Re: [PATCH 1/1] x86/tboot: Don't disable swiotlb when iommu is forced on

Konrad Rzeszutek Wilk
2020-11-25T15:42:44Z

On Wed, Nov 25, 2020 at 02:05:15PM +0000, Will Deacon wrote:
> On Wed, 25 Nov 2020 09:41:24 +0800, Lu Baolu wrote:
> > After commit 327d5b2fee91c ("iommu/vt-d: Allow 32bit devices to uses DMA
> > domain"), swiotbl could also be used for direct memory access if IOMMU
> > is enabled but a device is configured to pass through the DMA translation.
> > Keep swiotlb when IOMMU is forced on, otherwise, some devices won't work
> > if "iommu=pt" kernel parameter is used.
>
> Applied to arm64 (for-next/iommu/fixes), thanks!
>
> [1/1] x86/tboot: Don't disable swiotlb when iommu is forced on
> https://git.kernel.org/arm64/c/e2be2a833ab5

But tboot never ran on ARM. It is a Intel specifc.

I think either me or Thomas should take this patch.