| From de19055564c8f8f9d366f8db3395836da0b2176c Mon Sep 17 00:00:00 2001 |
| From: Jeremy Linton <jeremy.linton@arm.com> |
| Date: Fri, 25 Jan 2019 12:07:00 -0600 |
| Subject: Documentation: Document arm64 kpti control |
| |
| From: Jeremy Linton <jeremy.linton@arm.com> |
| |
| 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> |
| |
| --- |
| Documentation/kernel-parameters.txt | 6 ++++++ |
| 1 file changed, 6 insertions(+) |
| |
| --- a/Documentation/kernel-parameters.txt |
| +++ b/Documentation/kernel-parameters.txt |
| @@ -1965,6 +1965,12 @@ bytes respectively. Such letter suffixes |
| 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. |
| |
