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Date: Mon, 18 Oct 2021 12:25:38 +0200
From: Joerg Roedel <joro@8bytes.org>
To: Boris Brezillon <boris.brezillon@collabora.com>
Cc: iommu@lists.linux-foundation.org, Rob Herring <robh+dt@kernel.org>,
 Tomeu Vizoso <tomeu.vizoso@collabora.com>,
 Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>,
 Steven Price <steven.price@arm.com>,
 Robin Murphy <robin.murphy@arm.com>, Will Deacon <will@kernel.org>,
 linux-arm-kernel@lists.infradead.org, dri-devel@lists.freedesktop.org
Subject: Re: [PATCH v2 1/5] [RFC]iommu: Add a IOMMU_DEVONLY protection flag
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References: <20211001143427.1564786-1-boris.brezillon@collabora.com>
 <20211001143427.1564786-2-boris.brezillon@collabora.com>
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On Fri, Oct 01, 2021 at 04:34:23PM +0200, Boris Brezillon wrote:
> +/*
> + * Mapping is only accessed by the device behind the iommu. That means other
> + * devices or CPUs are not expected to access this physical memory region,
> + * and the MMU driver can safely restrict the shareability domain to the
> + * device itself.
> + */
> +#define IOMMU_DEVONLY	(1 << 6)

I am not entirely happy with the name, how about

	IOMMU_DEV_PRIVATE?

PRIV would conflict with IOMMU_PRIV (which should probably also be
IOMMU_PRIVILEGED, but thats another problem).

Regards,

	Joerg