Denis Carikli (GNUtoo@no-log.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3991
-gerrit
commit d74ecb89b9b321c3e99c7b3b121e6fc06ee44046 Author: Denis 'GNUtoo' Carikli GNUtoo@no-log.org Date: Sun Oct 20 23:37:35 2013 +0200
X86 Kconfig: Make the MAX_REBOOT_CNT selectable in X86_BOOTBLOCK_NORMAL mode.
src/arch/x86/Kconfig defined MAX_REBOOT_CNT as 3.
In the bootblock, the reboot_bits cmos option is increased by one at each boot. If the boot is successful, the respective nvram settings have to be reset to boot on the normal/ prefix next time.
If KEEP_BOOT_COUNT is selected, it has to be done after the ramstage, if not, it's done in the ramstage.
In case of a failed boot, the reboot_bits keeps increasing until it reach KEEP_BOOT_COUNT. Once it is reached, it will swtich to fallback/ at next boot.
With KEEP_BOOT_COUNT beeing hidden in make menuconfig, and set to 3, the user probably won't know that coreboot will only switch to fallback after 3 failed boots, and will act as if the computer will not boot anymore with its current coreboot image.
This patch makes KEEP_BOOT_COUNT with a default of 1.
This patch was tested on the Lenovo X60.
Change-Id: I746df11c933dfe62e01e1591479ca96a84907dc0 Signed-off-by: Denis 'GNUtoo' Carikli GNUtoo@no-log.org --- src/arch/x86/Kconfig | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/src/arch/x86/Kconfig b/src/arch/x86/Kconfig index b4e8eb0..f643218 100644 --- a/src/arch/x86/Kconfig +++ b/src/arch/x86/Kconfig @@ -43,10 +43,18 @@ config STACK_SIZE default 0x1000
# Maximum reboot count -# TODO: Improve description. config MAX_REBOOT_CNT - int - default 3 + int "Number of failed boot attempts before switching back to fallback/" + default 1 + depends on X86_BOOTBLOCK_NORMAL + help + Note that the minimum number of reset a machine has to do to boot + can vary across machines. + If you set it to a number that is less that the machine minimum, + the machine will then switch to fallback/ during the next boot. + Once in fallback/, the machine will keep that settings unless + the nvram is reset, which will make it switch to fallback/ + again during the next boot.
# This is something you almost certainly don't want to mess with. # How many SIPIs do we send when starting up APs and cores?