idxd_copy_cr(9)

📦 version 7.3.1, in nixpkgs unstable

okay so this is idxd_copy_cr(9), straight outta the Kernel API Manual, and we're gonna break it down without losing a single crumb. bestie, it's giving kernel-internals realness. 🎀

✨ NAME ✨

idxd_copy_cr — copy completion record to user address space found by wq and PASID 💖

🦋 SYNOPSIS 🦋

int idxd_copy_cr (struct idxd_wq *wq , ioasid_t pasid , unsigned long
addr , void *cr , int len );

🌸 ARGUMENTS 🌸

  • wq — the work queue. iconic little context object. 💅
  • pasid — the PASID. yes, exactly that. no cap.
  • addr — user fault address to write. this is the address getting the write treatment. ✨
  • cr — the completion record. the star of the show, lowkey. 👑
  • len — number of bytes to copy. the size girlie. 🌈

💜 DESCRIPTION 💜

okay so here's the tea: this is called by a work that handles a completion record fault. that's the moment this function enters the group chat. it's literally that vibe — completion record fault handling energy. 🫶

🔥 RETURN 🔥

returns number of bytes copied. that's the number, bestie. periodt. 💖

🧚 SEE ALSO 🧚

Kernel file ./drivers/dma/idxd/cdev.c — go peek if you want the lore. iykyk. ⭐

catch you later, bestie — this page comes from ./drivers/dma/idxd, dated October 2026, and it ate. 💅🎀

📦 where this page comes from