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Wed, 20 May 2026 15:17:11 +0000 (GMT) Received: from p-imbrenda.aag-de.ibm.com (unknown [9.52.223.175]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 20 May 2026 15:17:11 +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, pbonzini@redhat.com, seanjc@google.com, yan.y.zhao@intel.com, isaku.yamahata@intel.com Subject: [PATCH v1 0/4] KVM: s390: Implement KVM_PRE_FAULT_MEMORY Date: Wed, 20 May 2026 17:17:06 +0200 Message-ID: <20260520151710.231788-1-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-Reinject: loops=2 maxloops=12 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTIwMDE0NyBTYWx0ZWRfX4EVSu5tSyKvN DrYG5Sb7J3b50kYVGudof4fsctdQL7P0nP2fecXo0/AKnAimq+qXK6HsG1OeCfzFmMg2bogxqpJ 6I5xKAmnK9qozho3mwJasw8ySy600VjD7+8lQNNwbWjaGoAX25vHHQLo4JauTddORxWkJVk1DPF UPvoCDJ1UKdzAdqOekj4sEq6/WJEWCup45RSr6PEfKo9fvmAseZC5STLPneX198Vx3gJ15AGFJR GXD6bEXMxQwA+ReeS1FKiJGblJSXuV3zdxhVKId7DAY3iYZPSlu6EzgrPvr41SoRPqtKPQJyi1G lxdEXGVXkK1bMk+5L2zSujboPE7fw/ZnGbDvetelXzriHfwEJp4b4Y1GwOiVpIFSdChJYvx7vfQ cITGOxKu1hmWdPB78Azy4GDFqcq1/deJoWaFZ82ZUYWriGWu/VkSKEg4K1b1PQqetUCXPTr1aAl /5v+mgoMXLWU1xRjeiQ== X-Authority-Analysis: v=2.4 cv=BNuDalQG c=1 sm=1 tr=0 ts=6a0dd07e cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=gonlQ4SBPNJqcCZ8TcQA:9 X-Proofpoint-ORIG-GUID: GVM5E0vT7xQR2duTEPQo5ObYPhVBdiwr X-Proofpoint-GUID: RSsGa8SVrEW7u_jp0YhrgcvEC8i8VWQG X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-20_02,2026-05-18_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 priorityscore=1501 malwarescore=0 impostorscore=0 suspectscore=0 lowpriorityscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605200147 Implement KVM_PRE_FAULT_MEMORY on s390, and update documentation and selftests accordingly. Faulted-in pages will be marked as accessed, unlike x86, otherwise they will trigger a minor fault when accessed. Avoiding such faults is one of the points of KVM_PRE_FAULT_MEMORY. CCing x86 people due to changes in the documentation and the selftests Claudio Imbrenda (4): KVM: s390: Implement KVM_PRE_FAULT_MEMORY KVM: s390: Update KVM_PRE_FAULT_MEMORY API documentation KVM: selftests: Fix pre_fault_memory_test to run on s390 KVM: selftests: Enable pre_fault_memory_test for s390 Documentation/virt/kvm/api.rst | 5 ++- arch/s390/kvm/Kconfig | 1 + arch/s390/kvm/kvm-s390.c | 41 +++++++++++++++++++ tools/testing/selftests/kvm/Makefile.kvm | 1 + .../selftests/kvm/pre_fault_memory_test.c | 7 ++-- 5 files changed, 50 insertions(+), 5 deletions(-) -- 2.54.0