pat_bp_init(9)

💅 pat_bp_init(9) — Kernel API Manual ✨

okay so bestie, we're looking at pat_bp_init(9) today, from the Kernel API Manual, and honestly? she's a baddie with a very specific job. let's get into it 🎀

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🌸 NAME 🌸

pat_bp_init — literally just here to initialize the PAT MSR value and the PAT table. that's the whole vibe. no cap. 💖

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✨ SYNOPSIS ✨

void pat_bp_init (void );

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🦋 ARGUMENTS 🦋

• void — no arguments, bestie. zero. nada. she takes nothing and she gives everything 🫶

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🔥 DESCRIPTION 🔥

okay so here's the tea ☕ — this function initializes the PAT MSR value and the PAT table with an OS-defined value, and the whole point of that is to enable additional cache attributes: WC, WT and WP. slay 💅

and not only that, she also prepares the calls of pat_cpu_init via cache_cpu_init on all CPUs. like, every single one. main character energy fr fr 👑

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🌈 SEE ALSO 🌈

• Kernel file ./arch/x86/mm/pat/memtype.c lookup_memtype(9)
• pat_pfn_immune_to_uc_mtrr(9)
• memtype_reserve_io(9)
• memtype_free_io(9)

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and that's the whole page, bestie 💜 this cutie lives in ./arch/x86/mm/pat, dated October 2026, and she answers to the name pat_bp_init(9) — ily, go read the source, mwah 🧚💖✨