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diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index a8ba119a4d53..6afd091bc1f8 100644
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+++ b/Documentation/kernel-parameters.txt
@@ -307,6 +307,19 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
behaviour to be specified. Bit 0 enables warnings,
bit 1 enables fixups, and bit 2 sends a segfault.
+ align_va_addr= [X86-64]
+ Align virtual addresses by clearing slice [14:12] when
+ allocating a VMA at process creation time. This option
+ gives you up to 3% performance improvement on AMD F15h
+ machines (where it is enabled by default) for a
+ CPU-intensive style benchmark, and it can vary highly in
+ a microbenchmark depending on workload and compiler.
+
+ 1: only for 32-bit processes
+ 2: only for 64-bit processes
+ on: enable for both 32- and 64-bit processes
+ off: disable for both 32- and 64-bit processes
+
amd_iommu= [HW,X86-84]
Pass parameters to the AMD IOMMU driver in the system.
Possible values are: