Re: [PATCH v2 22/22] intel_iommu: modify x-scalable-mode to be string option

[Peter Xu]

On Sun, Mar 29, 2020 at 09:25:01PM -0700, Liu Yi L wrote:
> Intel VT-d 3.0 introduces scalable mode, and it has a bunch of capabilities
> related to scalable mode translation, thus there are multiple combinations.
> While this vIOMMU implementation wants simplify it for user by providing
> typical combinations. User could config it by "x-scalable-mode" option. The
> usage is as below:
> 
> "-device intel-iommu,x-scalable-mode=["legacy"|"modern"|"off"]"
> 
>  - "legacy": gives support for SL page table
>  - "modern": gives support for FL page table, pasid, virtual command
>  - "off": no scalable mode support
>  -  if not configured, means no scalable mode support, if not proper
>     configured, will throw error
> 
> Note: this patch is supposed to be merged when  the whole vSVA patch series
> were merged.
> 
> Cc: Kevin Tian <address@hidden>
> Cc: Jacob Pan <address@hidden>
> Cc: Peter Xu <address@hidden>
> Cc: Yi Sun <address@hidden>
> Cc: Paolo Bonzini <address@hidden>
> Cc: Richard Henderson <address@hidden>
> Cc: Eduardo Habkost <address@hidden>
> Signed-off-by: Liu Yi L <address@hidden>
> Signed-off-by: Yi Sun <address@hidden>

Reviewed-by: Peter Xu <address@hidden>

-- 
Peter Xu