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To: qemu-devel@nongnu.org
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"Michael S. Tsirkin" <mst@redhat.com>
Subject: [PATCH v8 04/28] vfio: add vfio_attach_device_by_iommu_type()
Date: Wed, 19 Feb 2025 15:48:34 +0100
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Allow attachment by explicitly passing a TYPE_VFIO_IOMMU_* string;
vfio-user will use this later.
Signed-off-by: John Levon <john.levon@nutanix.com>
---
hw/vfio/common.c | 30 +++++++++++++++++++-----------
include/hw/vfio/vfio-common.h | 3 +++
2 files changed, 22 insertions(+), 11 deletions(-)
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index b49aafc40c..eefd735bc6 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -1569,25 +1569,20 @@ retry:
return info;
}
=20
-bool vfio_attach_device(char *name, VFIODevice *vbasedev,
- AddressSpace *as, Error **errp)
+bool vfio_attach_device_by_iommu_type(const char *iommu_type, char *name,
+ VFIODevice *vbasedev, AddressSpace *=
as,
+ Error **errp)
{
- const VFIOIOMMUClass *ops =3D
- VFIO_IOMMU_CLASS(object_class_by_name(TYPE_VFIO_IOMMU_LEGACY));
HostIOMMUDevice *hiod =3D NULL;
-
- if (vbasedev->iommufd) {
- ops =3D VFIO_IOMMU_CLASS(object_class_by_name(TYPE_VFIO_IOMMU_IOMM=
UFD));
- }
-
- assert(ops);
-
+ const VFIOIOMMUClass *ops =3D
+ VFIO_IOMMU_CLASS(object_class_by_name(iommu_type));
=20
if (!vbasedev->mdev) {
hiod =3D HOST_IOMMU_DEVICE(object_new(ops->hiod_typename));
vbasedev->hiod =3D hiod;
}
=20
+
if (!ops->attach_device(name, vbasedev, as, errp)) {
object_unref(hiod);
vbasedev->hiod =3D NULL;
@@ -1597,6 +1592,19 @@ bool vfio_attach_device(char *name, VFIODevice *vbas=
edev,
return true;
}
=20
+bool vfio_attach_device(char *name, VFIODevice *vbasedev,
+ AddressSpace *as, Error **errp)
+{
+ const char *iommu_type =3D TYPE_VFIO_IOMMU_LEGACY;
+
+ if (vbasedev->iommufd) {
+ iommu_type =3D TYPE_VFIO_IOMMU_IOMMUFD;
+ }
+
+ return vfio_attach_device_by_iommu_type(iommu_type, name, vbasedev,
+ as, errp);
+}
+
void vfio_detach_device(VFIODevice *vbasedev)
{
if (!vbasedev->bcontainer) {
diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
index f4f08eb8a6..c40f8de6bc 100644
--- a/include/hw/vfio/vfio-common.h
+++ b/include/hw/vfio/vfio-common.h
@@ -252,6 +252,9 @@ bool vfio_device_is_mdev(VFIODevice *vbasedev);
bool vfio_device_hiod_realize(VFIODevice *vbasedev, Error **errp);
bool vfio_attach_device(char *name, VFIODevice *vbasedev,
AddressSpace *as, Error **errp);
+bool vfio_attach_device_by_iommu_type(const char *iommu_type, char *name,
+ VFIODevice *vbasedev, AddressSpace *=
as,
+ Error **errp);
void vfio_detach_device(VFIODevice *vbasedev);
VFIODevice *vfio_get_vfio_device(Object *obj);
=20
--=20
2.34.1