[PATCH v17 00/14] hw/pci: SR-IOV related fixes and improvements

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

Supersedes: <20240714-rombar-v2-0-af1504ef55de@daynix.com>
("[PATCH v2 0/4] hw/pci: Convert rom_bar into OnOffAuto")

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 v17:
- Added patch "pcie_sriov: Ensure VF addr does not overflow".
- Changed not to link VF with sPAPR DRC.
- Asserted pci_is_vf() when zpci is not found. (Cédric Le Goater)
- Link to v16: https://lore.kernel.org/r/20240913-reuse-v16-0-d016b4b4f616@daynix.com

Changes in v16:
- Added patch "s390x/pci: Avoid creating zpci for VFs".
- Added patch "s390x/pci: Allow plugging SR-IOV devices".
- Link to v15: https://lore.kernel.org/r/20240823-reuse-v15-0-eddcb960e289@daynix.com

Changes in v15:
- Fixed variable shadowing in patch
  "pcie_sriov: Remove num_vfs from PCIESriovPF"
- Link to v14: https://lore.kernel.org/r/20240813-reuse-v14-0-4c15bc6ee0e6@daynix.com

Changes in v14:
- Dropped patch "pcie_sriov: Ensure VF function number does not
  overflow" as I found the restriction it imposes is unnecessary.
- Link to v13: https://lore.kernel.org/r/20240805-reuse-v13-0-aaeaa4d7dfd2@daynix.com

Changes in v13:
- Added patch "s390x/pci: Check for multifunction after device
  realization". I found SR-IOV devices, which are multifunction devices,
  are not supposed to work at all with s390x on QEMU.
- Link to v12: https://lore.kernel.org/r/20240804-reuse-v12-0-d3930c4111b2@daynix.com

Changes in v12:
- Changed to ignore invalid PCI_SRIOV_NUM_VF writes as done for
  PCI_SRIOV_CTRL_VFE.
- Updated the message for patch "hw/pci: Use -1 as the default value for
  rombar". (Markus Armbruster)
- Link to v11: https://lore.kernel.org/r/20240802-reuse-v11-0-fb83bb8c19fb@daynix.com

Changes in v11:
- Rebased.
- Dropped patch "hw/pci: Convert rom_bar into OnOffAuto".
- Added patch "hw/pci: Use -1 as the default value for rombar".
- Added for-9.2 to give a testing period for possible breakage with
  libvirt/s390x.
- Link to v10: https://lore.kernel.org/r/20240627-reuse-v10-0-7ca0b8ed3d9f@daynix.com

Changes in v10:
- Added patch "hw/ppc/spapr_pci: Do not reject VFs created after a PF".
- Added patch "hw/ppc/spapr_pci: Do not create DT for disabled PCI device".
- Added patch "hw/pci: Convert rom_bar into OnOffAuto".
- Dropped patch "hw/pci: Determine if rombar is explicitly enabled".
- Dropped patch "hw/qdev: Remove opts member".
- Link to v9: https://lore.kernel.org/r/20240315-reuse-v9-0-67aa69af4d53@daynix.com

Changes in v9:
- Rebased.
- Restored '#include "qapi/error.h"' (Michael S. Tsirkin)
- Added patch "pcie_sriov: Ensure VF function number does not overflow"
  to fix abortion with wrong PF addr.
- Link to v8: https://lore.kernel.org/r/20240228-reuse-v8-0-282660281e60@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 (14):
      hw/pci: Rename has_power to enabled
      hw/ppc/spapr_pci: Do not create DT for disabled PCI device
      hw/ppc/spapr_pci: Do not reject VFs created after a PF
      s390x/pci: Avoid creating zpci for VFs
      s390x/pci: Allow plugging SR-IOV devices
      s390x/pci: Check for multifunction after device realization
      pcie_sriov: Do not manually unrealize
      pcie_sriov: Ensure VF addr does not overflow
      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: Use -1 as the default value for rombar
      hw/qdev: Remove opts member

 docs/pcie_sriov.txt         |   8 ++-
 include/hw/pci/pci.h        |   2 +-
 include/hw/pci/pci_device.h |  19 +++++-
 include/hw/pci/pcie_sriov.h |   9 +--
 include/hw/qdev-core.h      |   4 --
 hw/core/qdev.c              |   1 -
 hw/net/igb.c                |  10 ++-
 hw/nvme/ctrl.c              |  22 +++---
 hw/pci/pci.c                |  23 ++++---
 hw/pci/pci_host.c           |   4 +-
 hw/pci/pcie_sriov.c         | 159 ++++++++++++++++++++++++--------------------
 hw/ppc/spapr_pci.c          |  18 +++--
 hw/s390x/s390-pci-bus.c     |  42 +++++++++---
 hw/vfio/pci.c               |   5 +-
 system/qdev-monitor.c       |  12 ++--
 hw/pci/trace-events         |   2 +-
 16 files changed, 207 insertions(+), 133 deletions(-)
---
base-commit: 7e3b6d8063f245d27eecce5aabe624b5785f2a77
change-id: 20240129-reuse-faae22b11934

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