On Wed, Jun 26, 2019 at 06:58:42AM +0200, Rouven Czerwinski wrote:
> The HAB interface for i.MX8MQ only implements the retrieval of status
> and events. The SoC status is retrieved using the TF-A SIP API found in
> the downstream imx TF-A. After calling into the TF-A the passed data
> structures need to be invalidated, since otherwise the cached zero value
> is used.
> Currently the TF-A report event call only supports FAILURE events.
> Testing the TF-A with other event types resulted in a freeze in the
> bootrom code, which was not investigated further.
> We instead walk the memory containing the events and retrieve the events
> ourselves. They are exposed using the same API.
>
> Signed-off-by: Rouven Czerwinski <r.czerwinski@xxxxxxxxxxxxxx>
> ---
> +{
> + return habv4_get_status(&hab_smc_ops);
> +}
> +
> +static int init_imx8_hab_get_status(void)
> +{
> + int ret = 0;
> +
> + if (cpu_is_mx8mq())
> + ret = imx8_hab_get_status();
> + else
> + return 0;
> +
> + /*
> + * Nobody will check the return value if there were HAB errors, but the
> + * initcall will fail spectaculously with a strange error message.
> + */
> + if (ret == -EPERM)
> + return 0;
Maybe just ignore the return value of imx8_hab_get_status() completely
and just add a comment that this is called for error printing only here?
Sascha
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