Re: [Xen-devel] [PATCH 34/34] RFC x86: introduce directio virt cap

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Fri, Aug 17, 2018 at 04:12:52PM +0100, Wei Liu wrote:
> hvm_directio is set when iommu is enabled, but in fact iommu is not
> tied to HVM. In order to not break existing tools, expose a new flag
> directio for (iommu_enabled && !hvm_enabled).
> 
> RFC This doesn't build at the moment. Do we care about that flag being
> inaccurate?

I think there is no hardware out there with an IOMMU that don't have
virtualization extensions (ie: having VTd but not VTx for example),
but maybe I'm wrong.

Roger.

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