Merge tag 'docs-5.15' of git://git.lwn.net/linux

[linux-2.6-microblaze.git] / arch / s390 / kernel / early.c

diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index fb84e3f..9857cb0 100644 (file)
--- 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)