Hi Stefano,
> The tiny "xen,iommu-el2-v1" driver could be backported to the stable
> trees, I would imagine. Otherwise, do you have another suggestion?
There is stub IOMMU driver already merged to the Linux Kernel:
Commit 1ca55d50e50c74747a7b8846dac306fbe5ac4cf5 ("xen/grant-dma-iommu:
Introduce stub IOMMU driver" added by Oleksandr Tyshchenko.
I was able to use it as an empty IOMMU driver on my test setup:
Made the following device-tree changes:
xen_iommu: xen-iommu {
compatible = "xen,grant-dma";
iommu-cells = <0>;
};
i2c@e60b0000 {
iommus = <&xen_iommu 0x0>;
};
Maybe this driver can be used to solve the deferred problem with some
modifications?
What is your opinion?
Best regards,
Oleksii.
