XE_REG_ADDR_MAX(9)

💖 XE_REG_ADDR_MAX(9) — your MMIO address ceiling, bestie 💖

okay so this is the XE_REG_ADDR_MAX(9) page from the Kernel API Manual, and honestly? It’s a short one but it’s important. No cap.

🌸 NAME 🌸

XE_REG_ADDR_MAX — the upper limit on MMIO register address. That’s the whole vibe.

✨ SYNOPSIS ✨

XE_REG_ADDR_MAX

🦋 DESCRIPTION 🦋

This macro is the upper limit — and no, bestie, it’s not inclusive — on the MMIO register offset supported by struct xe_reg and functions based on struct xe_mmio. Read that again: not inclusive. The way it sets the boundary is very main character energy.

Currently this is defined as 4 MiB. Periodt. 💅

🎀 SEE ALSO 🎀

• Kernel file ./drivers/gpu/drm/xe/regs/xe_reg_defs.h
• struct xe_reg(9)
• struct xe_reg_mcr(9)
• XE_REG_OPTION_MASKED(9)
• XE_REG_OPTION_VF(9)
• XE_REG_INITIALIZER(9)
• XE_REG(9)
• XE_REG_MCR(9)

okay bestie, that’s the page! source/version: ./drivers/gpu/drm/xe/regs · date: October 2026 💖✨