From: Jason Chien <jason.ch...@sifive.com> In pcie_bus_realize(), a root bus is realized as a PCIe bus and a non-root bus is realized as a PCIe bus if its parent bus is a PCIe bus. However, the child bus "dw-pcie" is realized before the parent bus "pcie" which is the root PCIe bus. Thus, the extended configuration space is not accessible on "dw-pcie". The issue can be resolved by adding the PCI_BUS_EXTENDED_CONFIG_SPACE flag to "pcie" before "dw-pcie" is realized.
Signed-off-by: Jason Chien <jason.ch...@sifive.com> Message-Id: <20230809102257.25121-1-jason.ch...@sifive.com> Reviewed-by: Michael S. Tsirkin <m...@redhat.com> Signed-off-by: Michael S. Tsirkin <m...@redhat.com> Reviewed-by: Frank Chang <frank.ch...@sifive.com> Signed-off-by: Jason Chien <<a href="mailto:jason.ch...@sifive.com"; target="_blank">jason.ch...@sifive.com</a>><br> --- hw/pci-host/designware.c | 1 + 1 file changed, 1 insertion(+) diff --git a/hw/pci-host/designware.c b/hw/pci-host/designware.c index 9e183caa48..388d252ee2 100644 --- a/hw/pci-host/designware.c +++ b/hw/pci-host/designware.c @@ -694,6 +694,7 @@ static void designware_pcie_host_realize(DeviceState *dev, Error **errp) &s->pci.io, 0, 4, TYPE_PCIE_BUS); + pci->bus->flags |= PCI_BUS_EXTENDED_CONFIG_SPACE; memory_region_init(&s->pci.address_space_root, OBJECT(s), -- MST
