Hi, Alex
It seems like we have a number of questions open in the thread with MST
from the previous version, particularly whether we should actually drop
the resume notifier and block the reset in the kernel. The concern
being that it's not very well specified what we can and cannot do
between the error interrupt and the resume interrupt. We'd probably
need some other indicate of whether the host has this capability,
perhaps a flag in vfio_device_info. Appreciate your opinions there.
Thanks,
Alex
Have you had a conclusion with MST?
How about the process like following?
1. Detect support for VFIO reset blocking.
Maybe use vfio_device_info.
2. Immediately notify the VM on error detected.
3. Invoke ioctl(VFIO_DEVICE_PCI_HOT_RESET).
If kernel is doing reset, then block in ioctl.
Can I ignore the resume notifier?
else
Shall ioctl block until after receiving resume notification?
Sincerely
Zhou Jie
