Denis Carikli (GNUtoo@no-log.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3990
-gerrit
commit 79f26db1485553562da57d55b947297fd5ad5696 Author: Denis 'GNUtoo' Carikli GNUtoo@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@no-log.org --- src/arch/x86/Kconfig | 8 ++++++++ src/arch/x86/boot/acpi.c | 12 ++++++++++++ src/lib/fallback_boot.c | 4 ++++ 3 files changed, 24 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
endchoice
+config KEEP_BOOT_COUNT + 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. + config BOOTBLOCK_SOURCE string default "bootblock_simple.c" if X86_BOOTBLOCK_SIMPLE diff --git a/src/arch/x86/boot/acpi.c b/src/arch/x86/boot/acpi.c index 0e09ec5..57115f9 100644 --- a/src/arch/x86/boot/acpi.c +++ b/src/arch/x86/boot/acpi.c @@ -33,6 +33,9 @@ #include <cbmem.h> #include <cpu/x86/lapic_def.h> #include <cpu/cpu.h> +#if CONFIG_KEEP_BOOT_COUNT +#include <fallback.h> +#endif #if CONFIG_COLLECT_TIMESTAMPS #include <timestamp.h> #endif @@ -638,6 +641,15 @@ void acpi_resume(void *wake_vec) if (mainboard_suspend_resume) mainboard_suspend_resume();
+#if CONFIG_KEEP_BOOT_COUNT + /* we don't want to resume with the wrong prefix next time. + * And doing it in the bootblock seems counterintuitive: + * the bootblock would then need to know it's resuming... + */ + if (strncmp(CONFIG_CBFS_PREFIX, "fallback", sizeof("fallback"))) + set_boot_successful(); +#endif + post_code(POST_OS_RESUME); acpi_jump_to_wakeup(wake_vec); } diff --git a/src/lib/fallback_boot.c b/src/lib/fallback_boot.c index b956c94..042db08 100644 --- a/src/lib/fallback_boot.c +++ b/src/lib/fallback_boot.c @@ -40,8 +40,12 @@ void boot_successful(void)
vbe_textmode_console(); #endif + +/* We want to only do it at resume in the case of CONFIG_KEEP_BOOT_COUNT */ +#if !CONFIG_KEEP_BOOT_COUNT /* Remember this was a successful boot */ set_boot_successful(); +#endif
/* turn off the boot watchdog */ watchdog_off();