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From: Jean-Philippe Brucker <jean-philippe@linaro.org>
To: linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	iommu@lists.linux-foundation.org, joro@8bytes.org,
	bhelgaas@google.com
Cc: Jean-Philippe Brucker <jean-philippe@linaro.org>,
	ashok.raj@intel.com, will@kernel.org, hch@infradead.org,
	alex.williamson@redhat.com, robin.murphy@arm.com,
	dwmw2@infradead.org
Subject: [PATCH v2 0/4] PCI, iommu: Factor 'untrusted' check for ATS enablement
Date: Wed, 20 May 2020 17:21:59 +0200
Message-ID: <20200520152201.3309416-1-jean-philippe@linaro.org> (raw)

IOMMU drivers currently check themselves if a device is untrusted
(plugged into an external-facing port) before enabling ATS. Move the
check to drivers/pci. The only functional change should be to the AMD
IOMMU driver. With this change all IOMMU drivers block 'Translated' PCIe
transactions and Translation Requests from untrusted devices.

Since v1 [1] I added tags, addressed comments on patches 1 and 3, and
fixed a regression in patch 3.

[1] https://lore.kernel.org/linux-iommu/20200515104359.1178606-1-jean-philippe@linaro.org/

Jean-Philippe Brucker (4):
  PCI/ATS: Only enable ATS for trusted devices
  iommu/amd: Use pci_ats_supported()
  iommu/arm-smmu-v3: Use pci_ats_supported()
  iommu/vt-d: Use pci_ats_supported()

 include/linux/pci-ats.h     |  3 +++
 drivers/iommu/amd_iommu.c   | 12 ++++--------
 drivers/iommu/arm-smmu-v3.c | 20 +++++++-------------
 drivers/iommu/intel-iommu.c |  9 +++------
 drivers/pci/ats.c           | 18 +++++++++++++++++-
 5 files changed, 34 insertions(+), 28 deletions(-)

-- 
2.26.2

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Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-20 15:21 Jean-Philippe Brucker [this message]
2020-05-20 15:22 ` [PATCH v2 1/4] PCI/ATS: Only enable ATS for trusted devices Jean-Philippe Brucker
2020-05-20 15:22 ` [PATCH v2 2/4] iommu/amd: Use pci_ats_supported() Jean-Philippe Brucker
2020-05-20 15:22 ` [PATCH v2 3/4] iommu/arm-smmu-v3: " Jean-Philippe Brucker
2020-05-21 10:29   ` Will Deacon
2020-05-20 15:22 ` [PATCH v2 4/4] iommu/vt-d: " Jean-Philippe Brucker
2020-05-27  9:38 ` [PATCH v2 0/4] PCI, iommu: Factor 'untrusted' check for ATS enablement Jean-Philippe Brucker
2020-05-27 12:36 ` Joerg Roedel

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