STRUCT HL_CLK_THROTTLE(9)

okay so bestie, welcome to the struct hl_clk_throttle(9) page from the Kernel API Manual — this one is lowkey all about keeping track of clock throttling timestamps, and we're gonna get into every lil' detail. 💅✨

🌸 NAME 🌸

struct hl_clk_throttle — keeps current/last clock throttling timestamps. periodt. 🫶

✨ SYNOPSIS ✨

here's the exact shape of it, no cap:

struct hl_clk_throttle {
    struct hl_clk_throttle_timestamp
timestamp[HL_CLK_THROTTLE_TYPE_MAX];
    struct mutex    lock;
    u32 current_reason;
    u32 aggregated_reason;
 };

🫶 Members 🫶

• timestamp — timestamp taken by driver and firmware. index 0 refers to POWER, index 1 refers to THERMAL 🌡️⚡
• lock — protects this structure as it can be accessed from both event queue context and info_ioctl context 🔒
• current_reason — bitmask represents the current clk throttling reasons 🎀
• aggregated_reason — bitmask represents aggregated clk throttling reasons since driver load 📚

👑 SEE ALSO 👑

Kernel file ./drivers/accel/habanalabs/common/habanalabs.h — and here's the whole squad, iykyk:

• enum hl_mmu_page_table_location(9), struct iterate_module_ctx(9), struct hl_gen_wait_properties(9), struct pgt_info(9), enum hl_pci_match_mode(9), enum hl_fw_component(9), enum hl_fw_types(9), enum hl_queue_type(9), struct hw_queue_properties(9), enum vm_type(9), enum mmu_op_flags(9), enum hl_device_hw_state(9), struct hl_mmu_properties(9), struct hl_hints_range(9), struct asic_fixed_properties(9), struct hl_fence(9), struct hl_cs_compl(9), struct hl_ts_buff(9), struct hl_mem_mgr(9), struct hl_mem_mgr_fini_stats(9)
• struct hl_mmap_mem_buf_behavior(9), struct hl_mmap_mem_buf(9), struct hl_cb(9), struct hl_sync_stream_properties(9), struct hl_encaps_signals_mgr(9), struct hl_hw_queue(9), struct hl_cq(9), struct hl_ts_free_jobs(9), struct hl_user_interrupt(9), struct timestamp_reg_free_node(9), struct hl_user_pending_interrupt(9), struct hl_eq(9), struct hl_dec(9), enum hl_asic_type(9), enum hl_pm_mng_profile(9), enum hl_pll_frequency(9), struct pci_mem_region(9), struct static_fw_load_mgr(9), struct fw_response(9), struct dynamic_fw_load_mgr(9)
• struct pre_fw_load_props(9), struct fw_image_props(9), struct fw_load_mgr(9), struct engines_data(9), struct hl_asic_funcs(9), enum hl_va_range_type(9), struct hl_va_range(9), struct hl_cs_counters_atomic(9), struct hl_dmabuf_priv(9), struct hl_cs_outcome(9), struct hl_cs_outcome_store(9), struct hl_ctx(9), struct hl_ctx_mgr(9), struct hl_userptr(9), struct hl_cs(9), struct hl_cs_job(9), struct hl_cs_parser(9), struct hl_vm_hash_node(9), struct hl_vm_hw_block_list_node(9), struct hl_vm_phys_pg_pack(9)
• struct hl_vm_va_block(9), struct hl_vm(9), struct hl_debug_params(9), struct hl_notifier_event(9), struct hl_fpriv(9), struct hl_info_list(9), struct hl_debugfs_entry(9), struct hl_dbg_device_entry(9), struct hl_debugfs_cfg_access_entry(9), struct hl_debugfs_cfg_access(9), struct hl_hw_obj_name_entry(9), struct hl_mon_state_dump(9), struct hl_sync_to_engine_map_entry(9), struct hl_sync_to_engine_map(9), struct hl_state_dump_specs_funcs(9), struct hl_state_dump_specs(9), struct hl_device_reset_work(9), struct hl_mmu_priv(9), struct hl_mmu_per_hop_info(9), struct hl_mmu_hop_info(9)
• struct hl_hr_mmu_funcs(9), struct hl_mmu_funcs(9), struct hl_prefetch_work(9), struct multi_cs_completion(9), struct multi_cs_data(9), struct hl_clk_throttle_timestamp(9), struct user_mapped_block(9), struct cs_timeout_info(9), struct undefined_opcode_info(9), struct page_fault_info(9), struct razwi_info(9), struct hw_err_info(9), struct fw_err_info(9), struct engine_err_info(9), struct hl_error_info(9), struct hl_reset_info(9), struct eq_heartbeat_debug_info(9), struct hl_device(9), struct hl_cs_encaps_sig_handle(9), struct hl_info_fw_err_info(9)
• hl_ioctl_t(9), struct hl_ioctl_desc(9), hl_get_sg_info(9), hl_mem_area_inside_range(9), hl_mem_area_crosses_range(9)

mwah 💋 — this lil' page lives in ./drivers/accel/habanalabs/common, and it's dated October 2026. it's the struct hl_clk_throttle(9) page from the Kernel API Manual, and that's the whole vibe. 🫶🎀