STRUCT XE_REG_MCR(9)

💅 struct xe_reg_mcr(9) 💅

ok so bestie, welcome to the Kernel API Manual — this is the page for struct xe_reg_mcr, and honestly it's a short one but it matters, so pay attention 🫶

---

✨ NAME ✨

struct xe_reg_mcr — literally the MCR register definition, that's it, that's the whole vibe 💖

---

🌸 SYNOPSIS 🌸

struct xe_reg_mcr {
    struct xe_reg __reg;
 };

---

🎀 Members 🎀

• __reg — the register itself. that's the member. that's the whole member. iconic minimalism 💅

---

🦋 Description 🦋

okay so here's the tea, and it's actually important 👑

An MCR register is the same as a regular register — no cap, same thing, same concept. BUT it uses another type, because the internal API used for accessing them is different. and bestie, listen to this next part:

it's never correct to use regular MMIO access. never ever. not once. don't do it 😭

so the type exists purely to keep you honest — the compiler and the API can tell the difference, and you should respect the distinction fr fr 🧚

---

🔥 SEE ALSO 🔥

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

go read those too, they're the friend group 💜

---

⭐ that's the page!! sign-off time: this lil beauty lives over in ./drivers/gpu/drm/xe/regs and it's dated October 2026 — anyway ily, go forth and never use regular MMIO access on an MCR register 💖✨🎀