[Qemu-devel] [PATCH 0/2] ipmi: Allow UUID to be set for a BMC

[minyard]

The code was using the qemu UUID for the BMC.  But that's really
not a good method.  In general, you don't want the GUID to change
when you migrate, and you want the GUID to be the same between
invocations of qemu (if you have a GUID).

Plus, if you have multiple BMCs, they need to have different
GUIDs or the host code cannot tell them apart.  I'm not sure
anyone really uses multiple BMCs, but I do a lot of testing
with that scenario.

This change lets the user set the GUID on the command line, and
if the GUID is not set return an error for the GUID fetch command.
This maps better to how IPMI should work.

This change relies on the UUID being set to all zeros to know that
it is not set.  This is not optimal, perhaps, but an all zero
UUID isn't valid (it's the Nil UUID), so it should be ok.