iommu/vt-d: Remove global page flush support

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Global pages support is removed from VT-d spec 3.0. Since global pages G
flag only affects first-level paging structures and because DMA request
with PASID are only supported by VT-d spec. 3.0 and onward, we can
safely remove global pages support.

For kernel shared virtual address IOTLB invalidation, PASID
granularity and page selective within PASID will be used. There is
no global granularity supported. Without this fix, IOTLB invalidation
will cause invalid descriptor error in the queued invalidation (QI)
interface.

Fixes: 1c4f88b7f1 ("iommu/vt-d: Shared virtual address in scalable mode")
Reported-by: Sanjay K Kumar <sanjay.k.kumar@intel.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Jacob Pan 2019-08-26 08:53:29 -07:00 • committed by Joerg Roedel

parent 0ce4a85f4f

commit 8744daf4b0

2 changed files with 15 additions and 24 deletions

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36

drivers/iommu/intel-svm.c

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3

include/linux/intel-iommu.h

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