[PATCH v2 0/2] Add page alignment check in Intel IOMMU.

From: sathyanarayanan . kuppuswamy
Date: Mon Feb 11 2019 - 16:45:04 EST

From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>

As per Intel vt-d specification, Rev 3.0 (section, title "Page Request Descriptor"), Intel IOMMU Page Request Descriptor only provides 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 alignment status.
iommu/vt-d: Enable ATS only if the device uses page aligned address.

drivers/iommu/intel-iommu.c | 1 +
drivers/pci/ats.c | 24 ++++++++++++++++++++++++
include/linux/pci.h | 2 ++
include/uapi/linux/pci_regs.h | 1 +
4 files changed, 28 insertions(+)