STRUCT ISST_IF_CPU_MAP(9)

💖 NAME 💖

struct isst_if_cpu_map — the CPU mapping between logical and physical CPU, bestie ✨

🎀 SYNOPSIS 🎀

struct isst_if_cpu_map {
    __u32 logical_cpu;
    __u32 physical_cpu;
 };

🌸 Members 🌸

• logical_cpu — the Linux logical CPU number 🐧 like, the number Linux itself uses to talk about a CPU
• physical_cpu — the PUNIT CPU number 👑 aka the number the PUNIT uses, which is a whole different vibe

🦋 Description 🦋

okay so this struct is literally the translator bestie 🫶 it's used to convert from the Linux logical CPU numbering scheme over to the PUNIT CPU numbering scheme. and no, they are not the same, so do not come for me — the PUNIT CPU number is different than the APIC ID based CPU numbering. highkey important to know 💅

⭐ SEE ALSO ⭐

• the kernel file ./include/uapi/linux/isst_if.h 📁 (that struct lives there, iykyk)
• struct isst_if_platform_info(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(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)

like, that's a whole friend group of structs and they all ate 💀🔥 go read them fr fr

and that's the whole page bestie, no notes 💜 this one came straight out of ./include/uapi/linux and it's dated October 2026 — periodt, see u next time 🎀✨