[PATCH v2 1/8] vdpa: add bind_mm/unbind_mm callbacks
From: Stefano Garzarella <sgarzare@redhat.com>
Date: 2023-03-02 11:35:41
Also in:
kvm, lkml, virtualization
Subsystem:
the rest, virtio core · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang
These new optional callbacks is used to bind/unbind the device to
a specific address space so the vDPA framework can use VA when
these callbacks are implemented.
Suggested-by: Jason Wang <redacted>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
Notes:
v2:
- removed `struct task_struct *owner` param (unused for now, maybe
useful to support cgroups) [Jason]
- add unbind_mm callback [Jason]
include/linux/vdpa.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 43f59ef10cc9..369c21394284 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h@@ -290,6 +290,14 @@ struct vdpa_map_file { * @vdev: vdpa device * @idx: virtqueue index * Returns pointer to structure device or error (NULL) + * @bind_mm: Bind the device to a specific address space + * so the vDPA framework can use VA when this + * callback is implemented. (optional) + * @vdev: vdpa device + * @mm: address space to bind + * @unbind_mm: Unbind the device from the address space + * bound using the bind_mm callback. (optional) + * @vdev: vdpa device * @free: Free resources that belongs to vDPA (optional) * @vdev: vdpa device */
@@ -351,6 +359,8 @@ struct vdpa_config_ops { int (*set_group_asid)(struct vdpa_device *vdev, unsigned int group, unsigned int asid); struct device *(*get_vq_dma_dev)(struct vdpa_device *vdev, u16 idx); + int (*bind_mm)(struct vdpa_device *vdev, struct mm_struct *mm); + void (*unbind_mm)(struct vdpa_device *vdev); /* Free device resources */ void (*free)(struct vdpa_device *vdev);
--
2.39.2