sorear changed the topic of #riscv to: RISC-V instruction set architecture | https://riscv.org | Logs: https://libera.irclog.whitequark.org/riscv
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<mort> is there a list of the extensions to rv32 linux needs?
<jrtc27> kernel makefiles have rvXXima as the baseline, with fd optional (come as a pair though), ditto c
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<mort> neat, thanks
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<mort> shouldn't kernels be able to make use of zicsr too?
<jrtc27> rvXXi means i2p0, not i2p1, and so predates zicsr and zifencei being split out
<jrtc27> or maybe toolchains were just lax about it early on
<jrtc27> either way, toolchains treat i as including both zicsr and zifencei
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<dh`> you can't do anything kernelish without zicsr
<dh`> and in practice the alternative to including zifencei is pretending you don't need such barriers, which is (on the software side) unwise
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<alkavan> hello, anyone around here know where I could get some help with HiFive1 board?
<jrtc27> forums.sifive.com?
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<jimwilson> on the gcc side, there have been discussions about making i2p1 the default, but we have found that it breaks a lot of software that doesn't explicitly specify zicsr and zifencei in the arch string
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