mount: permission denied (are you root?) when loading from SD card

[Mariam]

Hello Openpiton Group!

I have tried building a linux image from the following ariane-sdk branches and i still get this error when I boot from SD card.

note: while cloning i had to apply some patches to libfakeroot.c and c-stack,c files as well as cloning pixman from a different source as I had trouble cloning it.

https://github.com/Jbalkind/ariane-sdk/tree/openpiton

https://github.com/Jbalkind/ariane-sdk/tree/openpiton-elf-fix

https://github.com/openhwgroup/cva6-sdk/tree/openpiton

I have even tried building an image using this branch https://github.com/Jbalkind/ariane-sdk/tree/openpiton-opensbi but it keeps getting stuck.

Thank you,

Mariam

[Jonathan Balkind]

Hi Mariam,

This is very peculiar. Could you tell me what kind of modifications you've made to openpiton/ariane or to the linux environment?

My immediate guess would be that the rootfs isn't properly being included in the linux+opensbi blob. Perhaps either the build failed for that part and you didn't notice or the rootfs (+linux?) is too large for what is copied by the zsbl. If it's the latter then you can increase the size of the sd_copy inside piton/design/chipset/rv64_bootrom/linux (assuming you're using openpiton-dev). We usually size this up to about 32-64MB just to make life more convenient, though it does lengthen the copying time.

Thanks,

Jon

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[Mariam]

Hello Jon,

Thank you for the suggestion, I'll implement it and see how it goes.

For the modifications, I have attached a pdf file detailing all the errors I got from the moment I cloned the repo to generating the bbl and the modifications done to fix them.

I have realized that i attached the wrong screenshot as to where the openpiton-opensbi image gets stuck, so I attached it again.

and again thank you so much!

Regards,

Mariam

[Mariam]

I have managed to solve the issue from this arcane-sdk branch https://github.com/openhwgroup/cva6-sdk/tree/openpiton by replacing the contents of .. /cva6-sdk/buildroot/package/fakeroot with files from https://github.com/buildroot/buildroot/tree/2021.08.x/package/fakeroot not sure if this is the best way to fix it but it works fine for me so far.

I also downloaded this patch https://github.com/buildroot/buildroot/blob/2021.08.x/package/m4/0003-c-stack-stop-using-SIGSTKSZ.patch and placed it inside ../cva6-sdk/buildroot/package/m4

Increasing the sd_copy solved another issue I had when copying the boot image blocks, since my rootfs folder was too large. So thank you Jon for mentioning that!

Regards,

Mariam

[Jonathan Balkind]

Hi Mariam,

This is honestly quite a surprise. I still don't have any intuition for why the issue was occurring for you in the first place. I'm glad you got it resolved though :) Happy to give input if you hit further issues!

Thanks,

Jon

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