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hw/pci-host: Allow extended config space access for Designware PCIe host 

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.chien@sifive.com>
Message-Id: <20230809102257.25121-1-jason.chien@sifive.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Signed-off-by: Jason Chien &lt;<a href="mailto:jason.chien@sifive.com" target="_blank">jason.chien@sifive.com</a>&gt;<br>
master
Jason Chien 2023-08-09 10:22:50 +00:00 committed by Michael S. Tsirkin
parent 15b11a1da6
commit 3d449bc603
1 changed files with 1 additions and 0 deletions
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1
hw/pci-host/designware.c
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@ -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),