From: Christophe Lombard <clombard@linux.vnet.ibm.com>

The PCIe extended configuration space on the device is not currently
accessible to the host. if by default,  it is still inaccessible for
conventional for PCIe buses, add the current flag
PCI_BUS_EXTENDED_CONFIG_SPACE on the root bus permits PCI-E extended
config space access.

Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20211109145053.43524-1-clombard@linux.vnet.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 hw/pci-host/pnv_phb4.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/pci-host/pnv_phb4.c b/hw/pci-host/pnv_phb4.c
index 5c375a9f285d..40b793201a34 100644
--- a/hw/pci-host/pnv_phb4.c
+++ b/hw/pci-host/pnv_phb4.c
@@ -1205,6 +1205,7 @@ static void pnv_phb4_realize(DeviceState *dev, Error **errp)
                                      &phb->pci_mmio, &phb->pci_io,
                                      0, 4, TYPE_PNV_PHB4_ROOT_BUS);
     pci_setup_iommu(pci->bus, pnv_phb4_dma_iommu, phb);
+    pci->bus->flags |= PCI_BUS_EXTENDED_CONFIG_SPACE;
 
     /* Add a single Root port */
     qdev_prop_set_uint8(DEVICE(&phb->root), "chassis", phb->chip_id);
-- 
2.31.1