RE: [PATCH v2 01/12] iommu/vt-d: Enumerate the scalable mode capability

[Tian, Kevin]

> From: Lu Baolu [mailto:baolu.lu@xxxxxxxxxxxxxxx]
> Sent: Thursday, August 30, 2018 9:35 AM
> 
> The Intel vt-d spec rev3.0 introduces a new translation
> mode called scalable mode, which enables PASID-granular
> translations for first level, second level, nested and
> pass-through modes. At the same time, the previous
> Extended Context (ECS) mode is deprecated (no production
> ever implements ECS).
> 
> This patch adds enumeration for Scalable Mode and removes
> the deprecated ECS enumeration. It provides a boot time
> option to disable scalable mode even hardware claims to
> support it.
> 
> Cc: Ashok Raj <ashok.raj@xxxxxxxxx>
> Cc: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>
> Cc: Kevin Tian <kevin.tian@xxxxxxxxx>
> Cc: Liu Yi L <yi.l.liu@xxxxxxxxx>
> Signed-off-by: Sanjay Kumar <sanjay.k.kumar@xxxxxxxxx>
> Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> Reviewed-by: Ashok Raj <ashok.raj@xxxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>