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| author | Claudio Imbrenda <imbrenda@linux.ibm.com> | 2023-11-09 15:36:24 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-12-13 18:46:17 +0300 |
| commit | e42b3e30f13d427ef4bc6dd4c0ac0a7f826d8702 (patch) | |
| tree | cfbae804989d25ea46ca45eba8b0fb70a3b0e39a | |
| parent | 061a0a3a8dc1c638a83ac6da6d8d3ee7fa74191e (diff) | |
| download | linux-e42b3e30f13d427ef4bc6dd4c0ac0a7f826d8702.tar.xz | |
KVM: s390/mm: Properly reset no-dat
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@vger.kernel.org>
Reviewed-by: Nico Boehr <nrb@linux.ibm.com>
Message-ID: <20231109123624.37314-1-imbrenda@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/s390/mm/pgtable.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index 783e07934a3d..74fce7c45484 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -667,7 +667,7 @@ void ptep_zap_unused(struct mm_struct *mm, unsigned long addr, 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(); } |