NXP P50XX/e5500: SMP doesn't work anymore with the latest Git kernel

[Christian Zigotzky]

On 07 November 2018 at 03:11AM, Scott Wood wrote:
> On Sun, 2018-10-28 at 17:35 +0100, Christian Zigotzky wrote:
>> Hello,
>>
>> SMP doesn't work anymore with the latest Git kernel (28/10/18 11:12AM
>> GMT) on my P5020 board and on virtual e5500 QEMU machines.
>>
>> Board with P5020 dual core CPU:
>>
>> [    0.000000] -----------------------------------------------------
>> [    0.000000] phys_mem_size     = 0x200000000
>> [    0.000000] dcache_bsize      = 0x40
>> [    0.000000] icache_bsize      = 0x40
>> [    0.000000] cpu_features      = 0x00000003008003b4
>> [    0.000000]   possible        = 0x00000003009003b4
>> [    0.000000]   always          = 0x00000003008003b4
>> [    0.000000] cpu_user_features = 0xcc008000 0x08000000
>> [    0.000000] mmu_features      = 0x000a0010
>> [    0.000000] firmware_features = 0x0000000000000000
>> [    0.000000] -----------------------------------------------------
>> [    0.000000] CoreNet Generic board
>>
>>       ...
>>
>> [    0.002161] smp: Bringing up secondary CPUs ...
>> [    0.002339] No cpu-release-addr for cpu 1
>> [    0.002347] smp: failed starting cpu 1 (rc -2)
>> [    0.002401] smp: Brought up 1 node, 1 CPU
>>
>> Virtual e5500 quad core QEMU machine:
>>
>> [    0.026394] smp: Bringing up secondary CPUs ...
>> [    0.027831] No cpu-release-addr for cpu 1
>> [    0.027989] smp: failed starting cpu 1 (rc -2)
>> [    0.030143] No cpu-release-addr for cpu 2
>> [    0.030304] smp: failed starting cpu 2 (rc -2)
>> [    0.032400] No cpu-release-addr for cpu 3
>> [    0.032533] smp: failed starting cpu 3 (rc -2)
>> [    0.033117] smp: Brought up 1 node, 1 CPU
>>
>> QEMU command: ./qemu-system-ppc64 -M ppce500 -cpu e5500 -m 2048 -kernel
>> /home/christian/Downloads/vmlinux-4.20-alpha4-
>> AmigaOne_X1000_X5000/X5000_and_QEMU_e5500/uImage-4.20
>> -drive
>> format=raw,file=/home/christian/Downloads/MATE_PowerPC_Remix_2017_0.9.img,in
>> dex=0,if=virtio
>> -nic user,model=e1000 -append "rw root=/dev/vda" -device virtio-vga
>> -device virtio-mouse-pci -device virtio-keyboard-pci -usb -soundhw
>> es1370 -smp 4
>>
>> .config:
>>
>> ...
>> CONFIG_SMP=y
>> CONFIG_NR_CPUS=4
>> ...
>>
>> Please test the latest Git kernel on your NXP P50XX boards.
> I wasn't able to reproduce this with top-of-tree (commit 8053e5b93eca9b) with
> either qemu (e5500 on ppce500) or a hardware t4240.
>
> -Scott
>
>
Hi Scott,


Thanks for testing but your test was too late because Rob Herring fixed 
this issue last week. [1]


Cheers,

Christian


[1] 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c961cb3be9064d1097ccc019390f8b5739daafc6