From: Greg Kurz <gk...@linux.vnet.ibm.com>
Without presuming if we got there because of a user mistake or some
more subtle bug in the tooling, it really does not make sense to
implement a non-functional device.
Signed-off-by: Greg Kurz <gk...@linux.vnet.ibm.com>
Reviewed-by: Marcel Apfelbaum <mar...@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.h...@de.ibm.com>
Signed-off-by: Greg Kurz <gr...@kaod.org>
---
v5: - changed wording as suggested by Connie
- added Connies R-b tag
---
hw/virtio/virtio-pci.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index 755f9218b77d..8714123d61fd 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -1842,6 +1842,14 @@ static void virtio_pci_dc_realize(DeviceState *qdev,
Error **errp)
VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
PCIDevice *pci_dev = &proxy->pci_dev;
+ if (!(virtio_pci_modern(proxy) || virtio_pci_legacy(proxy))) {
+ error_setg(errp, "device cannot work as neither modern nor legacy mode"
+ " is enabled");
+ error_append_hint(errp, "Set either disable-modern or disable-legacy"
+ " to off\n");
+ return;
+ }
+
if (!(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_PCIE) &&
virtio_pci_modern(proxy)) {
pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
