From 10f2ad032defe906240d0c3b62dcbceace96b230 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Wed, 7 Aug 2024 12:51:44 +0100 Subject: [PATCH] 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: 5d476ca57d7d ("KVM: arm64: nv: Add handling of range-based TLBI operations") Reported-by: Viresh Kumar Suggested-by: Arnd Bergmann Signed-off-by: Marc Zyngier Acked-by: Arnd Bergmann Link: https://lore.kernel.org/r/20240807115144.3237260-1-maz@kernel.org Signed-off-by: Oliver Upton --- arch/arm64/kvm/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig index 58f09370d17e..8304eb342be9 100644 --- a/arch/arm64/kvm/Kconfig +++ b/arch/arm64/kvm/Kconfig @@ -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 -- 2.50.1