STRUCT XE_HWMON(9)

💖 STRUCT XE_HWMON(9) 💖

okay bestie, so this is struct xe_hwmon — the xe hwmon data structure, straight out of the Kernel API Manual (section 9, yes ma'am 🎀). it's the lil' bookkeeping queen that holds all the hardware-monitoring tea for your xe device. let's get into it 💅

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✨ NAME ✨

struct xe_hwmon — the xe hwmon data structure. that's her. that's the whole vibe. 🦋

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✨ SYNOPSIS ✨

here's the actual glow-up, copy it exactly bestie, don't get creative:

struct xe_hwmon {
    struct device *hwmon_dev;
    struct xe_device *xe;
    struct mutex hwmon_lock;
    int scl_shift_power;
    int scl_shift_energy;
    int scl_shift_time;
    struct xe_hwmon_energy_info ei[CHANNEL_MAX];
    struct xe_hwmon_fan_info fi[FAN_MAX];
    bool boot_power_limit_read;
    u32 pl1_on_boot[CHANNEL_MAX];
    u32 pl2_on_boot[CHANNEL_MAX];
    struct xe_hwmon_thermal_info temp;
};

like, look at her. struct definition icon behavior honestly 👑

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✨ Members ✨

okay now the main event, one by one, no skipping, i promised 🫶

• hwmon_dev — the hwmon device for xe. this is the device handle, the main character of the hwmon situation 💅
• xe — the Xe device. the actual GPU she's monitoring, iykyk 🔥
• hwmon_lock — lock for rw attributes. it's a struct mutex, and it's there so read/write attributes don't body-slam each other. respect the lock bestie, fr fr 🔒
• scl_shift_power — pkg power unit. that's the package power unit scaling shift, an int ✨
• scl_shift_energy — pkg energy unit. same deal, but for package energy 🌸
• scl_shift_time — pkg time unit. and this one's for package time ⭐
• ei — energy info for energyN_input. it's an array: struct xe_hwmon_energy_info ei[CHANNEL_MAX]; so there's one per channel 💖
• fi — fan info for fanN_input. array time again: struct xe_hwmon_fan_info fi[FAN_MAX]; 🌀
• boot_power_limit_read — is boot power limits read. a bool, so it's literally just "did we read the boot power limits or not" 🙈
• pl1_on_boot — power limit PL1 on boot. u32 pl1_on_boot[CHANNEL_MAX]; — per-channel PL1 value captured at boot 👑
• pl2_on_boot — power limit PL2 on boot. u32 pl2_on_boot[CHANNEL_MAX]; — same but PL2, she's the bigger sister 🔥
• temp — Temperature info. a struct xe_hwmon_thermal_info, keeping an eye on the heat 🌡️

ngl bestie, if you're poking at these fields from outside the driver, you're in "know what you're doing" territory. the lock is there for a reason, don't just raw-dog the rw attributes 💀

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✨ SEE ALSO ✨

go read the source, it's giving main character energy:

• Kernel file ./drivers/gpu/drm/xe/xe_hwmon.c struct
• struct xe_hwmon_energy_info(9)
• struct xe_hwmon_fan_info(9)
• struct xe_hwmon_thermal_info(9)

those last three are the structs nested inside this one, so like, go say hi to them too 🫶

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and that's the page!! 💜 this one lives in ./drivers/gpu/drm/xe, it's dated October 2026, and it's struct xe_hwmon(9) from the Kernel API Manual — mwah, love that for us 🎀✨🌸