[PATCH v3 2/3] event: Introduce EVT_POST_PREBOOT event

[Ilias Apalodimas]

On Wed, 1 Apr 2026 at 09:04, Michal Simek <michal.simek at amd.com> wrote:
>
> Add a new EVT_POST_PREBOOT event type which is fired in main_loop()
> after the preboot command has been executed.
>
> Signed-off-by: Michal Simek <michal.simek at amd.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>
> ---

Acked-by: Ilias Apalodimas <ilias.apalodimas at linaro.org>


>
> Changes in v3:
> - add missing type_name extension
>
> Changes in v2:
> - check return value
>
>  common/event.c  | 3 +++
>  common/main.c   | 4 ++++
>  include/event.h | 9 +++++++++
>  3 files changed, 16 insertions(+)
>
> diff --git a/common/event.c b/common/event.c
> index 8d7513eb10b6..398e713d2f82 100644
> --- a/common/event.c
> +++ b/common/event.c
> @@ -49,6 +49,9 @@ const char *const type_name[] = {
>         /* main loop events */
>         "main_loop",
>
> +       /* post preboot events */
> +       "post_preboot",
> +
>         /* livetree has been built */
>         "of_live_init",
>  };
> diff --git a/common/main.c b/common/main.c
> index b0b6e74f5d3d..4b4504557f6e 100644
> --- a/common/main.c
> +++ b/common/main.c
> @@ -19,6 +19,7 @@
>  #include <net.h>
>  #include <version_string.h>
>  #include <efi_loader.h>
> +#include <event.h>
>
>  static void run_preboot_environment_command(void)
>  {
> @@ -53,6 +54,9 @@ void main_loop(void)
>         if (IS_ENABLED(CONFIG_USE_PREBOOT))
>                 run_preboot_environment_command();
>
> +       if (event_notify_null(EVT_POST_PREBOOT))
> +               return;
> +
>         if (IS_ENABLED(CONFIG_UPDATE_TFTP))
>                 update_tftp(0UL, NULL, NULL);
>
> diff --git a/include/event.h b/include/event.h
> index 1d267f1d1054..3ce5f992b04e 100644
> --- a/include/event.h
> +++ b/include/event.h
> @@ -153,6 +153,15 @@ enum event_t {
>          */
>         EVT_MAIN_LOOP,
>
> +       /**
> +        * @EVT_POST_PREBOOT:
> +        * This event is triggered in main_loop() after the preboot command
> +        * has run, so that devices initialised by preboot (e.g. USB, UFS)
> +        * are available to event handlers. Its parameter is NULL.
> +        * A non-zero return value causes the boot to fail.
> +        */
> +       EVT_POST_PREBOOT,
> +
>         /**
>          * @EVT_OF_LIVE_BUILT:
>          * This event is triggered immediately after the live device tree has been
> --
> 2.43.0
>