pt_entry_is_write_dirty(9)

💅 pt_entry_is_write_dirty — the Kernel API Manual page you didn't know you needed

okay so bestie, we're in the Kernel API Manual today and this one's a little function with a big job: pt_entry_is_write_dirty.

✨ NAME ✨

pt_entry_is_write_dirty — true if the entry has been written to. that's it. that's the whole vibe check. 🫶

✨ SYNOPSIS ✨

bool pt_entry_is_write_dirty (const struct pt_state *pts );

✨ ARGUMENTS ✨

• pts — the entry to query 🎀 like, this is the thing you're asking about. the main character of the query, if you will.

✨ DESCRIPTION ✨

okay so what does "write dirty" even mean. ngl it sounds like a stan twitter subtweet but it's actually very literal: it means the HW has written to the OA translated by this entry. hardware did a little scribble. it's dirty now. periodt. 💅

and here's the sneaky part — if the entry is contiguous, then you can't just check one thing and call it a day. you have to return the consolidated "write dirty" for all the items. all of them. fr fr, no skipping. 👑

✨ SEE ALSO ✨

go off, read these too:

• Kernel file ./drivers/iommu/generic_pt/pt_common.h
• pt_attr_from_entry(9), pt_can_have_leaf(9), pt_can_have_table(9), pt_clear_entries(9), pt_entry_make_write_dirty(9), pt_entry_make_write_clean(9), pt_dirty_supported(9), pt_entry_num_contig_lg2(9), pt_entry_oa(9), pt_entry_oa_lg2sz(9), pt_entry_oa_exact(9), pt_full_va_prefix(9), pt_has_system_page_size(9), pt_install_leaf_entry(9), pt_install_table(9), pt_item_oa(9), pt_load_entry_raw(9), pt_max_oa_lg2(9), pt_num_items_lg2(9), pt_pgsz_lg2_to_level(9), pt_possible_sizes(9), pt_table_item_lg2sz(9), pt_table_oa_lg2sz(9), pt_table_pa(9), pt_table_ptr(9), pt_max_sw_bit(9), pt_test_sw_bit_acquire(9), pt_set_sw_bit_release(9), pt_load_entry(9)

🦋 okay that's the whole page, hope it slayed. this lil baddie lives in ./drivers/iommu/generic_pt, it's dated October 2026, and it's serving pt_entry_is_write_dirty(9) energy from the Kernel API Manual. mwah 💖✨🎀