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rsta2 / circle

A C++ bare metal environment for Raspberry Pi with USB (32 and 64 bit)
https://circle-rpi.readthedocs.io
GNU General Public License v3.0
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Raspberry Pi 4 : MultiCore support under QEMU #486

Open stephaneweg opened 1 month ago

stephaneweg commented 1 month ago

hi, i am able to run Circle on qemu using the following command: "c:\Program Files\qemu\qemu-system-aarch64" -machine raspi4b -cpu cortex-a72 -smp 4 -m 2G -kernel c:\temp\circle.img

it boots correctly, except that when i call the initalize method of CMultiCoreSupport , it can not start the other core. there is a message "CPU core 1 did not start"; this log is reported when it checks, that the secondary cores responded

Have you experienced the same issue ? what are the correct parameters for qemu ?

rsta2 commented 1 month ago

I can reproduce this with an older QEMU version. I think your command line is OK. I'm afraid there is no quick solution for this. I tried sample/26- cpustress again on a real RPi 4B 2GB with multi-core support and it's working well there. It is priority for Circle, that it works on the real hardware.

stephaneweg commented 1 month ago

I know, multi core works well on my rpi too, i was wondering if there is a solution for qemu