STRUCT XE_GUC_ID_MGR(9)

💅 struct xe_guc_id_mgr(9)

okay bestie, welcome to the Kernel API Manual — today's main character is struct xe_guc_id_mgr, aka the GuC context ID Manager ✨ she's small, she's bookkeeping, she's iconic.

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🌸 SYNOPSIS 🌸

here's the whole vibe, literally the entire struct, no cap:

struct xe_guc_id_mgr {
    unsigned long *bitmap;
    unsigned int total;
    unsigned int used;
 };

three fields. that's her. she ate and left no crumbs 🍓

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🎀 Members 🎀

• bitmap — a bitmap (pointer to unsigned long, bestie) that tracks which IDs are allocated 👀 it's giving "attendance sheet but make it bits".
• total — the total number of IDs being managed. the whole roster, fr fr.
• used — the number of IDs currently in use. the ones who actually showed up 💅

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💀 Note 💀

not me reminding you again: the GuC context ID Manager is relying on xe_guc::submission_state.lock to protect its members. so like… take the lock. she does not protect herself. periodt 🔥

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/xe/xe_guc_types.h
• struct xe_guc_db_mgr(9)
• struct xe_guc(9)

go read those next, iykyk 🦋

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okay that's the whole page 🫶 it lives in ./drivers/gpu/drm/xe, it's dated October 2026, and it came to you straight from the Kernel API Manual — mwah, go forth and manage those IDs responsibly 💖🎀✨