Re: [PATCH v9 03/13] PCI: liveupdate: Track incoming preserved PCI devices

[Mike Rapoport <rppt@kernel.org>]

Hi David,

On Fri, Sep 18, 2026 at 08:06:29PM +0000, David Matlack wrote:
> During PCI enumeration, the previous kernel might have passed state about
> devices that were preserved across kexec. The PCI core needs to fetch
> this state to identify which devices are "incoming" and require special
> handling.
> 
> Add pci_liveupdate_setup_device() which is called during device setup
> to fetch the serialized state (struct pci_ser) from the Live Update
> Orchestrator. The first time this happens, pci_flb_retrieve() will run
> and convert the array of pci_dev_ser structs into an xarray so that it
> can be looked up efficiently.

...

> diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
> index 3781e2b5f095..8af20f558086 100644
> --- a/drivers/pci/Kconfig
> +++ b/drivers/pci/Kconfig
> @@ -273,7 +273,7 @@ config VGA_ARB_MAX_GPUS
>  
>  config PCI_LIVEUPDATE
>  	bool "PCI Live Update Support"
> -	depends on PCI && LIVEUPDATE
> +	depends on PCI && LIVEUPDATE && 64BIT

This could have been there from the first patch, no? :)

>  	help
>  	  Enable PCI core support for preserving PCI devices across Live
>  	  Update. This, in combination with support in a device's driver,

-- 
Sincerely yours,
Mike.