Re: [PATCH v10 00/13] PCI: liveupdate: PCI core support for Live Update

[David Matlack <dmatlack@google.com>]

On 2026-11-04 01:00 PM, Pasha Tatashin wrote:
> On 10-13 16:25, David Matlack wrote:
> > v10:
> >  - Save and restore the ACS Egress Control Vector along with the ACS
> >    Control register, sizing the save buffer from the HwInit Egress
> >    Control Vector Size field (Alex) and drop Bjorn's R-b tag
> >  - Make CONFIG_PCI_LIVEUPDATE depend on 64BIT from the first patch
> >    rather than adding the dependency later in the series (Pratyush,
> >    Mike)
> >  - Reword kernel-doc comments to read better in the HTML docs and
> >    spell out "reference count" (Mike)
> >  - Replace the version number at the start of struct pci_ser with
> >    required_flags and optional_flags, and record the size of struct
> >    pci_dev_ser, so that the PCI FLB ABI can be extended (LPC BoF)
> 
> Hi Bjorn,
> 
> I am planning to target this series for the 7.5 merge window through the 
> liveupdate tree, as we previously agreed. However, there are still 6 
> patches that lack an Acked-by from you. I believe you might have 
> reviewed some of them before, but the tags were lost during subsequent 
> refactoring. Could you please take another look at the following to make 
> sure everything is in order for us to merge the series:
> 
> PCI: liveupdate: Set up FLB handler for the PCI core
> PCI: liveupdate: Track incoming preserved PCI devices
> PCI: liveupdate: Document driver binding responsibilities
> PCI: liveupdate: Auto-preserve upstream bridges across Live Update
> PCI: Save and restore the ACS Control register and Egress Control Vector
> PCI: liveupdate: Adopt ACS controls in incoming preserved devices

Thanks Pasha. One more for Bjorn's list:

  [06/13] PCI: liveupdate: Preserve bus numbers during Live Update
          https://lore.kernel.org/linux-pci/20261013162529.1928093-7-dmatlack@google.com/

Bjorn's Reviewed-by on it was dropped in v9 when it changed materially
(albeit based on his feedback).

Alex, could you also take a look at the two ACS patches? 08 includes the
Egress Control Vector save/restore you asked for in v9.

  [08/13] PCI: Save and restore the ACS Control register and Egress Control Vector
          https://lore.kernel.org/linux-pci/20261013162529.1928093-9-dmatlack@google.com/
  [09/13] PCI: liveupdate: Adopt ACS controls in incoming preserved devices
          https://lore.kernel.org/linux-pci/20261013162529.1928093-10-dmatlack@google.com/