qemu_2.2.50_DEVID.patch

--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -218,6 +218,10 @@ typedef struct VFIODevice {
 #define VFIO_FEATURE_ENABLE_VGA_BIT 0
 #define VFIO_FEATURE_ENABLE_VGA (1 << VFIO_FEATURE_ENABLE_VGA_BIT)
     int32_t bootindex;
+    uint16_t virtual_vendor_id;
+    uint16_t virtual_device_id;
+    uint16_t virtual_ss_vendor_id;
+    uint16_t virtual_ss_device_id;
     uint8_t pm_cap;
     bool reset_works;
     bool has_vga;
@@ -4262,6 +4266,23 @@ static int vfio_initfn(PCIDevice *pdev)
     memset(&vdev->pdev.config[PCI_BASE_ADDRESS_0], 0, 24);
     memset(&vdev->pdev.config[PCI_ROM_ADDRESS], 0, 4);

+    if (vdev->virtual_vendor_id != 0xFFFF) {
+        vfio_add_emulated_word(vdev, PCI_VENDOR_ID,
+                               cpu_to_le16(vdev->virtual_vendor_id), 0xFFFF);
+    }
+    if (vdev->virtual_device_id != 0xFFFF) {
+        vfio_add_emulated_word(vdev, PCI_DEVICE_ID,
+                               cpu_to_le16(vdev->virtual_device_id), 0xFFFF);
+    }
+    if (vdev->virtual_ss_vendor_id != 0xFFFF) {
+        vfio_add_emulated_word(vdev, PCI_SUBSYSTEM_VENDOR_ID,
+                               cpu_to_le16(vdev->virtual_ss_vendor_id), 0xFFFF);
+    }
+    if (vdev->virtual_ss_device_id != 0xFFFF) {
+        vfio_add_emulated_word(vdev, PCI_SUBSYSTEM_ID,
+                               cpu_to_le16(vdev->virtual_ss_device_id), 0xFFFF);
+    }
+
     vfio_pci_size_rom(vdev);

     ret = vfio_early_setup_msix(vdev);
@@ -4381,6 +4402,10 @@ static Property vfio_pci_dev_properties[] = {
                        intx.mmap_timeout, 1100),
     DEFINE_PROP_BIT("x-vga", VFIOPCIDevice, features,
                     VFIO_FEATURE_ENABLE_VGA_BIT, false),
+    DEFINE_PROP_UINT16("x-vid", VFIOPCIDevice, virtual_vendor_id, 0xFFFF),
+    DEFINE_PROP_UINT16("x-did", VFIOPCIDevice, virtual_device_id, 0xFFFF),
+    DEFINE_PROP_UINT16("x-ss-vid", VFIOPCIDevice, virtual_ss_vendor_id, 0xFFFF),
+    DEFINE_PROP_UINT16("x-ss-did", VFIOPCIDevice, virtual_ss_device_id, 0xFFFF),
     DEFINE_PROP_INT32("bootindex", VFIOPCIDevice, bootindex, -1),