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Using Xilinx Tools Forum Petalinux 2018.2. Linux. Only one CPU works. Why?

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Petalinux 2018.2. Linux. Only one CPU works. Why?

Former Member over 3 years ago

Petalinux 2018.2; picoZed-7020; Linux kernel unable to bring up second CPU (SMP is enabled). Kernel log:

...

CPU: Testing write buffer coherency: ok

CPU0: thread -1, cpu 0, socket 0, mpidr 80000000

Setting up static identity map for 0x100000 - 0x100060

Hierarchical SRCU implementation.

smp: Bringing up secondary CPUs ...

CPU1: failed to boot: -1

smp: Brought up 1 node, 1 CPU

SMP: Total of 1 processors activated (666.66 BogoMIPS).

CPU: All CPU(s) started in SVC mode.

devtmpfs: initialized

...

Why kernel failed to activate both CPU?

0 Former Member over 3 years ago

The same thing was with pz7020_fmc2_2017_4.bsp. Ready binaries from this bsp is unable to bring up second cpu on my pz7020 board. Is there way to fix this problem?
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0 Former Member over 3 years ago

The second CPU is working on zedboard 7010 but not on microzed 7020 after kernel 4.xx! Avnet please fix that bug, I need the second core too!
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0 Former Member over 3 years ago in reply to Former Member

For some reason bit 7 in the efuse status register is set. Highly likely this is AR65240 case. Older versions of kernel does not check this bit.
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0 Former Member over 3 years ago in reply to Former Member

I don't think this is the root cause of the problem, this topic says it meet the efuse criteria: http://zedboard.org/content/efuse-integrity
Did anyone observe this on the 7010, or only on 7020?
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