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* [PATCH v1 0/2] Add page alignment check in Intel IOMMU.
@ 2019-02-07 18:41 sathyanarayanan.kuppuswamy
  2019-02-07 18:41 ` [PATCH v1 1/2] PCI: ATS: Add function to check ATS page aligned request status sathyanarayanan.kuppuswamy
  2019-02-07 18:41 ` [PATCH v1 2/2] iommu/vt-d: Enable ATS only if the device uses page aligned address sathyanarayanan.kuppuswamy
  0 siblings, 2 replies; 13+ messages in thread
From: sathyanarayanan.kuppuswamy @ 2019-02-07 18:41 UTC (permalink / raw)
  To: bhelgaas, joro, dwmw2; +Cc: linux-pci, iommu, linux-kernel

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(+)

-- 
2.20.1


^ permalink raw reply	[flat|nested] 13+ messages in thread

end of thread, other threads:[~2019-02-11 20:35 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-02-07 18:41 [PATCH v1 0/2] Add page alignment check in Intel IOMMU sathyanarayanan.kuppuswamy
2019-02-07 18:41 ` [PATCH v1 1/2] PCI: ATS: Add function to check ATS page aligned request status sathyanarayanan.kuppuswamy
2019-02-07 20:07   ` Bjorn Helgaas
2019-02-07 20:39     ` sathyanarayanan kuppuswamy
2019-02-07 20:38   ` Sinan Kaya
2019-02-07 22:16     ` sathyanarayanan kuppuswamy
2019-02-08  1:58       ` Sinan Kaya
2019-02-09  1:02         ` sathyanarayanan kuppuswamy
2019-02-09  4:49           ` Sinan Kaya
2019-02-11 19:15             ` Raj, Ashok
2019-02-11 19:24               ` sathyanarayanan kuppuswamy
2019-02-11 20:35               ` Sinan Kaya
2019-02-07 18:41 ` [PATCH v1 2/2] iommu/vt-d: Enable ATS only if the device uses page aligned address sathyanarayanan.kuppuswamy

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