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

From: Joerg Roedel
Date: Fri Jul 27 2018 - 04:25:18 EST

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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

Next message: Jia-Ju Bai: "[PATCH] net: jme: Replace mdelay() with msleep() and usleep_range() in jme_wait_link()"
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In reply to: Dmitry Osipenko: "[RFC PATCH v1 2/6] of/device: Don't back devices DMA with IOMMU if that's undesired by driver"
Next in thread: Will Deacon: "Re: [RFC PATCH v1 0/6] Resolve unwanted DMA backing with IOMMU"
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