etm4_cfg_load_feature(9)

✨ etm4_cfg_load_feature(9) ✨

okay so bestie, welcome to the Kernel API Manual 💅 this is the page for etm4_cfg_load_feature and honestly? it's giving "small function, big responsibilities." let's get into it 🎀

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🌸 NAME 🌸

etm4_cfg_load_feature — load a feature into a device instance. that's it, that's the whole vibe 🦋

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✨ SYNOPSIS ✨

int etm4_cfg_load_feature (struct coresight_device *csdev , struct
       cscfg_feature_csdev *feat_csdev );

she takes two pointers and returns an int, no cap 💜

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🫶 ARGUMENTS 🫶

• csdev — An ETMv4 CoreSight device. that's your device, your main character 😌
• feat_csdev — The feature to be loaded. the thing going into the device, literally 🎀

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🔥 DESCRIPTION 🔥

so what does she actually do? The function will load a feature instance into the device, checking that the register definitions are valid for the device. yes ma'am, there's a whole vibe check happening on those register definitions before anything else goes down 👑

Parameter and register definitions will be converted into internal structures that are used to set the values in the driver when the feature is enabled for the device. so like, it's a whole glow-up transformation — your definitions go in, internal structures come out, and those structures are what actually set the values later when the feature gets enabled 🦋✨

and then — the feature spinlock pointer is initialised to the same spinlock that the driver uses to protect the internal register values. sharing is caring, and sharing a spinlock is protecting your register values, periodt 💅🔒

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👑 SEE ALSO 👑

• Kernel file ./drivers/hwtracing/coresight/coresight-etm4x-cfg.c — go read the source bestie, iykyk 📖
• etm4_cfg_map_reg_offset(9) — the sibling page, equally iconic 🌟

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ngl this one is short but she's doing real work: validation, conversion to internal structures, and spinlock sharing. don't sleep on her 🙈

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okay that's the whole page!! this came from the ./drivers/hwtracing/coresight corner of the kernel, dated October 2026, and it's been a genuine pleasure, mwah 💋🌸 see you in the next manpage 🫶💖