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Tue, 23 Jun 2026 15:33:31 +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 15:33:31 +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 00/10] KVM: s390: A bunch of gmap-related fixes Date: Tue, 23 Jun 2026 17:33:21 +0200 Message-ID: <20260623153331.233784-1-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-ORIG-GUID: 3GmfOKAf_GSML5p_9VfWXTdz28MQyTb- X-Proofpoint-GUID: 3GmfOKAf_GSML5p_9VfWXTdz28MQyTb- X-Authority-Analysis: v=2.4 cv=Y4XIdBeN c=1 sm=1 tr=0 ts=6a3aa750 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=FelO9ux0wxsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=iLwnI1K-hrd9xSQBnUIA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjIzMDEyNiBTYWx0ZWRfXwyaiJMZrfvLW ZMIT7nNzl0uc8Gw9DUUgDker6qBAou28maWhk58B29NLMeBzQ3tpzpdYBq4+LIGSPhRdZ7PAG3o 5HwAiN34ihxA8rkGNaIuVpJNT95jsgKAJxHMt9XFIB7pKNmM+dKopqfSTxW0BN5bDLlc4wIkimu PVvzLB/Zegqz2VqCzE5h6AMPlunZ7zjl4XdvWkcOTsMGMNj9FDC+IemBHcJIgOQ9401WKkUyaup uL8AJufXgW2tjN4MNOaQjiQ0/vZLZk9rB7LZwHjvi6WMA3Ec+FV6JtI1aA+w1HHxl5i58chnUyE FpoMR0RoU9nGIFPHLEVPi47QVBJUKNeMKGFjhkKLF1SsbdoQTI7G8yuc0PipioP53W6LhU6Qdi/ KxJnXcGaizmSUUtzyc+WHYVPiGvykg== X-Proofpoint-Spam-Info: AW1haW4tMjYwNjIzMDEyNiBTYWx0ZWRfX8V9thiOMIQIO yaTFAPBqLnm6oX8qT1ZDb5aICRcIp/R+/pLnSJ9Z7InfTKPQGLhmPjvOY51vz9AX4Xxh/SBNX0k YrlIzn2pxTQH7OHUDBq8tq3pAgBlAnc= 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 adultscore=0 lowpriorityscore=0 malwarescore=0 spamscore=0 suspectscore=0 phishscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2606230126 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. v5->v6: * Move locking back in the individual cases in kvm_s390_set_mem_control() * Add commends and rework the handling of cmma dirty flags in kvm_s390_vm_{start,stop}_migration() * Avoid potential deadlock in the unlikely case of a nested guest running with a real address space 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 (10): 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() KVM: s390: vsie: Avoid potential deadlock with real spaces arch/s390/include/asm/pgtable.h | 4 +- arch/s390/kvm/dat.c | 5 +- arch/s390/kvm/gmap.c | 41 +++++++++--- arch/s390/kvm/gmap.h | 12 +++- arch/s390/kvm/kvm-s390.c | 66 +++++++++++++------- arch/s390/kvm/priv.c | 10 ++- arch/s390/mm/gmap_helpers.c | 3 +- tools/testing/selftests/kvm/s390/cmma_test.c | 6 ++ 8 files changed, 111 insertions(+), 36 deletions(-) -- 2.54.0