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[v1,0/2] Add page alignment check in Intel IOMMU.

Message ID cover.1549478584.git.sathyanarayanan.kuppuswamy@linux.intel.com
Headers show
Series Add page alignment check in Intel IOMMU. | expand

Message

Kuppuswamy Sathyanarayanan Feb. 7, 2019, 6:41 p.m. UTC 
From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>

As per Intel vt-d specification, Rev 3.0 (section 7.5.1.1, title
"Page Request Descriptor"), Intel IOMMU page request descriptor
only uses bits[63:12] of the page address. Hence its required to
enforce that the device will only send page request with
page-aligned address. So, this patch set adds support to verify
whether the device uses page aligned address before enabling the
ATS service in Intel IOMMU driver.

Kuppuswamy Sathyanarayanan (2):
  PCI: ATS: Add function to check ATS page aligned request status.
  iommu/vt-d: Enable ATS only if the device uses page aligned address.

 drivers/iommu/intel-iommu.c   |  1 +
 drivers/pci/ats.c             | 22 ++++++++++++++++++++++
 include/linux/pci.h           |  2 ++
 include/uapi/linux/pci_regs.h |  1 +
 4 files changed, 26 insertions(+)