On Thu, May 23, 2024 at 04:19:35PM +0530, Pankaj Gupta wrote:
> NXP hardware IP(s) for secure-enclaves like Edgelock Enclave(ELE),
> are embedded in the SoC to support the features like HSM, SHE & V2X,
> using message based communication interface.
>
> The secure enclave FW communicates on a dedicated messaging unit(MU)
> based interface(s) with application core, where kernel is running.
> It exists on specific i.MX processors. e.g. i.MX8ULP, i.MX93.
>
> This patch adds the driver for communication interface to secure-enclave,
> for exchanging messages with NXP secure enclave HW IP(s) like EdgeLock
> Enclave (ELE) from Kernel-space, used by kernel management layers like
> - DM-Crypt.
>
> Signed-off-by: Pankaj Gupta <pankaj.gupta@xxxxxxx>
> ---
> drivers/firmware/imx/Kconfig | 12 +
> drivers/firmware/imx/Makefile | 2 +
> drivers/firmware/imx/ele_base_msg.c | 286 +++++++++++++++++++
> drivers/firmware/imx/ele_base_msg.h | 92 +++++++
> drivers/firmware/imx/ele_common.c | 239 ++++++++++++++++
> drivers/firmware/imx/ele_common.h | 43 +++
> drivers/firmware/imx/se_ctrl.c | 531 ++++++++++++++++++++++++++++++++++++
> drivers/firmware/imx/se_ctrl.h | 99 +++++++
> include/linux/firmware/imx/se_api.h | 14 +
> 9 files changed, 1318 insertions(+)
>
> +static int imx_fetch_se_soc_info(struct device *dev)
> +{
> + struct se_if_priv *priv = dev_get_drvdata(dev);
> + struct imx_se_node_info_list *info_list;
> + const struct imx_se_node_info *info;
> + struct soc_device_attribute *attr;
> + struct soc_device *sdev;
> + u64 serial_num;
> + u16 soc_rev;
> + int err = 0;
> +
> + info = priv->info;
> + info_list = (struct imx_se_node_info_list *)
> + device_get_match_data(dev);
> +
> + /* This function should be called once.
> + * Check if the soc_rev is zero to continue.
> + */
> + if (priv->soc_rev)
> + return err;
> +
> + err = info->se_fetch_soc_info(dev, &soc_rev, &serial_num);
> + if (err < 0) {
> + dev_err(dev, "Failed to fetch SoC Info.");
> + return err;
> + }
This is called unconditionally but is not set for i.MX93. You should
either set it for i.MX93 or check it before calling it.
Sascha
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