http://git.kernel.org/cgit/virt/kvm/qemu-kvm.git/plain/hw/ac97.c
the emulated ac97 emulate 82801AA (ICH)
static void ac97_class_init (ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS (klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS (klass);
k->init = ac97_initfn;
k->exit = ac97_exitfn;
k->vendor_id = PCI_VENDOR_ID_INTEL;
k->device_id = PCI_DEVICE_ID_INTEL_82801AA_5;
k->revision = 0x01;
k->class_id = PCI_CLASS_MULTIMEDIA_AUDIO;
the emulated HDA emulate 82801FB (ICH6)
http://git.kernel.org/cgit/virt/kvm/qemu-kvm.git/plain/hw/intel-hda.c
static void intel_hda_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->init = intel_hda_init;
k->exit = intel_hda_exit;
k->vendor_id = PCI_VENDOR_ID_INTEL;
k->device_id = 0x2668;
k->revision = 1;
k->class_id = PCI_CLASS_MULTIMEDIA_HD_AUDIO;
dc->desc = "Intel HD Audio Controller";
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https://bugs.launchpad.net/bugs/1246929
Title:
alsa bug in KVM virtual machines
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