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-rw-r--r--drivers/iommu/iommufd/device.c59
-rw-r--r--drivers/iommu/iommufd/selftest.c8
-rw-r--r--drivers/vfio/iommufd.c10
-rw-r--r--include/linux/iommufd.h9
4 files changed, 53 insertions, 33 deletions
diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c
index ba21b81e43bc..4cc6de03f76e 100644
--- a/drivers/iommu/iommufd/device.c
+++ b/drivers/iommu/iommufd/device.c
@@ -428,9 +428,12 @@ static int iommufd_hwpt_attach_device(struct iommufd_hw_pagetable *hwpt,
}
handle->idev = idev;
- WARN_ON(pasid != IOMMU_NO_PASID);
- rc = iommu_attach_group_handle(hwpt->domain, idev->igroup->group,
- &handle->handle);
+ if (pasid == IOMMU_NO_PASID)
+ rc = iommu_attach_group_handle(hwpt->domain, idev->igroup->group,
+ &handle->handle);
+ else
+ rc = iommu_attach_device_pasid(hwpt->domain, idev->dev, pasid,
+ &handle->handle);
if (rc)
goto out_disable_iopf;
@@ -464,10 +467,12 @@ static void iommufd_hwpt_detach_device(struct iommufd_hw_pagetable *hwpt,
{
struct iommufd_attach_handle *handle;
- WARN_ON(pasid != IOMMU_NO_PASID);
-
handle = iommufd_device_get_attach_handle(idev, pasid);
- iommu_detach_group_handle(hwpt->domain, idev->igroup->group);
+ if (pasid == IOMMU_NO_PASID)
+ iommu_detach_group_handle(hwpt->domain, idev->igroup->group);
+ else
+ iommu_detach_device_pasid(hwpt->domain, idev->dev, pasid);
+
if (hwpt->fault) {
iommufd_auto_response_faults(hwpt, handle);
iommufd_fault_iopf_disable(idev);
@@ -483,8 +488,6 @@ static int iommufd_hwpt_replace_device(struct iommufd_device *idev,
struct iommufd_attach_handle *handle, *old_handle;
int rc;
- WARN_ON(pasid != IOMMU_NO_PASID);
-
rc = iommufd_hwpt_pasid_compat(hwpt, idev, pasid);
if (rc)
return rc;
@@ -502,8 +505,12 @@ static int iommufd_hwpt_replace_device(struct iommufd_device *idev,
}
handle->idev = idev;
- rc = iommu_replace_group_handle(idev->igroup->group, hwpt->domain,
- &handle->handle);
+ if (pasid == IOMMU_NO_PASID)
+ rc = iommu_replace_group_handle(idev->igroup->group,
+ hwpt->domain, &handle->handle);
+ else
+ rc = iommu_replace_device_pasid(hwpt->domain, idev->dev,
+ pasid, &handle->handle);
if (rc)
goto out_disable_iopf;
@@ -904,22 +911,25 @@ out_put_pt_obj:
}
/**
- * iommufd_device_attach - Connect a device to an iommu_domain
+ * iommufd_device_attach - Connect a device/pasid to an iommu_domain
* @idev: device to attach
+ * @pasid: pasid to attach
* @pt_id: Input a IOMMUFD_OBJ_IOAS, or IOMMUFD_OBJ_HWPT_PAGING
* Output the IOMMUFD_OBJ_HWPT_PAGING ID
*
- * This connects the device to an iommu_domain, either automatically or manually
- * selected. Once this completes the device could do DMA.
+ * This connects the device/pasid to an iommu_domain, either automatically
+ * or manually selected. Once this completes the device could do DMA with
+ * @pasid. @pasid is IOMMU_NO_PASID if this attach is for no pasid usage.
*
* The caller should return the resulting pt_id back to userspace.
* This function is undone by calling iommufd_device_detach().
*/
-int iommufd_device_attach(struct iommufd_device *idev, u32 *pt_id)
+int iommufd_device_attach(struct iommufd_device *idev, ioasid_t pasid,
+ u32 *pt_id)
{
int rc;
- rc = iommufd_device_change_pt(idev, IOMMU_NO_PASID, pt_id,
+ rc = iommufd_device_change_pt(idev, pasid, pt_id,
&iommufd_device_do_attach);
if (rc)
return rc;
@@ -934,8 +944,9 @@ int iommufd_device_attach(struct iommufd_device *idev, u32 *pt_id)
EXPORT_SYMBOL_NS_GPL(iommufd_device_attach, "IOMMUFD");
/**
- * iommufd_device_replace - Change the device's iommu_domain
+ * iommufd_device_replace - Change the device/pasid's iommu_domain
* @idev: device to change
+ * @pasid: pasid to change
* @pt_id: Input a IOMMUFD_OBJ_IOAS, or IOMMUFD_OBJ_HWPT_PAGING
* Output the IOMMUFD_OBJ_HWPT_PAGING ID
*
@@ -946,27 +957,31 @@ EXPORT_SYMBOL_NS_GPL(iommufd_device_attach, "IOMMUFD");
*
* If it fails then no change is made to the attachment. The iommu driver may
* implement this so there is no disruption in translation. This can only be
- * called if iommufd_device_attach() has already succeeded.
+ * called if iommufd_device_attach() has already succeeded. @pasid is
+ * IOMMU_NO_PASID for no pasid usage.
*/
-int iommufd_device_replace(struct iommufd_device *idev, u32 *pt_id)
+int iommufd_device_replace(struct iommufd_device *idev, ioasid_t pasid,
+ u32 *pt_id)
{
- return iommufd_device_change_pt(idev, IOMMU_NO_PASID, pt_id,
+ return iommufd_device_change_pt(idev, pasid, pt_id,
&iommufd_device_do_replace);
}
EXPORT_SYMBOL_NS_GPL(iommufd_device_replace, "IOMMUFD");
/**
- * iommufd_device_detach - Disconnect a device to an iommu_domain
+ * iommufd_device_detach - Disconnect a device/device to an iommu_domain
* @idev: device to detach
+ * @pasid: pasid to detach
*
* Undo iommufd_device_attach(). This disconnects the idev from the previously
* attached pt_id. The device returns back to a blocked DMA translation.
+ * @pasid is IOMMU_NO_PASID for no pasid usage.
*/
-void iommufd_device_detach(struct iommufd_device *idev)
+void iommufd_device_detach(struct iommufd_device *idev, ioasid_t pasid)
{
struct iommufd_hw_pagetable *hwpt;
- hwpt = iommufd_hw_pagetable_detach(idev, IOMMU_NO_PASID);
+ hwpt = iommufd_hw_pagetable_detach(idev, pasid);
iommufd_hw_pagetable_put(idev->ictx, hwpt);
refcount_dec(&idev->obj.users);
}
diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c
index d55dde28e9bc..0b3f5cbf242b 100644
--- a/drivers/iommu/iommufd/selftest.c
+++ b/drivers/iommu/iommufd/selftest.c
@@ -945,7 +945,7 @@ static int iommufd_test_mock_domain(struct iommufd_ucmd *ucmd,
}
sobj->idev.idev = idev;
- rc = iommufd_device_attach(idev, &pt_id);
+ rc = iommufd_device_attach(idev, IOMMU_NO_PASID, &pt_id);
if (rc)
goto out_unbind;
@@ -960,7 +960,7 @@ static int iommufd_test_mock_domain(struct iommufd_ucmd *ucmd,
return 0;
out_detach:
- iommufd_device_detach(idev);
+ iommufd_device_detach(idev, IOMMU_NO_PASID);
out_unbind:
iommufd_device_unbind(idev);
out_mdev:
@@ -994,7 +994,7 @@ static int iommufd_test_mock_domain_replace(struct iommufd_ucmd *ucmd,
goto out_dev_obj;
}
- rc = iommufd_device_replace(sobj->idev.idev, &pt_id);
+ rc = iommufd_device_replace(sobj->idev.idev, IOMMU_NO_PASID, &pt_id);
if (rc)
goto out_dev_obj;
@@ -1655,7 +1655,7 @@ void iommufd_selftest_destroy(struct iommufd_object *obj)
switch (sobj->type) {
case TYPE_IDEV:
- iommufd_device_detach(sobj->idev.idev);
+ iommufd_device_detach(sobj->idev.idev, IOMMU_NO_PASID);
iommufd_device_unbind(sobj->idev.idev);
mock_dev_destroy(sobj->idev.mock_dev);
break;
diff --git a/drivers/vfio/iommufd.c b/drivers/vfio/iommufd.c
index 516294fd901b..37e1efa2c7bf 100644
--- a/drivers/vfio/iommufd.c
+++ b/drivers/vfio/iommufd.c
@@ -128,7 +128,7 @@ void vfio_iommufd_physical_unbind(struct vfio_device *vdev)
lockdep_assert_held(&vdev->dev_set->lock);
if (vdev->iommufd_attached) {
- iommufd_device_detach(vdev->iommufd_device);
+ iommufd_device_detach(vdev->iommufd_device, IOMMU_NO_PASID);
vdev->iommufd_attached = false;
}
iommufd_device_unbind(vdev->iommufd_device);
@@ -146,9 +146,11 @@ int vfio_iommufd_physical_attach_ioas(struct vfio_device *vdev, u32 *pt_id)
return -EINVAL;
if (vdev->iommufd_attached)
- rc = iommufd_device_replace(vdev->iommufd_device, pt_id);
+ rc = iommufd_device_replace(vdev->iommufd_device,
+ IOMMU_NO_PASID, pt_id);
else
- rc = iommufd_device_attach(vdev->iommufd_device, pt_id);
+ rc = iommufd_device_attach(vdev->iommufd_device,
+ IOMMU_NO_PASID, pt_id);
if (rc)
return rc;
vdev->iommufd_attached = true;
@@ -163,7 +165,7 @@ void vfio_iommufd_physical_detach_ioas(struct vfio_device *vdev)
if (WARN_ON(!vdev->iommufd_device) || !vdev->iommufd_attached)
return;
- iommufd_device_detach(vdev->iommufd_device);
+ iommufd_device_detach(vdev->iommufd_device, IOMMU_NO_PASID);
vdev->iommufd_attached = false;
}
EXPORT_SYMBOL_GPL(vfio_iommufd_physical_detach_ioas);
diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h
index 60eff9272551..34b6e6ca4bfa 100644
--- a/include/linux/iommufd.h
+++ b/include/linux/iommufd.h
@@ -8,6 +8,7 @@
#include <linux/err.h>
#include <linux/errno.h>
+#include <linux/iommu.h>
#include <linux/refcount.h>
#include <linux/types.h>
#include <linux/xarray.h>
@@ -54,9 +55,11 @@ struct iommufd_device *iommufd_device_bind(struct iommufd_ctx *ictx,
struct device *dev, u32 *id);
void iommufd_device_unbind(struct iommufd_device *idev);
-int iommufd_device_attach(struct iommufd_device *idev, u32 *pt_id);
-int iommufd_device_replace(struct iommufd_device *idev, u32 *pt_id);
-void iommufd_device_detach(struct iommufd_device *idev);
+int iommufd_device_attach(struct iommufd_device *idev, ioasid_t pasid,
+ u32 *pt_id);
+int iommufd_device_replace(struct iommufd_device *idev, ioasid_t pasid,
+ u32 *pt_id);
+void iommufd_device_detach(struct iommufd_device *idev, ioasid_t pasid);
struct iommufd_ctx *iommufd_device_to_ictx(struct iommufd_device *idev);
u32 iommufd_device_to_id(struct iommufd_device *idev);
generated by cgit v1.2.3 (git 2.46.0) at 2025-07-31 10:02:06 +0000