* [PATCH stable-4.9] Documentation: Document arm64 kpti control
@ 2020-01-28 1:54 Florian Fainelli
2020-01-28 8:05 ` Greg KH
0 siblings, 1 reply; 2+ messages in thread
From: Florian Fainelli @ 2020-01-28 1:54 UTC (permalink / raw)
To: linux-vger
Cc: stable, jeremy.linton, gregkh, sashal, Jonathan Corbet,
Florian Fainelli, open list:DOCUMENTATION, open list
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>
---
Documentation/kernel-parameters.txt | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 1bc12619bedd..b2d2f4539a3f 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -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.
--
2.17.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH stable-4.9] Documentation: Document arm64 kpti control
2020-01-28 1:54 [PATCH stable-4.9] Documentation: Document arm64 kpti control Florian Fainelli
@ 2020-01-28 8:05 ` Greg KH
0 siblings, 0 replies; 2+ messages in thread
From: Greg KH @ 2020-01-28 8:05 UTC (permalink / raw)
To: Florian Fainelli
Cc: stable, jeremy.linton, sashal, Jonathan Corbet,
open list:DOCUMENTATION, open list
On Mon, Jan 27, 2020 at 05:54:14PM -0800, Florian Fainelli wrote:
> 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>
Thanks for the backport, now applied.
greg k-h
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