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Documentation: Document arm64 kpti control

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commit de19055564c8f8f9d366f8db3395836da0b2176c upstream.

For a while Arm64 has been capable of force enabling
or disabling the kpti mitigations. Lets make sure the
documentation reflects that.

Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
[florian: patch the correct file]
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jeremy Linton 2019-01-25 12:07:00 -06:00 committed by Greg Kroah-Hartman
parent 5177299627
commit 8973a61e77
1 changed files with 6 additions and 0 deletions
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6
Documentation/kernel-parameters.txt
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@ -1965,6 +1965,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
kmemcheck=2 (one-shot mode)
Default: 2 (one-shot mode)
kpti= [ARM64] Control page table isolation of user
and kernel address spaces.
Default: enabled on cores which need mitigation.
0: force disabled
1: force enabled
kstack=N [X86] Print N words from the kernel stack
in oops dumps.