diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 2105767fcc5..5147175f921 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -211,6 +211,19 @@ void system_reset_exception(struct pt_regs *regs) die("System Reset", regs, SIGABRT); + /* + * Some CPUs when released from the debugger will execute this path. + * These CPUs entered the debugger via a soft-reset. If the CPU was + * hung before entering the debugger it will return to the hung + * state when exiting this function. This causes a problem in + * kdump since the hung CPU(s) will not respond to the IPI sent + * from kdump. To prevent the problem we call crash_kexec_secondary() + * here. If a kdump had not been initiated or we exit the debugger + * with the "exit and recover" command (x) crash_kexec_secondary() + * will return after 5ms and the CPU returns to its previous state. + */ + crash_kexec_secondary(regs); + /* Must die if the interrupt is not recoverable */ if (!(regs->msr & MSR_RI)) panic("Unrecoverable System Reset"); |