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Thu, 23 Jul 2020 22:19:48 +0000 (GMT) Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2EF15C605B; Thu, 23 Jul 2020 22:19:45 +0000 (GMT) Received: from morokweng.localdomain (unknown [9.163.53.35]) by b03ledav006.gho.boulder.ibm.com (Postfix) with ESMTPS; Thu, 23 Jul 2020 22:19:44 +0000 (GMT) References: <159524918900.20855.17709718993097359220.stgit@hbathini.in.ibm.com> <159524948081.20855.1023953568610670370.stgit@hbathini.in.ibm.com> User-agent: mu4e 1.2.0; emacs 26.3 From: Thiago Jung Bauermann To: Hari Bathini Subject: Re: [PATCH v4 04/12] ppc64/kexec_file: avoid stomping memory used by special regions In-reply-to: <159524948081.20855.1023953568610670370.stgit@hbathini.in.ibm.com> Date: Thu, 23 Jul 2020 19:19:41 -0300 Message-ID: <877dut6fia.fsf@morokweng.localdomain> MIME-Version: 1.0 Content-Type: text/plain X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-07-23_09:2020-07-23, 2020-07-23 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 impostorscore=0 mlxscore=0 priorityscore=1501 lowpriorityscore=0 spamscore=0 mlxlogscore=808 bulkscore=0 adultscore=0 suspectscore=0 clxscore=1015 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007230151 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Pingfan Liu , Nayna Jain , Kexec-ml , Mahesh J Salgaonkar , Mimi Zohar , lkml , linuxppc-dev , Sourabh Jain , Petr Tesarik , Andrew Morton , Dave Young , Vivek Goyal , Eric Biederman Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Hari Bathini writes: > crashkernel region could have an overlap with special memory regions > like opal, rtas, tce-table & such. These regions are referred to as > exclude memory ranges. Setup this ranges during image probe in order > to avoid them while finding the buffer for different kdump segments. > Override arch_kexec_locate_mem_hole() to locate a memory hole taking > these ranges into account. > > Signed-off-by: Hari Bathini Reviewed-by: Thiago Jung Bauermann -- Thiago Jung Bauermann IBM Linux Technology Center