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-rw-r--r--Documentation/admin-guide/kernel-parameters.txt8
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diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index efc7aa7a0670..8e29c4b6756f 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2687,6 +2687,14 @@
nosmt [KNL,S390] Disable symmetric multithreading (SMT).
Equivalent to smt=1.
+ [KNL,x86] Disable symmetric multithreading (SMT).
+ nosmt=force: Force disable SMT, similar to disabling
+ it in the BIOS except that some of the
+ resource partitioning effects which are
+ caused by having SMT enabled in the BIOS
+ cannot be undone. Depending on the CPU
+ type this might have a performance impact.
+
nospectre_v2 [X86] Disable all mitigations for the Spectre variant 2
(indirect branch prediction) vulnerability. System may
allow data leaks with this option, which is equivalent