See commit acead54c78 ("riscv: virt: Allow PCI address 0")
all RISCV Virt machines set this flag.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/riscv/virt.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 2feb851f15..4e1ce3a423 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -1156,6 +1156,8 @@ static inline DeviceState *gpex_pcie_init(MemoryRegion *sys_mem,
                             pio_base, NULL);
     object_property_set_int(OBJECT(dev), PCI_HOST_PIO_SIZE,
                             pio_size, NULL);
+    object_property_set_bool(OBJECT(dev), "allow-io-addr0-accesses",
+                             true, &error_fatal);
 
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
@@ -1803,7 +1805,6 @@ static void virt_machine_class_init(ObjectClass *oc, void *data)
     mc->default_cpu_type = TYPE_RISCV_CPU_BASE;
     mc->block_default_type = IF_VIRTIO;
     mc->no_cdrom = 1;
-    mc->pci_allow_0_address = true;
     mc->possible_cpu_arch_ids = riscv_numa_possible_cpu_arch_ids;
     mc->cpu_index_to_instance_props = riscv_numa_cpu_index_to_props;
     mc->get_default_cpu_node_id = riscv_numa_get_default_cpu_node_id;
-- 
2.45.2