TEE_IOC_OPEN_SESSION(9)

💖 TEE_IOC_OPEN_SESSION — honestly iconic behavior 💖

okay so bestie, you're in the Kernel API Manual section (section 9, iykyk) and the star of the show is TEE_IOC_OPEN_SESSION(9). yes the title is a whole mouthful but we move 🫶

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✨ NAME ✨

TEE_IOC_OPEN_SESSION — literally just opens a session to a Trusted Application. that's it. that's the whole vibe. 🎀

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✨ SYNOPSIS ✨

TEE_IOC_OPEN_SESSION

no args on the line, no drama, she's lowkey mysterious like that 💅

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✨ DESCRIPTION ✨

okay so this one is so specific and I need you to follow along bestie:

it takes a struct tee_ioctl_buf_data — yes, that struct — which contains a struct tee_ioctl_open_session_arg… and then right after that? any array of struct tee_ioctl_param. 😭 like it's a little sandwich: buf_data on the outside, open_session_arg first, then the param array just vibing behind it.

ngl if you get the packing wrong it's giving 💀 — the layout is the contract, so don't be cute with it.

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✨ SEE ALSO ✨

the whole friend group shows up for this one, no gatekeeping 👑

• Kernel file ./include/uapi/linux/tee.h
• struct tee_ioctl_version_data(9)
• TEE_IOC_VERSION(9)
• struct tee_ioctl_shm_alloc_data(9)
• TEE_IOC_SHM_ALLOC(9)
• struct tee_ioctl_buf_data(9)
• struct tee_ioctl_param(9)
• struct tee_ioctl_open_session_arg(9)
• struct tee_ioctl_invoke_arg(9)
• TEE_IOC_INVOKE(9)
• struct tee_ioctl_cancel_arg(9)
• TEE_IOC_CANCEL(9)
• struct tee_ioctl_close_session_arg(9)
• TEE_IOC_CLOSE_SESSION(9)
• struct tee_iocl_supp_recv_arg(9)
• TEE_IOC_SUPPL_RECV(9)
• struct tee_iocl_supp_send_arg(9)
• TEE_IOC_SUPPL_SEND(9)
• struct tee_ioctl_shm_register_data(9)
• struct tee_ioctl_shm_register_fd_data(9)
• TEE_IOC_SHM_REGISTER_FD(9)
• TEE_IOC_SHM_REGISTER(9)
• struct tee_ioctl_object_invoke_arg(9)

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anyway that's the whole page diva, go open that session 💜

source: ./include/uapi/linux · version/date: October 2026 — stan this manpage, it ate and left no crumbs 🔥👑✨