__genwqe_writeq(9)

📦 version 7.3.1, in nixpkgs unstable

✨ __genwqe_writeq — NAME ✨

okay bestie, gather round 💖 this is the Kernel API Manual page for __genwqe_writeq, and it does exactly one iconic thing: it writes a 64-bit register. that's it, that's the whole vibe. write 64-bit register. slay 👑

🌸 SYNOPSIS 🌸

int __genwqe_writeq (struct genwqe_dev *cd , u64 byte_offs , u64 val );

like, that's the whole signature. three args, one int back. no cap. ✨

🎀 ARGUMENTS 🎀

  • cd — the genwqe device descriptor 🫶 this is your main character struct, the handle to the device you're out here writing into.
  • byte_offs — the byte offset within BAR 📍 literally just where inside the BAR you're aiming. know your coordinates bestie.
  • val — the 64-bit value 💅 the actual goods. 64 whole bits of it. she's big, she's wide, she's getting written.

⭐ RETURN ⭐

  • 0 — success, we ate, no crumbs 🔥
  • < 0 — error 😭 something went sideways, negative number means it did not go off without a hitch.
ngl, that's the entire return contract: 0 if success; < 0 if error. no in-between, no "well actually", periodt. 💀

🦋 SEE ALSO 🦋

okay so this is the friend group 👯‍♀️ first up, the kernel file this whole thing lives in: ./drivers/misc/genwqe/card_utils.c, and then the whole squad of sibling functions you should also go read, because they're lowkey all connected:

like, twenty-one plus the file itself. she has connections. iykyk 🧚💜

🌈 and that's the page!! mwah 💋 this lil slice of documentation comes to you from ./drivers/misc/genwqe, dated October 2026 — the __genwqe_writeq(9) page, Kernel API Manual, signing off 🎀✨🫶
📦 where this page comes from