[Midnightbsd-cvs] [MidnightBSD/src] 582a09: bhyve(8): Add VM Generation Counter ACPI device

[Lucas Holt]

  Branch: refs/heads/master
  Home:   https://github.com/MidnightBSD/src
  Commit: 582a0940bec459c9bef6ce0237a1538249facc1f
      https://github.com/MidnightBSD/src/commit/582a0940bec459c9bef6ce0237a1538249facc1f
  Author: Lucas Holt <luke at foolishgames.com>
  Date:   2024-05-30 (Thu, 30 May 2024)

  Changed paths:
    M usr.sbin/bhyve/Makefile
    M usr.sbin/bhyve/acpi.c
    M usr.sbin/bhyve/acpi.h
    M usr.sbin/bhyve/bhyverun.c
    M usr.sbin/bhyve/pm.c
    A usr.sbin/bhyve/vmgenc.c
    A usr.sbin/bhyve/vmgenc.h

  Log Message:
  -----------
  bhyve(8): Add VM Generation Counter ACPI device
Add an implementatation of the 'Virtual Machine Generation ID' spec to
Bhyve.  The spec provides a randomly generated GUID (at bhyve start) in
device memory, along with an ACPI device with _CID VM_Gen_Counter and ADDR
evaluating to a Package pointing at that GUID.

A GPE is defined which Notifies the ACPI Device when the generation changes
(such as when a snapshot is rolled back).  At this time, Bhyve does not
support snapshotting, so the GPE is never actually raised.

Obtained from:FreeBSD 13



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