iommu/vt-d: Global devTLB flush when present context entry changed

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This fixes a bug in context cache clear operation. The code was not
following the correct invalidation flow. A global device TLB invalidation
should be added after the IOTLB invalidation. At the same time, it
uses the domain ID from the context entry. But in scalable mode, the
domain ID is in PASID table entry, not context entry.

Fixes: 7373a8cc38 ("iommu/vt-d: Setup context and enable RID2PASID support")
Cc: stable@vger.kernel.org # v5.0+
Signed-off-by: Sanjay Kumar <sanjay.k.kumar@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20210712071315.3416543-1-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Sanjay Kumar 2021-07-12 15:13:15 +08:00 • committed by Joerg Roedel

parent ce36c94214

commit 37764b952e

1 changed files with 22 additions and 9 deletions

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drivers/iommu/intel/iommu.c

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