linux-kernel - Re: [PATCH v5 03/12] KVM/x86: KVM_CAP_X86_GUEST

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Message-ID: <20190214162150.GJ16922@tassilo.jf.intel.com>
Date:   Thu, 14 Feb 2019 08:21:50 -0800
From:   Andi Kleen <ak@...ux.intel.com>
To:     Wei Wang <wei.w.wang@...el.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        pbonzini@...hat.com, peterz@...radead.org, kan.liang@...el.com,
        mingo@...hat.com, rkrcmar@...hat.com, like.xu@...el.com,
        jannh@...gle.com, arei.gonglei@...wei.com, jmattson@...gle.com
Subject: Re: [PATCH v5 03/12] KVM/x86: KVM_CAP_X86_GUEST_LBR

> +	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.