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https://bugs.launchpad.net/bugs/1784331

Title:
  [18.10 FEAT] zcrypt DD: introduce APQN tags to support deterministic
  driver binding

Status in Ubuntu on IBM z Systems:
  Triaged
Status in linux package in Ubuntu:
  New

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.

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