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From:   Michael Ellerman <mpe@ellerman.id.au>
To:     Michal Simek <michal.simek@xilinx.com>,
        Nathan Chancellor <natechancellor@gmail.com>,
        Michal Simek <michal.simek@xilinx.com>
Cc:     Christophe Leroy <christophe.leroy@csgroup.eu>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>, arnd@arndb.de,
        linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
        clang-built-linux@googlegroups.com
Subject: Re: [PATCH v5 01/13] powerpc: Remove Xilinx PPC405/PPC440 support
In-Reply-To: <87bllidmk4.fsf@mpe.ellerman.id.au>
References: <cover.1590079968.git.christophe.leroy@csgroup.eu> <8c593895e2cb57d232d85ce4d8c3a1aa7f0869cc.1590079968.git.christophe.leroy@csgroup.eu> <20200616002720.GA1307277@ubuntu-n2-xlarge-x86> <68503e5e-7456-b81c-e43d-27cb331a4b72@xilinx.com> <20200616181630.GA3403678@ubuntu-n2-xlarge-x86> <50fb2dd6-4e8f-a550-6eda-073beb86f2ff@xilinx.com> <87bllidmk4.fsf@mpe.ellerman.id.au>
Date:   Wed, 17 Jun 2020 20:21:04 +1000
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Michael Ellerman <mpe@ellerman.id.au> writes:
> Michal Simek <michal.simek@xilinx.com> writes:
<snip>

>> Or if bamboo requires uImage to be built by default you can do it via
>> Kconfig.
>>
>> diff --git a/arch/powerpc/platforms/44x/Kconfig
>> b/arch/powerpc/platforms/44x/Kconfig
>> index 39e93d23fb38..300864d7b8c9 100644
>> --- a/arch/powerpc/platforms/44x/Kconfig
>> +++ b/arch/powerpc/platforms/44x/Kconfig
>> @@ -13,6 +13,7 @@ config BAMBOO
>>         select PPC44x_SIMPLE
>>         select 440EP
>>         select FORCE_PCI
>> +       select DEFAULT_UIMAGE
>>         help
>>           This option enables support for the IBM PPC440EP evaluation board.
>
> Who knows what the actual bamboo board used. But I'd be happy to take a
> SOB'ed patch to do the above, because these days the qemu emulation is
> much more likely to be used than the actual board.

I just went to see why my CI boot of 44x didn't catch this, and it's
because I don't use the uImage, I just boot the vmlinux directly:

  $ qemu-system-ppc -M bamboo -m 128m -display none -kernel build~/vmlinux -append "console=ttyS0" -display none -nodefaults -serial mon:stdio
  Linux version 5.8.0-rc1-00118-g69119673bd50 (michael@alpine1-p1) (gcc (Ubuntu 9.3.0-10ubuntu2) 9.3.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #4 Wed Jun 17 20:19:22 AEST 2020
  Using PowerPC 44x Platform machine description
  ioremap() called early from find_legacy_serial_ports+0x690/0x770. Use early_ioremap() instead
  printk: bootconsole [udbg0] enabled


So that's probably the simplest solution?

cheers