diff options
| author | Per Fransson <per.xx.fransson@stericsson.com> | 2011-09-23 14:11:24 +0200 |
|---|---|---|
| committer | Philippe Langlais <philippe.langlais@stericsson.com> | 2012-05-22 11:01:02 +0200 |
| commit | 9bac6a0efe0993a13822a3cf84371d6ff92e1abb (patch) | |
| tree | e69abae137e7c7ad7826f04b4fe4e62098fbb224 | |
| parent | 8c35f32920f28d4cb68f7e41d4323f57baba5eae (diff) | |
ux500: Start crash dump through SW reset
When using kexec/kdump without an crash kernel image loaded:
* clean the caches and write the crash_notes
* perform a restart
ST-Ericsson ID: 340331
Change-Id: I1ae34ed2b5e43da4849650a8a7d2f1e453dcbe93
Signed-off-by: Per Fransson <per.xx.fransson@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/32678
Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com>
Reviewed-by: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
| -rw-r--r-- | arch/arm/Kconfig | 7 | ||||
| -rw-r--r-- | arch/arm/kernel/machine_kexec.c | 10 | ||||
| -rw-r--r-- | include/linux/kexec.h | 1 | ||||
| -rw-r--r-- | kernel/kexec.c | 10 |
4 files changed, 27 insertions, 1 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 46cf36a5114..275ac0dd1e8 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -2079,6 +2079,13 @@ config KEXEC initially work for you. It may help to enable device hotplugging support. +config CRASH_SWRESET + bool "Perform a software reset at a panic (EXPERIMENTAL)" + depends on EXPERIMENTAL + depends on KEXEC + help + If no crash kernel has been loaded, perform a SW reset as plan B. + config ATAGS_PROC bool "Export atags in procfs" depends on KEXEC diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c index 29b7f3c27b7..7455ca0fc51 100644 --- a/arch/arm/kernel/machine_kexec.c +++ b/arch/arm/kernel/machine_kexec.c @@ -139,3 +139,13 @@ void machine_kexec(struct kimage *image) soft_restart(reboot_code_buffer_phys); } + +void machine_crash_swreset(void) +{ + printk(KERN_INFO "Software reset on panic!\n"); + + flush_cache_all(); + outer_flush_all(); + outer_disable(); + arm_pm_restart(0, NULL); +} diff --git a/include/linux/kexec.h b/include/linux/kexec.h index ddeb2a9debe..9943c5dd618 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -120,6 +120,7 @@ struct kimage { /* kexec interface functions */ extern void machine_kexec(struct kimage *image); +extern void machine_crash_swreset(void); extern int machine_kexec_prepare(struct kimage *image); extern void machine_kexec_cleanup(struct kimage *image); extern asmlinkage long sys_kexec_load(unsigned long entry, diff --git a/kernel/kexec.c b/kernel/kexec.c index 6146beeeecc..799064323aa 100644 --- a/kernel/kexec.c +++ b/kernel/kexec.c @@ -1082,6 +1082,7 @@ asmlinkage long compat_sys_kexec_load(unsigned long entry, void crash_kexec(struct pt_regs *regs) { + struct pt_regs fixed_regs; /* Take the kexec_mutex here to prevent sys_kexec_load * running on one cpu from replacing the crash kernel * we are using after a panic on a different cpu. @@ -1092,13 +1093,20 @@ void crash_kexec(struct pt_regs *regs) */ if (mutex_trylock(&kexec_mutex)) { if (kexec_crash_image) { - struct pt_regs fixed_regs; crash_setup_regs(&fixed_regs, regs); crash_save_vmcoreinfo(); machine_crash_shutdown(&fixed_regs); machine_kexec(kexec_crash_image); } +#ifdef CONFIG_CRASH_SWRESET + else { + crash_setup_regs(&fixed_regs, regs); + crash_save_vmcoreinfo(); + machine_crash_shutdown(&fixed_regs); + machine_crash_swreset(); + } +#endif mutex_unlock(&kexec_mutex); } } |