plpks_signed_update_var(9)

📦 version 7.3.1, in nixpkgs unstable

💖 plpks_signed_update_var(9) 💖

okay bestie, welcome to the Kernel API Manual page for plpks_signed_update_var(9) — manual name folded in right at the top, we're being cute and efficient. ✨

🌸 NAME 🌸

plpks_signed_update_var — update the specified authenticated variable. 💅

✨ SYNOPSIS ✨

int plpks_signed_update_var (struct plpks_var *var , u64 flags );

🫶 ARGUMENTS 🫶

  • var — authenticated variable to be updated. 🎀
  • flags — signed update request operation flags. 🚩

🔥 DESCRIPTION 🔥

so basically, the H_PKS_SIGNED_UPDATE HCALL is the one doing a signed update to an object in the PLPKS. no cap. 💫

The object must have the signed update policy flag set. like, that is not optional, bestie. 🚨

Possible reasons for the returned errno values — because errno loves to be dramatic:

  • -ENXIO — if PLPKS is not supported. 💀
  • -EIO — if PLPKS access is blocked due to the LPAR's state; if PLPKS modification is blocked due to the LPAR's state; if an error occurred while processing the request. 😭
  • -EINVAL — if invalid authorization parameter; if invalid object label parameter; if invalid object label len parameter; if invalid or unsupported policy declaration; if invalid signed update flags; if invalid input data parameter; if invalid input data len parameter; if invalid continue token parameter. 🙈
  • -EPERM — if access is denied. 🚫
  • -ENOMEM — if there is inadequate memory to perform the operation. 🧠💥
  • -EBUSY — if unable to handle the request or long running operation initiated, retry later. ⏳

🌈 RETURN 🌈

On success 0 is returned, a negative errno if not. that's the whole vibe. 👑

🦋 SEE ALSO 🦋

mwah! this page's source/version is ./arch/powerpc/platforms/pseries, dated October 2026. stay slay, kernel bestie. 💖✨

📦 where this page comes from