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vfio: add vfio_attach_device_by_iommu_type()

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Allow attachment by explicitly passing a TYPE_VFIO_IOMMU_* string;
vfio-user will use this later.

Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: John Levon <john.levon@nutanix.com>
Link: https://lore.kernel.org/qemu-devel/20250507152020.1254632-4-john.levon@nutanix.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
John Levon 2025-05-07 16:20:08 +01:00 • committed by Cédric Le Goater
parent d60fb709cf
commit ef73671f0b
2 changed files with 18 additions and 7 deletions
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22
hw/vfio/device.c
View file

@ -376,21 +376,29 @@ VFIODevice *vfio_get_vfio_device(Object *obj)
}
}
bool vfio_device_attach(char *name, VFIODevice *vbasedev,
AddressSpace *as, Error **errp)
bool vfio_device_attach_by_iommu_type(const char *iommu_type, char *name,
VFIODevice *vbasedev, AddressSpace *as,
Error **errp)
{
const VFIOIOMMUClass *ops =
VFIO_IOMMU_CLASS(object_class_by_name(TYPE_VFIO_IOMMU_LEGACY));
if (vbasedev->iommufd) {
ops = VFIO_IOMMU_CLASS(object_class_by_name(TYPE_VFIO_IOMMU_IOMMUFD));
}
VFIO_IOMMU_CLASS(object_class_by_name(iommu_type));
assert(ops);
return ops->attach_device(name, vbasedev, as, errp);
}
bool vfio_device_attach(char *name, VFIODevice *vbasedev,
AddressSpace *as, Error **errp)
{
const char *iommu_type = vbasedev->iommufd ?
TYPE_VFIO_IOMMU_IOMMUFD :
TYPE_VFIO_IOMMU_LEGACY;
return vfio_device_attach_by_iommu_type(iommu_type, name, vbasedev,
as, errp);
}
void vfio_device_detach(VFIODevice *vbasedev)
{
if (!vbasedev->bcontainer) {

3
include/hw/vfio/vfio-device.h
View file

@ -127,6 +127,9 @@ bool vfio_device_hiod_create_and_realize(VFIODevice *vbasedev,
const char *typename, Error **errp);
bool vfio_device_attach(char *name, VFIODevice *vbasedev,
AddressSpace *as, Error **errp);
bool vfio_device_attach_by_iommu_type(const char *iommu_type, char *name,
VFIODevice *vbasedev, AddressSpace *as,
Error **errp);
void vfio_device_detach(VFIODevice *vbasedev);
VFIODevice *vfio_get_vfio_device(Object *obj);