[PATCH 0/4 v2] Implement access checks in iommu page fault paths

From: Joerg Roedel
Date: Tue Nov 17 2015 - 10:12:44 EST


here is the second version of the patch-set to implement
proper access checks into the io-page-fault handlers of the
AMD IOMMU and Intel VT-d drivers.

Two additional patches clean up the AMD part a bit further.
Since I can't test this this code myself due to lack of
hardware or software that utilizes it, I'd appreciate some
external testing.

It took me a while to get these out, mostly because I tried
to setup my own HSA test environment to at least test the
AMD changes myself. That failed, so I am sending this out
with another request for testing.

Oded, Jesse, would you two please test these patches and
report back? Thanks a lot!


Changes since v1:

* Updated the access_error functions based on
Linus' feedback
* Rebased to v4.4-rc1

Joerg Roedel (4):
iommu/amd: Do proper access checking before calling handle_mm_fault()
iommu/amd: Correctly set flags for handle_mm_fault call
iommu/amd: Cleanup error handling in do_fault()
iommu/vt-d: Do access checks before calling handle_mm_fault()

drivers/iommu/amd_iommu_v2.c | 54 +++++++++++++++++++++++++++-----------------
drivers/iommu/intel-svm.c | 20 ++++++++++++++++
2 files changed, 53 insertions(+), 21 deletions(-)


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