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Re: [Qemu-devel] [PATCH v2] Sort the fw_cfg file list

From: Corey Minyard
Subject: Re: [Qemu-devel] [PATCH v2] Sort the fw_cfg file list
Date: Wed, 16 Mar 2016 10:21:07 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0

On 03/15/2016 12:01 PM, Michael S. Tsirkin wrote:
On Tue, Mar 15, 2016 at 11:36:39AM -0500, Corey Minyard wrote:

I've hit a bit of a snag here.  For 0.11 and before, PCI option ROMs
were loaded via fw_cfg, not in the PCI ROM BAR.  This causes two

* The order depends on the device initialization order,
which I'm not sure is quantifiable.  I believe it depends on
how they are listed on the command line.

* Users can load their own romfile with their own name, which
means it can't be in the list.

Also, for the ISA VGA ROMs, their order will also depend on the
device list order.

Outside of that, I have an order of file names.

I think if I treat the device ROMs separately and handle them
in init order, and then stick that device list in the proper location,
that will work.  Does that sound reasonable?


I think so. By the time this becomes an issue we might decide to
disable migration from 0.11

One more thing here.  I've realized that this is used for
non-x86, too, and I'm wondering how much those matter.
It's going to be really hard to figure out an order for these,
as different boards/arches use the same names and install
them in different orders.

For legacy mode, can I just put them in order for non-x86?
Is there an easy way to detect that you are running x86?


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