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hw/pci: Introduce pci_device_[set|unset]_iommu_device()

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pci_device_[set|unset]_iommu_device() call pci_device_get_iommu_bus_devfn()
to get iommu_bus->iommu_ops and call [set|unset]_iommu_device callback to
set/unset HostIOMMUDevice for a given PCI device.

Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Yi Liu 2024-06-05 16:30:39 +08:00 committed by Cédric Le Goater
parent 6c8ed5fea1
commit b025ea6886
2 changed files with 64 additions and 1 deletions
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27
hw/pci/pci.c
View file

@ -2742,6 +2742,33 @@ AddressSpace *pci_device_iommu_address_space(PCIDevice *dev)
return &address_space_memory;
}
bool pci_device_set_iommu_device(PCIDevice *dev, HostIOMMUDevice *hiod,
Error **errp)
{
PCIBus *iommu_bus;
/* set_iommu_device requires device's direct BDF instead of aliased BDF */
pci_device_get_iommu_bus_devfn(dev, &iommu_bus, NULL, NULL);
if (iommu_bus && iommu_bus->iommu_ops->set_iommu_device) {
return iommu_bus->iommu_ops->set_iommu_device(pci_get_bus(dev),
iommu_bus->iommu_opaque,
dev->devfn, hiod, errp);
}
return true;
}
void pci_device_unset_iommu_device(PCIDevice *dev)
{
PCIBus *iommu_bus;
pci_device_get_iommu_bus_devfn(dev, &iommu_bus, NULL, NULL);
if (iommu_bus && iommu_bus->iommu_ops->unset_iommu_device) {
return iommu_bus->iommu_ops->unset_iommu_device(pci_get_bus(dev),
iommu_bus->iommu_opaque,
dev->devfn);
}
}
void pci_setup_iommu(PCIBus *bus, const PCIIOMMUOps *ops, void *opaque)
{
/*

38
include/hw/pci/pci.h
View file

@ -3,6 +3,7 @@
#include "exec/memory.h"
#include "sysemu/dma.h"
#include "sysemu/host_iommu_device.h"
/* PCI includes legacy ISA access. */
#include "hw/isa/isa.h"
@ -383,10 +384,45 @@ typedef struct PCIIOMMUOps {
*
* @devfn: device and function number
*/
AddressSpace * (*get_address_space)(PCIBus *bus, void *opaque, int devfn);
AddressSpace * (*get_address_space)(PCIBus *bus, void *opaque, int devfn);
/**
* @set_iommu_device: attach a HostIOMMUDevice to a vIOMMU
*
* Optional callback, if not implemented in vIOMMU, then vIOMMU can't
* retrieve host information from the associated HostIOMMUDevice.
*
* @bus: the #PCIBus of the PCI device.
*
* @opaque: the data passed to pci_setup_iommu().
*
* @devfn: device and function number of the PCI device.
*
* @dev: the #HostIOMMUDevice to attach.
*
* @errp: pass an Error out only when return false
*
* Returns: true if HostIOMMUDevice is attached or else false with errp set.
*/
bool (*set_iommu_device)(PCIBus *bus, void *opaque, int devfn,
HostIOMMUDevice *dev, Error **errp);
/**
* @unset_iommu_device: detach a HostIOMMUDevice from a vIOMMU
*
* Optional callback.
*
* @bus: the #PCIBus of the PCI device.
*
* @opaque: the data passed to pci_setup_iommu().
*
* @devfn: device and function number of the PCI device.
*/
void (*unset_iommu_device)(PCIBus *bus, void *opaque, int devfn);
} PCIIOMMUOps;
AddressSpace *pci_device_iommu_address_space(PCIDevice *dev);
bool pci_device_set_iommu_device(PCIDevice *dev, HostIOMMUDevice *hiod,
Error **errp);
void pci_device_unset_iommu_device(PCIDevice *dev);
/**
* pci_setup_iommu: Initialize specific IOMMU handlers for a PCIBus