| commit | 344cb4e0b6f3a0dbef0643eacb4946338eb228c0 | [log] [tgz] |
|---|---|---|
| author | Feng Wu <feng.wu@intel.com> | Thu Oct 15 10:19:11 2015 +0800 |
| committer | Joerg Roedel <jroedel@suse.de> | Thu Oct 15 16:21:55 2015 +0200 |
| tree | 2141ccf81ee92feef6f2073009df3523607cd847 | |
| parent | dfddb969edf021f21a45fc6fd019db4f99d12308 [diff] |
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>