linux-kernel - Re: [PATCH v12 3/9] tee: implement protected DMA-heap

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Message-ID: <20251002-sceptical-goose-of-fame-7b33d6@houat>
Date: Thu, 2 Oct 2025 09:54:39 +0200
From: Maxime Ripard <mripard@...hat.com>
To: Jens Wiklander <jens.wiklander@...aro.org>
Cc: linux-kernel@...r.kernel.org, linux-media@...r.kernel.org, 
	dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org, op-tee@...ts.trustedfirmware.org, 
	linux-arm-kernel@...ts.infradead.org, Olivier Masse <olivier.masse@....com>, 
	Thierry Reding <thierry.reding@...il.com>, Yong Wu <yong.wu@...iatek.com>, 
	Sumit Semwal <sumit.semwal@...aro.org>, Benjamin Gaignard <benjamin.gaignard@...labora.com>, 
	Brian Starkey <Brian.Starkey@....com>, John Stultz <jstultz@...gle.com>, 
	"T . J . Mercier" <tjmercier@...gle.com>, Christian König <christian.koenig@....com>, 
	Sumit Garg <sumit.garg@...nel.org>, Matthias Brugger <matthias.bgg@...il.com>, 
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, azarrabi@....qualcomm.com, 
	Simona Vetter <simona.vetter@...ll.ch>, Daniel Stone <daniel@...ishbar.org>, 
	Rouven Czerwinski <rouven.czerwinski@...aro.org>, robin.murphy@....com, Sumit Garg <sumit.garg@....qualcomm.com>
Subject: Re: [PATCH v12 3/9] tee: implement protected DMA-heap

On Thu, Sep 11, 2025 at 03:49:44PM +0200, Jens Wiklander wrote:
> +static const char *heap_id_2_name(enum tee_dma_heap_id id)
> +{
> +	switch (id) {
> +	case TEE_DMA_HEAP_SECURE_VIDEO_PLAY:
> +		return "protected,secure-video";
> +	case TEE_DMA_HEAP_TRUSTED_UI:
> +		return "protected,trusted-ui";
> +	case TEE_DMA_HEAP_SECURE_VIDEO_RECORD:
> +		return "protected,secure-video-record";
> +	default:
> +		return NULL;
> +	}
> +}

We've recently agreed on a naming guideline (even though it's not merged yet)

https://lore.kernel.org/r/20250728-dma-buf-heap-names-doc-v4-1-f73f71cf0dfd@kernel.org

Secure and trusted should be defined I guess, because secure and
protected at least seem redundant to me.

Maxime

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