diff options
| author | Joerg Roedel <joerg.roedel@amd.com> | 2008-11-17 15:09:20 +0100 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2008-11-18 15:44:31 +0100 |
| commit | 3ce1f93c6d53c3f91c3846cf66b018276c8ac2e7 (patch) | |
| tree | b6dd5e06c031f03aa7c81da818e90c52569707f9 /Documentation | |
| parent | e5e1f606ecbf67e52ebe2df5d14f8b94ec6544d0 (diff) | |
AMD IOMMU: enable device isolation per default
Impact: makes device isolation the default for AMD IOMMU
Some device drivers showed double-free bugs of DMA memory while testing
them with AMD IOMMU. If all devices share the same protection domain
this can lead to data corruption and data loss. Prevent this by putting
each device into its own protection domain per default.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index b56ee02d251..f2e1e7fc0ff 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -294,7 +294,7 @@ and is between 256 and 4096 characters. It is defined in the file Possible values are: isolate - enable device isolation (each device, as far as possible, will get its own protection - domain) + domain) [default] share - put every device behind one IOMMU into the same protection domain fullflush - enable flushing of IO/TLB entries when |