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Tue, 2 Jun 2026 14:23:56 +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 Subject: [PATCH v3 00/10] KVM: s390: More gmap and vsie fixes Date: Tue, 2 Jun 2026 16:23:46 +0200 Message-ID: <20260602142356.169458-1-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-GUID: U077jPze0StFdvF9IwnwmYk1FcTfmeZJ X-Authority-Analysis: v=2.4 cv=fv/sol4f c=1 sm=1 tr=0 ts=6a1ee783 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=n0ANnZiPoOazgFQFfi4A:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjAyMDEzNiBTYWx0ZWRfX559LSFFmDVnt dzGQASVNTU0V/i/0m4p+OTL5SEO5fBd8wZuhDVv3AZAG1bpmyOjLXJnbDasiuN1i++Ud7pwGYAt 52dBWVdccraDx22OXKKTdC1PzgKdKTfq6n5+0pswTRKhiyPnSk4X7DUQTDEAFqhd4yjLqiOJZrr zoeGNgkabb64fim2dBvrnVIQ9YOJFUDQPQd2zYVXZ5sJO6VpdP4nktLKFTPdWPOHUb/iMQEvpDw Yu9KZXRMTu6ycLcgMOmR8SDLutCOYZ+MeTk2y2Z/AqguqCl7qPsIijy357bZIIWbRb0POkZCjAf VPY9piayEjbTey3HYcTVHMoNoXXYm1TTJf1/ZhlilonbaCYo/SlUBKFJLxl5Md4R0uJ+4XjLKq8 3zNEg4pgBN8aIkh3Bh20zclzpLt2GzYjYBsTjzyn1c94Hz7EHZJsARYMPYpRIy+MLXGueITz1Cm UrQf8el7X/dAP6kRAkA== X-Proofpoint-ORIG-GUID: U077jPze0StFdvF9IwnwmYk1FcTfmeZJ 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=2026-06-02_02,2026-05-28_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 priorityscore=1501 spamscore=0 phishscore=0 clxscore=1015 impostorscore=0 suspectscore=0 bulkscore=0 lowpriorityscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605210000 definitions=main-2606020136 Another batch of fixups for gmap and vsie. Some minor fixes, some not-so-minor fixes that could have caused guest corruption under particular circumstances. v2->v3: * Improve patch 8 to avoid a possible race and minor issue when the given limit is smaller than a page * Fix possible reference leak in fault-in code * Fix possible warning if gmap_helper_zap_one_page() is called on a migration entry v1->v2: * Reordered the patches * _gmap_crstep_xchg_atomic() will now attempt to clear the vsie_notif bit when failing due to unshadowing; this prevents potential loops * try_get_locked_pte() will now return -EAGAIN instead of NULL if the pte was reached but the lock was contended; this prevents potential loops * _kvm_s390_pv_make_secure() will now attempt mmap_read_trylock(); this prevents try_get_locked_pte() from potentially racing * Take kvm->slots_lock instead of kvm->slots_arch_lock in kvm_s390_set_mem_control() when handling KVM_S390_VM_MEM_LIMIT_SIZE, and also take kvm->lock. * Minor cosmetic / style fixes. Claudio Imbrenda (10): KVM: s390: Fix _gmap_unmap_crste() KVM: s390: Fix _gmap_crstep_xchg_atomic() KVM: s390: Avoid potentially sleeping while atomic when zapping pages KVM: s390: Fix guest / virtual address confusion in _essa_clear_cbrl() KVM: s390: vsie: Fix rmap handling in _do_shadow_crste() KVM: s390: Fix fault-in code KVM: s390: Lock pte when making page secure KVM: s390: Prevent memslots outside the ASCE range KVM: s390: Fix possible reference leak in fault-in code KVM: s390: Remove ptep_zap_softleaf_entry() arch/s390/include/asm/gmap_helpers.h | 1 + arch/s390/kvm/faultin.c | 30 +++---- arch/s390/kvm/gaccess.c | 11 +-- arch/s390/kvm/gmap.c | 19 +++- arch/s390/kvm/gmap.h | 3 + arch/s390/kvm/kvm-s390.c | 33 +++++-- arch/s390/kvm/priv.c | 8 +- arch/s390/kvm/pv.c | 21 ++++- arch/s390/mm/gmap_helpers.c | 128 +++++++++++++++------------ 9 files changed, 165 insertions(+), 89 deletions(-) -- 2.54.0