qcom_scm_prepare_ice_key(9)

💅 qcom_scm_prepare_ice_key(9) 💅

okay bestie, welcome to the Kernel API Manual page for qcom_scm_prepare_ice_key(9). This baddie is all about re-wrapping a key with the per-boot ephemeral key, and honestly? iconic. Let's get into the lore. ✨

🌸 NAME 🌸

qcom_scm_prepare_ice_key — Re-wrap a key with the per-boot ephemeral key.

✨ SYNOPSIS ✨

int qcom_scm_prepare_ice_key (const u8 *lt_key , size_t lt_key_size , u8
       *eph_key , size_t eph_key_size );

🎀 ARGUMENTS 🎀

• lt_key — a long-term wrapped key. That's the key coming in, bestie. 🔑
• lt_key_size — size of lt_key in bytes. Count 'em exactly.
• eph_key — output buffer for the ephemerally-wrapped key. This is where the re-wrapped result lands. 💖
• eph_key_size — size of eph_key in bytes. Must be the exact wrapped key size used by the SoC. No vibes-based sizing, no rounding, literally the exact wrapped key size used by the SoC. 💀

🌈 DESCRIPTION 🌈

Given a long-term wrapped key, re-wrap it with the per-boot ephemeral key for added protection. The resulting key will only be valid for the current boot. So it's giving one-boot-only exclusivity — cute for security, tragic for reusing that key later. 😭👑

🔥 RETURN 🔥

0 on success; -errno on failure. That's the whole mood. Slay. 💅

🦋 SEE ALSO 🦋

go touch grass in these, bestie:

• Kernel file ./drivers/firmware/qcom/qcom_scm.c
• struct qcom_scm_qseecom_resp(9)
• qcom_scm_call(9)
• qcom_scm_call_atomic(9)
• qcom_scm_set_warm_boot_addr(9)
• qcom_scm_set_cold_boot_addr(9)
• qcom_scm_cpu_power_down(9)
• qcom_scm_is_pas_available(9)
• qcom_scm_restore_sec_cfg_available(9)
• qcom_scm_assign_mem(9)
• qcom_scm_ocmem_lock_available(9)
• qcom_scm_ocmem_lock(9)
• qcom_scm_ocmem_unlock(9)
• qcom_scm_ice_available(9)
• qcom_scm_ice_invalidate_key(9)
• qcom_scm_ice_set_key(9)
• qcom_scm_derive_sw_secret(9)
• qcom_scm_generate_ice_key(9)
• qcom_scm_import_ice_key(9)
• qcom_scm_hdcp_available(9)
• qcom_scm_hdcp_req(9)
• qcom_scm_qseecom_call(9)
• qcom_scm_qseecom_get_version(9)
• qcom_scm_qseecom_app_get_id(9)
• qcom_scm_qseecom_app_send(9)
• qcom_scm_qtee_invoke_smc(9)
• qcom_scm_qtee_callback_response(9)
• qcom_scm_is_available(9)

okay bye bestie 💋 — source/version: ./drivers/firmware/qcom; date: October 2026. Periodt. 🫶