** Tags added: intel-bug-december-2021

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https://bugs.launchpad.net/bugs/1954474

Title:
  KVM notify VM Exit

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  A VMM can enable notification VM exits to occur if no interrupt
  windows occur in VMX non-root operation for a specified amount of time
  (notify window).


  KVM Enabling:

  enable bit 31 of secondary processor-based excution control.
  enable notification VM exit (exit reason 75) handler.
  expose a module param to configure notify window and disable/enable VM notify.

  Target Linux 5.17

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