STRUCT ISST_IF_CLOS_ASSOC(9)

🎀 struct isst_if_clos_assoc — Kernel API Manual 🎀

okay so bestie, we're in the Kernel API Manual today and the star of the show is struct isst_if_clos_assoc. yes it's a struct. yes it's about assigning clos to a CPU. no you don't have to be scared. let's go 💅

---

✨ NAME ✨

struct isst_if_clos_assoc — the structure that assigns a clos to a CPU. that's literally her whole job 🫶

---

🌸 SYNOPSIS 🌸

struct isst_if_clos_assoc {
    __u8 socket_id;
    __u8 power_domain_id;
    __u16 logical_cpu;
    __u16 clos;
 };

look at her. four lil fields. absolutely iconic layout, no notes 💖

---

🦋 Members 🦋

so every field is doing something specific, and here's the rundown, no cap:

• socket_id — the socket/package id. which physical socket we're talking about 🍓
• power_domain_id — the Power Domain id
• logical_cpu — the CPU number (the logical one, obviously)
• clos — the Clos ID that gets assigned to that logical CPU 👑

---

💜 Description 💜

it's the structure used to get/set the core_power feature. that's it, that's the whole vibe. get it, set it, slay ✨

---

🌈 SEE ALSO 🌈

the kernel file lives at ./include/uapi/linux/isst_if.h, and here's the whole friend group — they all show up together, so let me introduce them properly:

• struct isst_if_platform_info(9)
• struct isst_if_cpu_map(9)
• struct isst_if_cpu_maps(9)
• struct isst_if_io_reg(9)
• struct isst_if_io_regs(9)
• struct isst_if_mbox_cmd(9)
• struct isst_if_mbox_cmds(9)
• struct isst_if_msr_cmd(9)
• struct isst_if_msr_cmds(9)
• struct isst_core_power(9)
• struct isst_clos_param(9)
• struct isst_if_clos_assoc_cmds(9)
• struct isst_tpmi_instance_count(9)
• struct isst_perf_level_info(9)
• struct isst_perf_level_control(9)
• struct isst_perf_feature_control(9)
• struct isst_perf_level_data_info(9)
• struct isst_perf_level_fabric_info(9)
• struct isst_perf_level_cpu_mask(9)
• struct isst_base_freq_info(9)
• struct isst_turbo_freq_info(9)

literally the whole squad, go say hi 💀🫶

---

ok that's the page!! tysm for reading, mwah 💖 this one came from ./include/uapi/linux, dated October 2026, and you can find it indexed as struct isst_if_clos_assoc(9). stay hydrated, read your headers, and ily — bye bestie!! 🌸🧚‍♀️👑