hwt_backend_svc_buf
.hwt_backend_svc_buf = spe_backend_svc_buf,
error = ctx->hwt_backend->ops->hwt_backend_svc_buf(ctx, data, data_size,
int (*hwt_backend_svc_buf)(struct hwt_context *, void *data,
int hwt_backend_svc_buf(struct hwt_context *ctx, void *data, size_t data_size,
error = hwt_backend_svc_buf(ctx, data2, data_size, data_version);