vboot: save whether developer mode is enabled

Save whether or not vboot has selected developer mode as a flag
in vboot_working_data.  Other coreboot code may access this flag
without needing to consult vboot_handoff (which is in the process
of being deprecated).

BUG=b:124141368, b:124192753
TEST=make clean && make test-abuild
BRANCH=none

Change-Id: Ieb6ac4937c943aea78ddc762595a05387d2b8114
Signed-off-by: Joel Kitching <kitching@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32843
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/security/vboot/bootmode.c

@@ -164,10 +164,8 @@ int vboot_recovery_mode_memory_retrain(void)
 
 int vboot_developer_mode_enabled(void)
 {
-	if (cbmem_possibly_online() && vboot_handoff_check_developer_flag())
-		return 1;
-
-	return 0;
+	return cbmem_possibly_online() &&
+		vboot_get_working_data()->flags & VBOOT_WD_FLAG_DEVELOPER_MODE;
 }
 
 #if CONFIG(VBOOT_NO_BOARD_SUPPORT)

src/security/vboot/misc.h

@@ -47,6 +47,8 @@ struct vboot_working_data {
  */
 /* vboot requests display initialization from coreboot. */
 #define VBOOT_WD_FLAG_DISPLAY_INIT (1 << 0)
+/* vboot has selected developer mode. */
+#define VBOOT_WD_FLAG_DEVELOPER_MODE (1 << 1)
 
 /*
  * Source: security/vboot/common.c

src/security/vboot/vboot_common.c

@@ -88,11 +88,6 @@ static int vboot_get_handoff_flag(uint32_t flag)
 	return !!(vbho->out_flags & flag);
 }
 
-int vboot_handoff_check_developer_flag(void)
-{
-	return vboot_get_handoff_flag(VB_INIT_OUT_ENABLE_DEVELOPER);
-}
-
 int vboot_handoff_check_recovery_flag(void)
 {
 	return vboot_get_handoff_flag(VB_INIT_OUT_ENABLE_RECOVERY);

src/security/vboot/vboot_common.h

@@ -62,7 +62,6 @@ int vboot_get_handoff_info(void **addr, uint32_t *size);
  * Returns value read for other fields
  */
 int vboot_handoff_check_recovery_flag(void);
-int vboot_handoff_check_developer_flag(void);
 int vboot_handoff_get_recovery_reason(void);
 
 /* ============================ VBOOT REBOOT ============================== */

src/security/vboot/vboot_logic.c

@@ -364,10 +364,13 @@ void verstage_main(void)
 		vboot_reboot();
 	}
 
-	/* Is vboot declaring that display is available?  If so, we should mark
-	   it down, so that the mainboard/SoC knows to initialize display. */
+	/* Jot down some information from vboot which may be required later on
+	   in coreboot boot flow. */
 	if (ctx.flags & VB2_CONTEXT_DISPLAY_INIT)
+		/* Mainboard/SoC should initialize display. */
 		vboot_get_working_data()->flags |= VBOOT_WD_FLAG_DISPLAY_INIT;
+	if (ctx.flags & VB2_CONTEXT_DEVELOPER_MODE)
+		vboot_get_working_data()->flags |= VBOOT_WD_FLAG_DEVELOPER_MODE;
 
 	/* Determine which firmware slot to boot (based on NVRAM) */
 	printk(BIOS_INFO, "Phase 2\n");