Comment 6 for bug 1579327

Does -smp cores=4 means qemu is emulaing versatile espress a9 with 4 cores ( this is how versatile express board is designed - i mean it's a board with 4 cores cotex a9 ) and qemu without -smp parameter emalates jus single core ( unicore )?

In case of versatile express a9 u-boot binary:

U-boot was compilled from cofig file vexpress_ca9x4 - versatile express cortex a9 4cores

U-boot configuration file is created to run on physical versatile a9 board. And this was confirmed by Tom Rini ( the head custodian of Das U-boot project as I see on his stackoverflow page ) to run without problems on physical 4 core versatile express a9 board ( see stackoverflow disscussion link in 1st message of this bug report ):

Here is citation of his comment:

>I have recently gotten confirmation that the real HW does work on current mainline U-Boot,
> but I can also replicate your failures. Interestingly, the real board is 4 cores,
> and I can (with the kernelci.org Linux kernel / device tree) run with -smp cores=2
> but 3 and 4 result in soft lockups once userland starts. – Tom Rini 2 days ago

So he even had more erors as he get further in linux boot process ( I stopped tests so far on just loading u-boot and waiting few minutes if it will fail suddenly, what happend ). As I said errors were quiet random, and sometimes appeard just after more than minute of inactivity, other times almost instantly after boot ).