linux-kernel - Re: [PATCH V2] perf/x86: Add Intel Tiger Lake uncore support

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Date:   Fri, 7 Feb 2020 10:45:34 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     kan.liang@...ux.intel.com
Cc:     mingo@...hat.com, linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        andriy.shevchenko@...el.com
Subject: Re: [PATCH V2] perf/x86: Add Intel Tiger Lake uncore support

On Thu, Feb 06, 2020 at 08:15:27AM -0800, kan.liang@...ux.intel.com wrote:
> From: Kan Liang <kan.liang@...ux.intel.com>
> 
> For MSR type of uncore units, there is no difference between Ice Lake
> and Tiger Lake. Share the same code with Ice Lake.
> 
> Tiger Lake has two MCs. Both of them are located at 0:0:0. The BAR
> offset is still 0x48. The offset of the two MCs is 0x10000.
> Each MC has three counters to count every read/write/total issued by the
> Memory Controller to DRAM. The counters can be accessed by MMIO.
> They are free-running counters.
> 
> The offset of counters are different for TIGERLAKE_L and TIGERLAKE.
> Add separated mmio_init() functions.
> 
> Reviewed-by: Andi Kleen <ak@...ux.intel.com>
> Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>

Thanks!