cppc_get_highest_perf(9)

✨ cppc_get_highest_perf — a Kernel API Manual moment ✨

okay so bestie, welcome to the Kernel API Manual entry for cppc_get_highest_perf(9) and honestly? she's a little icon. tiny function, big main character energy 💅

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🌸 NAME 🌸

cppc_get_highest_perf — get the highest performance register value 💖 (yes, that's literally her whole job and she does it flawlessly, no cap)

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🦋 SYNOPSIS 🦋

int cppc_get_highest_perf (int cpunum , u64 *highest_perf );

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🎀 ARGUMENTS 🎀

• cpunum — the CPU you're pulling the highest performance from 👑 like, which one bestie, be specific
• highest_perf — the return address 🫶 this is where the answer gets dropped off, so pls make sure it's a real place

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⭐ RETURN ⭐

• 0 — success slay ✨ everything went off without a hitch
• -EIO — otherwise 😭 like if it's not 0, it's this, and that's the whole story

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💜 SEE ALSO 💜

the whole friend group, fr fr — kernel file ./drivers/acpi/cppc_acpi.c plus:

acpi_get_psd_map(9), cpc_ffh_supported(9), cpc_supported_by_cpu(9), pcc_data_alloc(9), acpi_cppc_processor_probe(9), acpi_cppc_processor_exit(9), cpc_read_ffh(9), cpc_read_ffh_fb_ctrs(9), cpc_write_ffh(9), cppc_get_desired_perf(9), cppc_get_nominal_perf(9), cppc_get_epp_perf(9), cppc_get_perf_caps(9), cppc_perf_ctrs_in_pcc_cpu(9), cppc_perf_ctrs_in_pcc(9), cppc_get_perf_ctrs(9), cppc_set_epp(9), cppc_get_auto_act_window(9), cppc_set_auto_act_window(9), cppc_get_auto_sel(9), cppc_set_auto_sel(9), cppc_set_enable(9), cppc_get_perf(9), cppc_set_perf(9), cppc_get_perf_limited(9), cppc_set_perf_limited(9), cppc_get_transition_latency(9)

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💀 quick vibe check: that's a lot of siblings and every single one of them is invited to the function call. don't skip any, iykyk 🙈

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🌈 and that's the page!! brought to you by the fine folks in ./drivers/acpi, dated October 2026 — go forth and read those registers bestie, ily, bye!! 🎀💖✨