diff options
Diffstat (limited to 'arch/s390/kernel/early.c')
| -rw-r--r-- | arch/s390/kernel/early.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index 629f173f60cd..b432d63d0b37 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -30,9 +30,23 @@ #include <asm/sclp.h> #include <asm/facility.h> #include <asm/boot_data.h> -#include <asm/pci_insn.h> #include "entry.h" +static void __init reset_tod_clock(void) +{ + u64 time; + + if (store_tod_clock(&time) == 0) + return; + /* TOD clock not running. Set the clock to Unix Epoch. */ + if (set_tod_clock(TOD_UNIX_EPOCH) != 0 || store_tod_clock(&time) != 0) + disabled_wait(); + + memset(tod_clock_base, 0, 16); + *(__u64 *) &tod_clock_base[1] = TOD_UNIX_EPOCH; + S390_lowcore.last_update_clock = TOD_UNIX_EPOCH; +} + /* * Initialize storage key for kernel pages */ @@ -236,7 +250,6 @@ static __init void detect_machine_facilities(void) clock_comparator_max = -1ULL >> 1; __ctl_set_bit(0, 53); } - enable_mio_ctl(); } static inline void save_vector_registers(void) @@ -303,6 +316,7 @@ static void __init check_image_bootable(void) void __init startup_init(void) { + reset_tod_clock(); check_image_bootable(); time_early_init(); init_kernel_storage_key(); |