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Re: [Qemu-devel] [PATCH RESEND] qdev: Make "hotplugged" property read-on
Re: [Qemu-devel] [PATCH RESEND] qdev: Make "hotplugged" property read-only
Mon, 27 Feb 2017 19:05:24 +0100
Gnus/5.13 (Gnus v5.13) Emacs/25.1 (gnu/linux)
Eduardo Habkost <address@hidden> writes:
> The "hotplugged" property is user visible, but it was never meant
> to be set by the user. There are probably multiple ways to break
> or crash device code by overriding the property. For example, we
> recently fixed a crash in rtc_set_memory() related to the
> property (commit 26ef65beab852caf2b1ef4976e3473f2d525164d).
> There has been some discussion about making management software
> use "hotplugged=on" on migration, to indicate devices that were
> hotplugged in the migration source. There were other suggestions
> to address this, like including the "hotplugged" field in the
> migration stream instead of requiring it to be set propertly.
> Whatever solution we choose in the future, this patch disables
> setting "hotplugged" explicitly in the command-line by now,
> because the ability to set the property is unused, untested, and
> Signed-off-by: Eduardo Habkost <address@hidden>
I figure this is the safe thing to do for 2.9.
Reviewed-by: Markus Armbruster <address@hidden>