linux-kernel - Re: [RFC PULL] remove arch/h8300

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <8f9be869-7244-d92a-4683-f9c53da97755@landley.net>
Date:   Fri, 8 Apr 2022 19:24:17 -0500
From:   Rob Landley <rob@...dley.net>
To:     Greg Ungerer <gerg@...ux-m68k.org>, Daniel Palmer <daniel@...f.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Christoph Hellwig <hch@...radead.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        "moderated list:H8/300 ARCHITECTURE" 
        <uclinux-h8-devel@...ts.sourceforge.jp>,
        "open list:TENSILICA XTENSA PORT (xtensa)" 
        <linux-xtensa@...ux-xtensa.org>, Max Filippov <jcmvbkbc@...il.com>,
        Linux-sh list <linux-sh@...r.kernel.org>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        Damien Le Moal <damien.lemoal@....com>,
        linux-riscv <linux-riscv@...ts.infradead.org>
Subject: Re: [RFC PULL] remove arch/h8300

On 4/5/22 08:07, Greg Ungerer wrote:
> Hi Daniel,
> 
> On 5/4/22 13:23, Daniel Palmer wrote:
>> On Mon, 4 Apr 2022 at 22:42, Greg Ungerer <gerg@...ux-m68k.org> wrote:
>>> But we could consider the Dragonball support for removal. I keep it compiling,
>>> but I don't use it and can't test that it actually works. Not sure that it
>>> has been used for a very long time now. And I didn't even realize but its
>>> serial driver (68328serial.c) was removed in 2015. No one seems too have
>>> noticed and complained.
>> 
>> I noticed this and I am working on fixing it up for a new Dragonball
>> homebrew machine.
>> I'm trying to add a 68000 machine to QEMU to make the development
>> easier because I'm currently waiting an hour or more for a kernel to
>> load over serial.
>> It might be a few months.

I've been booting Linux on qemu-system-m68k -M q800 for a couple years now? (The
CROSS=m68k target of mkroot in toybox?)

# cat /proc/cpuinfo
CPU:		68040
MMU:		68040
FPU:		68040
Clocking:	1261.9MHz
BogoMips:	841.31
Calibration:	4206592 loops

It certainly THINKS it's got m68000...

$ qemu-system-m68k -cpu ?
cfv4e
m5206
m5208
m68000
m68010
m68020
m68030
m68040
m68060
any

(I'd love to get an m68k nommu system working but never sat down and worked out
a kernel .config qemu agreed to run, plus compiler and libc. Musl added m68k
support but I dunno if that includes coldfire?)

>> It looked like 68328serial.c was removed because someone tried to
>> clean it up and it was decided that no one was using it and it was
>> best to delete it.
>> My plan was to at some point send a series to fix up the issues with
>> the Dragonball support, revert removing the serial driver and adding
>> the patch that cleaned it up.
> 
> Nice. I will leave all the 68000/68328 code alone for now then.

The q800 config uses CONFIG_SERIAL_PMACZILOG. Seems to work fine?

> Regards
> Greg

Rob