Hi all, just got KVM running on the Raspberry Pi4. Seems they now embedded all required logic into that new SoC. However, as the Raspberry kernel is not yet ready for 64-bit (and upstream is not in sight), I had to use legacy 32-bit mode. And there we stumble over the core detection. This little patch made it work, though: diff --git a/arch/arm/kvm/guest.c b/arch/arm/kvm/guest.c index 2b8de885b2bf..01606aad73cc 100644 --- a/arch/arm/kvm/guest.c +++ b/arch/arm/kvm/guest.c @@ -290,6 +290,7 @@ int __attribute_const__ kvm_target_cpu(void) case ARM_CPU_PART_CORTEX_A7: return KVM_ARM_TARGET_CORTEX_A7; case ARM_CPU_PART_CORTEX_A15: + case ARM_CPU_PART_CORTEX_A72: return KVM_ARM_TARGET_CORTEX_A15; default: return -EINVAL; That raises the question if this is hack or a valid change and if there is general interest in mapping 64-bit cores on 32-bit if they happen to run in 32-bit mode. Jan PS: The RPi device tree lacks description of the GICH maintenance interrupts. Seems KVM is fine without that - because it has the information hard-coded or because it can live without that interrupt?
