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Re: [Qemu-devel] [PATCH 3/4] pci: add default pci subsystem id for all d
From: |
Gerd Hoffmann |
Subject: |
Re: [Qemu-devel] [PATCH 3/4] pci: add default pci subsystem id for all devices. |
Date: |
Wed, 10 Sep 2008 15:40:42 +0200 |
User-agent: |
Thunderbird 2.0.0.16 (X11/20080723) |
Paul Brook wrote:
> On Wednesday 10 September 2008, Gerd Hoffmann wrote:
>> +extern uint16_t pci_default_sub_vendor_id;
>> +extern uint16_t pci_default_sub_device_id;
>
> Why are these being exported?
So you can change the defaults. Main user for that I have in mind is
Xen. They have added a subsystem id (5853:0001, XenSource vendor ID) to
some of the devices (by patching the indiviudual drivers, not by adding
a global default like this patch does).
I expect they probably want to keep the XenSource subsystem ID instead
of going with the qemu default. So the idea is that we can have "if
(using_xen) { make 5853:0001 the default }" in the initialization path
some day.
cheers,
Gerd