linux-kernel - [RFC] pvpanic notifications for non-panic reboot events

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Message-ID: <984794aa-4af0-4c68-a74e-7420ec3151a5@t-8ch.de>
Date:   Thu, 26 Oct 2023 20:50:17 +0000
From:   Thomas Weißschuh <thomas@...ch.de>
To:     qemu-devel@...gnu.org, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Subject: [RFC] pvpanic notifications for non-panic reboot events

Hi everybody,

the mechanism for a (Linux) guest to signal a regular shutdown event to
QEMU seems fairly architecture specific and dependent on kernel
configuration.

The existing pvpanic protocol [0] could be extended fairly easily to
also cover these events.

Any thoughts?

Thanks,
Thomas

[0] https://github.com/qemu/qemu/blob/master/docs/specs/pvpanic.txt