Re: [PATCH v2 5/5] vfio/pci: Latch all module parameters per device

[fengchengwen <fengchengwen@huawei.com>]

On 6/12/2026 5:35 AM, Alex Williamson wrote:
> The vfio-pci module parameters of disable_idle_d3, nointxmask, and
> disable_vga latch vfio-pci policy into vfio-pci-core globals each time
> the vfio-pci module is initialized.  The disable_idle_d3 parameter has
> already migrated to a per-device flag in order to provide consistency
> for refcounted PM operations for the lifetime of the device
> registration.
> 
> Pull the remaining vfio-pci module-parameter policy out of vfio-pci-core
> into per-device flags set at device initialization.
> 
> This also restores the mutable aspect of the disable_idle_d3 and
> nointxmask module parameters for vfio-pci, with the caveat that the
> parameters are latched into the device at probe.
> 
> A notable change for variant drivers is that their devices are no longer
> affected by vfio-pci module parameters and those drivers may need to
> adopt similar module parameters if any devices have a hidden dependency
> on vfio-pci setting non-default policy.
> 
> Assisted-by: Claude:claude-opus-4-8
> Signed-off-by: Alex Williamson <alex.williamson@nvidia.com>

Acked-by: Chengwen Feng <fengchengwen@huawei.com>

Since this change will affect our TPH feature, it would be great to get
this merged promptly. We plan to send the updated TPH patchset based on
this work.