iommu/vt-d: Don't switch off swiotlb if bounce page is used

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The bounce page implementation depends on swiotlb. Hence, don't
switch off swiotlb if the system has untrusted devices or could
potentially be hot-added with any untrusted devices.

Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Lu Baolu 2019-09-06 14:14:50 +08:00 • committed by Joerg Roedel

parent e5e04d0519

commit c5a5dc4cbb

2 changed files with 18 additions and 15 deletions

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1

drivers/iommu/Kconfig

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32

drivers/iommu/intel-iommu.c

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