linux-kernel - Re: [PATCH 2/2] perf/x86/intel/pt: Allow disabling branch tracing

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Date:   Thu, 02 Feb 2017 12:14:14 +0200
From:   Alexander Shishkin <alexander.shishkin@...ux.intel.com>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        vince@...ter.net, eranian@...gle.com,
        Arnaldo Carvalho de Melo <acme@...radead.org>,
        Borislav Petkov <bp@...e.de>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 2/2] perf/x86/intel/pt: Allow disabling branch tracing

Alexander Shishkin <alexander.shishkin@...ux.intel.com> writes:

> @@ -72,12 +77,14 @@ static struct pt_cap_desc {
>  	PT_CAP(mtc_periods,		1, CPUID_EAX, 0xffff0000),
>  	PT_CAP(cycle_thresholds,	1, CPUID_EBX, 0xffff),
>  	PT_CAP(psb_periods,		1, CPUID_EBX, 0xffff0000),
> +	PT_CAP(passthrough,		PT_SW_CAP, 0, 1),

Thinking some more: we don't actually need this as the format string
already serves this purpose.

Regards,
--
Alex