Re: [PATCH v2 1/1] iommu/vt-d: Add Kconfig option to enable/disable scalable mode

[Qian Cai]

> On Nov 8, 2019, at 10:43 PM, Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx> wrote:
> 
> +config INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON
> +    prompt "Enable Intel IOMMU scalable mode by default"
> +    depends on INTEL_IOMMU
> +    help
> +      Selecting this option will enable the scalable mode if
> +      hardware presents the capability. If this option is not
> +      selected, scalable mode support could also be enabled
> +      by passing intel_iommu=sm_on to the kernel.
> +

Does it also make sense to mention which hardware presents this capability or how to check it?