On Thu, Jan 24, 2019 at 2:11 PM Igor Opaniuk <[email protected]> wrote:
>
> Add support of cancellation request to the TEE kernel internal
> client interface. Can be used by software TPM drivers, that leverage
> TEE under the hood (for instance in TPM2.0 mobile profile), for requesting
> cancellation of time-consuming operations (RSA key-pair generation etc.).
>
> Signed-off-by: Igor Opaniuk <[email protected]>
> ---
> drivers/tee/tee_core.c | 12 ++++++++++++
> include/linux/tee_drv.h | 14 ++++++++++++++
> 2 files changed, 26 insertions(+)
>
> diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c
> index 7b2bb4c..aba71a8 100644
> --- a/drivers/tee/tee_core.c
> +++ b/drivers/tee/tee_core.c
> @@ -1027,6 +1027,18 @@ int tee_client_invoke_func(struct tee_context *ctx,
> }
> EXPORT_SYMBOL_GPL(tee_client_invoke_func);
>
> +int tee_client_cancel_req(struct tee_context *ctx,
> + u32 cancel_id,
> + u32 session)
> +{
> +
> + if (!ctx->teedev->desc->ops->cancel_req)
> + return -EINVAL;
> + return ctx->teedev->desc->ops->cancel_req(ctx, cancel_id,
> + session);
> +}
> +EXPORT_SYMBOL_GPL(tee_client_cancel_req);
> +
> static int __init tee_init(void)
> {
> int rc;
> diff --git a/include/linux/tee_drv.h b/include/linux/tee_drv.h
> index 6cfe058..62a0b56 100644
> --- a/include/linux/tee_drv.h
> +++ b/include/linux/tee_drv.h
> @@ -526,6 +526,20 @@ int tee_client_invoke_func(struct tee_context *ctx,
> struct tee_ioctl_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
> + * @ctx: TEE Context
> + * @arg: Unique cancel request id
> + * @param: Session id
These need to be updated, see struct tee_ioctl_cancel_arg in
include/uapi/linux/tee.h
Thanks,
Jens
> + *
> + * Returns < 0 on error else see @arg->ret for result.
> + */
> +int tee_client_cancel_req(struct tee_context *ctx,
> + u32 cancel_id,
> + u32 session);
> +
> +
> static inline bool tee_param_is_memref(struct tee_param *param)
> {
> switch (param->attr & TEE_IOCTL_PARAM_ATTR_TYPE_MASK) {
> --
> 2.7.4
>
