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Mon, 10 Nov 2025 04:31:51 GMT Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0609A2004E; Mon, 10 Nov 2025 04:31:50 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8E62A20040; Mon, 10 Nov 2025 04:31:46 +0000 (GMT) Received: from li-4f5ba44c-27d4-11b2-a85c-a08f5b49eada.in.ibm.com (unknown [9.109.204.116]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 10 Nov 2025 04:31:46 +0000 (GMT) From: Sourabh Jain To: linux-kernel@vger.kernel.org Cc: Sourabh Jain , Aditya Gupta , Andrew Morton , Baoquan he , Dave Young , Hari Bathini , Jiri Bohac , Madhavan Srinivasan , Mahesh J Salgaonkar , Pingfan Liu , "Ritesh Harjani (IBM)" , Shivang Upadhyay , Vivek Goyal , linuxppc-dev@lists.ozlabs.org, kexec@lists.infradead.org Subject: [PATCH v3 0/5] kexec: reorganize sysfs interface and add new kexec sysfs Date: Mon, 10 Nov 2025 10:01:38 +0530 Message-ID: <20251110043143.484408-1-sourabhjain@linux.ibm.com> X-Mailer: git-send-email 2.51.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTA4MDAyMiBTYWx0ZWRfX1rnJ0LuOdoxy 7CJJcOI6ZLPP/T9i6lF8wmz+oCImw/xCTq3dhARayCL+SYoQK/6x6qkVvOf/wr3Bf+vjUVW1OBl zkCHme4SDnP/BbrlWFajK9Nwg2RyCKiEVvPcw9r2ldDgUDKh3Q9NOD3lzoXYon3CSgjdY3WeejP C2l63rPV6ffSasjw1PE6vuLv34sOwqPh7O1s/s5ZPFyVrbNI4zARR6Y/8e3cPhrVVRLJwtN0+Bk wkcOHcsTMcxlCw0DY3ypqce+ZvJLWs2d66efuCjkw1xTmtYP88e1sJMy7+NJQHR3jzLvbnPf3rP PNRcD9sLG1w6/iFLf0KY1nQMhA1K9uZBG1fmdg8aVeTXbVSMaSOF0ivib4NHcSdM1khuFDa7Y4l LUWCu+IBKl6qsylfesR8pUjsAuhaKA== X-Authority-Analysis: v=2.4 cv=ZK3aWH7b c=1 sm=1 tr=0 ts=69116abc cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=6UeiqGixMTsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VnNF1IyMAAAA:8 a=Z4Rwk6OoAAAA:8 a=20KFwNOVAAAA:8 a=pGLkceISAAAA:8 a=voM4FWlXAAAA:8 a=JfrnYn6hAAAA:8 a=LRU2jnFezOS3J6eLL00A:9 a=HkZW87K1Qel5hWWM3VKY:22 a=IC2XNlieTeVoXbcui8wp:22 a=1CNFftbPRP8L7MoqJWF3:22 a=cPQSjfK2_nFv0Q5t_7PE:22 X-Proofpoint-ORIG-GUID: uzFoxsjBYnAGMCBSO5nLYhimKGjpbOQl X-Proofpoint-GUID: o0rWVqbWpvX2ZpFvuTjHOykWXzciUBWy X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-10_01,2025-11-06_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 lowpriorityscore=0 priorityscore=1501 suspectscore=0 phishscore=0 impostorscore=0 spamscore=0 bulkscore=0 adultscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2510240000 definitions=main-2511080022 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251109_203159_425134_E3114322 X-CRM114-Status: GOOD ( 14.16 ) X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org All existing kexec and kdump sysfs entries are moved to a new location, /sys/kernel/kexec, to keep /sys/kernel/ clean and better organized. Symlinks are created at the old locations for backward compatibility and can be removed in the future [02/05]. While doing this cleanup, missing ABI documentation for the old sysfs interfaces is added, and those entries are marked as deprecated [01/05 and 03/05]. New ABI documentation is also added for the reorganized interfaces. [04/05] Along with this reorganization, a new sysfs file, /sys/kernel/kexec/crash_cma_ranges, is introduced to export crashkernel CMA reservation details to user space [05/05]. This helps tools determine the total crashkernel reserved memory and warn users that capturing user pages while CMA is reserved may cause incomplete or unreliable dumps. Changlog: --------- v2 -> v3: - Add the missing hunk to export crash_cma_ranges sysfs [05/05] - Declare kexec_kobj static [02/05] Cc: Aditya Gupta Cc: Andrew Morton Cc: Baoquan he Cc: Dave Young Cc: Hari Bathini Cc: Jiri Bohac Cc: Madhavan Srinivasan Cc: Mahesh J Salgaonkar Cc: Pingfan Liu Cc: Ritesh Harjani (IBM) Cc: Shivang Upadhyay Cc: Vivek Goyal Cc: linuxppc-dev@lists.ozlabs.org Cc: kexec@lists.infradead.org Sourabh Jain (5): Documentation/ABI: add kexec and kdump sysfs interface kexec: move sysfs entries to /sys/kernel/kexec Documentation/ABI: mark old kexec sysfs deprecated kexec: document new kexec and kdump sysfs ABIs crash: export crashkernel CMA reservation to userspace .../ABI/obsolete/sysfs-kernel-kexec-kdump | 59 ++++++++ .../ABI/testing/sysfs-kernel-kexec-kdump | 61 ++++++++ kernel/kexec_core.c | 135 ++++++++++++++++++ kernel/ksysfs.c | 68 +-------- 4 files changed, 256 insertions(+), 67 deletions(-) create mode 100644 Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump create mode 100644 Documentation/ABI/testing/sysfs-kernel-kexec-kdump -- 2.51.1