Re: [Xen-devel] [xen/arm]: Mapping physical memory to dom0/domU

[Julien Grall <julien.grall@xxxxxxx>]

On 29/05/2019 15:06, Lukas Jünger wrote:
> Hi all,
Hi,

> Is there a way to map a region of physical memory to dom0/domU?
Yes, you can use the option 'iomem'.

> Let's say I have a custom device mapped at that memory region and I want either 
> dom0 or a domU to have full access to this device.
The page [1] will give you instruction how to passthrough a device.

> There seems to be a way to share memory between dom0 and a domU, maybe also 
> between domU and domU.
This can be done dynamically using grant-table. There are patches on the ML for 
static sharing.
Cheers,

> Thanks,
> Lukas
[1] https://xenbits.xen.org/docs/unstable/misc/arm/passthrough.txt

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--
Julien Grall

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