[lkml]   [2019]   [Feb]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Subject[PATCH v2 0/2] Add page alignment check in Intel IOMMU.
From: Kuppuswamy Sathyanarayanan <>

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(+)


 \ /
  Last update: 2019-02-11 22:45    [W:0.027 / U:1.968 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site