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Lu Baolu authored
By default, for performance consideration, Intel IOMMU driver won't flush IOTLB immediately after a buffer is unmapped. It schedules a thread and flushes IOTLB in a batched mode. This isn't suitable for untrusted device since it still can access the memory even if it isn't supposed to do so. Cc: Ashok Raj <ashok.raj@intel.com> Cc: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by:
Lu Baolu <baolu.lu@linux.intel.com> Tested-by:
Xu Pengfei <pengfei.xu@intel.com> Tested-by:
Mika Westerberg <mika.westerberg@intel.com> Signed-off-by:
Joerg Roedel <jroedel@suse.de>
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