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[Qemu-devel] Re: [PATCH 0/3]: Add UUID command-line option

From: Anthony Liguori
Subject: [Qemu-devel] Re: [PATCH 0/3]: Add UUID command-line option
Date: Tue, 29 Jul 2008 14:22:54 -0500
User-agent: Thunderbird (X11/20080501)

Gleb Natapov wrote:
On Mon, Jul 28, 2008 at 09:37:01AM -0500, Anthony Liguori wrote:
The backdoor interface is deprecated (from a VMware perspective) and is pretty terrible. I'll go through and do a more thorough review of the patches Chris posted but one thing I already know I'd like to see the
Review my last submission I linked above then too.

Applying the -uuid support without making use of that uuid anywhere isn't very useful.

UUID plumbed through the SMBIOS tables for x86. That's a requirement in my mind for adding a -uuid option. I see no harm in also supporting the backdoor interface but the primary way to expose a UUID should be SMBIOS.
I am not sure I understand what you mean. Currently SMBIOS tables are
built by bochs bios and UUID backdoor is needed to fill in missing info.

But that patch that got pushed into the Bochs BIOS was wrong.

So here's what I'd like to see in order to apply these patches:

1) A new patch to the Bochs BIOS that used CMOS to pass a UUID (or possibly an OF data structure as Blue Swirl suggested--although CMOS is safer).
2) The patches updated to work with this new interface.

We should only support the VMware backdoor interface when it lets us reuse existing third-party code. We should not be creating new guest code (or BIOS code) that makes use of the backdoor interface.


Anthony Liguori


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