iommu/vt-d: Add cache tag invalidation helpers

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Add several helpers to invalidate the caches after mappings in the
affected domain are changed.

- cache_tag_flush_range() invalidates a range of caches after mappings
  within this range are changed. It uses the page-selective cache
  invalidation methods.

- cache_tag_flush_all() invalidates all caches tagged by a domain ID.
  It uses the domain-selective cache invalidation methods.

- cache_tag_flush_range_np() invalidates a range of caches when new
  mappings are created in the domain and the corresponding page table
  entries change from non-present to present.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20240416080656.60968-3-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Lu Baolu 2024-04-24 15:16:34 +08:00 • committed by Joerg Roedel

parent 3b1d9e2b2d

commit c4d27ffaa8

3 changed files with 209 additions and 12 deletions

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195

drivers/iommu/intel/cache.c

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12

drivers/iommu/intel/iommu.c

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14

drivers/iommu/intel/iommu.h

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