[Qemu-devel] [PATCH] pci/pcie: make pci_find_device() ARI aware.

[Isaku Yamahata]

make pci_find_device() ARI aware.

Signed-off-by: Isaku Yamahata <address@hidden>
---
 hw/pci.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/hw/pci.c b/hw/pci.c
index 8d0e3df..851f350 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -1596,11 +1596,18 @@ PCIBus *pci_find_bus(PCIBus *bus, int bus_num)
 
 PCIDevice *pci_find_device(PCIBus *bus, int bus_num, int slot, int function)
 {
+    PCIDevice *d;
     bus = pci_find_bus(bus, bus_num);
 
     if (!bus)
         return NULL;
 
+    d = bus->parent_dev;
+    if (d && pci_is_express(d) &&
+        pcie_cap_get_type(d) == PCI_EXP_TYPE_DOWNSTREAM &&
+        !pcie_cap_is_ari_enabled(d) && slot > 0) {
+        return NULL;
+    }
     return bus->devices[PCI_DEVFN(slot, function)];
 }
 
-- 
1.7.1.1