[dpdk-dev] [PATCH] eal: add option to force IOVA as PA mode

[Hemant Agrawal]

On 11/30/2017 8:27 AM, Chas Williams wrote:
> From: Chas Williams <chas3 at att.com>
>
> The IOMMU in some machines report that they can only support
> limited widths.  IOVA virtual addresses may exceed this width
> making the use of IOVA virtual addresses difficult.  The option
> CONFIG_RTE_LIBRTE_USE_PHYS_IOVA can used to force IOVA physical
> address usage.
>

Is it possible to dynamically detect the machine limitation in bus iova 
code instead of compile time option?