vgic_v3_rdist_free_slot(9)

💖 vgic_v3_rdist_free_slot(9) 💖

okay so this is from the Kernel API Manual, and it's giving very specific kernel-internals realness 💅 we're looking up registered rdist regions and finding one with room for a new rdist region. no cap.

🌸 NAME 🌸

vgic_v3_rdist_free_slot — look up registered rdist regions and identify one which has free space to put a new rdist region. that's the whole assignment, bestie 🫶

✨ SYNOPSIS ✨

struct vgic_redist_region * vgic_v3_rdist_free_slot (struct list_head
       *rd_regions );

🎀 ARGUMENTS 🎀

• rd_regions — the redistributor region list head, bestie 🦋

🦋 DESCRIPTION 🦋

okay so picture a redistributor region mapping n redistributors, where n = region size / (2 x 64kB). The stride between redistributors is 0, and the regions are filled in the index order. that's the tea ☕✨

👑 RETURN 👑

it returns the redist region handle, if any, that has space to map a new rdist region. the if any is doing a lot of work there 🙈

🌈 SEE ALSO 🌈

• Kernel file ./arch/arm64/kvm/vgic/vgic-v3.c — go peek at vgic_v3_rdist_overlap(9) and vgic_v3_probe(9) 💖

mwah 💋 — that's the whole page from ./arch/arm64/kvm/vgic, dated October 2026, bestie. now go slay those rdist regions 🫶👑