From: Xingang Wang <wangxinga...@huawei.com>
This property can be useful to check whether this bus is attached to iommu.
Signed-off-by: Xingang Wang <wangxinga...@huawei.com>
Signed-off-by: Jiahui Cen <cenjia...@huawei.com>
---
include/hw/pci/pci_bus.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/include/hw/pci/pci_bus.h b/include/hw/pci/pci_bus.h
index 347440d42c..42109e8a06 100644
--- a/include/hw/pci/pci_bus.h
+++ b/include/hw/pci/pci_bus.h
@@ -24,6 +24,8 @@ enum PCIBusFlags {
PCI_BUS_IS_ROOT = 0x0001,
/* PCIe extended configuration space is accessible on this bus */
PCI_BUS_EXTENDED_CONFIG_SPACE = 0x0002,
+ /* Iommu is enabled on this bus */
+ PCI_BUS_IOMMU = 0x0004,
};
struct PCIBus {
@@ -63,4 +65,15 @@ static inline bool
pci_bus_allows_extended_config_space(PCIBus *bus)
return !!(bus->flags & PCI_BUS_EXTENDED_CONFIG_SPACE);
}
+static inline bool pci_bus_has_iommu(PCIBus *bus)
+{
+ PCIBus *root_bus = bus;
+
+ while (root_bus && !pci_bus_is_root(root_bus)) {
+ root_bus = pci_get_bus(root_bus->parent_dev);
+ }
+
+ return !!(root_bus->flags & PCI_BUS_IOMMU);
+}
+
#endif /* QEMU_PCI_BUS_H */
--
2.19.1
