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SubjectRE: [PATCH 2/2] iommu/vt-d: Avoid unnecessary global DMA cache invalidation
Date
> From: Lu Baolu <baolu.lu@linux.intel.com>
> Sent: Monday, September 19, 2022 2:25 PM
>
> Some VT-d hardware implementations invalidate all DMA remapping
> hardware
> translation caches as part of SRTP flow. The VT-d spec adds a ESRTPS
> (Enhanced Set Root Table Pointer Support, section 11.4.2 in VT-d spec)
> capability bit to indicate this. With this bit set, software has no need
> to issue the global invalidation request.
>
> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>

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

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