IDPF live-update support

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" summary

IDPF live-update work demonstrates a concrete approach: a prototype saves and later restores ring head/tail pointers for the IDPF firmware channel and explicitly avoids PF hardware reset so guest VFs survive a host kernel update. It relies on PCI to pass through config state, requires keeping SR-IOV enabled and re-creating VFs without full discovery, and currently works for basic VF preservation while PCI discovery, VF reprovisioning and robust error-recovery (reset vs panic) remain unresolved.

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" chapters (11)

1. 0:00Introduction to IDPF live update
2. 1:03Why live update for network drivers
3. 2:06State preservation in IDPF driver
4. 3:51Simplifying live update requirements
5. 5:19PCI subsystem role in live update
6. 7:26Challenges with PF and VF interaction
7. 9:12SR-IOV configuration complexity
8. 11:21User space vs kernel live update
9. 12:22Error handling in live update
10. 14:07Device reset and panic scenarios
11. 15:52Standardization efforts in drivers