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=-5.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,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 1B3D1C2D0EC for ; Sun, 12 Apr 2020 05:29:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E369D2051A for ; Sun, 12 Apr 2020 05:29:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725815AbgDLF30 (ORCPT ); Sun, 12 Apr 2020 01:29:26 -0400 Received: from kvm5.telegraphics.com.au ([98.124.60.144]:35380 "EHLO kvm5.telegraphics.com.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725878AbgDLF30 (ORCPT ); Sun, 12 Apr 2020 01:29:26 -0400 Received: from localhost (localhost.localdomain [127.0.0.1]) by kvm5.telegraphics.com.au (Postfix) with ESMTP id 244FF28D2C; Sun, 12 Apr 2020 01:29:22 -0400 (EDT) Date: Sun, 12 Apr 2020 15:29:19 +1000 (AEST) From: Finn Thain To: Rob Landley cc: linux-m68k@vger.kernel.org, Laurent Vivier Subject: Re: Running m68k on qemu with external initramfs? In-Reply-To: <0e69cfc4-3bcd-25c3-0d32-665ef50f815c@landley.net> Message-ID: References: <0e69cfc4-3bcd-25c3-0d32-665ef50f815c@landley.net> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-m68k-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-m68k@vger.kernel.org On Sat, 11 Apr 2020, Rob Landley wrote: > On 4/11/20 1:12 AM, Finn Thain wrote: > > On Fri, 10 Apr 2020, Rob Landley wrote: > > > >> I'm adding m68k support to toybox's "make root" target and I have a > >> kernel and a rootfs.cpio.gz, but qemu's -initrd option doesn't put the > >> rootfs image somewhere the m68k kernel can find it. > >> > >> Is this a "modify qemu" problem or a "modify kernel" problem? > > > > It sounds more like a "modify kernel .config" problem. But it could be a > > regression; what versions of qemu and kernel did you try? > > "Works for me", got it. I'll keep digging. > If you want to try a kernel binary that works for me, so as to narrow down the problem, you can get one from here: https://sourceforge.net/projects/linux-mac68k/files/ > QEMU is the one Laurent Vivier maintains that's been out of tree for > something like 12 years now, the default branch claims to be "q800-dev" > and the last commit was in december. Should be fine. For the last few months I've used mainline QEMU instead. > It still runs my old aboriginal linux system image from 2014 (boots to a > shell prompt). > > Kernel is vanilla v5.6 with the arch configured with: > > QEMU="m68k -M q800" KARCH=m68k KARGS=ttyS0 VMLINUX=vmlinux > KCONF=MMU,M68040,M68KFPU_EMU,MAC,SCSI_MAC_ESP,MACINTOSH_DRIVERS,ADB,ADB_MACII,NET_CORE,MACSONIC,SERIAL_PMACZILOG,SERIAL_PMACZILOG_TTYS,SERIAL_PMACZILOG_CONSOLE > > Which is top of: > > BASE=EARLY_PRINTK,BINFMT_ELF,BINFMT_SCRIPT,NO_HZ,HIGH_RES_TIMERS,BLK_DEV,BLK_DEV_INITRD,RD_GZIP,BLK_DEV_LOOP,EXT4_FS,EXT4_USE_FOR_EXT2,VFAT_FS,FAT_DEFAULT_UTF8,MISC_FILESYSTEMS,SQUASHFS,SQUASHFS_XATTR,SQUASHFS_ZLIB,DEVTMPFS,DEVTMPFS_MOUNT,TMPFS,TMPFS_POSIX_ACL,NET,PACKET,UNIX,INET,IPV6,NETDEVICES,NET_CORE,NETCONSOLE,ETHERNET > > As interpreted by: > > sed -E '/^$/d;s/([^,]*)($|,)/CONFIG_\1=y\n/g' <<< "$BASE,$KCONF > mini.conf > make ARCH=$KARCH allnoconfig KCONFIG_ALLCONFIG=mini.conf > make ARCH=$KARCH CROSS_COMPILE="$CROSS_COMPILE" -j $(nproc) > > Plus of course: > > echo "qemu-system-$QEMU" '"$@"' -nographic -no-reboot -m 256 \ > "-kernel $(basename "$VMLINUX") -initrd root.cpio.gz" \ > "-append \"quiet panic=1 HOST=$TARGET console=$KARGS \$KARGS\"" \ > ${DTB:+-dtb "$(basename "$DTB")"} > "$OUTPUT/qemu-$TARGET.sh" > That works for me, with a few tweaks: qemu-system-m68k -M q800 -serial none -serial mon:stdio -nographic -no-reboot -m 256 -kernel vmlinux-4.14.167-mac-backport+ -initrd sysroot.cpio.gz -append console=ttyS0 > I.E. the usual. This is my usual invocation: qemu-system-m68k -M q800 -m 992M -serial none -serial mon:stdio -g 800x600x4 -drive file=guest-root,format=raw -drive file=guest-swap,format=raw -append "fbcon=font:ProFont6x11 console=tty0 console=ttyS0 root=/dev/sda rw ignore_loglevel" -kernel vmlinux -net nic,model=dp83932,addr=00:00:00:01:02:03 -net bridge -rtc base=localtime > (I'm trying to add m68k support to > https://github.com/landley/toybox/blob/master/scripts/mkroot.sh which > already boots armv5l, armv7l, aarch64, i486, i686, x86_64, mips, mipsel, > powerpc, s390x, and sh4 to a shell prompt under qemu, although you still > have to KARGS=rdinit=/bin/sh because I haven't QUITE got my new shell > making it through the end of the init script. Should do in another > couple days.) > Nice! > Rob >