idte_crste(9)

🌸 idte_crste(9) 🌸

okay so this is from the Kernel API Manual, bestie, and it's a little function called idte_crste that lives in ./arch/s390/kvm/gmap. sit down, we're learning s390 today 💅

✨ NAME ✨

idte_crste — invalidate a crste entry using idte 🫶

✨ SYNOPSIS ✨

void idte_crste (union crste *crstep , gfn_t gfn , unsigned long opt ,
union asce asce , int local );

✨ ARGUMENTS ✨

• crstep — a pointer to the crste that's getting invalidated, like, the crste in question 🎯
• gfn — a gfn mapped by the crste, no cap
• opt — the options for the idte instruction (yes, idte is its own whole thing, we don't make the rules)
• asce — the asce. that's it. that's the whole description 😭
• local — whether the operation is cpu-local or not 🖥️

✨ SEE ALSO ✨

• the kernel file ./arch/s390/kvm/gmap/dat.h
• _pte(9)
• struct vsie_rmap(9)
• crste_origin_large(9)

go read those next, iykyk 📚

and that's the whole page, bestie 🌈 this one's from ./arch/s390/kvm/gmap, dated October 2026, and it's idte_crste(9) through and through — mwah, slay, periodt 💋🎀