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Brown" To: kvm@vger.kernel.org Cc: Janosch Frank , Claudio Imbrenda , Christian Borntraeger , linux-s390@vger.kernel.org, linux-kselftest@vger.kernel.org, Nitya Khamar Subject: [PATCH 0/6] KVM: s390: selftests: Add selftests for KVM exits on s390x Date: Tue, 10 Nov 2026 06:16:13 -0500 Message-ID: <20261110111619.61760-1-aaronmbr@linux.ibm.com> X-Mailer: git-send-email 2.50.1 X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=POqaavqC c=1 sm=1 tr=0 ts=6af2fd12 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=zJRp6_cAMcgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=VnNF1IyMAAAA:8 a=bgxZqNnTwVNF5JVGVmQA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMTEwMDA0NCBTYWx0ZWRfX5A+qu6Z5PrS5 j0f+2ovelekZ9wFngw3r8sbteB5ZaE9NbUbU2xJwlEUOSf9H23u7/uKxy5VLeCXeAoNljxe7kAZ UzwqsukhYUl3R7L4UjstdVqGll+qxtnEQJECM2Ot045SAr1uAahz9o4r+CCQTR/m4egB5/W3UP3 C2Zmz+faxHWI5oiYMWaser3nI4vXUibQhjAGz5g5CP1+buILA/NIzbWZIDsP76IGRIFARAtdaiC KP2xCs+IQ7a+82rap7dGBgIiAJxwlRhAf/f7wdhrLN41WGnIARrd2hk2GCxCjD7vQpz/CXspBAg pJo/eLXI1TXsU+0289xsWwEOJu4LAzSCJem+DvW/eovlu3qiNOPQJBkqgcrGJHpiPDbt7VoHzoR OqNnnFNa9GepXlHFGYn72xnlrvzkvXdsCKPknCvY3TWm2jX0vWnFQVjBsJdDTCNy3nQVMrpIXri cEze5Ho68cBodMriIRw== X-Proofpoint-Spam-Info: AW1haW4tMjYxMTEwMDA0NCBTYWx0ZWRfXzeQh4Oxwqv6u uUy3MlMF5KLr2qrs2jXomdXBH2Em7aQn/JrFsoUYhfpXTQqfdysz1sIoXpk59+hl1xjLsYYucVE 76SF7TncorerELypHdJuzgPXAezGKhg= X-Proofpoint-ORIG-GUID: e8pOSlGPquN3MKJdfqOe8uRhyi5uXjsz X-Proofpoint-GUID: e8pOSlGPquN3MKJdfqOe8uRhyi5uXjsz X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-11-10_04,2026-11-06_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 bulkscore=0 impostorscore=0 malwarescore=0 phishscore=0 lowpriorityscore=0 suspectscore=0 adultscore=0 spamscore=0 clxscore=1011 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2611040001 definitions=main-2611100044 This series adds a selftest for the exits that KVM reports to userspace on s390x, mainly KVM_EXIT_S390_SIEIC. The existing s390 selftests do not check what userspace sees when a guest causes an intercept, for example a DIAG, a SIGP order, a program exception or a wait state. The tests checks the intercept code, the instruction and program data, and the register state reported in struct kvm_run. The series is split so that every patch adds tests on top of the previous one: 1: test harness and instruction intercepts (DIAG 0x500 and 0x501) 2: SIGP stop and program exceptions (addressing, segment translation) 3: wait state and VM create/destroy 4: ucontrol helpers, STSI, TSCH and STSCH intercepts 5: ucontrol storage key (KSS) and immediate_exit 6: clock comparator interrupt on a ucontrol VM The ucontrol tests require KVM_CAP_S390_UCONTROL and CAP_SYS_ADMIN, and the storage key test also requires CPUSTAT_KSS. When one of these is missing, only the affected tests are skipped, with a reason, and the others still run. These tests were co-developed with Nitya Khamar Testing: built with "make -C tools/testing/selftests/kvm ARCH=s390" and ran on a s390x z15 lpar with CONFIG_KVM_S390_UCONTROL=y as root: pass:13 fail:0 skip:0 as unprivileged: pass:8 fail:0 skip:5 (the five ucontrol tests) Aaron M. Brown (6): KVM: s390: selftests: Add kvm_exit test for instruction intercepts KVM: s390: selftests: Add SIGP and program exception tests KVM: s390: selftests: Add wait state and VM lifecycle tests KVM: s390: selftests: Add ucontrol helpers and instruction tests KVM: s390: selftests: Add ucontrol storage key and immediate exit tests KVM: s390: selftests: Add clock comparator interrupt test tools/testing/selftests/kvm/Makefile.kvm | 1 + .../kvm/include/s390/kvm_lifecycle.h | 43 + tools/testing/selftests/kvm/s390/kvm_exit.c | 835 ++++++++++++++++++ 3 files changed, 879 insertions(+) create mode 100644 tools/testing/selftests/kvm/include/s390/kvm_lifecycle.h create mode 100644 tools/testing/selftests/kvm/s390/kvm_exit.c base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4 -- 2.50.1 (Apple Git-155)