It's possible to create non-working configurations by attaching a device to a derivative of PCIe slot (pcie-root-port, ioh3420, etc) and specifying a slot number other that zero, e.g.:
-device pcie-root-port,id=s0,... \ -device virtio-blk-pci,bus=s0,addr=4,... Make QEMU reject such configurations and only allow addr=0 on the secondary bus of a PCIe slot. Signed-off-by: Roman Kagan <rvka...@yandex-team.ru> --- hw/pci/pci_bridge.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/hw/pci/pci_bridge.c b/hw/pci/pci_bridge.c index da34c8ebcd..8b38d5ad3d 100644 --- a/hw/pci/pci_bridge.c +++ b/hw/pci/pci_bridge.c @@ -33,6 +33,7 @@ #include "qemu/units.h" #include "hw/pci/pci_bridge.h" #include "hw/pci/pci_bus.h" +#include "hw/pci/pcie_port.h" #include "qemu/module.h" #include "qemu/range.h" #include "qapi/error.h" @@ -386,6 +387,10 @@ void pci_bridge_initfn(PCIDevice *dev, const char *typename) br->windows = pci_bridge_region_init(br); QLIST_INIT(&sec_bus->child); QLIST_INSERT_HEAD(&parent->child, sec_bus, sibling); + + if (PCIE_SLOT(dev)) { + sec_bus->slot_reserved_mask = ~1u; + } } /* default qdev clean up function for PCI-to-PCI bridge */ -- 2.36.1