cpc_ffh_supported(9)

💅 cpc_ffh_supported(9) — Kernel API Manual energy

okay so bestie, welcome to the cpc_ffh_supported(9) page ✨ this one lives in the Kernel API Manual and it's genuinely so simple it's giving "one-line baddie" — but like, important one-line baddie, yk? 🎀

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🌸 NAME 🌸

cpc_ffh_supported — literally just checking if FFH reading is supported, that's it, that's the whole vibe check 💖

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🦋 SYNOPSIS 🦋

bool cpc_ffh_supported (void );

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✨ ARGUMENTS ✨

• void — no arguments, nada, zero, empty set 🫶 she takes nothing and she gives you a bool, main character energy fr

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💜 DESCRIPTION 💜

So what she actually does: she checks whether the architecture has support for functional fixed hardware read/write capability 👑 that's the whole thing. No side quests, no hidden params, no surprises. She goes and asks the architecture "hey do you support FFH read/write", and comes back with an answer 😌

it's giving very much "are we doing this or not" energy and honestly? iconic 💅

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🔥 RETURN 🔥

• true — supported 🎉 slay, go read your FFH
• false — not supported 😭 no FFH for you, bestie

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🌈 SEE ALSO 🌈

So there's a whole girlie-pop group of related calls and they all hang out in the kernel file ./drivers/acpi/cppc_acpi.c — go say hi to the whole squad 🧚💫

• acpi_get_psd_map(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_highest_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 reminder bestie: this page is filed under ./drivers/acpi and it's dated October 2026 🌸 so if you're reading this from the future, hi, love you, hope FFH is supported 💖

and that's the page!! short, sweet, and to the point — no cap, sometimes the smallest manpage is the most chill one 🎀✨💅🦋🫶