ENUM TTM_CACHING(9)

💖 enum ttm_caching(9) — Kernel API Manual 💖

okay bestie, welcome to the enum ttm_caching(9) page from the Kernel API Manual. this one is short and sweet: it's all about the CPU caching + BUS snooping vibe. no cap, every constant matters here, so let's go ✨

🎀 NAME 🎀

enum ttm_caching — CPU caching and BUS snooping behavior. literally the whole mood.

✨ SYNOPSIS ✨

enum ttm_caching {
    ttm_uncached ,
    ttm_write_combined ,
    ttm_cached

};

🌸 Constants 🌸

• ttm_uncached — the most defensive option for device mappings. it does not even allow write combining. super cautious energy 🛡️
• ttm_write_combined — don't cache read accesses, but it allows at least writes to be combined. reads stay uncached, writes can combine, okayyy 💅
• ttm_cached — fully cached like normal system memory. requires that devices snoop the CPU cache on accesses. full main-character caching, but only if the snooping is there 👑

🦋 SEE ALSO 🦋

Kernel file ./include/drm/ttm/ttm_caching.h — that's the bestie to go read next, periodt.

mwah 💋 this page is from ./include/drm/ttm, dated October 2026, and it's the enum ttm_caching(9) page. bye bestie 🫶