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[RFC 2/7] hw/pci: Introduce pci_device_iommu_bus
From: |
Eric Auger |
Subject: |
[RFC 2/7] hw/pci: Introduce pci_device_iommu_bus |
Date: |
Wed, 17 Jan 2024 09:02:06 +0100 |
This helper will allow subsequent patches to retrieve the IOMMU bus
and call its associated PCIIOMMUOps callbacks.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
include/hw/pci/pci.h | 1 +
hw/pci/pci.c | 16 ++++++++++++++++
2 files changed, 17 insertions(+)
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index 63c018b35a..649b327f9f 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -403,6 +403,7 @@ typedef struct PCIIOMMUOps {
} PCIIOMMUOps;
AddressSpace *pci_device_iommu_address_space(PCIDevice *dev);
+PCIBus *pci_device_iommu_bus(PCIDevice *dev);
/**
* pci_setup_iommu: Initialize specific IOMMU handlers for a PCIBus
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 76080af580..5bf07662fe 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -2672,6 +2672,22 @@ static void pci_device_class_base_init(ObjectClass
*klass, void *data)
}
}
+PCIBus *pci_device_iommu_bus(PCIDevice *dev)
+{
+ PCIBus *bus = pci_get_bus(dev);
+ PCIBus *iommu_bus = bus;
+
+ while (iommu_bus && !iommu_bus->iommu_ops && iommu_bus->parent_dev) {
+ PCIBus *parent_bus = pci_get_bus(iommu_bus->parent_dev);
+
+ iommu_bus = parent_bus;
+ }
+ if (pci_bus_bypass_iommu(bus)) {
+ return NULL;
+ }
+ return iommu_bus;
+}
+
AddressSpace *pci_device_iommu_address_space(PCIDevice *dev)
{
PCIBus *bus = pci_get_bus(dev);
--
2.41.0
[RFC 3/7] vfio/pci: Pass the usable IOVA ranges through PCIIOMMUOps, Eric Auger, 2024/01/17
[RFC 5/7] virtio-iommu: Remove the implementation of iommu_set_iova_ranges, Eric Auger, 2024/01/17
[RFC 6/7] hw/vfio: Remove memory_region_iommu_set_iova_ranges() call, Eric Auger, 2024/01/17