diff options
-rw-r--r-- | core/cpu.c | 13 |
1 files changed, 11 insertions, 2 deletions
@@ -1191,12 +1191,21 @@ static int64_t opal_reinit_cpus(uint64_t flags) else req.clr_bits |= SPR_HID0_POWER9_RADIX; - cleanup_global_tlb(); current_radix_mode = radix; } } - /* Apply HID bits changes if any */ + /* Cleanup the TLB. We do that unconditionally, this works + * around issues where OSes fail to invalidate the PWC in Radix + * mode for example. This only works on P9 and later, but we + * also know we don't have a problem with Linux cleanups on + * P8 so this isn't a problem. If we wanted to cleanup the + * TLB on P8 as well, we'd have to use jobs to do it locally + * on each CPU. + */ + cleanup_global_tlb(); + + /* Apply HID bits changes if any */ if (req.set_bits || req.clr_bits) cpu_change_all_hid0(&req); |