iommu/vt-d: Preset Access/Dirty bits for IOVA over FL

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The Access/Dirty bits in the first level page table entry will be set
whenever a page table entry was used for address translation or write
permission was successfully translated. This is always true when using
the first-level page table for kernel IOVA. Instead of wasting hardware
cycles to update the certain bits, it's better to set them up at the
beginning.

Suggested-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20210115004202.953965-1-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Lu Baolu 2021-01-15 08:42:02 +08:00 • committed by Joerg Roedel

parent f2dd871799

commit a8ce9ebbec

2 changed files with 14 additions and 2 deletions

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14

drivers/iommu/intel/iommu.c

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2

include/linux/intel-iommu.h

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