find_acpi_cp...logy_package(9)

okay bestie, this is the find_acpi_cpu_topology_package page from the Kernel API Manual, and it’s literally here to help you figure out a CPU’s package vibe 💅✨

💖 NAME 💖

find_acpi_cpu_topology_package — determine a unique CPU package value 🎀

✨ SYNOPSIS ✨

int find_acpi_cpu_topology_package (unsigned int cpu );

🌸 ARGUMENTS 🌸

• cpu — the kernel logical CPU number, bestie 🧚

🦋 DESCRIPTION 🦋

So the goal here is to determine a topology unique package ID for the given CPU. That ID can then be used to group peers, and those peers will have matching ids 👑✨

The search stops when either a level is found with the PHYSICAL_PACKAGE flag set, or we reach a root node. periodt 🫶

🔥 RETURN 🔥

It returns -ENOENT if the PPTT doesn’t exist, or if the CPU cannot be found 😭

Otherwise, it returns a value which represents the package for this CPU. slay 💜

🌈 SEE ALSO 🌈

Kernel file: ./drivers/acpi/pptt.c 📁

• acpi_pptt_walk_cache(9)
• acpi_count_levels(9)
• acpi_pptt_leaf_node(9)
• acpi_find_processor_node(9)
• update_cache_properties(9)
• topology_get_acpi_cpu_tag(9)
• check_acpi_cpu_flag(9)
• acpi_get_cache_info(9)
• cache_setup_acpi(9)
• acpi_pptt_cpu_is_thread(9)
• find_acpi_cpu_topology(9)
• find_acpi_cpu_topology_cluster(9)
• find_acpi_cpu_topology_hetero_id(9)
• acpi_pptt_get_child_cpus(9)
• acpi_pptt_get_cpus_from_container(9)
• find_acpi_cache_level_from_id(9)
• acpi_pptt_get_cpumask_from_cache_id(9)

source/version: ./drivers/acpi · date: October 2026 — iconic little footer moment, no cap 💖🎀💫