[PATCH] iommu/dma: Add support for DMA_ATTR_SYS_CACHE
isaacm at codeaurora.org
isaacm at codeaurora.org
Sat Oct 26 10:12:57 UTC 2019
On 2019-10-25 22:30, Christoph Hellwig wrote:
> The definition makes very little sense.
Can you please clarify what part doesn’t make sense, and why? This is
really just an extension of this patch that got mainlined, so that
clients that use the DMA API can use IOMMU_QCOM_SYS_CACHE as well:
https://patchwork.kernel.org/patch/10946099/
> Any without a user in the same series it is a complete no-go anyway.
IOMMU_QCOM_SYS_CACHE does not have any current users in the mainline,
nor did it have it in the patch series in which it got merged, yet it is
still present? Furthermore, there are plans to upstream support for one
of our SoCs that may benefit from this, as seen here:
https://www.spinics.net/lists/iommu/msg39608.html.
Thanks,
Isaac
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