This will allow consumers to choose a pxe label at runtime instead of
having to prompt the user. One good use-case for this, is choosing
whether or not to apply a dtbo depending on the hardware configuration.
e.g: for TI's AM335x EVM, it would be convenient to apply a particular
dtbo only when the J9 jumper is on PRUSS mode. To achieve this, the
pxe menu should have 2 labels, one with the dtbo and the other without,
then the "pxe_label_override" env variable should point to the label with
the dtbo at runtime only when the jumper is on PRUSS mode.
This change can be used for different use-cases and bring more
flexibilty to consumers who use sysboot/pxe_utils.
if "pxe_label_override" is set but does not exist in the pxe menu,
the code should fallback to the default label if given, and no failure
is returned but rather a warning message.
Signed-off-by: Amjad Ouled-Ameur <aouledam...@baylibre.com>
---
cmd/pxe_utils.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/cmd/pxe_utils.c b/cmd/pxe_utils.c
index 067c24e5ff4b..b1009f9c7547 100644
--- a/cmd/pxe_utils.c
+++ b/cmd/pxe_utils.c
@@ -1354,9 +1354,11 @@ static struct menu *pxe_menu_to_menu(struct pxe_menu
*cfg)
struct pxe_label *label;
struct list_head *pos;
struct menu *m;
+ char *label_override;
int err;
int i = 1;
char *default_num = NULL;
+ char *override_num = NULL;
/*
* Create a menu and add items for all the labels.
@@ -1367,6 +1369,8 @@ static struct menu *pxe_menu_to_menu(struct pxe_menu *cfg)
if (!m)
return NULL;
+ label_override = env_get("pxe_label_override");
+
list_for_each(pos, &cfg->labels) {
label = list_entry(pos, struct pxe_label, list);
@@ -1375,11 +1379,22 @@ static struct menu *pxe_menu_to_menu(struct pxe_menu
*cfg)
menu_destroy(m);
return NULL;
}
+ if (label_override &&
+ (strcmp(label->name, label_override) == 0))
+ override_num = label->num;
if (cfg->default_label &&
(strcmp(label->name, cfg->default_label) == 0))
default_num = label->num;
}
+ if (label_override) {
+ if (override_num)
+ default_num = override_num;
+ else
+ printf("Missing override pxe label: %s\n",
+ label_override);
+ }
+
/*
* After we've created items for each label in the menu, set the
* menu's default label if one was specified.
--
2.25.1
