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-rw-r--r--hw/pci-host/q35.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
index 966a7cf92d..71e4ca5eec 100644
--- a/hw/pci-host/q35.c
+++ b/hw/pci-host/q35.c
@@ -622,7 +622,15 @@ static void mch_class_init(ObjectClass *klass, void *data)
dc->desc = "Host bridge";
dc->vmsd = &vmstate_mch;
k->vendor_id = PCI_VENDOR_ID_INTEL;
- k->device_id = PCI_DEVICE_ID_INTEL_Q35_MCH;
+ /*
+ * The 'q35' machine type implements an Intel Series 3 chipset,
+ * of which there are several variants. The key difference between
+ * the 82P35 MCH ('p35') and 82Q35 GMCH ('q35') variants is that
+ * the latter has an integrated graphics adapter. QEMU does not
+ * implement integrated graphics, so uses the PCI ID for the 82P35
+ * chipset.
+ */
+ k->device_id = PCI_DEVICE_ID_INTEL_P35_MCH;
k->revision = MCH_HOST_BRIDGE_REVISION_DEFAULT;
k->class_id = PCI_CLASS_BRIDGE_HOST;
/*