On 9 May 2016 at 13:47, embedded0n3 <jainformat...@interia.pl> wrote: > 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 )?
Yes. > 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 ). The next phase is that somebody needs to debug what the u-boot code is doing that causes it to crash (this is largely working with the guest code, not trying to debug QEMU itself). thanks -- PMM
