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intel_iommu: support passthrough (PT)

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Hardware support for VT-d device passthrough. Although current Linux can
live with iommu=pt even without this, but this is faster than when using
software passthrough.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Liu, Yi L <yi.l.liu@linux.intel.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Peter Xu 2017-05-19 11:19:47 +08:00 • committed by Michael S. Tsirkin
parent f80c98740e
commit dbaabb25f4
5 changed files with 177 additions and 59 deletions
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1
hw/i386/intel_iommu_internal.h
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@ -187,6 +187,7 @@
/* Interrupt Remapping support */
#define VTD_ECAP_IR (1ULL << 3)
#define VTD_ECAP_EIM (1ULL << 4)
#define VTD_ECAP_PT (1ULL << 6)
#define VTD_ECAP_MHMV (15ULL << 20)
/* CAP_REG */