Messages in this thread | | | From | "Tian, Kevin" <> | Subject | RE: [PATCH 2/2] iommu/vt-d: Avoid unnecessary global DMA cache invalidation | Date | Tue, 20 Sep 2022 07:51:42 +0000 |
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> 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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