Re: [PATCH] KVM: arm64: Enforce dependency on an ARMv8.4-aware toolchain
From: Viresh Kumar <viresh.kumar@linaro.org>
Date: 2024-08-08 07:34:07
Also in:
kvm, kvmarm
On 07-08-24, 12:51, Marc Zyngier wrote:
quoted hunk ↗ jump to hunk
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@linaro.org> Suggested-by: Arnd Bergmann <redacted> Signed-off-by: Marc Zyngier <maz@kernel.org> --- 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@linaro.org> (Build only). -- viresh