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Diffstat (limited to 'arch/s390/kernel/early.c')
| -rw-r--r-- | arch/s390/kernel/early.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index fb84e3fc1686..9857cb046726 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -236,6 +236,10 @@ static __init void detect_machine_facilities(void) clock_comparator_max = -1ULL >> 1; __ctl_set_bit(0, 53); } + if (IS_ENABLED(CONFIG_PCI) && test_facility(153)) { + S390_lowcore.machine_flags |= MACHINE_FLAG_PCI_MIO; + /* the control bit is set during PCI initialization */ + } } static inline void save_vector_registers(void) |