diff options
Diffstat (limited to 'arch/s390/kernel/traps.c')
| -rw-r--r-- | arch/s390/kernel/traps.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c index 1d2aa448d103..8cb3832a1621 100644 --- a/arch/s390/kernel/traps.c +++ b/arch/s390/kernel/traps.c @@ -286,6 +286,17 @@ static void __init test_monitor_call(void) void __init trap_init(void) { + unsigned long flags; + struct ctlreg cr0; + + local_irq_save(flags); + cr0 = local_ctl_clear_bit(0, CR0_LOW_ADDRESS_PROTECTION_BIT); + psw_bits(S390_lowcore.external_new_psw).mcheck = 1; + psw_bits(S390_lowcore.program_new_psw).mcheck = 1; + psw_bits(S390_lowcore.svc_new_psw).mcheck = 1; + psw_bits(S390_lowcore.io_new_psw).mcheck = 1; + local_ctl_load(0, &cr0); + local_irq_restore(flags); local_mcck_enable(); test_monitor_call(); } |