linux-kernel - Re: [PATCH 2/3] perf/x86/intel: Add more Icelake CPUIDs

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Message-ID: <20190603163044.GC3402@hirez.programming.kicks-ass.net>
Date:   Mon, 3 Jun 2019 18:30:44 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     "Liang, Kan" <kan.liang@...ux.intel.com>
Cc:     mingo@...hat.com, bp@...en8.de, tglx@...utronix.de,
        linux-kernel@...r.kernel.org, x86@...nel.org, qiuxu.zhuo@...el.com,
        tony.luck@...el.com, rui.zhang@...el.com
Subject: Re: [PATCH 2/3] perf/x86/intel: Add more Icelake CPUIDs

On Mon, Jun 03, 2019 at 12:14:49PM -0400, Liang, Kan wrote:
> 
> 
> On 6/3/2019 11:47 AM, Peter Zijlstra wrote:
> > On Mon, Jun 03, 2019 at 06:41:21AM -0700, kan.liang@...ux.intel.com wrote:
> > > @@ -4962,7 +4965,9 @@ __init int intel_pmu_init(void)
> > >   		x86_pmu.cpu_events = get_icl_events_attrs();
> > >   		x86_pmu.rtm_abort_event = X86_CONFIG(.event=0xca, .umask=0x02);
> > >   		x86_pmu.lbr_pt_coexist = true;
> > > -		intel_pmu_pebs_data_source_skl(false);
> > > +		intel_pmu_pebs_data_source_skl(
> > > +			(boot_cpu_data.x86_model == INTEL_FAM6_ICELAKE_X) ||
> > > +			(boot_cpu_data.x86_model == INTEL_FAM6_ICELAKE_XEON_D));
> > 
> > That's pretty sad, a model switch inside a model switch :/
> > 
> > >   		pr_cont("Icelake events, ");
> > >   		name = "icelake";
> > >   		break;
> > 
> > Would something like so not be nicer?
> 
> Yes, it looks better. Thanks.
> 
> Should I combine your patch with mine, and send out V2?
> Or are you prefer to add your patch on top of this patch set?

I'll frob it. Thanks!