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Fri, 30 Sep 2022 21:07:55 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 30 Sep 2022 21:07:55 +0000 (GMT) From: Janis Schoetterl-Glausch To: Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Heiko Carstens , Vasily Gorbik , Alexander Gordeev Cc: Janis Schoetterl-Glausch , David Hildenbrand , Jonathan Corbet , kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-s390@vger.kernel.org, Paolo Bonzini , Shuah Khan , Sven Schnelle Subject: [PATCH v1 0/9] KVM: s390: Extend MEM_OP ioctl by storage key checked cmpxchg Date: Fri, 30 Sep 2022 23:07:42 +0200 Message-Id: <20220930210751.225873-1-scgl@linux.ibm.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: cy6BvvwuhQW2wWK6a76owBHuLw0jFZPQ X-Proofpoint-ORIG-GUID: yG4IYyw_GrFQY__GCBnTDXOab8NwZ7ki X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.528,FMLib:17.11.122.1 definitions=2022-09-30_04,2022-09-29_03,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 mlxscore=0 clxscore=1011 phishscore=0 bulkscore=0 malwarescore=0 spamscore=0 impostorscore=0 lowpriorityscore=0 priorityscore=1501 suspectscore=0 mlxlogscore=768 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000 definitions=main-2209300131 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org User space can use the MEM_OP ioctl to make storage key checked reads and writes to the guest, however, it has no way of performing atomic, key checked, accesses to the guest. Extend the MEM_OP ioctl in order to allow for this, by adding a cmpxchg mode. For now, support this mode for absolute accesses only. This mode can be use, for example, to set the device-state-change indicator and the adapter-local-summary indicator atomically. Janis Schoetterl-Glausch (9): s390/uaccess: Add storage key checked cmpxchg access to user space KVM: s390: Extend MEM_OP ioctl by storage key checked cmpxchg Documentation: KVM: s390: Describe KVM_S390_MEMOP_F_CMPXCHG KVM: s390: selftest: memop: Pass mop_desc via pointer KVM: s390: selftest: memop: Replace macros by functions KVM: s390: selftest: memop: Add bad address test KVM: s390: selftest: memop: Add cmpxchg tests KVM: s390: selftest: memop: Fix typo KVM: s390: selftest: memop: Fix wrong address being used in test Documentation/virt/kvm/api.rst | 18 +- include/uapi/linux/kvm.h | 5 + arch/s390/include/asm/uaccess.h | 187 ++++++ arch/s390/kvm/gaccess.h | 4 + arch/s390/kvm/gaccess.c | 56 ++ arch/s390/kvm/kvm-s390.c | 50 +- tools/testing/selftests/kvm/s390x/memop.c | 704 +++++++++++++++++----- 7 files changed, 874 insertions(+), 150 deletions(-) base-commit: f76349cf41451c5c42a99f18a9163377e4b364ff