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

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Date:	Tue, 17 Nov 2015 16:11:35 +0100
From:	Joerg Roedel <joro@...tes.org>
To:	iommu@...ts.linux-foundation.org
Cc:	Oded Gabbay <oded.gabbay@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Joerg Roedel <joro@...tes.org>
Subject: [PATCH 0/4 v2] Implement access checks in iommu page fault paths

Hi,

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!

	Joerg

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(-)

-- 
1.9.1

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