Re: [PATCH v5 03/12] KVM/x86: KVM_CAP_X86_GUEST_LBR
From: Andi Kleen
Date: Thu Feb 14 2019 - 11:21:57 EST
> + case KVM_CAP_X86_GUEST_LBR:
> + r = -EINVAL;
> + if (cap->args[0] &&
> + x86_perf_get_lbr_stack(&kvm->arch.lbr_stack)) {
> + pr_err("Failed to enable the guest lbr feature\n");
Remove the pr_err. We don't want unprivileged users trigger unlimited
kernel printk.