tee_shm_alloc_dma_mem(9)

💅 tee_shm_alloc_dma_mem 💅

okay so bestie, welcome to the Kernel API Manual entry for tee_shm_alloc_dma_mem(9) — yes that (9) means it's a kernel-internals thing, iykyk ✨

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🌸 NAME 🌸

tee_shm_alloc_dma_mem — Allocate DMA memory as shared memory object 🎀

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✨ SYNOPSIS ✨

struct tee_shm * tee_shm_alloc_dma_mem (struct tee_context *ctx , size_t
page_count );

like, it hands you back a struct tee_shm *, no cap 🫶

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🦋 ARGUMENTS 🦋

• ctx — the Context that allocates the shared memory, bestie. it's the one doing the allocating 💅
• page_count — the Number of pages. literally just how many pages we're talking about 🍓

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🌈 DESCRIPTION 🌈

so here's the vibe: the memory you allocate here is expected to be lent — like, made inaccessible to the kernel — to the TEE while it's being used, and then returned (accessible to the kernel again) before it's freed. the way that order matters 😭 don't skip the giving-it-back step, fr fr.

also important: this function should normally only be used internally in the TEE drivers. it's giving backstage-pass energy, not front-of-house 🙈

and yeah — it returns a pointer to 'struct tee_shm' 👑

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👑 SEE ALSO 👑

Kernel file ./drivers/tee/tee_shm.c — and the whole friend group 💖

• tee_shm_alloc_user_buf(9)
• tee_shm_alloc_kernel_buf(9)
• tee_shm_alloc_priv_buf(9)
• tee_shm_register_user_buf(9)
• tee_shm_register_kernel_buf(9)
• tee_shm_get_fd(9)
• tee_shm_free(9)
• tee_shm_get_va(9)
• tee_shm_get_pa(9)
• tee_shm_get_from_id(9)
• tee_shm_put(9)

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mwah 💋 this page lives under ./drivers/tee and it's dated October 2026 — go read the source, bestie, it slays ⭐🦋💜