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| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-01-20 14:01:31 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-01-20 14:01:31 -0300 |
| commit | b4b7ff4b08e691656c9d77c758fc355833128ac0 (patch) | |
| tree | 82fcb00e6b918026dc9f2d1f05ed8eee83874cc0 /arch/arm/mm/fault.c | |
| parent | 35acfa0fc609f2a2cd95cef4a6a9c3a5c38f1778 (diff) | |
Linux-libre 4.4-gnupck-4.4-gnu
Diffstat (limited to 'arch/arm/mm/fault.c')
| -rw-r--r-- | arch/arm/mm/fault.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c index 0d629b8f9..daafcf121 100644 --- a/arch/arm/mm/fault.c +++ b/arch/arm/mm/fault.c @@ -593,6 +593,28 @@ 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) { |