efb40e243ecfc2b4f3df3a
change-id: 20240129-reuse-faae22b11934

Best regards,
-- 
Akihiko Odaki <akihiko.odaki@daynix.com>