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vfio: Create host IOMMU device instance

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Create host IOMMU device instance in vfio_attach_device() and call
.realize() to initialize it further.

Introuduce attribute VFIOIOMMUClass::hiod_typename and initialize
it based on VFIO backend type. It will facilitate HostIOMMUDevice
creation in vfio_attach_device().

Suggested-by: Cédric Le Goater <clg@redhat.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:
Zhenzhong Duan 2024-06-05 16:30:37 +08:00 • committed by Cédric Le Goater
parent 63c6e83ec2
commit a7fd91b876
5 changed files with 23 additions and 1 deletions
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16
hw/vfio/common.c
View file

@ -1528,6 +1528,7 @@ bool vfio_attach_device(char *name, VFIODevice *vbasedev,
{
const VFIOIOMMUClass *ops =
VFIO_IOMMU_CLASS(object_class_by_name(TYPE_VFIO_IOMMU_LEGACY));
HostIOMMUDevice *hiod;
if (vbasedev->iommufd) {
ops = VFIO_IOMMU_CLASS(object_class_by_name(TYPE_VFIO_IOMMU_IOMMUFD));
@ -1535,7 +1536,19 @@ bool vfio_attach_device(char *name, VFIODevice *vbasedev,
assert(ops);
return ops->attach_device(name, vbasedev, as, errp);
if (!ops->attach_device(name, vbasedev, as, errp)) {
return false;
}
hiod = HOST_IOMMU_DEVICE(object_new(ops->hiod_typename));
if (!HOST_IOMMU_DEVICE_GET_CLASS(hiod)->realize(hiod, vbasedev, errp)) {
object_unref(hiod);
ops->detach_device(vbasedev);
return false;
}
vbasedev->hiod = hiod;
return true;
}
void vfio_detach_device(VFIODevice *vbasedev)
@ -1543,5 +1556,6 @@ void vfio_detach_device(VFIODevice *vbasedev)
if (!vbasedev->bcontainer) {
return;
}
object_unref(vbasedev->hiod);
vbasedev->bcontainer->ops->detach_device(vbasedev);
}