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Re: [DISCUSSION] Allow ACPI default OEM ID and OEM table ID fields to be

From: Michael S. Tsirkin
Subject: Re: [DISCUSSION] Allow ACPI default OEM ID and OEM table ID fields to be set.
Date: Wed, 25 Nov 2020 11:04:55 -0500

On Wed, Nov 25, 2020 at 01:32:51PM +0000, Richard W.M. Jones wrote:
> On Wed, Nov 25, 2020 at 02:27:11PM +0100, Antoine Damhet wrote:
> > Hello,
> > 
> > We recently found out that some softwares are effectively crashing
> > when they detect qemu's `OEM ID` or `OEM table ID` in the ACPI tables.
> > 
> > I see no reason not to expose the setting to the user/command-line. A
> > previous patch has been submitted in 2015[1] but did not get through
> > because (if I understand correctly) using the IDs on the `SLIC`, `BXPC`
> > and `RSDT` tables were enough at the time.
> > 
> > If you agree, I am willing to forward port the patches of M. Jones but I
> > need to ask how it would work `Signed-Off`-wise ?
> On this point, the patch I sent was actually written by
> Michael Tokarev, I was only trying to get them upstream.
> Rich.

I think at least one of the issues is that e.g. UEFI at least
seems to assume unique OEM table IDs e.g. for SSDTs.

So let's try to be more specific please, which software
crashes, what does it want to see and in which table.

> > Thanks in advance for your time,
> > 
> > PS: the softwares will crash if the signature is found in any of the
> >     exposed tables.
> > 
> > [1]: 
> > https://lore.kernel.org/qemu-devel/1441220618-4750-1-git-send-email-rjones@redhat.com/
> > 
> > -- 
> > Antoine 'xdbob' Damhet
> -- 
> Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
> Read my programming and virtualization blog: http://rwmj.wordpress.com
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