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Date: Mon, 07 Nov 2011 10:25:24 +0100
From: Gerd Hoffmann <kraxel@redhat.com>
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Subject: Re: [Qemu-devel] Wierd hack to sound/pci/intel8x0.c
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To: Takashi Iwai <tiwai@suse.de>
Cc: alsa-devel@alsa-project.org, Konstantin Ozerkov <kozerkov@parallels.com>, KVM list <kvm@vger.kernel.org>, "Denis V. Lunev" <den@parallels.com>, qemu-devel <qemu-devel@nongnu.org>, Avi Kivity <avi@redhat.com>, "Denis V. Lunev" <den@openvz.org>, Linus Torvalds <torvalds@linux-foundation.org>

  Hi,

> Agreed.  If we can know the virtual device for KVM in a better way
> (e.g. any specific PCI SSID or such), we can narrow the condition more
> safely.

PCI Subsystem ID 1af4:1100 is qemu/kvm (not only Intel HDA, most other
emulated pci devices have it too). Complete entry:

00:04.0 0403: 8086:2668 (rev 01)
        Subsystem: 1af4:1100
        Physical Slot: 4
        Flags: bus master, fast devsel, latency 0, IRQ 11
        Memory at e2030000 (32-bit, non-prefetchable) [size=16K]
        Kernel driver in use: HDA Intel
        Kernel modules: snd-hda-intel

cheers,
  Gerd