linux-kernel - Re: [Patch v5 13/19] perf/x86: Enable SSP sampling using sample_regs

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Message-ID: <1fddf87c-ea08-4cde-8851-526c6e672927@linux.intel.com>
Date: Mon, 8 Dec 2025 14:21:36 +0800
From: "Mi, Dapeng" <dapeng1.mi@...ux.intel.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de Melo
 <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
 Thomas Gleixner <tglx@...utronix.de>,
 Dave Hansen <dave.hansen@...ux.intel.com>, Ian Rogers <irogers@...gle.com>,
 Adrian Hunter <adrian.hunter@...el.com>, Jiri Olsa <jolsa@...nel.org>,
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
 Andi Kleen <ak@...ux.intel.com>, Eranian Stephane <eranian@...gle.com>,
 Mark Rutland <mark.rutland@....com>, broonie@...nel.org,
 Ravi Bangoria <ravi.bangoria@....com>, linux-kernel@...r.kernel.org,
 linux-perf-users@...r.kernel.org, Zide Chen <zide.chen@...el.com>,
 Falcon Thomas <thomas.falcon@...el.com>, Dapeng Mi <dapeng1.mi@...el.com>,
 Xudong Hao <xudong.hao@...el.com>, Kan Liang <kan.liang@...ux.intel.com>
Subject: Re: [Patch v5 13/19] perf/x86: Enable SSP sampling using
 sample_regs_* fields


On 12/5/2025 8:20 PM, Peter Zijlstra wrote:
> On Wed, Dec 03, 2025 at 02:54:54PM +0800, Dapeng Mi wrote:
>> diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
>> index ca242db3720f..c925af4160ad 100644
>> --- a/arch/x86/include/asm/perf_event.h
>> +++ b/arch/x86/include/asm/perf_event.h
>> @@ -729,6 +729,10 @@ struct x86_perf_regs {
>>  		u64	*egpr_regs;
>>  		struct apx_state *egpr;
>>  	};
>> +	union {
>> +		u64	*cet_regs;
>> +		struct cet_user_state *cet;
>> +	};
>>  };
> Are we envisioning more than just SSP?

No idea about this, currently only SSP is supported. 


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