From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 61C7FC43381 for ; Tue, 19 Feb 2019 06:02:21 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D5FBB2173C for ; Tue, 19 Feb 2019 06:02:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D5FBB2173C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 443VWG6B7JzDqKg for ; Tue, 19 Feb 2019 17:02:18 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=aneesh.kumar@linux.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 443VSr3vhJzDqJf for ; Tue, 19 Feb 2019 17:00:12 +1100 (AEDT) Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x1J5woVw050279 for ; Tue, 19 Feb 2019 01:00:10 -0500 Received: from e14.ny.us.ibm.com (e14.ny.us.ibm.com [129.33.205.204]) by mx0a-001b2d01.pphosted.com with ESMTP id 2qr96qgbh1-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 19 Feb 2019 01:00:10 -0500 Received: from localhost by e14.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 19 Feb 2019 06:00:06 -0000 Received: from b01ledav003.gho.pok.ibm.com (b01ledav003.gho.pok.ibm.com [9.57.199.108]) by b01cxnp23034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x1J605qK23134406 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 19 Feb 2019 06:00:05 GMT Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7D7A5B205F; Tue, 19 Feb 2019 06:00:05 +0000 (GMT) Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4AF16B207F; Tue, 19 Feb 2019 06:00:03 +0000 (GMT) Received: from [9.85.75.25] (unknown [9.85.75.25]) by b01ledav003.gho.pok.ibm.com (Postfix) with ESMTP; Tue, 19 Feb 2019 06:00:02 +0000 (GMT) Subject: Re: [RFC PATCH 2/2] powerpc/mm/hash64: Map all the kernel mapping in the same 0xc range To: Nicholas Piggin , Akshay Adiga , benh@kernel.crashing.org, Daniel Axtens , mpe@ellerman.id.au, paulus@samba.org References: <20190217051609.24140-1-aneesh.kumar@linux.ibm.com> <20190217051609.24140-2-aneesh.kumar@linux.ibm.com> <1550555813.fmra4d124d.astroid@bobo.none> From: "Aneesh Kumar K.V" Date: Tue, 19 Feb 2019 11:30:01 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.0 MIME-Version: 1.0 In-Reply-To: <1550555813.fmra4d124d.astroid@bobo.none> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 19021906-0052-0000-0000-0000038C9878 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00010624; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000281; SDB=6.01163167; UDB=6.00607314; IPR=6.00943748; MB=3.00025651; MTD=3.00000008; XFM=3.00000015; UTC=2019-02-19 06:00:08 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19021906-0053-0000-0000-00005FE5515F Message-Id: <61b935a8-6fb2-e1ec-15cb-fbe4f293fe80@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-02-19_04:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=989 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1902190046 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: linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 2/19/19 11:28 AM, Nicholas Piggin wrote: > Aneesh Kumar K.V's on February 17, 2019 3:16 pm: >> This patch maps vmap, IO and vmemap regions in the 0xc address range >> instead of the current 0xd and 0xf range. This brings the mapping closer >> to radix translation mode. > > What was the reason for that address layout in the first place? > To bring in closer to radix translation mode and it should also help with KASAN implementation. -aneesh