5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx> commit 27072b8e18a73ffeffb1c140939023915a35134b upstream. When the CMMA state needs to be reset, the no-dat bit also needs to be reset. Failure to do so could cause issues in the guest, since the guest expects the bit to be cleared after a reset. Cc: <stable@xxxxxxxxxxxxxxx> Reviewed-by: Nico Boehr <nrb@xxxxxxxxxxxxx> Message-ID: <20231109123624.37314-1-imbrenda@xxxxxxxxxxxxx> Signed-off-by: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/s390/mm/pgtable.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -731,7 +731,7 @@ void ptep_zap_unused(struct mm_struct *m pte_clear(mm, addr, ptep); } if (reset) - pgste_val(pgste) &= ~_PGSTE_GPS_USAGE_MASK; + pgste_val(pgste) &= ~(_PGSTE_GPS_USAGE_MASK | _PGSTE_GPS_NODAT); pgste_set_unlock(ptep, pgste); preempt_enable(); }
