STRUCT XE_PT_WALK_OPS(9)

💅 struct xe_pt_walk_ops — Walk callbacks

okay so bestie, this is a page from the Kernel API Manual and it's about struct xe_pt_walk_ops, which is literally just a little bundle of walk callbacks. that's the whole vibe. 🦋

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✨ NAME ✨

struct xe_pt_walk_ops — Walk callbacks. that's it, that's the name, no notes 💅

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🌸 SYNOPSIS 🌸

struct xe_pt_walk_ops {
    xe_pt_entry_fn pt_entry;
    xe_pt_entry_fn pt_post_descend;
 };

two little function-pointer girlies, both typed xe_pt_entry_fn, both ready to get called during a page table walk. we stan a minimal struct. 🎀

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🫶 Members 🫶

• pt_entry — Callback to be called for each page table entry prior to descending to the next level. and the returned value of the action function parameter? that one is honored. like, respected, listened to, taken seriously. ma'am's return value actually matters here 👑
• pt_post_descend — Callback to be called for each page table entry after return from descending to the next level. and its returned value from the action function parameter? ignored. literally not even read. it's giving "you can say whatever you want, nobody's checking" 😭💀

fr fr, clock the difference: pt_entry runs before you go down a level and its return value counts; pt_post_descend runs after you come back up and its return value is straight-up ignored. do not mix these up bestie, i'm begging 🙈

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🔥 SEE ALSO 🔥

Kernel file ./drivers/gpu/drm/xe/xe_pt_walk.h — go read the source, it's iconic:

• struct xe_ptw(9)
• struct xe_pt_walk(9)
• xe_pt_entry_fn(9)
• xe_pt_covers(9)
• xe_pt_num_entries(9)
• xe_pt_offset(9)

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and that's the page, bestie!! 🌈 this one lives in ./drivers/gpu/drm/xe, and the version/date energy on it is October 2026, so yeah, it's giving future but make it kernel docs. slay, periodt, go read xe_pt_walk.h 💖✨