linux-kernel - Re: [patch] events/amd/power add support for fam16h model30h

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Date:	Thu, 16 Jun 2016 23:12:18 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Vince Weaver <vincent.weaver@...ne.edu>,
	Huang Rui <ray.huang@....com>
Cc:	linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Subject: Re: [patch] events/amd/power add support for fam16h model30h

On Thu, Jun 16, 2016 at 05:00:04PM -0400, Vince Weaver wrote:
> 
> According to the BKDG the AMD Family16h Model30h "Jaguar Mullins"
> also supports the accumulated power interface.  I've tested on
> hardware I have and with this patch I indeed get power readings using 
> perf.
> 
> Signed-off-by: Vince Weaver <vincent.weaver@...ne.edu>
> 
> diff --git a/arch/x86/events/amd/power.c b/arch/x86/events/amd/power.c
> index 55a3529..778b77d 100644
> --- a/arch/x86/events/amd/power.c
> +++ b/arch/x86/events/amd/power.c
> @@ -292,6 +292,7 @@ static struct notifier_block power_cpu_notifier_nb = {
>  
>  static const struct x86_cpu_id cpu_match[] = {
>  	{ .vendor = X86_VENDOR_AMD, .family = 0x15 },
> +	{ .vendor = X86_VENDOR_AMD, .family = 0x16 },
>  	{},

Actually, I think we remove that table completely and rely solely on the
CPUID bit:

        if (!boot_cpu_has(X86_FEATURE_ACC_POWER))
                return -ENODEV;

Rui?

-- 
Regards/Gruss,
    Boris.

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