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x86/speculation: Fix incorrect MDS/TAA mitigation status
[sagit-ice-cold/kernel_xiaomi_msm8998.git]
/
Documentation
/
kernel-parameters.txt
diff --git
a/Documentation/kernel-parameters.txt
b/Documentation/kernel-parameters.txt
index
70f05fc
..
da9acfb
100644
(file)
--- a/
Documentation/kernel-parameters.txt
+++ b/
Documentation/kernel-parameters.txt
@@
-2054,6
+2054,12
@@
bytes respectively. Such letter suffixes can also be entirely omitted.
full - Enable MDS mitigation on vulnerable CPUs
off - Unconditionally disable MDS mitigation
full - Enable MDS mitigation on vulnerable CPUs
off - Unconditionally disable MDS mitigation
+ On TAA-affected machines, mds=off can be prevented by
+ an active TAA mitigation as both vulnerabilities are
+ mitigated with the same mechanism so in order to disable
+ this mitigation, you need to specify tsx_async_abort=off
+ too.
+
Not specifying this option is equivalent to
mds=full.
Not specifying this option is equivalent to
mds=full.
@@
-4105,6
+4111,11
@@
bytes respectively. Such letter suffixes can also be entirely omitted.
off - Unconditionally disable TAA mitigation
off - Unconditionally disable TAA mitigation
+ On MDS-affected machines, tsx_async_abort=off can be
+ prevented by an active MDS mitigation as both vulnerabilities
+ are mitigated with the same mechanism so in order to disable
+ this mitigation, you need to specify mds=off too.
+
Not specifying this option is equivalent to
tsx_async_abort=full. On CPUs which are MDS affected
and deploy MDS mitigation, TAA mitigation is not
Not specifying this option is equivalent to
tsx_async_abort=full. On CPUs which are MDS affected
and deploy MDS mitigation, TAA mitigation is not