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Documentation: Document arm64 kpti control

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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>
This commit is contained in:
Jeremy Linton
2019-01-25 12:07:00 -06:00
committed by Jonathan Corbet
parent 0c5e194947
commit de19055564
1 changed files with 6 additions and 0 deletions
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6
Documentation/admin-guide/kernel-parameters.txt
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@@ -1983,6 +1983,12 @@
Built with CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF=y, Built with CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF=y,
the default is off. the default is off.
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
kvm.ignore_msrs=[KVM] Ignore guest accesses to unhandled MSRs. kvm.ignore_msrs=[KVM] Ignore guest accesses to unhandled MSRs.
Default is 0 (don't ignore, but inject #GP) Default is 0 (don't ignore, but inject #GP)