[RFC PATCH v1 0/6] Resolve unwanted DMA backing with IOMMU

Joerg Roedel joro at 8bytes.org
Fri Jul 27 08:25:13 UTC 2018


On Fri, Jul 27, 2018 at 02:16:18AM +0300, Dmitry Osipenko wrote:
> The proposed solution adds a new option to the base device driver
> structure that allows device drivers to explicitly convey to the drivers
> core that the implicit IOMMU backing for devices must not happen.

Why is IOMMU mapping a problem for the Tegra GPU driver?

If we add something like this then it should not be the choice of the
device driver, but of the user and/or the firmware.


	Joerg



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