intel_sseu_c...mask_to_user(9)

💅 intel_sseu_c...mask_to_user(9) — bestie edition 🎀

okay so this page lives in the Kernel API Manual and it's genuinely so useful, like it's giving "quiet little helper function that just works" energy ✨

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✨ NAME ✨

intel_sseu_copy_eumask_to_user — copies the EU mask into a userspace buffer, no cap 🫶

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🌸 SYNOPSIS 🌸

int intel_sseu_copy_eumask_to_user (void __user *to , const struct
       sseu_dev_info *sseu );

like literally that's the whole signature, that's it, that's the vibe 💅

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🦋 ARGUMENTS 🦋

• to — pointer to the userspace buffer you're copying into 🎯
• sseu — the SSEU structure that's holding the EU mask you wanna copy, she's the main character here 👑

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💖 DESCRIPTION 💖

So what she does: copies the EU mask over to a userspace buffer, and the format is exactly the one the query ioctl's topology queries expect — like it's not doing anything weird or cute with the layout, it just matches, periodt ✨

And then? She returns the result of the copy_to_user operation. That's the whole return value. That's her whole job. She ate and left no crumbs 💀

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/i915/gt/intel_sseu.c — go read the source bestie, it's right there 🍓
• intel_sseu_copy_ssmask_to_user(9) — her sister function, same energy, different mask 🧚

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ngl if you're here you're probably already deep in i915 land, so like… good luck and hydrate 💜

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and that's the page!! signing off from ./drivers/gpu/drm/i915/gt 🫶, dated October 2026 🌸, and yes the header still says intel_sseu_c...mask_to_user(9) because some things are iconic and don't change 💅⭐