Re: [Xen-devel] [PATCH v9 8/8] xen/arm: add dom0-less device assignment info to docs

[Julien Grall <julien.grall@xxxxxxx>]

Hi Stefano,

On 04/10/2019 02:14, Stefano Stabellini wrote:
> +
> +Dom0-less Device Passthrough
> +============================
> +
> +The partial device tree for dom0-less guests should have the following
> +properties for each node corresponding to a physical device to assign to
> +the guest:
> +
> +- xen,reg
> +
> +  The xen,reg property is an array of:
> +
> +    <phys_addr size guest_addr>
> +
> +  They specify the physical address and size of the device memory
> +  ranges together with the corresponding guest address to map them to.
> +  The size of `phys_addr' and `guest_addr' is determined by
> +  #address-cells, the size of `size' is determined by #size-cells, of
> +  the partial device tree.
> +  The memory will be mapped as device memory in the guest (Device-nGnRE).
> +
> +- xen,path
> +
> +  A string property representing the path in the host device tree to the
> +  corresponding device node.
> +
> +- xen,force-assign-without-iommu
Please add a newline here to match the rest of the documentation.

With that:

Acked-by: Julien Grall <julien.grall@xxxxxxx>

Cheers,

> +  If xen,force-assign-without-iommu is present, Xen allows to assign a
> +  device even if it is not behind an IOMMU. This renders your platform
> +  *unsafe* if the device is DMA-capable.
--
Julien Grall

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