[18.10 FEAT] zcrypt DD: introduce APQN tags to support deterministic driver binding
Bug #1784331 reported by bugproxy
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| Ubuntu on IBM z Systems |
Fix Released |
High |
Canonical Kernel Team | ||
| linux (Ubuntu) |
Fix Released |
Medium |
Seth Forshee | ||
Bug Description
With the introduction of KVM crypto virtualization the driver bound to an AP queue device is no longer unique determined.
This feature provides a deterministic hot plugging semantics of AP queues that may be bound to multiple drivers.
In particular it enables to configure an AP queue (APQN) as being bound to a particular driver even if the associate HW gets intermittently lost and reconnected.
Is planned as part of kernel 4.19. Therefore a backport to kernel 4.18 will be required.