tree 23955634ded577e53c46390714a6f069b4587c86
parent 2bbc419f9d51b44f3fdeea12c5b786bdace82b8e
author Jon Mason <jdmason@us.ibm.com> 1151323085 +0200
committer Linus Torvalds <torvalds@g5.osdl.org> 1151344098 -0700

[PATCH] x86_64: Calgary IOMMU - introduce iommu_detected

swiotlb relies on the gart specific iommu_aperture variable to know if
we discovered a hardware IOMMU before swiotlb initialization.  Introduce
iommu_detected to do the same thing, but in a HW IOMMU neutral manner,
in preparation for adding the Calgary HW IOMMU.

Signed-Off-By: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-Off-By: Jon Mason <jdmason@us.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>