riscv_isa_extension_base(9)

💅 riscv_isa_extension_base(9) 💅

okay so bestie, welcome to the Kernel API Manual — this is riscv_isa_extension_base, and she is literally the moment you need to grab the base extension word. that's the whole vibe. let's get into it 🎀

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✨ NAME ✨

riscv_isa_extension_base — get base extension word. that's it, that's the function, no cap 🫶

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🌸 SYNOPSIS 🌸

unsigned long riscv_isa_extension_base (const unsigned long *isa_bitmap
);

like yes she takes one pointer and hands you back an unsigned long. iconic behavior honestly 💅

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🦋 ARGUMENTS 🦋

• isa_bitmap — the ISA bitmap you want to use. that's the input, that's the tea. 🍓

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🔥 RETURN 🔥

she gives you the base extension word back, as an unsigned long value. periodt. 👑

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💜 NOTE 💜

ngl this part matters: if isa_bitmap is NULL, then the Host ISA bitmap will be used instead. so like, no bitmap? no problem, she'll just pull the host one. don't forget it fr fr 🙈

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🌈 SEE ALSO 🌈

• kernel file ./arch/riscv/kernel/cpufeature.c — go read her, she's right there 👀
• __riscv_isa_extension_available(9) — the friend in the group chat you should also check out 💖

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okay that's the page!! tysm for reading bestie, go forth and check those extensions 🌸🦋

mwah 💋 — this lil number lives in ./arch/riscv/kernel, dated October 2026, and yes she's serving the full Kernel API Manual realness. see u in the next one, ily 🫶✨