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| author | Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> | 2019-02-19 22:06:10 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2019-02-26 13:08:07 +0300 |
| commit | 61363c1474b146114fb4c5e5af2908c8afcf1c5e (patch) | |
| tree | b7e76c9f937ae6909ab9f3dbec118e5a79fdebc4 /drivers/iommu/iommu-sysfs.c | |
| parent | 8c938ddc6df3bbe72809db1be6c9f3af83f5d7a9 (diff) | |
| download | linux-61363c1474b146114fb4c5e5af2908c8afcf1c5e.tar.xz | |
iommu/vt-d: Enable ATS only if the device uses page aligned address.
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 Intel IOMMU driver would only
permit devices that advertise they would only send Page Aligned Requests
to participate in ATS service.
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Keith Busch <keith.busch@intel.com>
Suggested-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/iommu-sysfs.c')
0 files changed, 0 insertions, 0 deletions