Commit dfb0589c authored by Marc Zyngier's avatar Marc Zyngier
Browse files

KVM: arm64: Allow ARM64_PTR_AUTH when ARM64_VHE=n 



We currently prevent PtrAuth from even being built if KVM is selected,
but VHE isn't. It is a bit of a pointless restriction, since we also
check this at run time (rejecting the enabling of PtrAuth for the
vcpu if we're not running with VHE).

Just drop this apparently useless restriction.

Acked-by: default avatarAndrew Scull <ascull@google.com>
Acked-by: default avatarMark Rutland <mark.rutland@arm.com>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
parent 4a95a1b2

arch/arm64/Kconfig

+1 −3
Original line number Diff line number Diff line
@@ -1516,7 +1516,6 @@ menu "ARMv8.3 architectural features" 
config ARM64_PTR_AUTH

	bool "Enable support for pointer authentication"

	default y

	depends on !KVM || ARM64_VHE

	depends on (CC_HAS_SIGN_RETURN_ADDRESS || CC_HAS_BRANCH_PROT_PAC_RET) && AS_HAS_PAC

	# GCC 9.1 and later inserts a .note.gnu.property section note for PAC

	# which is only understood by binutils starting with version 2.33.1.
@@ -1543,8 +1542,7 @@ config ARM64_PTR_AUTH 


	  The feature is detected at runtime. If the feature is not present in

	  hardware it will not be advertised to userspace/KVM guest nor will it

	  be enabled. However, KVM guest also require VHE mode and hence

	  CONFIG_ARM64_VHE=y option to use this feature.

	  be enabled.



	  If the feature is present on the boot CPU but not on a late CPU, then

	  the late CPU will be parked. Also, if the boot CPU does not have