diff options
Diffstat (limited to 'kernel/arch/arm/mm/fault.c')
| -rw-r--r-- | kernel/arch/arm/mm/fault.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/kernel/arch/arm/mm/fault.c b/kernel/arch/arm/mm/fault.c index 62016e3e4..b8aa1e9ee 100644 --- a/kernel/arch/arm/mm/fault.c +++ b/kernel/arch/arm/mm/fault.c @@ -599,6 +599,28 @@ do_PrefetchAbort(unsigned long addr, unsigned int ifsr, struct pt_regs *regs) arm_notify_die("", regs, &info, ifsr, 0); } +/* + * Abort handler to be used only during first unmasking of asynchronous aborts + * on the boot CPU. This makes sure that the machine will not die if the + * firmware/bootloader left an imprecise abort pending for us to trip over. + */ +static int __init early_abort_handler(unsigned long addr, unsigned int fsr, + struct pt_regs *regs) +{ + pr_warn("Hit pending asynchronous external abort (FSR=0x%08x) during " + "first unmask, this is most likely caused by a " + "firmware/bootloader bug.\n", fsr); + + return 0; +} + +void __init early_abt_enable(void) +{ + fsr_info[22].fn = early_abort_handler; + local_abt_enable(); + fsr_info[22].fn = do_bad; +} + #ifndef CONFIG_ARM_LPAE static int __init exceptions_init(void) { |