Re: [PATCH] libxl: arm: Allow grant mappings for backends running on Dom0

[Viresh Kumar <viresh.kumar@xxxxxxxxxx>]

On 05-04-23, 05:12, Viresh Kumar wrote:
> On 04-04-23, 21:16, Oleksandr Tyshchenko wrote:
> > ok, probably makes sense
> 
> While testing both foreign and grant mappings I stumbled upon another
> related problem. How do I control the creation of iommu node from
> guest configuration file, irrespective of the domain backend is
> running at ? This is what we have right now:
> 
> - always create iommu nodes if backend-dom != 0
> - always create iommu nodes if forced_grant == 1
> 
> what I need to cover is
> - don't create iommu nodes irrespective of the domain
> 
> This is required if you want to test both foreign and grant memory
> allocations, with different guests kernels. i.e. one guest kernel for
> device with grant mappings and another guest for device with foreign
> mappings. There is no way, that I know of, to disable the creation of
> iommu nodes. Of course we would want to use the same images for kernel
> and other stuff, so this needs to be controlled from guest
> configuration file.

Any input on this please ?

-- 
viresh