cci_disable_port_by_cpu(9)

💅 cci_disable_port_by_cpu(9) — Kernel API Manual

Okay bestie, welcome to the Kernel API Manual page for cci_disable_port_by_cpu(9) ✨ This one is literally about disabling a CCI port by CPU reference, and yes, the details matter fr fr.

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🌸 NAME

cci_disable_port_by_cpu — function to disable a CCI port by CPU reference 🎀

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🦋 SYNOPSIS

int notrace cci_disable_port_by_cpu (u64 mpidr );

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✨ ARGUMENTS

• mpidr — the mpidr of the CPU whose CCI port should be disabled 👑

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💜 DESCRIPTION

Disabling a CCI port for a CPU implies disabling the CCI port controlling that CPU cluster. The way that works is very much “whole cluster energy,” not just one little port doing its own thing 💅

Code disabling CPU CCI ports must make sure that the CPU running the code is the last active CPU in the cluster — ie all other CPUs are quiescent in a low power state. This is important, bestie. Do not skip the vibe check on this one 😭

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🫶 RETURN

• 0 on success ✅
• -ENODEV on port look-up failure 💀

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🌈 SEE ALSO

• Kernel file ./drivers/bus/arm-cci.c
• __cci_ace_get_port(9)
• cci_port_control(9)
• cci_enable_port_for_self(9)
• __cci_control_port_by_device(9)
• __cci_control_port_by_index(9)

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Signed with love from ./drivers/bus, dated October 2026, on the cci_disable_port_by_cpu(9) page — periodt 💖🌟