mbox series

[v2,0/4] Add a new -action parameter

Message ID 1607536336-24701-1-git-send-email-alejandro.j.jimenez@oracle.com
Headers show
Series Add a new -action parameter | expand

Message

Alejandro Jimenez Dec. 9, 2020, 5:52 p.m. UTC 
v2:
- Replaced the individual qmp commands in patch 3/4 for a generic set-action
command that takes a RunStateAction parameter, specifying an event|action pair.
- Removed qmp_ prefix from X_set_action() functions in runstate-action.c

***

This is a follow up to the proposal to add a "-no-panicstop" option to QEMU that would allow us to
control whether the VM is paused or allowed to continue running without intervention from a management layer
when a guest panic occurs. See the inital thread and replies for details:

https://lore.kernel.org/qemu-devel/1601606494-1154-1-git-send-email-alejandro.j.jimenez@oracle.com/

From that discussion came a request for a generic mechanism to group options like -no-shutdown, -no-reboot, etc,
that specify an action taken by QEMU in response to a guest event (reboot, shutdown, panic, and watchdog
expiration are the current options). The existing options would translate to the new option, like:

* -no-reboot --> "-action reboot=shutdown"
* -no-shutdown --> "-action shutdown=pause"

Please share any questions or comments.

Regards,
Alejandro

Alejandro Jimenez (4):
  vl: Add an -action option to respond to guest events
  vl: Add option to avoid stopping VM upon guest panic
  qmp: Allow setting -action parameters on the fly
  qtest/pvpanic: Test panic option that allows VM to continue

 MAINTAINERS                      |   2 +
 include/sysemu/runstate-action.h |  16 ++++
 include/sysemu/sysemu.h          |   2 +
 qapi/run-state.json              | 135 +++++++++++++++++++++++++++++
 qemu-options.hx                  |  25 ++++++
 softmmu/meson.build              |   1 +
 softmmu/runstate-action.c        | 182 +++++++++++++++++++++++++++++++++++++++
 softmmu/vl.c                     |  44 +++++++++-
 tests/qtest/pvpanic-test.c       |  26 +++++-
 9 files changed, 428 insertions(+), 5 deletions(-)
 create mode 100644 include/sysemu/runstate-action.h
 create mode 100644 softmmu/runstate-action.c