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Mon, 3 Aug 2026 17:21:44 +0000 (GMT) From: Heiko Carstens To: Alexander Gordeev , Sven Schnelle , Vasily Gorbik , Christian Borntraeger , Claudio Imbrenda Cc: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/4] s390/mm: Add __context_unsafe() attribute to do_secure_storage_access() Date: Mon, 3 Aug 2026 19:21:42 +0200 Message-ID: <20260803172144.827049-3-hca@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260803172144.827049-1-hca@linux.ibm.com> References: <20260803172144.827049-1-hca@linux.ibm.com> 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: MshYhiOWXYzIylDNS7kgOWaYlMPWryrS X-Proofpoint-ORIG-GUID: MshYhiOWXYzIylDNS7kgOWaYlMPWryrS X-Proofpoint-Spam-Info: AW1haW4tMjYwODAzMDE1NCBTYWx0ZWRfX0kyRPWWkVKpC 2N9D+Eh7f32DzNV3D2cH5tyBB+RZInlUrdoPQmXm0w+LkPfr1aviaSzQyZdLR8/yq9q2QV5zx1C URdM29dGvKlnMpyHOEWsrdYotIt8Z5A= X-Authority-Analysis: v=2.4 cv=K8cS2SWI c=1 sm=1 tr=0 ts=6a70ce2d cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=As_xCgHIpSFzjsy36Q0A:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODAzMDE1NCBTYWx0ZWRfX2cNV+SDSAWIL SdwREIrvvDFb3Z8jAEAUg2MDz6HWx1tAOZOEPwUEu48Mn19xdF0fG8bDZQEpmxy3NFRWIlzHX57 4dh4xk7mPQPsAGS0TQU4EpqDVp2pK9/kLB2nX1fRNyFRPh8FOgBvTxNs6TRmXlpmS+YwaQMOd+V nrafuh06X71FWEJcANcfdFG1OhOtv+M1X26IB/5xhwFQQLmzUsLofDeq7H9Y6Cd7wWIoOMkqWSJ txqGQy0QvhxXuaJkSohQ0FGHgkRMdyVTt4rjcYiBz39Ap7e5ST20NIYw9xBektzA8OFWvQuKWQ9 f8iP6CsVvru0v9qSNf1e+Z2qYRwpbDmLKnCRhv1gDEbDiV10V7rpX8jsmcAZMYZrMpK8LmcOkks whS5tx52G6a9aVVJ6vjOpIb8+apJmSUOdGkMDVJPnE3C/Lub4m+yVCymQKnEZI/YLsXA7JSG94H tmg8aDrXdaoowcED/3w== 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=2026-08-03_04,2026-08-03_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 spamscore=0 impostorscore=0 bulkscore=0 priorityscore=1501 lowpriorityscore=0 malwarescore=0 phishscore=0 suspectscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608030154 Compiling do_secure_storage_access() with context analysis enabled results in this warning: arch/s390/mm/fault.c:472:3: warning: releasing spinlock 'fw.ptl' that was not held 472 | folio_walk_end(&fw, vma); Problem is that folio_walk_end() comes without the required context analysis attribute. Also the proper attribute cannot be added easily, since folio_walk_end() is a macro, and not a function. For the time being disable context analysis only for do_secure_storage_access() until this is resolved. Signed-off-by: Heiko Carstens --- arch/s390/mm/fault.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index 028aeb9c48d6..5af448fca962 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -406,6 +406,7 @@ NOKPROBE_SYMBOL(do_dat_exception); #if IS_ENABLED(CONFIG_KVM) void do_secure_storage_access(struct pt_regs *regs) +__context_unsafe(/* folio_walk_end() not instrumented */) { union teid teid = { .val = regs->int_parm_long }; unsigned long addr = get_fault_address(regs); -- 2.53.0