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Mon, 22 Jun 2026 16:07:40 +0000 (GMT) Received: from p-imbrenda.ehn-de.ibm.com (unknown [9.224.75.30]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 22 Jun 2026 16:07:39 +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 v5 0/9] KVM: s390: A bunch of gmap-related fixes Date: Mon, 22 Jun 2026 18:07:30 +0200 Message-ID: <20260622160739.202044-1-imbrenda@linux.ibm.com> X-Mailer: git-send-email 2.54.0 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: AW1haW4tMjYwNjIyMDE1NyBTYWx0ZWRfX0VWQvWd2avHJ q0CNwjJ7n0x3PERRl8CvWVKwNb4GXfjnwKfevuvRG1b7ObjkcD4AwHxHjn3VSMU5cPMBj5hKdTw m0b/DR+mcFlhCAanhUm6eRV6PnzYB6z5fFClTXpCgKK1v1Bg6Ha1AUxWn1CJu0i+ZYOFbqa/jSG rIL+zUt7AWAdVaXRc0rStAWWPxDTs3nRbalm0MeIO/egLpel6Qd6JKlq1bMFSF/bnTQQ8a+1SYd w9/7gqKNF+wWKi2wKJ64c0YIwahezpJypiHI72vXmDHbbb5EY0Fn6x13OZRttG+HDEf6IfGYlAd tcrI7Cnp2hpYUTKUrGK6bD1ootaojQ99sDX3C+qBFZ9fbBnOrU8/2aesslVrBRDo3jvFc1mMDvb akaI7Cog33SGFj01FNj7VAJ+96E1LkQfdRkHnnHzBI98trOY6j9x7Nd9PLVXPg9UyHK2bTNDfdY dMO9NYJbQU/AUvjB5+w== X-Proofpoint-GUID: 4CzJyn1B7TZZ-LQPS9vi_RlrSzy7zWj- X-Proofpoint-Spam-Info: AW1haW4tMjYwNjIyMDE1NyBTYWx0ZWRfX3PpAUPPjptx2 yv141+pZyaAWaRf8xfMsro0S7aNoECCC+7GP4F9hZrr4Tt8YveROU3kYVQiHE/1UBuqjpCHYSPm P19pruf8fz4XLnJQ1eWxHaB56nDi5Qo= X-Authority-Analysis: v=2.4 cv=I/lVgtgg c=1 sm=1 tr=0 ts=6a395dd0 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=FelO9ux0wxsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=ucjmMn6u_Xy7mvBSwZ0A:9 X-Proofpoint-ORIG-GUID: 4CzJyn1B7TZZ-LQPS9vi_RlrSzy7zWj- 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=2026-06-22_03,2026-06-22_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-2606220157 Fix handling of _PAGE_UNUSED pte bit. The bit was lingering around longer than it should have, causing issues. This is yet a different approach from the previous version. Fix some cmma dirty tracking functions. Also fix a few other small issues in gmap. v4-v5: * Make sure the counter of cmma-dirty pages does not explode * Improve comments in cmma selftest * Rework and fix locking in kvm_s390_set_mem_control() * Do not return success if an allocation in kvm_s390_set_cmma_bits() fails v3->v4: * Improve/fix descriptions of patches 1 and 3 * Fix handle_{sske,pfmf} under memory pressure * Fix cmma dirty tracking and its selftest v2->v3: * Fix _PAGE_UNUSED in yet a different way * Fix a potential overflow in dat_peek_cmma() * Some minor gmap fixes that are not actual bugs yet v1->v2: * Completely different approach, entirely new patch Claudio Imbrenda (9): s390/mm: Fix handling of _PAGE_UNUSED pte bit KVM: s390: Fix dat_peek_cmma() overflow KVM: s390: Do not set special large pages dirty KVM: s390: Fix code typo in gmap_protect_asce_top_level() KVM: s390: Fix handle_{sske,pfmf} under memory pressure KVM: s390: Fix locking in kvm_s390_set_mem_control() KVM: s390: Fix cmma dirty tracking KVM: s390: selftests: Fix cmma selftest KVM: s390: Return failure in case of failure in kvm_s390_set_cmma_bits() arch/s390/include/asm/pgtable.h | 4 +-- arch/s390/kvm/dat.c | 5 ++- arch/s390/kvm/gmap.c | 15 ++++++--- arch/s390/kvm/kvm-s390.c | 35 ++++++++------------ arch/s390/kvm/priv.c | 10 ++++-- arch/s390/mm/gmap_helpers.c | 3 +- tools/testing/selftests/kvm/s390/cmma_test.c | 6 ++++ 7 files changed, 46 insertions(+), 32 deletions(-) -- 2.54.0