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=-3.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 C0771CA9EB9 for ; Wed, 23 Oct 2019 21:21:40 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 8ADB92086D for ; Wed, 23 Oct 2019 21:21:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8ADB92086D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=davemloft.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 1579F6B0003; Wed, 23 Oct 2019 17:21:40 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 109126B0006; Wed, 23 Oct 2019 17:21:40 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id F39696B0007; Wed, 23 Oct 2019 17:21:39 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0001.hostedemail.com [216.40.44.1]) by kanga.kvack.org (Postfix) with ESMTP id D237E6B0003 for ; Wed, 23 Oct 2019 17:21:39 -0400 (EDT) Received: from smtpin18.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with SMTP id 6757183F5 for ; Wed, 23 Oct 2019 21:21:39 +0000 (UTC) X-FDA: 76076321118.18.field03_65b726f2b9322 X-HE-Tag: field03_65b726f2b9322 X-Filterd-Recvd-Size: 2982 Received: from shards.monkeyblade.net (shards.monkeyblade.net [23.128.96.9]) by imf22.hostedemail.com (Postfix) with ESMTP for ; Wed, 23 Oct 2019 21:21:38 +0000 (UTC) Received: from localhost (unknown [IPv6:2601:601:9f00:1e2::d71]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id 5FA2B148EA243; Wed, 23 Oct 2019 14:21:36 -0700 (PDT) Date: Wed, 23 Oct 2019 14:21:33 -0700 (PDT) Message-Id: <20191023.142133.1980049426362664052.davem@davemloft.net> To: rppt@kernel.org Cc: linux-mm@kvack.org, akpm@linux-foundation.org, anton.ivanov@cambridgegreys.com, arnd@arndb.de, geert@linux-m68k.org, green.hu@gmail.com, gerg@linux-m68k.org, deller@gmx.de, James.Bottomley@HansenPartnership.com, jdike@addtoit.com, kirill@shutemov.name, torvalds@linux-foundation.org, msalter@redhat.com, mattst88@gmail.com, monstr@monstr.eu, richard@nod.at, linux@armlinux.org.uk, sammy@sammy.net, deanbo422@gmail.com, Vineet.Gupta1@synopsys.com, linux-alpha@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-c6x-dev@linux-c6x.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-parisc@vger.kernel.org, linux-um@lists.infradead.org, sparclinux@vger.kernel.org, rppt@linux.ibm.com Subject: Re: [PATCH v2 09/12] sparc32: use pgtable-nopud instead of 4level-fixup From: David Miller In-Reply-To: <20191023195859.GA24394@rapoport-lnx> References: <1571822941-29776-1-git-send-email-rppt@kernel.org> <1571822941-29776-10-git-send-email-rppt@kernel.org> <20191023195859.GA24394@rapoport-lnx> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Wed, 23 Oct 2019 14:21:37 -0700 (PDT) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Mike Rapoport Date: Wed, 23 Oct 2019 22:59:00 +0300 > I've just discovered that I've booted qemu-sparc with the wrong kernel and > this patch crashes miserably :( > > The better version that does allow qemu-sparc to boot with folded page > tables is below: > > > From a90e1d157b7f8786a4276ffc8553f2167c8bc0e7 Mon Sep 17 00:00:00 2001 > From: Mike Rapoport > Date: Tue, 1 Oct 2019 17:14:38 +0300 > Subject: [PATCH v2] sparc32: use pgtable-nopud instead of 4level-fixup > > 32-bit version of sparc has three-level page tables and can use > pgtable-nopud and folding of the upper layers. > > Replace usage of include/asm-generic/4level-fixup.h with > include/asm-generic/pgtable-nopud.h and adjust page table manipulation > macros and functions accordingly. > > Signed-off-by: Mike Rapoport Acked-by: David S. Miller