cpc_read_ffh_fb_ctrs(9)

💅 cpc_read_ffh_fb_ctrs — NAME ✨

okay so bestie, welcome to the Kernel API Manual 🎀 and lemme introduce you to cpc_read_ffh_fb_ctrs — she reads FFH feedback counters together. that's it, that's the whole vibe. two counters, one call, no cap 🫶

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🌸 SYNOPSIS 🌸

int cpc_read_ffh_fb_ctrs (int cpunum , struct cpc_reg *reg1 , u64 *val1
, struct cpc_reg *reg2 , u64 *val2 );

literally just hand her a CPU and two registers and she'll hand you back two values. iconic behavior honestly 💅

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✨ ARGUMENTS ✨

• cpunum — Target CPU 🎯 like, which CPU bestie. that's the one.
• reg1 — the first CPPC register information 🍓 (yes, "information" — she's first, she gets the whole info package)
• val1 — place holder for the first return value 🎀 this is where result numero uno goes to live
• reg2 — the second CPPC register information 🦋 same deal, but she's second
• val2 — place holder for the second return value 💖 and this is where result numero dos lands

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👑 RETURN 👑

• 0 — slay, success ✨
• error code otherwise — not slay, something went sideways 😭 it's giving error, but at least she tells you

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🔥 SEE ALSO 🔥

kernel file ./drivers/acpi/cppc_acpi.c — and honestly the whole friend group showed up for this one, so let me introduce everybody 💜:

• 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_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)

ngl that's a lot of siblings but they're all valid, i don't make the rules 💀

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and that's the page bestie 🧚 this little beauty lives in ./drivers/acpi, and she was dated October 2026 — so mark your calendar, mwah 💋⭐