Thread (65 messages) 65 messages, 8 authors, 2021-08-03

Re: [PATCH v2 19/24] iommu: Expose DMA domain strictness via sysfs

From: John Garry <hidden>
Date: 2021-07-30 10:21:12
Also in: linux-iommu, lkml

On 28/07/2021 16:58, Robin Murphy wrote:
The sysfs interface for default domain types exists primarily so users
can choose the performance/security tradeoff relevant to their own
workload. As such, the choice between the policies for DMA domains fits
perfectly as an additional point on that scale - downgrading a
particular device from a strict default to non-strict may be enough to
let it reach the desired level of performance, while still retaining
more peace of mind than with a wide-open identity domain. Now that we've
abstracted non-strict mode as a distinct type of DMA domain, allow it to
be chosen through the user interface as well.

Signed-off-by: Robin Murphy<robin.murphy@arm.com>
---
Reviewed-by: John Garry <redacted>

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