From: Wang Xingang <wangxingang5@huawei.com>
To: <qemu-devel@nongnu.org>
Cc: xieyingtai@huawei.com, peter.maydell@linaro.org,
cenjiahui@huawei.com, wangxingang5@huawei.com, mst@redhat.com,
shannon.zhaosl@gmail.com, qemu-arm@nongnu.org,
imammedo@redhat.com
Subject: [RFC PATCH 1/4] pci: Add PCI_BUS_IOMMU property
Date: Fri, 26 Feb 2021 08:49:10 +0000 [thread overview]
Message-ID: <1614329353-2124-2-git-send-email-wangxingang5@huawei.com> (raw)
In-Reply-To: <1614329353-2124-1-git-send-email-wangxingang5@huawei.com>
From: Xingang Wang <wangxingang5@huawei.com>
This property can be useful to check whether this bus is attached to iommu.
Signed-off-by: Xingang Wang <wangxingang5@huawei.com>
Signed-off-by: Jiahui Cen <cenjiahui@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
next prev parent reply other threads:[~2021-02-26 8:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-26 8:49 [RFC PATCH 0/4] hw/arm/virt-acpi-build: Introduce iommu option for pci root bus Wang Xingang
2021-02-26 8:49 ` Wang Xingang [this message]
2021-02-26 8:49 ` [RFC PATCH 2/4] hw/pci: Add " Wang Xingang
2021-02-26 8:49 ` [RFC PATCH 3/4] hw/pci: Add pci_root_bus_max_bus Wang Xingang
2021-02-26 8:49 ` [RFC PATCH 4/4] hw/arm/virt-acpi-build: Add explicit idmap info in IORT table Wang Xingang
2021-02-26 9:03 ` [RFC PATCH 0/4] hw/arm/virt-acpi-build: Introduce iommu option for pci root bus no-reply
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