KVM: arm64: Allow ARM64_PTR_AUTH when ARM64_VHE=n (dfb0589c) · Commits · 戴 / test

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:

Andrew Scull <ascull@google.com> Acked-by:

Mark Rutland <mark.rutland@arm.com> Signed-off-by:

Marc Zyngier <maz@kernel.org>

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

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