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| author | Lu Baolu <baolu.lu@linux.intel.com> | 2018-12-10 09:58:55 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2018-12-11 10:45:57 +0100 |
| commit | 765b6a98c1de3d84dfdae344cc4ee4c24d9447f7 (patch) | |
| tree | b249638f982910e2dd79da1e6c4c91644bc08a6d /Documentation/admin-guide/kernel-parameters.txt | |
| parent | 3569dd07aaad71920c5ea4da2d5cc9a167c1ffd4 (diff) | |
| download | lwn-765b6a98c1de3d84dfdae344cc4ee4c24d9447f7.tar.gz lwn-765b6a98c1de3d84dfdae344cc4ee4c24d9447f7.zip | |
iommu/vt-d: Enumerate the scalable mode capability
The Intel vt-d spec rev3.0 introduces a new translation
mode called scalable mode, which enables PASID-granular
translations for first level, second level, nested and
pass-through modes. At the same time, the previous
Extended Context (ECS) mode is deprecated (no production
ever implements ECS).
This patch adds enumeration for Scalable Mode and removes
the deprecated ECS enumeration. It provides a boot time
option to disable scalable mode even hardware claims to
support it.
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Sanjay Kumar <sanjay.k.kumar@intel.com>
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Ashok Raj <ashok.raj@intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'Documentation/admin-guide/kernel-parameters.txt')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 81d1d5a74728..abe9769a9276 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1682,12 +1682,12 @@ By default, super page will be supported if Intel IOMMU has the capability. With this option, super page will not be supported. - ecs_off [Default Off] - By default, extended context tables will be supported if - the hardware advertises that it has support both for the - extended tables themselves, and also PASID support. With - this option set, extended tables will not be used even - on hardware which claims to support them. + sm_off [Default Off] + By default, scalable mode will be supported if the + hardware advertises that it has support for the scalable + mode translation. With this option set, scalable mode + will not be used even on hardware which claims to support + it. tboot_noforce [Default Off] Do not force the Intel IOMMU enabled under tboot. By default, tboot will force Intel IOMMU on, which |