linux-kernel - Re: [PATCH] m68k: defconfig: Update defconfigs for v5.4-rc1

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Date:   Mon, 4 Nov 2019 19:19:46 -0800
From:   Brad Boyer <flar@...andria.com>
To:     Finn Thain <fthain@...egraphics.com.au>
Cc:     John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Max Staudt <max@...as.org>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-ide@...r.kernel.org
Subject: Re: [PATCH] m68k: defconfig: Update defconfigs for v5.4-rc1

On Tue, Nov 05, 2019 at 01:33:00PM +1100, Finn Thain wrote:
> All the PB 190 machines that I've come across have a late revision 68LC040 
> CPU that is free of errata. Please see,
> http://www.mac.linux-m68k.org/docs/faq.php#sec-4.5
> 
> The Performa 636 is highly likely to be affected, but you can run Linux 
> from initramfs to avoid page faults in code sections. That would allow you 
> to test the IDE driver.
> 
> Or you can just replace the CPU with a full 68040, since it is socketed. 

I'll try the PB190 first anyway. It should be easier due to not needing
to setup a monitor. I'm not sure if I ever booted Linux on either of
them, since I acquired both about the time I started getting too busy
to spend time on such things. I just found the Performa, and it's actually
a Performa 630CD but I don't see any obvious difference based on the specs.

I just took a look at the macide driver, and it appears to do basically
nothing other than pass a list of addresses into the core ide code. It's
one of the smallest drivers I've ever seen.

> But watch out for leaking capacitors and batteries...

I should pull out every machine in my collection and look for those sorts
of issues. None of them have been checked in at least 5 or 6 years.

	Brad Boyer
	flar@...andria.com