在 2022/12/16 16:17, Stefano Garzarella 写道:
On Fri, Dec 16, 2022 at 02:37:45PM +0800, Jason Wang wrote:
On Thu, Dec 15, 2022 at 12:30 AM Stefano Garzarella
<sgarzare@xxxxxxxxxx> wrote:
This new optional callback is used to bind the device to a specific
address space so the vDPA framework can use VA when this callback
is implemented.
Suggested-by: Jason Wang <jasowang@xxxxxxxxxx>
Signed-off-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>
---
include/linux/vdpa.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 6d0f5e4e82c2..34388e21ef3f 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -282,6 +282,12 @@ struct vdpa_map_file {
* @iova: iova to be unmapped
* @size: size of the area
* Returns integer: success (0) or
error (< 0)
+ * @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
Do we need an unbind or did a NULL mm mean unbind?
Yep, your comment in patch 6 makes it necessary. I will add it!
+ * @owner: process that owns the
address space
Any reason we need the task_struct here?
Mainly to attach to kthread to the process cgroups, but that part is
still in TODO since I need to understand it better.
Ok I see.
Maybe we can remove the task_struct here and use `current` directly in
the callback.
Yes, it's easier to start without cgroup and we can add it on top.
Thanks
Thanks,
Stefano
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