xe_pxp_allo...on_resources(9)

💅 xe_pxp_allo...on_resources(9) 💅

okay so this is a page from the Kernel API Manual, section 9, and it's all about one very specific little function. she's giving "very niche, very important" energy and honestly? we stan. let's get into it 🫶

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✨ NAME ✨

xe_pxp_allocate_execution_resources — literally just here to allocate PXP submission objects, that's her whole job, no cap 💅

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🎀 SYNOPSIS 🎀

int xe_pxp_allocate_execution_resources (struct xe_pxp *pxp );

yes bestie that spacing before the closing paren is exactly how it's written, we don't touch it, we respect it 💖

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🦋 ARGUMENTS 🦋

• pxp — the xe_pxp structure. that's it. that's the whole argument list. she's low maintenance ✨

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🌸 DESCRIPTION 🌸

okay so picture this: this function's entire main character moment is allocating exec_queues objects for VCS and GSCCS submission 🔥

and here's the lil twist — the GSCCS submissions are done via PPGTT, so this function has to allocate a VM for it and map the object into that VM. two jobs, one function, iconic behavior 💅

she returns 0 when the allocation and the mapping both go through successfully, and an errno value otherwise 😭 (so like, if it's not zero, something did not slay, go read your errno).

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👑 SEE ALSO 👑

• the kernel file ./drivers/gpu/drm/xe/xe_pxp_submit.c — go read the source, iykyk 📖
• xe_pxp_submit_session_termination(9)
• xe_pxp_submit_session_init(9)
• xe_pxp_submit_session_invalidation(9)

they're all the sibling functions, the whole friend group fr fr 🌈

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okay that's the whole page bestie, no notes 💜 this rewrite was vibing out of ./drivers/gpu/drm/xe and it's dated October 2026 — so like, future-flavored documentation, we love to see it ⭐ 🎀 🧚