* Re: Emulating multi core processor (ARM cortex M7) on QEMU
[not found] <CAJSdhPiUcGuHmtZbgaN3Op5qqyDGacN1s9DeGJkmQrx6HL19VQ@mail.gmail.com>
@ 2024-02-26 11:09 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; only message in thread
From: Philippe Mathieu-Daudé @ 2024-02-26 11:09 UTC (permalink / raw)
To: ankita suman, qemu-discuss; +Cc: Gustavo Romero, QEMU Developers, qemu-arm
Hello,
On 26/2/24 11:58, ankita suman wrote:
> Hello,
>
> I am trying to emulate multi core processor (dual core for now) on QEMU.
> The processor I am targeting is cortex m7. I tried by running multiple
> instances of QEMU to emulate multi cores, and use shared memory for
> communication, but since I am working on a bare metal environment, I
> don't have the options of libraries for synchronization.
Have a look at the 'fby35' machine in hw/arm/fby35.c, it uses
a pair of Aspeed ast1030 and ast2600 ARM cores.
> Another approach I tried was using inter VM shared memory(ivshmem). But
> I am facing the same problem. I am able to write and read from the
> ivshmem device from two different QEMU instances, but it is not working
> for ARM.
Cc'ing Gustavo who worked on something similar and posted ivshmem
patches:
https://lore.kernel.org/qemu-devel/20240222222218.2261956-1-gustavo.romero@linaro.org/
> can someone please guide me on how to proceed and what is the best
> approach? If there are library support in QEMU for multi core emulation,
> kindly let me know, that would be helpful as well.
Regards,
Phil.
^ permalink raw reply [flat|nested] only message in thread