Received: by 2002:a25:ca44:0:0:0:0:0 with SMTP id a65csp165840ybg; Mon, 27 Jul 2020 19:13:52 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwPx2/oSTatOh4fGrxLzE9tG8GxvriGDhRUIA+xnzB/lp0NQ6tB8HtO3fgFemOYsYsHSt2o X-Received: by 2002:a17:906:3789:: with SMTP id n9mr24870219ejc.512.1595902432768; Mon, 27 Jul 2020 19:13:52 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1595902432; cv=none; d=google.com; s=arc-20160816; b=SbTHzvWN2tiMhyf2gJgh4zAMT32Sb+KTzNdYYTiatUma+nLaNa9Z6l4JiWEc5TAQil AsI2LPDodflBitvpLwIfnR7skuHl9LwkWteeUmuicSRDfmodRa8PAUAUiAFJ7m9bTTtg CwBy5E44Uc6H5F2PiWYN5yLtMZ1Q0DcdTsUSw506qFf4Jc8RiU6bMBiGAhO/N6iLinIP R724/xFmHrL555Dn14jLBXRQ+BT1tQ3VTNejQD2qaTuB9pJLl024F6Pwxn+oPGxFCLnY m7eE0itSzYCyh8l8KUriIaspIh6cFlGcr1/jcTA4hMbkUtZ3sHmBZvFKPkBsvL77unzS pmxw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:message-id:date:in-reply-to :subject:cc:to:from:user-agent:references; bh=O/ZpfzYDOlw/9XhwZp1bP71c65llyyw+QSMGmucfbiI=; b=vjYwoj9HBEF0GQaQurT8T/FiArnteJyYy8dThUk8bXKP11WhJNc1ecDdXQIWJMg5a4 Eis9/kUlXEfmIBpAikT+T/ze8sbh9SHIOlETPlSNRusN6/dFtuTa++Wo5FimMGM/7irN iyscN5SH+zyvojlqSLIbKY1/RQNuIuxqi1OPIP83oyOZNnisLQZdpuKiSYcyWnZvJ0dv dgmnoppbdOBec6j44wWCBzejGLfzaT6fY9oVeGJd9BrpKaXI6/7MbA8WDIzCPEBu/iNO b70oGXf0kjc2S+8V4c2W4g0TX+xuO3p4y+yGNTdv6QkrkB7dVWMZogJtf03IoxQWJeDH s6cQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=ibm.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id w23si7068064edx.588.2020.07.27.19.13.27; Mon, 27 Jul 2020 19:13:52 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=ibm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726575AbgG1CKb (ORCPT + 99 others); Mon, 27 Jul 2020 22:10:31 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:17606 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726268AbgG1CKb (ORCPT ); Mon, 27 Jul 2020 22:10:31 -0400 Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 06S226rB086461; Mon, 27 Jul 2020 22:10:19 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 32j7swc3pb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 27 Jul 2020 22:10:19 -0400 Received: from m0098404.ppops.net (m0098404.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 06S258N0100132; Mon, 27 Jul 2020 22:10:18 -0400 Received: from ppma03wdc.us.ibm.com (ba.79.3fa9.ip4.static.sl-reverse.com [169.63.121.186]) by mx0a-001b2d01.pphosted.com with ESMTP id 32j7swc3nt-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 27 Jul 2020 22:10:18 -0400 Received: from pps.filterd (ppma03wdc.us.ibm.com [127.0.0.1]) by ppma03wdc.us.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 06S29NH4016642; Tue, 28 Jul 2020 02:10:17 GMT Received: from b03cxnp08026.gho.boulder.ibm.com (b03cxnp08026.gho.boulder.ibm.com [9.17.130.18]) by ppma03wdc.us.ibm.com with ESMTP id 32gcy5drnh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 28 Jul 2020 02:10:17 +0000 Received: from b03ledav005.gho.boulder.ibm.com (b03ledav005.gho.boulder.ibm.com [9.17.130.236]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 06S2ACxq63832510 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 28 Jul 2020 02:10:12 GMT Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DA118BE053; Tue, 28 Jul 2020 02:10:15 +0000 (GMT) Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 63163BE051; Tue, 28 Jul 2020 02:10:12 +0000 (GMT) Received: from morokweng.localdomain (unknown [9.211.132.76]) by b03ledav005.gho.boulder.ibm.com (Postfix) with ESMTPS; Tue, 28 Jul 2020 02:10:12 +0000 (GMT) References: <159579157320.5790.6748078824637688685.stgit@hbathini> <159579231812.5790.16096865978767385505.stgit@hbathini> User-agent: mu4e 1.2.0; emacs 26.3 From: Thiago Jung Bauermann To: Hari Bathini Cc: Michael Ellerman , Andrew Morton , Mahesh J Salgaonkar , Sourabh Jain , Vivek Goyal , Dave Young , Petr Tesarik , linuxppc-dev , Kexec-ml , lkml , Pingfan Liu , Eric Biederman , Mimi Zohar , Nayna Jain Subject: Re: [RESEND PATCH v5 06/11] ppc64/kexec_file: restrict memory usage of kdump kernel In-reply-to: <159579231812.5790.16096865978767385505.stgit@hbathini> Date: Mon, 27 Jul 2020 23:10:08 -0300 Message-ID: <87ft9cxudb.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=2020-07-27_16:2020-07-27,2020-07-27 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 mlxlogscore=999 clxscore=1015 spamscore=0 priorityscore=1501 impostorscore=0 mlxscore=0 suspectscore=0 phishscore=0 adultscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007280009 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hari Bathini writes: > Kdump kernel, used for capturing the kernel core image, is supposed > to use only specific memory regions to avoid corrupting the image to > be captured. The regions are crashkernel range - the memory reserved > explicitly for kdump kernel, memory used for the tce-table, the OPAL > region and RTAS region as applicable. Restrict kdump kernel memory > to use only these regions by setting up usable-memory DT property. > Also, tell the kdump kernel to run at the loaded address by setting > the magic word at 0x5c. > > Signed-off-by: Hari Bathini > Tested-by: Pingfan Liu I liked the new versions of get_node_path_size() and get_node_path(). Reviewed-by: Thiago Jung Bauermann -- Thiago Jung Bauermann IBM Linux Technology Center