Commit 10f2ad03 authored by Marc Zyngier's avatar Marc Zyngier Committed by Oliver Upton
Browse files

KVM: arm64: Enforce dependency on an ARMv8.4-aware toolchain 



With the NV support of TLBI-range operations, KVM makes use of
instructions that are only supported by binutils versions >= 2.30.

This breaks the build for very old toolchains.

Make KVM support conditional on having ARMv8.4 support in the
assembler, side-stepping the issue.

Fixes: 5d476ca5 ("KVM: arm64: nv: Add handling of range-based TLBI operations")
Reported-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Suggested-by: default avatarArnd Bergmann <arnd@linaro.org>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20240807115144.3237260-1-maz@kernel.org


Signed-off-by: default avatarOliver Upton <oliver.upton@linux.dev>
parent 7fef1eb0

arch/arm64/kvm/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ if VIRTUALIZATION 


menuconfig KVM

	bool "Kernel-based Virtual Machine (KVM) support"

	depends on AS_HAS_ARMV8_4

	select KVM_COMMON

	select KVM_GENERIC_HARDWARE_ENABLING

	select KVM_GENERIC_MMU_NOTIFIER