Re: [Intel-gfx] [PATCH v7 0/9] Enhance vfio PCI hot reset for vfio cdev device

Jiang, Yanting
2023-06-08T06:59:50Z

> Subject: [PATCH v7 0/9] Enhance vfio PCI hot reset for vfio cdev device
>
> VFIO_DEVICE_PCI_HOT_RESET requires user to pass an array of group fds to
> prove that it owns all devices affected by resetting the calling device. While for
> cdev devices, user can use an iommufd-based ownership checking model and
> invoke VFIO_DEVICE_PCI_HOT_RESET with a zero-length fd array.
>
> This series extends VFIO_DEVICE_GET_PCI_HOT_RESET_INFO to check
> ownership and return the check result and the devid of affected devices to user.
> In the end, extends the VFIO_DEVICE_PCI_HOT_RESET to accept zero-length fd
> array for hot-reset with cdev devices.
>
> The new hot reset method and updated _INFO ioctl are tested with the below
> qemu:
>
> https://github.com/yiliu1765/qemu/tree/iommufd_rfcv4.mig.reset.v4_var3
> (requires to test with the cdev kernel)
>

Tested NIC passthrough on Intel platform.
Result looks good hence,
Tested-by: Yanting Jiang <yanting.jiang@intel.com>

Thanks,
Yanting