STRUCT PAPR_SYSPARM_BUF(9)

🌸 struct papr_sysparm_buf(9) 🌸

okay bestie, welcome to the Kernel API Manual, section 9 — today's main character is struct papr_sysparm_buf, and honestly? she's a little layout queen 💅

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🎀 NAME 🎀

struct papr_sysparm_buf — the RTAS work area layout for system parameter functions. that's it, that's the vibe ✨

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🦋 SYNOPSIS 🦋

struct papr_sysparm_buf {
    __be16 len;
    u8 val[PAPR_SYSPARM_MAX_OUTPUT];
 };

like, look at her. two members. zero notes. iconic 🫶

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🧚 MEMBERS 🧚

ngl the page doesn't spell out extra member-by-member commentary here beyond what you already see in the synopsis above — so we're not gonna invent any 🙈 the struct itself is literally right there in the SYNOPSIS, go off king 👑

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✨ DESCRIPTION ✨

okay so here's the tea ☕ — this struct is the memory layout of the buffers that get passed to and from ibm,get-system-parameter and ibm,set-system-parameter. those are the RTAS calls, and this is the shape of the work area you hand them. slay 💖

and the important little detail: this thing is distinct from the papr_sysparm_io_block structure — that's the other one, the one that gets passed between user space and the kernel. different struct, different job, don't mix them up bestie 😭✋

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💅 SEE ALSO 💅

• the kernel file ./arch/powerpc/include/asm/papr-sysparm.h — go read it, iykyk 📖

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and that's the whole page, bestie — short, sweet, and struct-shaped 🍓

signing off from ./arch/powerpc/include/asm, dated October 2026 — catch you in the next manpage, mwah 💜🦋✨