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Subject[PATCHv2 11/12] arm64: enable pointer authentication
Now that all the necessary bits are in place for userspace / KVM guest
pointer authentication, add the necessary Kconfig logic to allow this to
be enabled.

Cc: Catalin Marinas <>
Cc: Will Deacon <>
arch/arm64/Kconfig | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index a93339f5178f..f7cb4ca8a6fc 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1013,6 +1013,29 @@ config ARM64_PMEM


+menu "ARMv8.3 architectural features"
+ bool "Enable support for pointer authentication"
+ default y
+ help
+ Pointer authentication (part of the ARMv8.3 Extensions) provides
+ instructions for signing and authenticating pointers against secret
+ keys, which can be used to mitigate Return Oriented Programming (ROP)
+ and other attacks.
+ This option enables these instructions at EL0 (i.e. for userspace).
+ Choosing this option will cause the kernel to initialise secret keys
+ for each process at exec() time, with these keys being
+ context-switched along with the process.
+ The feature is detected at runtime. If the feature is not present in
+ hardware it will not be advertised to userspace nor will it be
+ enabled.
config ARM64_SVE
bool "ARM Scalable Vector Extension support"
default y
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