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[PULL,v3,11/19] hw/pxb: Add a bypass iommu property

Message ID 20210716151416.155127-12-mst@redhat.com
State New
Headers show
Series [PULL,v3,01/19] hw/i386/acpi-build: Add ACPI PCI hot-plug methods to Q35 | expand

Commit Message

Michael S. Tsirkin July 16, 2021, 3:15 p.m. UTC 
From: Xingang Wang <wangxingang5@huawei.com>

Add a bypass_iommu property for pci_expander_bridge, the property
is used to indicate whether pxb root bus will bypass iommu. By
default the bypass_iommu is disabled, and it can be enabled with:
qemu -device pxb-pcie,bus_nr=0x10,addr=0x1,bypass_iommu=true

Signed-off-by: Xingang Wang <wangxingang5@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <1625748919-52456-3-git-send-email-wangxingang5@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/pci-bridge/pci_expander_bridge.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/hw/pci-bridge/pci_expander_bridge.c b/hw/pci-bridge/pci_expander_bridge.c
index aedded1064..7112dc3062 100644
--- a/hw/pci-bridge/pci_expander_bridge.c
+++ b/hw/pci-bridge/pci_expander_bridge.c
@@ -57,6 +57,7 @@  struct PXBDev {
 
     uint8_t bus_nr;
     uint16_t numa_node;
+    bool bypass_iommu;
 };
 
 static PXBDev *convert_to_pxb(PCIDevice *dev)
@@ -255,6 +256,7 @@  static void pxb_dev_realize_common(PCIDevice *dev, bool pcie, Error **errp)
     bus->map_irq = pxb_map_irq_fn;
 
     PCI_HOST_BRIDGE(ds)->bus = bus;
+    PCI_HOST_BRIDGE(ds)->bypass_iommu = pxb->bypass_iommu;
 
     pxb_register_bus(dev, bus, &local_err);
     if (local_err) {
@@ -301,6 +303,7 @@  static Property pxb_dev_properties[] = {
     /* Note: 0 is not a legal PXB bus number. */
     DEFINE_PROP_UINT8("bus_nr", PXBDev, bus_nr, 0),
     DEFINE_PROP_UINT16("numa_node", PXBDev, numa_node, NUMA_NODE_UNASSIGNED),
+    DEFINE_PROP_BOOL("bypass_iommu", PXBDev, bypass_iommu, false),
     DEFINE_PROP_END_OF_LIST(),
 };