Re: [PATCH 3/5] ARM: dts: Add basic support for EcoNet EN7523

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On Sun, Aug 1, 2021 at 11:07 AM Bert Vermeulen <bert@xxxxxxxx> wrote:
> On 7/30/21 4:53 PM, Marc Zyngier wrote: On Fri, 30 Jul 2021 15:31:36 +0100,
> > Probably because that's not what it actually is. My bet is on A53 with
> > a crippled firmware.
>
> [    0.000000] Booting Linux on physical CPU 0x0
> [    0.000000] Linux version 5.14.0-rc3-00042-g3af70c6f8e95-dirty
> (bert@sumner) (arm-linux-gnueabi-gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0,
> GNU ld (GNU Binutils for Ubuntu) 2.34) #392 SMP Sun Aug 1 10:28:13 CEST 2021
> [    0.000000] CPU: ARMv7 Processor [410fd034] revision 4 (ARMv7), cr=10c5383d
> [    0.000000] CPU: div instructions available: patching division code
> [    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache

Good guess! CPUID 410fd034 is a Cortex-53 (d03) indeed. I wish we
would just print
cleartext names for the CPUs that the kernel already knows about here, I think
the fact that we just print 'ARMv7 processor' (which is wrong) and
spell out the revision
but not implementer/part/variant numbers is rather silly.

Is there a way in the boot loader to boot up a 64-bit kernel?

       Arnd



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