[Intel-gfx] [PATCH v5 09/19] vfio/pci: Allow passing zero-length fd array in VFIO_DEVICE_PCI_HOT_RESET

Jason Gunthorpe jgg at nvidia.com
Wed Mar 8 15:08:16 UTC 2023


On Wed, Mar 08, 2023 at 07:26:08AM +0000, Tian, Kevin wrote:
>  * Userspace requests hot reset for the devices it uses.  Due to the
>  * underlying topology, multiple devices can be affected in the reset
>  * while some might be opened by another user. To avoid interference
>  * the calling user must ensure all affected devices, if opened, are
>  * owned by itself.
>  *
>  * The ownership can be proved in three ways:
>  *   - An array of group fds
>  *   - An array of device fds
>  *   - A zero-length array
>  *
>  * In the last case all affected devices which are opened by this user must
>  * have been bound to a same iommufd_ctx.
> 
> and with this change let's rename 'group_fds'  to 'fds'

Looks right

Jason


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