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Tue, 23 Jun 2026 15:33:32 +0000 (GMT) Received: from p-imbrenda.ehn-de.ibm.com (unknown [9.224.75.30]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 23 Jun 2026 15:33:32 +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 v6 03/10] KVM: s390: Do not set special large pages dirty Date: Tue, 23 Jun 2026 17:33:24 +0200 Message-ID: <20260623153331.233784-4-imbrenda@linux.ibm.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260623153331.233784-1-imbrenda@linux.ibm.com> References: <20260623153331.233784-1-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-Details-Enc: AW1haW4tMjYwNjIzMDEyNiBTYWx0ZWRfX6+JJoJXxzPMA k8clEqkr3+NU9G8QwM6N8jrXMXpJxWYPm9vjoqLImLtIQ8+XCpVT0WdDCX8nM55cTZHb1lYyohv VUuqBb1r+mdAHnfUj1MP20Hzec+Qb1Ln8iPONDACbYamXCR9IUw+13lMSIp2/EUsbN2hD9zNePT F9YY3mg21HcRQd7TbeiDPTxP1F6GUUH5NnlzaG22zUlh7nZDbu0qPwUwgboIHIxiLcXT0IDzuSh GEyIF/I5F5eT13/6wY2wmGZyR0gI+dbdJjH8fQLJFCBSyQ/HqFX6KxBMueHDDTwPKIXz2+o1lYE ttiWbLjbJ/ZjLziHerPkaPnYj47PgtaWJ7ztayDeYkodn12wQs3FPMsqHlXlFrjLkMGtsgPceZf Wgg1Mtm4tuhQRhqGjdX/zFjHrND65WuBNGGnkxkDDRtWbONS+mv1T/7ehCNsh41vdAqCZNSGtGj KvGjpficqbM1p5CP7Dw== X-Proofpoint-GUID: 5V1vx4Pf143ULZSJ2NnNsPyKCQ2J48lj X-Proofpoint-Spam-Info: AW1haW4tMjYwNjIzMDEyNiBTYWx0ZWRfXwu9S+54k99P0 3G/n7ZyUx3iq8LkYTIyXGB+DabW8YnO8ctum69pddP183WUh7NWwvH6vmxeF6iHCe0OpNxrDYEM iiyAr/UM0KV02KMyD0nCqEzxlhiRBe8= X-Authority-Analysis: v=2.4 cv=I/lVgtgg c=1 sm=1 tr=0 ts=6a3aa750 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=FelO9ux0wxsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=NX4vPgGMuaxhIts7GPsA:9 X-Proofpoint-ORIG-GUID: 5V1vx4Pf143ULZSJ2NnNsPyKCQ2J48lj 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=2026-06-23_03,2026-06-23_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 spamscore=0 phishscore=0 clxscore=1015 priorityscore=1501 adultscore=0 impostorscore=0 bulkscore=0 suspectscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2606230126 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 special 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