[coreboot-gerrit] Patch set updated for coreboot: a258325 Add a KEEP_BOOT_COUNT Kconfig option.

Denis Carikli (GNUtoo@no-log.org) gerrit at coreboot.org
Sat Nov 2 01:29:37 CET 2013

Denis Carikli (GNUtoo at no-log.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3990


commit a258325ee3703fd17749fab9e8237b313c79ac10
Author: Denis 'GNUtoo' Carikli <GNUtoo at no-log.org>
Date:   Mon Oct 21 01:56:47 2013 +0200

    Add a KEEP_BOOT_COUNT Kconfig option.
    The use case of that option is to inform coreboot (trough the nvram) at the
      next boot, that the computer could not fully boot to boot to an usable state.
      In that case, the boot count is incremented by one.
    Previously there was no way to tell coreboot that the computer really booted
      successfully, because it was assumed that if set_boot_successful was called
      in ramstage, then the computer would have booted successfully.
    However many things can go wrong after that point, for instance the payload
      could fail to boot, or the operating system's kernel could fail to boot too,
      due to the wrong configurations passed to it by coreboot and the payload.
    Change-Id: I01af053455eb6bd2f7a4f9d37e8c234ba8d55250
    Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo at no-log.org>
 src/arch/x86/Kconfig    |  8 ++++++++
 src/lib/fallback_boot.c | 10 ++++++++++
 2 files changed, 18 insertions(+)

diff --git a/src/arch/x86/Kconfig b/src/arch/x86/Kconfig
index 0a21fcc..b4e8eb0 100644
--- a/src/arch/x86/Kconfig
+++ b/src/arch/x86/Kconfig
@@ -72,6 +72,14 @@ config X86_BOOTBLOCK_NORMAL
+	bool "Keep boot count"
+	default n
+	depends on PC80_SYSTEM && X86_BOOTBLOCK_NORMAL
+	help
+	  If enabled, the boot count is not reset anymore in the ramstage.
+	  This delegates that task to the software running after the ramstage.
 	default "bootblock_simple.c" if X86_BOOTBLOCK_SIMPLE
diff --git a/src/lib/fallback_boot.c b/src/lib/fallback_boot.c
index 0c49d5c..994dd0a 100644
--- a/src/lib/fallback_boot.c
+++ b/src/lib/fallback_boot.c
@@ -1,6 +1,8 @@
 #include <console/console.h>
 #include <fallback.h>
+#include <string.h>
 #include <watchdog.h>
+#include <arch/acpi.h>
 #include <arch/io.h>
 void boot_successful(void)
@@ -10,8 +12,16 @@ void boot_successful(void)
+	/* we don't want to resume with the wrong prefix next time */
+	if (acpi_slp_type == 3 &&
+	    strncmp(CONFIG_CBFS_PREFIX, "fallback", sizeof("fallback")))
+		set_boot_successful();
 	/* Remember this was a successful boot */
 	/* turn off the boot watchdog */

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