is_kho_boot(9)

💅 is_kho_boot(9) — Kernel API Manual ✨

okay so bestie, welcome to is_kho_boot(9), aka the Kernel API Manual page that's about to do a tiny little boot vibe check. it's giving “small function, very specific KHO energy,” and honestly? obsessed. 🦋

🌸 NAME 🌸

is_kho_boot — check if current kernel was booted via KHO-enabled kexec. 👑

✨ SYNOPSIS ✨

bool is_kho_boot (void );

🎀 ARGUMENTS 🎀

• void — no arguments. literally none, bestie, not a single one. 💀

🦋 DESCRIPTION 🦋

so the way that this function works is: it checks if the current kernel was loaded through a kexec operation with KHO enabled, by verifying that a valid KHO FDT was passed. that's the whole check. no cap. ✨

💅 NOTE 💅

okay, important vibe check: this function returns reliable results only after kho_populate has been called during early boot. before that, it may return false even if KHO data is present. so if it's acting sus before kho_populate, that's why. 😭

🌈 RETURN 🌈

• true if booted via KHO-enabled kexec
• false otherwise

👑 SEE ALSO 👑

Kernel file: ./kernel/liveupdate/kexec_handover.c

and the full KHO bestie lineup, in all their (9) glory:

• kho_encode_radix_key(9)
• kho_decode_radix_key(9)
• kho_radix_add_key(9)
• kho_radix_del_key(9)
• kho_radix_init_tree(9)
• kho_radix_destroy_tree(9)
• kho_radix_walk_tree(9)
• kho_restore_folio(9)
• kho_restore_pages(9)
• kho_reserve_scratch(9)
• kho_add_subtree(9)
• kho_preserve_folio(9)
• kho_unpreserve_folio(9)
• kho_preserve_pages(9)
• kho_unpreserve_pages(9)
• kho_preserve_vmalloc(9)
• kho_unpreserve_vmalloc(9)
• kho_restore_vmalloc(9)
• kho_alloc_preserve(9)
• kho_unpreserve_free(9)
• kho_restore_free(9)
• kho_retrieve_subtree(9)

mwah 💋 — source/version: ./kernel/liveupdate, date: October 2026, and the page: is_kho_boot(9). periodt. 🎀🫶