Feng Wu 344cb4e0b6 iommu/vt-d: Use cmpxchg16b to update posted format IRTE atomically
If IRTE is in posted format, the 'pda' field goes across the 64-bit
boundary, we need use cmpxchg16b to atomically update it. We only
expose posted-interrupt when X86_FEATURE_CX16 is supported and use
to update it atomically.

Signed-off-by: Feng Wu <feng.wu@intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-10-15 16:21:55 +02:00
..
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