arm64: correct the effect of mitigations off on kpti

If KASLR is enabled, then kpti will be forced to be enabled even if
mitigations off, so we need to adjust the description of this parameter.

Signed-off-by: Liu Song <liusong@linux.alibaba.com>
Link: https://lore.kernel.org/r/1656033648-84181-1-git-send-email-liusong@linux.alibaba.com
Signed-off-by: Will Deacon <will@kernel.org>

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 2522b11e593f2397840d59541f9befcebed505b1..1f5f9c1c96df0797d5ab0bb494ac4197a63747c4 100644 (file)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -3161,7 +3161,7 @@
                                improves system performance, but it may also
                                expose users to several CPU vulnerabilities.
                                Equivalent to: nopti [X86,PPC]
-                                              kpti=0 [ARM64]
+                                              if nokaslr then kpti=0 [ARM64]
                                               nospectre_v1 [X86,PPC]
                                               nobp=0 [S390]
                                               nospectre_v2 [X86,PPC,S390,ARM64]