linux-kernel - Re: [PATCH V5] perf: Add PERF_SAMPLE_PHYS

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Message-ID: <20170822173104.GY28715@tassilo.jf.intel.com>
Date:   Tue, 22 Aug 2017 10:31:04 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     kan.liang@...el.com, mingo@...hat.com,
        linux-kernel@...r.kernel.org, acme@...nel.org, jolsa@...hat.com,
        tglx@...utronix.de, eranian@...gle.com
Subject: Re: [PATCH V5] perf: Add PERF_SAMPLE_PHYS_ADDR

> Is this in any way x86 specific? AFAICT this should work in generic code
> as long as data->addr is provided.

It won't work on architectures that split the address space for user/kernel
(if TASK_SIZE is meaningless). But perhaps some generic config for that would
work.

-Andi