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Tue, 16 Jun 2026 16:51:14 +0000 (GMT) Received: from p-imbrenda.ibmuc.com (unknown [9.111.66.4]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 16 Jun 2026 16:51:14 +0000 (GMT) From: Claudio Imbrenda To: linux-kernel@vger.kernel.org Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, borntraeger@de.ibm.com, frankja@linux.ibm.com, david@kernel.org, seiden@linux.ibm.com, nrb@linux.ibm.com, schlameuss@linux.ibm.com, gra@linux.ibm.com, hca@linux.ibm.com, gerald.schaefer@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, svens@linux.ibm.com Subject: [PATCH v3 3/4] KVM: s390: Do not set special large pages dirty Date: Tue, 16 Jun 2026 18:51:09 +0200 Message-ID: <20260616165110.360921-4-imbrenda@linux.ibm.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616165110.360921-1-imbrenda@linux.ibm.com> References: <20260616165110.360921-1-imbrenda@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Info: AW1haW4tMjYwNjE2MDE3MyBTYWx0ZWRfX0b1vGCf/7Hd0 zakFyOg6WyVqhx7WiKV2aPqoLSK8ZTmgeyaZOE/mQNHSfEeXpl5Dkn9ltPY+sVgqqgl0ombAB7Y desurVLMJqc5WkoUuKSAGjyN+oJDZss= X-Proofpoint-GUID: -VJfpjn0r6aEoEFf20ZOnsJ30e6daDpd X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjE2MDE3MyBTYWx0ZWRfX0evDtGJrecZu a631J0Nf+o0eMcICvCiP3KzLg/Ozg1Pq4Vo7dMLdbWE8B4pDlFro4DCwlTnxaQwHlZ88THuvFtj mjxfK8UEiP669TItjWexc3ufhdlKWmyFsXYMtzFB6EeN/3VyuRzP43XGxumR79v0DFF3SD9RjHW g24iHGFnaWLF+NUQJZb9WLhR91Z8waCD8nBm4KSeg6Ok+G//RXf2OzVJpojPhIBgq9ILYfomM0f eJGkBmYfESiExFb3lVRf/fdqE390Hbvc/QPRZAORka2Gm2C+ZapNVm9lpGVRv3Es6Xv+HvyzDWh 0km1XWXnMkVYl88m+I1gDiVfMeVVeaT1sYXlo4VbqgJeoERqF7HwAPylF2q6MBj3zjCR39JCG+g V0aWLu4tfsbgsX4JiFgHov9WnQqUuGXhq/06XpuUyp5GI3xcTY7Ke6hbZPtrLTyDiWYDq5CYCT1 obe5V/0NZ+lX0yELeOw== X-Proofpoint-ORIG-GUID: -VJfpjn0r6aEoEFf20ZOnsJ30e6daDpd X-Authority-Analysis: v=2.4 cv=Dd0nbPtW c=1 sm=1 tr=0 ts=6a317f08 cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=FelO9ux0wxsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=3gdv_IAxfr86PQWoa5IA:9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-16_05,2026-06-15_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 clxscore=1015 priorityscore=1501 impostorscore=0 lowpriorityscore=0 adultscore=0 suspectscore=0 phishscore=0 spamscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606040000 definitions=main-2606160173 Special pages / folios should not be set dirty. This also applies to large pages. Add a missing check in gmap_clear_young_crste() to prevent setting the large page dirty if it is a large page. Signed-off-by: Claudio Imbrenda Fixes: a2c17f9270cc ("KVM: s390: New gmap code") --- arch/s390/kvm/gmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/s390/kvm/gmap.c b/arch/s390/kvm/gmap.c index 52d55ddea8d4..3192f610f696 100644 --- a/arch/s390/kvm/gmap.c +++ b/arch/s390/kvm/gmap.c @@ -327,7 +327,7 @@ static long gmap_clear_young_crste(union crste *crstep, gfn_t gfn, gfn_t end, st new.h.i = 1; new.s.fc1.y = 0; new.s.fc1.prefix_notif = 0; - if (new.s.fc1.d || !new.h.p) + if ((new.s.fc1.d || !new.h.p) && !new.s.fc1.s) folio_set_dirty(phys_to_folio(crste_origin_large(crste))); new.s.fc1.d = 0; new.h.p = 1; -- 2.54.0