iommu/vt-d: Add page request draining support

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When a PASID is stopped or terminated, there can be pending PRQs
(requests that haven't received responses) in remapping hardware.
This adds the interface to drain page requests and call it when a
PASID is terminated.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20200516062101.29541-16-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Lu Baolu 2020-05-16 14:20:58 +08:00 • committed by Joerg Roedel

parent 37e91bd4b3

commit 66ac4db36f

2 changed files with 106 additions and 5 deletions

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107

drivers/iommu/intel-svm.c

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4

include/linux/intel-iommu.h

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