iopt_pages_rw_access(9)

💅 iopt_pages_rw_access(9) — Kernel API Manual 🎀

okay so bestie, this is iopt_pages_rw_access(9) from the Kernel API Manual, and it's literally giving “copy to/from a linear slice of the pages” energy. let's get into it ✨

🌸 NAME 🌸

iopt_pages_rw_access — Copy to/from a linear slice of the pages

✨ SYNOPSIS ✨

int iopt_pages_rw_access (struct iopt_pages *pages , unsigned long
start_byte , void *data , unsigned long length , unsigned int flags );

🎀 ARGUMENTS 🎀

• pages — pages to act on. the main characters, fr 🫶
• start_byte — First byte of pages to copy to/from. like where the slay begins ✨
• data — Kernel buffer to get/put the data. the little vessel for your bytes 🎀
• length — Number of bytes to copy. exactly how much we're moving, no cap 💅
• flags — IOMMUFD_ACCESS_RW_* flags. the flag set, iykyk 👑

🦋 DESCRIPTION 🦋

okay so here's the vibe: this will find each page in the range, kmap it and then memcpy to/from the given kernel buffer. that's the whole little routine, and it ate. 💅

👑 SEE ALSO 👑

Kernel file ./drivers/iommu/iommufd/pages.c — go read it, bestie 🫶

• iopt_area_unmap_domain(9)
• iopt_area_unfill_domain(9)
• iopt_area_fill_domain(9)
• iopt_area_fill_domains(9)
• iopt_area_unfill_domains(9)
• iopt_pages_unfill_xarray(9)
• iopt_pages_fill_from_xarray(9)
• iopt_pages_fill_xarray(9)
• iopt_area_add_access(9)
• iopt_area_remove_access(9)

mwah 💖 source/version ./drivers/iommu/iommufd, date October 2026, page iopt_pages_rw_access(9) — periodt. 🫶