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63356baf
2020 Jun 12
0
[PATCH] s390: protvirt: virtio: Refuse device without IOMMU
...t's refuse a VIRTIO device which does not use IOMMU
>> protected access.
>>
> Stupid questions:
not stupid at all. :)
>
> 1. Do all CPU families we care about (which are?) support IOMMU? Ex:
> would it recognize an ARM thingie with SMMU? [1]
In Message-ID: <6356ba7f-afab-75e1-05ff-4a22b88c610e at linux.ibm.com>
(as answer to Jason) I modified the patch and propose to take care of
this problem by using force_dma_unencrypted() inside virtio core instead
of a S390 specific test.
If we use force_dma_unencrypted(dev) to check if we must refuse a device
witho...