hw/vfio: Move the IGD quirk code to a separate file

The IGD quirk code defines a separate device, the so-called
"vfio-pci-igd-lpc-bridge" which shows up as a user-creatable
device in all QEMU binaries that include the vfio code. This
is a little bit unfortunate for two reasons: First, this device
is completely useless in binaries like qemu-system-s390x.
Second we also would like to disable it in downstream RHEL
which currently requires some extra patches there since the
device does not have a proper Kconfig-style switch yet.

So it would be good if the device could be disabled more easily,
thus let's move the code to a separate file instead and introduce
a proper Kconfig switch for it which gets only enabled by default
if we also have CONFIG_PC_PCI enabled.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h
index 35626cd63e..0da7a20a7e 100644
--- a/hw/vfio/pci.h
+++ b/hw/vfio/pci.h
@@ -172,6 +172,21 @@ typedef struct VFIOPCIDevice {
     Notifier irqchip_change_notifier;
 } VFIOPCIDevice;
 
+/* Use uin32_t for vendor & device so PCI_ANY_ID expands and cannot match hw */
+static inline bool vfio_pci_is(VFIOPCIDevice *vdev, uint32_t vendor, uint32_t device)
+{
+    return (vendor == PCI_ANY_ID || vendor == vdev->vendor_id) &&
+           (device == PCI_ANY_ID || device == vdev->device_id);
+}
+
+static inline bool vfio_is_vga(VFIOPCIDevice *vdev)
+{
+    PCIDevice *pdev = &vdev->pdev;
+    uint16_t class = pci_get_word(pdev->config + PCI_CLASS_DEVICE);
+
+    return class == PCI_CLASS_DISPLAY_VGA;
+}
+
 uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len);
 void vfio_pci_write_config(PCIDevice *pdev,
                            uint32_t addr, uint32_t val, int len);
@@ -189,6 +204,8 @@ void vfio_bar_quirk_finalize(VFIOPCIDevice *vdev, int nr);
 void vfio_setup_resetfn_quirk(VFIOPCIDevice *vdev);
 int vfio_add_virt_caps(VFIOPCIDevice *vdev, Error **errp);
 void vfio_quirk_reset(VFIOPCIDevice *vdev);
+VFIOQuirk *vfio_quirk_alloc(int nr_mem);
+void vfio_probe_igd_bar4_quirk(VFIOPCIDevice *vdev, int nr);
 
 extern const PropertyInfo qdev_prop_nv_gpudirect_clique;