On 07-08-24, 12:51, Marc Zyngier wrote: > 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 <viresh.kumar@xxxxxxxxxx> > Suggested-by: Arnd Bergmann <arnd@xxxxxxxxxx> > Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx> > --- > 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 Tested-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx> (Build only). -- viresh