ENUM GMAP_FLAGS(9)

✨ enum gmap_flags — flags of a gmap ✨

okay so this is from the Kernel API Manual, bestie — like the official docs, but make it make sense 💅

🌸 NAME 🌸

enum gmap_flags — the flags of a gmap. literally just the vibe-check bitfield for a gmap, no cap 🎀

🦋 SYNOPSIS 🦋

enum gmap_flags {
    GMAP_FLAG_SHADOW ,
    GMAP_FLAG_OWNS_PAGETABLES ,
    GMAP_FLAG_IS_UCONTROL ,
    GMAP_FLAG_ALLOW_HPAGE_1M ,
    GMAP_FLAG_ALLOW_HPAGE_2G ,
    GMAP_FLAG_PFAULT_ENABLED ,
    GMAP_FLAG_USES_SKEYS ,
    GMAP_FLAG_USES_CMM ,
    GMAP_FLAG_EXPORT_ON_UNMAP

};

like, that's the whole enum, nine constants, all capitalised, all iconic 👑

💖 Constants 💖

• GMAP_FLAG_SHADOW — this gmap is a vsie shadow gmap. yes babes, it's giving shadow 🌈
• GMAP_FLAG_OWNS_PAGETABLES — the gmap owns, like, all the dat levels 💅 normally this is 1. it's 0 only for ucontrol per-cpu gmaps, because those share their page tables with the main gmap — roomies, basically 🫶
• GMAP_FLAG_IS_UCONTROL — the gmap is ucontrol (so, the main gmap or a per-cpu gmap) ✨
• GMAP_FLAG_ALLOW_HPAGE_1M — 1M hugepages are allowed for this gmap, and that's independently of the page size userspace is using. it's giving main character energy, not follower energy 😌
• GMAP_FLAG_ALLOW_HPAGE_2G — same deal but 2G: 2G hugepages are allowed for this gmap, independently of the page size used by userspace. big pages, big slay 🔥
• GMAP_FLAG_PFAULT_ENABLED — pfault is enabled for the gmap ⭐
• GMAP_FLAG_USES_SKEYS — set if the guest uses storage keys 🔑
• GMAP_FLAG_USES_CMM — whether the guest uses CMMA 🧚
• GMAP_FLAG_EXPORT_ON_UNMAP — whether to export guest pages when unmapping. like packing your bags on the way out 🎀

👑 SEE ALSO 👑

Kernel file ./arch/s390/kvm/gmap/gmap.h pte_needs_unshadow(9), crste_needs_unshadow(9), gmap_is_shadow_valid(9) — go read these next, iykyk 📚💜

ngl bestie, the whole thing lives over in ./arch/s390/kvm/gmap — that's the source, and the version's stamped October 2026. periodt. 💀🫶💖