MAP LAYER(9)

💅 Map layer

okay so bestie, welcome to the Map layer(9) page from the Kernel API Manual ✨ this one is short but iconic, and it's giving "know where your memory access lives" energy.

All access to any memory shared with a device (both sysmem and vram) in the Xe driver should go through this layer (xe_map). No sneaky side quests around it, okay? 💖

This layer is built on top of:

:ref:`driver-api/device-io:Generalizing Access to System and I/O Memory`

and with extra hooks into the Xe driver that allows adding asserts to memory accesses (e.g. for blocking runtime_pm D3Cold on Discrete Graphics). Assert girl summer, literally 🎀

👀 SEE ALSO 👀

• Kernel file ./drivers/gpu/drm/xe/xe_map.h 🦋

that's the whole vibe check, bestie 🫶 this page comes from source/version ./drivers/gpu/drm/xe, dated October 2026, and its footer is literally Map layer(9) — mwah, bye! 💖✨