diff --git a/arch/arm64/kvm/arch_timer.c b/arch/arm64/kvm/arch_timer.c index 6ac3321f4c57..a45845f4ae4e 100644 --- a/arch/arm64/kvm/arch_timer.c +++ b/arch/arm64/kvm/arch_timer.c @@ -1110,8 +1110,7 @@ void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu) timer_context_init(vcpu, i); /* Synchronize offsets across timers of a VM if not already provided */ - if (!vcpu_is_protected(vcpu) && - !test_bit(KVM_ARCH_FLAG_VM_COUNTER_OFFSET, &vcpu->kvm->arch.flags)) { + if (!test_bit(KVM_ARCH_FLAG_VM_COUNTER_OFFSET, &vcpu->kvm->arch.flags)) { timer_set_offset(vcpu_vtimer(vcpu), kvm_phys_timer_read()); timer_set_offset(vcpu_ptimer(vcpu), 0); } @@ -1133,6 +1132,15 @@ void kvm_timer_init_vm(struct kvm *kvm) */ for (int i = 0; i < NR_KVM_TIMERS; i++) kvm->arch.timer_data.ppi[i] = get_vgic_ppi(kvm, default_ppi[i]); + + /* + * Protected VMs don't allow the userspace to set counter offsets, + * either set via counter register writes or the dedicated ioctls. + * Pretend the offset has already been set and rely on the default + * offset being 0. + */ + if (kvm_vm_is_protected(kvm)) + set_bit(KVM_ARCH_FLAG_VM_COUNTER_OFFSET, &kvm->arch.flags); } void kvm_timer_cpu_up(void)