[RFC PATCH 0/4] vmclock: add support for VM generation counter and notifications

["Chalios, Babis" <bchalios@amazon.es>]

Latest specification of VMClock[1] adds support for VM generation counter
and notifications. VM generation counter is similar to disruption_marker
but it only changes when the guest has been loaded from a snapshot, not
on live migration. Its purpose is to notify the guest about snapshot
events and let it perform actions such as recreating UUIDs, resetting
network connections, reseeding entropy, etc.

Moreover, the spec now describes a notification that the device can send
after updating the seq counter to a new even number.

I have already sent the Linux changes to the mailing list here:
https://lore.kernel.org/lkml/20251127103159.19816-1-bchalios@amazon.es/T/#u

[1] https://david.woodhou.se/VMClock.pdf

Babis Chalios (4):
  acpi: fix acpi_send_gpe_event() to handle more events
  hw/acpi: add new fields in VMClock ABI
  hw/acpi: add VM generation counter field to VMClock
  hw/acpi: add ACPI notification to VMClock device

 hw/acpi/core.c                               |  8 +++++-
 hw/acpi/vmclock.c                            | 28 +++++++++++++++++++-
 include/hw/acpi/acpi_dev_interface.h         |  1 +
 include/standard-headers/linux/vmclock-abi.h | 20 ++++++++++++++
 4 files changed, 55 insertions(+), 2 deletions(-)

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2.34.1