1 files changed, 6 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index b9e9bd854298..d7e736c53e51 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -890,6 +890,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
         edd=            [EDD]
                         Format: {"off" | "on" | "skip[mbr]"}
 
+        efi=            [EFI]
+                        Format: { "old_map" }
+                        old_map [X86-64]: switch to the old ioremap-based EFI
+                        runtime services mapping. 32-bit still uses this one by
+                        default.
+
         efi_no_storage_paranoia [EFI; X86]
                         Using this parameter you can use more than 50% of
                         your efi variable storage. Use this parameter only if