linux-kernel - Re: [RFC PATCH 13/21] vfio/pci: Preserve VFIO PCI config space through live update

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Message-ID: <20251018145951.GA1034710.vipinsh@google.com>
Date: Sat, 18 Oct 2025 07:59:51 -0700
From: Vipin Sharma <vipinsh@...gle.com>
To: bhelgaas@...gle.com, alex.williamson@...hat.com,
	pasha.tatashin@...een.com, dmatlack@...gle.com, jgg@...pe.ca,
	graf@...zon.com
Cc: pratyush@...nel.org, gregkh@...uxfoundation.org, chrisl@...nel.org,
	rppt@...nel.org, skhawaja@...gle.com, parav@...dia.com,
	saeedm@...dia.com, kevin.tian@...el.com, jrhilke@...gle.com,
	david@...hat.com, jgowans@...zon.com, dwmw2@...radead.org,
	epetron@...zon.de, junaids@...gle.com, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, kvm@...r.kernel.org,
	linux-kselftest@...r.kernel.org
Subject: Re: [RFC PATCH 13/21] vfio/pci: Preserve VFIO PCI config space
 through live update

On 2025-10-17 17:07:05, Vipin Sharma wrote:
> --- a/drivers/vfio/pci/vfio_pci_priv.h
> +++ b/drivers/vfio/pci/vfio_pci_priv.h
> @@ -109,8 +109,13 @@ static inline bool vfio_pci_is_vga(struct pci_dev *pdev)
>  
>  #ifdef CONFIG_LIVEUPDATE
>  void vfio_pci_liveupdate_init(void);
> +int vfio_pci_liveupdate_restore_config(struct vfio_pci_core_device *vdev);
>  #else
>  static inline void vfio_pci_liveupdate_init(void) { }
> +int vfio_pci_liveupdate_restore_config(struct vfio_pci_core_device *vdev)

This should be static inline

> +{
> +	return -EINVAL;
> +}
>  #endif /* CONFIG_LIVEUPDATE */
>  
>  #endif
> -- 
> 2.51.0.858.gf9c4a03a3a-goog
>