linux-kernel - Re: Trying to kexec on Allwinner A80

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Message-ID: <20200406092540.GB31279@Red>
Date:   Mon, 6 Apr 2020 11:25:40 +0200
From:   Corentin Labbe <clabbe.montjoie@...il.com>
To:     Russell King - ARM Linux admin <linux@...linux.org.uk>
Cc:     ebiederm@...ssion.com, kexec@...ts.infradead.org, wens@...e.org,
        linux-arm-kernel@...ts.infradead.org, mripard@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: Trying to kexec on Allwinner A80

On Mon, Apr 06, 2020 at 10:16:00AM +0100, Russell King - ARM Linux admin wrote:
> On Mon, Apr 06, 2020 at 10:27:20AM +0200, Corentin Labbe wrote:
> > Hello
> > 
> > I am trying to add the last missing Allwinner Soc in kernelci: the A80.
> > But this SoC does not have any way to be used in kernelci, no USB nor network in uboot.
> > So I have tried to fake uboot since the kernel has network support and run the new kernel via kexec.
> > 
> > But kexec 2.0.18 fail to work:
> > kexec --force /tmp/kernel --initrd /tmp/ramdisk --dtb /tmp/dtb --command-line='console=ttyS0,115200n8 root=/dev/ram0 earlycon=uart,mmio32,0x7000000 ip=dhcp'
> 
> What happens if you omit the dtb argument?
> 

No change without dtb

I have also tried to add --mem-mim and --mem-max without any change.
I given mem according to what I saw in /proc/iomem
20000000-9fffffff : System RAM
  20008000-207fffff : Kernel code
  20900000-209a0c87 : Kernel data
So I gave --mem-min 0x30000000 --mem-max 0x9fffffff
Anyway, the result is always the same.