xe_reg_whit...ocess_engine(9)

💖 NAME 💖

Okay so bestie, we're in the Kernel API Manual today and the star of the show is xe_reg_whitelist_process_engine — the function whose whole job is to process the table of registers to whitelist ✨

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🌸 SYNOPSIS 🌸

void xe_reg_whitelist_process_engine (struct xe_hw_engine *hwe );

Yup, that's the whole vibe. One argument, no return value, void and proud of it. 💅

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🎀 ARGUMENTS 🎀

• hwe — the engine instance you're processing the whitelist for. That's it, that's the one. Give her the engine and she'll do the rest 🫶

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🦋 DESCRIPTION 🦋

So here's the tea, and it's genuinely cute 🍓

This function processes the wwhitelist table (yes, double-w, we're keeping it, she's iconic) for this platform — meaning whatever platform you happen to be running on, that's the table she's working from, no cap.

And here's the part that ate: it saves in hwe all the registers that need to be whitelisted by the hardware. All of them. Into your engine instance. So that userspace can actually access them 🔥

Think of it like this — hardware is the strictest bouncer ever, and if a register isn't on the list, userspace is not getting in. So this function is the one making the list, checking it twice, and stuffing it into hwe so the hardware knows exactly which registers to let through to userspace. Main character energy honestly 👑

Heads up: she doesn't return anything — void, remember? — the results land in hwe. So keep your eye on that struct, bestie. 👀

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🫶 SEE ALSO 🫶

The whole squad, because nobody runs alone:

• Kernel file ./drivers/gpu/drm/xe/xe_reg_whitelist.c — literally the source, go read her 📖
• xe_reg_whitelist_oa_regs(9)
• xe_reg_dewhitelist_oa_regs(9)
• xe_reg_whitelist_print_entry(9)
• xe_reg_whitelist_dump(9)

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And that's the page, bestie 💜 straight from the ./drivers/gpu/drm/xe source — version vibes October 2026, in the Kernel API Manual 🎀🏆 You understood the assignment, go whitelist those registers, slay 🦋✨