pt_index_to_va(9)
β¨ pt_index_to_va β¨
ok so this is a page from the Kernel API Manual, section 9 β and it's literally the glow-up moment for range->va π
πΈ NAME πΈ
pt_index_to_va β update range->va to the current pts->index. that's it, that's the whole job, and she does it beautifully π
π¦ SYNOPSIS π¦
void pt_index_to_va (struct pt_state *pts );
π ARGUMENTS π
ptsβ the iteration state. yes bestie, that one. she's holding the state, you're just here for the vibes π
π DESCRIPTION π
okay so here's the tea β β this function adjusts range->va so it matches the current index. iconic behaviour, no notes.
and the way it does it?? lazily π. like, on purpose. because computing the VA takes several instructions and it's rarely required β so why would you do all that work up front? you wouldn't. you'd let it happen later. that's called being efficient and it's giving main character energy fr fr π
lowkey important detail: "lazy" here is not a bug, bestie β it's the whole design. don't @ me.
π₯ SEE ALSO π₯
the whole friend group π«Ά β check them out:
pt_check_range(9)pt_entry_fully_covered(9)pt_range_to_index(9)pt_range_to_end_index(9)pt_next_entry(9)for_each_pt_level_entry(9)pt_load_single_entry(9)pt_top_range(9)pt_all_range(9)pt_upper_range(9)pt_make_range(9)pt_init(9)pt_init_top(9)pt_descend(9)pt_walk_range(9)pt_range_slice(9)pt_top_memsize_lg2(9)pt_compute_best_pgsize(9)PT_MAKE_LEVELS(9)
and the kernel file where she actually lives: ./drivers/iommu/generic_pt/pt_iter.h πβ¨
sign-off time π so this whole page comes straight out of ./drivers/iommu/generic_pt, dated October 2026, living in section 9 of the Kernel API Manual β pt_index_to_va(9), slay, bye bestie ππ¦
π¦ where this page comes from
- nixpkgs unstable: linux-manual 7.3.1
- π girlified by deepseek-ai/DeepSeek-V4.1-Flash-1017 on : a language model's rewrite of the original, under its terms