[coreboot-gerrit] Change in coreboot[master]: console: Add config EARLY_OVERRIDE_LOGLEVEL for overriding early log ...

[Johnny Lin (Code Review)]

Johnny Lin has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/45684 )

Change subject: console: Add config EARLY_OVERRIDE_LOGLEVEL for overriding early log level
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console: Add config EARLY_OVERRIDE_LOGLEVEL for overriding early log level

For early boot stages before POSTCAR it can override log level by
get_option(), default set to n.
Make init_log_level() set log level for all stages because
get_log_level() is called by printk so avoid calling an overridden
function in case it impacts performance.

Tested=On OCP Delta Lake, log level can be overridden by get_option().

Change-Id: I532a88722c8e003b8e187a9714d26104c8ed8c6c
Signed-off-by: Johnny Lin 
---
M src/console/Kconfig
M src/console/init.c
2 files changed, 12 insertions(+), 8 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/84/45684/1

diff --git a/src/console/Kconfig b/src/console/Kconfig
index bad6c56..9a5d87b 100644
--- a/src/console/Kconfig
+++ b/src/console/Kconfig
@@ -309,6 +309,13 @@
    help
      Send coreboot debug output to a System76 embedded controller.

+config EARLY_OVERRIDE_LOGLEVEL
+	bool
+	default n
+	help
+	  Set to "y" when the platform overrides the log level by get_option()
+	  during early boot stages before POSTCAR.
+
 config CONSOLE_OVERRIDE_LOGLEVEL
    bool
    help
diff --git a/src/console/init.c b/src/console/init.c
index 1dba9ad..a060683 100644
--- a/src/console/init.c
+++ b/src/console/init.c
@@ -12,21 +12,21 @@
 #define CONSOLE_LEVEL_CONST !ENV_STAGE_HAS_DATA_SECTION

static int console_inited;
-static int console_loglevel = CONFIG_DEFAULT_CONSOLE_LOGLEVEL;
+static int console_loglevel;

static inline int get_log_level(void)
 {
    if (console_inited == 0)
    	return -1;
-	if (CONSOLE_LEVEL_CONST)
-		return get_console_loglevel();
+	if (CONSOLE_LEVEL_CONST && !CONFIG(EARLY_OVERRIDE_LOGLEVEL))
+		return CONFIG_DEFAULT_CONSOLE_LOGLEVEL;

return console_loglevel;
 }

static inline void set_log_level(int new_level)
 {
-	if (CONSOLE_LEVEL_CONST)
+	if (CONSOLE_LEVEL_CONST && !CONFIG(EARLY_OVERRIDE_LOGLEVEL))
    	return;

console_loglevel = new_level;
@@ -34,10 +34,7 @@

static void init_log_level(void)
 {
-	int debug_level = get_console_loglevel();
-
-	if (CONSOLE_LEVEL_CONST)
-		return;
+	int debug_level = CONFIG_DEFAULT_CONSOLE_LOGLEVEL;

get_option(&debug_level, "debug_level");