Shutdown requests are normally hardware dependent.
By extending pvpanic to also handle shutdown requests, guests can
submit such requests with an easily implementable and cross-platform
mechanism.
The background is the usage of minimal Linux kernels with different
architectures for testing purposes.
Poweroff support varies highly per architecture and requires a bunch of
code to be compiled to work.
pvpanic on the other hand is very small and uniform.
Patch 1, 2 and 3 are general cleanups, which seem useful even without this
proposal being implemented.
They should also be ready to be picked up from the series on their own.
A corresponding patch has been submitted for Linux [0].
This is also where the request was voiced to drop move away from a
pvpanic uapi header in Linux.
[0] https://lore.kernel.org/lkml/20231104-pvpanic-shutdown-v1-1-5ee7c9b3e301@weissschuh.net/
Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
---
Changes in v6:
- Replace magic constant "4" in tests with PVPANIC_SHUTDOWN
- Link to v5: https://lore.kernel.org/r/20240129-pvpanic-shutdown-v5-0-f5a060b87c74@t-8ch.de
Changes in v5:
- Add patch from Alejandro to emit a QMP event.
- Update cover letter.
- Add tests.
- Link to v4: https://lore.kernel.org/r/20240107-pvpanic-shutdown-v4-0-81500a7e4081@t-8ch.de
Changes in v4:
- Rebase on 8.2 master
- Resend after tree reopened and holidays
- Link to v3: https://lore.kernel.org/r/20231129-pvpanic-shutdown-v3-0-c9a2892fc523@t-8ch.de
Changes in v3:
- Drop from Linux imported pvpanic header as discussed with Cornelia and
requested by Greg
- Link to v2: https://lore.kernel.org/r/20231128-pvpanic-shutdown-v2-0-830393b45cb6@t-8ch.de
Changes in v2:
- Remove RFC status
- Add Ack from Thomas to 2nd patch
- Fix typo in title of 2nd patch
- Link to v1: https://lore.kernel.org/r/20231104-pvpanic-shutdown-v1-0-02353157891b@t-8ch.de
---
Alejandro Jimenez (1):
pvpanic: Emit GUEST_PVSHUTDOWN QMP event on pvpanic shutdown signal
Thomas Weißschuh (5):
linux-headers: drop pvpanic.h
hw/misc/pvpanic: centralize definition of supported events
tests/qtest/pvpanic: use centralized definition of supported events
hw/misc/pvpanic: add support for normal shutdowns
tests/qtest/pvpanic: add tests for pvshutdown event
docs/specs/pvpanic.rst | 2 ++
hw/misc/pvpanic-isa.c | 3 +--
hw/misc/pvpanic-pci.c | 3 +--
hw/misc/pvpanic.c | 8 ++++--
include/hw/misc/pvpanic.h | 5 ++++
include/standard-headers/linux/pvpanic.h | 9 -------
include/sysemu/runstate.h | 1 +
qapi/run-state.json | 14 ++++++++++
scripts/update-linux-headers.sh | 3 +--
system/runstate.c | 6 +++++
tests/qtest/pvpanic-pci-test.c | 44 ++++++++++++++++++++++++++++++--
tests/qtest/pvpanic-test.c | 34 ++++++++++++++++++++++--
12 files changed, 111 insertions(+), 21 deletions(-)
---
base-commit: 9e34f127f419b3941b36dfdfac79640dc81e97e2
change-id: 20231104-pvpanic-shutdown-02e4b4cb4949
Best regards,
--
Thomas Weißschuh <thomas@t-8ch.de>