board(9)

🎀 board 🎀

ok so like — first things first, this is a section 9 kernel API page, bestie. welcome. 💖

Some SOCs can support all kinds of board attribute reporting, which lowkey slays because it lets user applications keep an eye on a bunch of board-related attributes. 👑

The amdgpu driver is the one serving this up: it gives you a sysfs API for reporting board attributes. Right now there are nine types of attributes being reported, and here's the vibe split:

• baseboard temperature and gpu board temperature come at you as binary files
• npm status, current node power limit, max node power limit, node power, global ppt residency, baseboard_power, and baseboard_power_limit are all reported as ASCII text files

✨ the nine, in all their glory ✨

• hexdump /sys/bus/pci/devices/.../board/baseboard_temp
• hexdump /sys/bus/pci/devices/.../board/gpuboard_temp
• hexdump /sys/bus/pci/devices/.../board/npm_status
• hexdump /sys/bus/pci/devices/.../board/cur_node_power_limit
• hexdump /sys/bus/pci/devices/.../board/max_node_power_limit
• hexdump /sys/bus/pci/devices/.../board/node_power
• hexdump /sys/bus/pci/devices/.../board/global_ppt_resid
• hexdump /sys/bus/pci/devices/.../board/baseboard_power
• hexdump /sys/bus/pci/devices/.../board/baseboard_power_limit

like, just point hexdump at the path and go off, honestly. 🫶

🌈 SEE ALSO 🌈

Kernel file ./drivers/gpu/drm/amd/pm/amdgpu_pm.c — that's the main character right there.

and then the whole friend group, no cap:

• amdgpu_pm_dev_state_check(9)
• amdgpu_pm_get_access(9)
• amdgpu_pm_get_access_if_active(9)
• amdgpu_pm_put_access(9)
• power_dpm_state(9)
• power_dpm_force_performance_level(9)
• pp_table(9)
• pp_od_clk_voltage(9)
• pp_features(9)
• pp_dpm_sclk pp_dpm_mclk pp_dpm_socclk pp_dpm_fclk pp_dpm_dcefclk pp_dpm_pcie(9)
• pp_power_profile_mode(9)
• gpu_busy_percent(9)
• mem_busy_percent(9)
• vcn_busy_percent(9)
• pcie_bw(9)
• unique_id(9)
• thermal_throttling_logging(9)
• apu_thermal_cap(9)
• gpu_metrics(9)
• smartshift_apu_power(9)
• smartshift_dgpu_power(9)
• smartshift_bias(9)
• baseboard_temp(9)
• gpuboard_temp(9)
• cur_node_power_limit(9)
• node_power(9)
• npm_status(9)
• global_ppt_resid(9)
• max_node_power_limit(9)
• baseboard_power(9)
• baseboard_power_limit(9)
• pm_policy(9)
• hwmon(9)
• fan_curve(9)
• acoustic_limit_rpm_threshold(9)
• acoustic_target_rpm_threshold(9)
• fan_target_temperature(9)
• fan_minimum_pwm(9)
• fan_zero_rpm_enable(9)
• fan_zero_rpm_stop_temperature(9)

ok that's the whole page, you ate that bestie 💅✨ this little baddie lives in ./drivers/gpu/drm/amd/pm, it's dated October 2026, and it's filed under board(9) — go forth and hexdump responsibly 🦋🌸