Re: [PATCH v3 2/6] tee: Add kernel client object invoke helper

[Sumit Garg <sumit.garg@kernel.org>]

On Thu, 01 Oct 2026 at 16:32:34 +0530, Harshal Dev wrote:
>From: Amirreza Zarrabi <amirreza.zarrabi@oss.qualcomm.com>
>
>Kernel clients can open a TEE context and invoke regular TA commands
>through tee_client_invoke_func(). However, there is currently no
>equivalent helper for invoking TEE objects.
>
>Add tee_client_object_invoke_func() as a kernel client API for issuing
>object invocation requests. The helper checks that the backend provides
>object_invoke_func() before forwarding the request by setting the origin
>as TEE_OBJECT_INVOKE_KERNEL. This allows TEE backends to support
>privileged object-based calls from the kernel-space.
>
>Co-developed-by: Harshal Dev <harshal.dev@oss.qualcomm.com>
>Signed-off-by: Harshal Dev <harshal.dev@oss.qualcomm.com>
>Signed-off-by: Amirreza Zarrabi <amirreza.zarrabi@oss.qualcomm.com>
>---
> drivers/tee/tee_core.c  | 12 ++++++++++++
> include/linux/tee_drv.h | 13 +++++++++++++
> 2 files changed, 25 insertions(+)

Reviewed-by: Sumit Garg <sumit.garg@oss.qualcomm.com>

-Sumit

>
>diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c
>index 30901390149c..a03a3d645dd1 100644
>--- a/drivers/tee/tee_core.c
>+++ b/drivers/tee/tee_core.c
>@@ -1404,6 +1404,18 @@ int tee_client_invoke_func(struct tee_context *ctx,
> }
> EXPORT_SYMBOL_GPL(tee_client_invoke_func);
>
>+int tee_client_object_invoke_func(struct tee_context *ctx,
>+				  struct tee_ioctl_object_invoke_arg *arg,
>+				  struct tee_param *param)
>+{
>+	if (!ctx->teedev->desc->ops->object_invoke_func)
>+		return -EINVAL;
>+
>+	return ctx->teedev->desc->ops->object_invoke_func(ctx, arg, param,
>+							  TEE_OBJECT_INVOKE_KERNEL);
>+}
>+EXPORT_SYMBOL_GPL(tee_client_object_invoke_func);
>+
> int tee_client_cancel_req(struct tee_context *ctx,
> 			  struct tee_ioctl_cancel_arg *arg)
> {
>diff --git a/include/linux/tee_drv.h b/include/linux/tee_drv.h
>index f3c5e106d853..369c87ad0205 100644
>--- a/include/linux/tee_drv.h
>+++ b/include/linux/tee_drv.h
>@@ -283,6 +283,19 @@ int tee_client_invoke_func(struct tee_context *ctx,
> 			   struct tee_ioctl_invoke_arg *arg,
> 			   struct tee_param *param);
>
>+/**
>+ * tee_client_object_invoke_func() - Invoke a TEE object from kernel space
>+ * @ctx:    TEE Context
>+ * @arg:    Invoke arguments, see description of
>+ *          struct tee_ioctl_object_invoke_arg
>+ * @param:  Parameters for the object invocation
>+ *
>+ * Return: On success, returns 0; on failure, returns < 0.
>+ */
>+int tee_client_object_invoke_func(struct tee_context *ctx,
>+				  struct tee_ioctl_object_invoke_arg *arg,
>+				  struct tee_param *param);
>+
> /**
>  * tee_client_cancel_req() - Request cancellation of the previous open-session
>  * or invoke-command operations in a Trusted Application
>
>-- 
>2.34.1
>