BPF calls to modules?

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Hi guys,

First, pardon my ignorance regarding BPF, the following might be silly.

We were wondering here https://patchwork.kernel.org/project/linux-riscv/patch/20210615004928.2d27d2ac@xhacker/ if BPF programs that now have the capability to call kernel functions (https://lwn.net/Articles/856005/) can also call modules function or vice-versa?

The underlying important fact is that in riscv, we are limited to 2GB offset to call functions and that restricts where we can place modules and BPF regions wrt kernel (see Documentation/riscv/vm-layout.rst for the current possibly wrong layout).

So should we make sure that modules and BPF lie in the same 2GB region?

Thanks,

Alex



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