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

[Michael S. Tsirkin]

On Wed, Feb 28, 2024 at 08:33:11PM +0900, Akihiko Odaki wrote:
> 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.


I picked 1-6 the rest will have to go in after release.

> [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>