linux-kernel - Re: [PATCH v11 08/11] KVM: x86/pmu: Emulate LBR feature via guest LBR event

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Message-ID: <20200519110104.GH279861@hirez.programming.kicks-ass.net>
Date:   Tue, 19 May 2020 13:01:04 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Like Xu <like.xu@...ux.intel.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Thomas Gleixner <tglx@...utronix.de>, ak@...ux.intel.com,
        wei.w.wang@...el.com
Subject: Re: [PATCH v11 08/11] KVM: x86/pmu: Emulate LBR feature via guest
 LBR event

On Thu, May 14, 2020 at 04:30:51PM +0800, Like Xu wrote:

> +	struct perf_event_attr attr = {
> +		.type = PERF_TYPE_RAW,
> +		.size = sizeof(attr),
> +		.pinned = true,
> +		.exclude_host = true,
> +		.config = INTEL_FIXED_VLBR_EVENT,
> +		.sample_type = PERF_SAMPLE_BRANCH_STACK,
> +		.branch_sample_type = PERF_SAMPLE_BRANCH_CALL_STACK |
> +					PERF_SAMPLE_BRANCH_USER,

Maybe order the fields according to how they're declared in the
structure?

> +	};