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Wed, 12 Aug 2026 19:07:13 +0000 (GMT) Received: from [9.87.128.143] (unknown [9.87.128.143]) by smtpav03.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 12 Aug 2026 19:07:13 +0000 (GMT) Message-ID: Date: Wed, 12 Aug 2026 21:07:12 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 19/33] KVM: s390: gmap: Make storage keys optional To: Steffen Eiden , kvm@vger.kernel.org, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Cc: Alexander Gordeev , Andreas Grapentin , Arnd Bergmann , Catalin Marinas , Claudio Imbrenda , David Hildenbrand , Friedrich Welter , Fuad Tabba , Gautam Gala , Hariharan Mari , Heiko Carstens , Hendrik Brueckner , Ilya Leoshkevich , Janosch Frank , Joey Gouly , Marc Zyngier , Nico Boehr , Nina Schoetterl-Glausch , Oliver Upton , Paolo Bonzini , Sean Christopherson , Suzuki K Poulose , Sven Schnelle , Ulrich Weigand , Vasily Gorbik , Will Deacon , Zenghui Yu References: <20260812153631.3376090-1-seiden@linux.ibm.com> <20260812153631.3376090-20-seiden@linux.ibm.com> Content-Language: en-US From: Christian Borntraeger In-Reply-To: <20260812153631.3376090-20-seiden@linux.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Authority-Analysis: v=2.4 cv=RsP16imK c=1 sm=1 tr=0 ts=6a7cc468 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=PCBwtEoN02dcB8kVq5UA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-GUID: e7pmWi42NJwRQlwXtePs6KkKlmNqGyDr X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODEyMDE1MyBTYWx0ZWRfXyGUZkT8MYv1x TlF8wjdWFsp0uYykCiFlcBqWlf00tU+XL11wPQfb7tGRwBLeYE9Q0ZANWiSFGKeC0agLkCnIauP rhK5RZowRZwsa6MJ7TE4hbXeekDkRqM4izfOunCEFaWyPFchX4hM3R3/bdj5uUkltFk60CnWkCS Kc5+QpzQdiIXLyfCSsuQ4kBeuw4K7Q8w48MpS53XpY2nUjneB4wdqfSjlH4GtODv1o/EBJzv6yb MZOjG2BQUvIi2mLqXK/Y+pRzvBJee6l0QlE+w5iQC1vHnmANr7TirjdigmrN3GjZRKDow4jMgK9 BXvZ5mQoA43jr6KdWnhHI8ig3g0FADJ/qvmGhR1U+6cdyflvKZ5/w2PUqEHSr5YyiOWsVgjDAIY JxjpHR+DahyiH6xCOk++5y12pgCO9MEsYFEMjkcKLVXDyMHxNsxanAjXwXVqI+Gn+ahstDf7e9j jVDTED2Pc1Hcl6dq18w== X-Proofpoint-ORIG-GUID: LVy9jCCWjEPlN33hC9kn7oMuJIEOs0Sh X-Proofpoint-Spam-Info: AW1haW4tMjYwODEyMDE1MyBTYWx0ZWRfX5BH9HXGn7ooG NPJI5JceKu6wd8i+9AO5kpenjzBz74mpjTxj4jNiV4vVhFpdH1pM9gw/u75ByORufmSagSMWmTD RxJzYyW01umkxTsOxxq9TMM0qW1qPnA= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-12_05,2026-08-12_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 impostorscore=0 suspectscore=0 clxscore=1015 malwarescore=0 phishscore=0 adultscore=0 lowpriorityscore=0 priorityscore=1501 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608120153 Am 12.08.26 um 17:36 schrieb Steffen Eiden: > Guard guest storage key handling behind `KVM_S390_MANAGES_S390_GUEST`. > This enables other KVM implementations to use gmap without implementing > storage key infrastructure. Define KVM_S390_MANAGES_S390_GUEST to 1 for > KVM hosts managing s390 guests (in kvm_host_s390.h). A KVM > implementation not implementing those features must define > KVM_S390_MANAGES_S390_GUEST to 0 in its kvm_host_.h. > > No functional changes besides the new guard. > > Signed-off-by: Steffen Eiden Maybe we find a better way in the future but this certainly works. Reviewed-by: Christian Borntraeger