Re: Debugging heterogeneous SoC

[Alistair Francis]

On Tue, Jan 28, 2020 at 4:29 PM Nikita Ermakov <address@hidden> wrote:
>
> Hello,
>
> I am trying to debug the sifive_u SoC in the QEMU with GDB.
> SiFive Unleashed contains one E51 core and four U54 cores.
> In the hw/riscv/sifve_u.c E51 and U54 cores are placed in the different CPU 
> clusters.
> In the gdbstub.c, it is searches only the first cluster and it always finds 
> cluster with E51 core, if I understand it correctly.
> In the GDB with `info threads` I could see only E51 core but none of the U54 
> cores.
>
> Is it possible to somehow get an access to another CPU cluster in the 
> GDB/QEMU?

Use these commands to attach GDB to QEMU:

        target extended-remote :1234
        add-inferior
        inferior 2
        attach 2
        set schedule-multiple
        info threads

Alistair

>
> --
> Thanks,
> Nikita
> B8 00 4C CD 21