Re: [Qemu-devel] [PATCH] pci: add default pci subsystem id for all devices.

[Carl-Daniel Hailfinger]

Hi,

On 11.12.2008 17:24, Gerd Hoffmann wrote:
> Has been a while since the last submission.  Meanwhile the ID allocation
> has been sorted and documented (see pci-ids.txt added by the patch), so
> I hope there are no outstanding issues any more.
>
> >From 2643e6a1314ae23e2d9757d782acc9f75bd22ece Mon Sep 17 00:00:00 2001
> From: Gerd Hoffmann <address@hidden>
> Date: Tue, 26 Aug 2008 12:34:42 +0200
> Subject: [PATCH] pci: add default pci subsystem id for all devices.
>
> This sets a default PCI subsystem ID for all emulated PCI devices.  PCI
> specs require this, so do it.
>   

I know of lots of recent x86 hardware where the subsystem IDs are not
set in hardware, but in the BIOS instead. That allows board vendors to
set their own subsystem IDs (usually for chipset devices) in the BIOS
even if the hardware is identical to that of other vendors.
And since the OS will never see the PCI devices without a valid
subsystem ID, I'd say setting the subsystem IDs in the BIOS is spec
compliant as well.

Have you investigated setting the subsystem IDs in the Qemu BIOS?

Regards,
Carl-Daniel

-- 
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