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From: Namhyung Kim <namhyung@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>,
	Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Andrii Nakryiko <andrii@kernel.org>,
	Song Liu <songliubraving@fb.com>
Cc: Ingo Molnar <mingo@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	Jiri Olsa <jolsa@kernel.org>, LKML <linux-kernel@vger.kernel.org>,
	Martin KaFai Lau <kafai@fb.com>, Yonghong Song <yhs@fb.com>,
	John Fastabend <john.fastabend@gmail.com>,
	KP Singh <kpsingh@kernel.org>, Hao Luo <haoluo@google.com>,
	Stanislav Fomichev <sdf@google.com>,
	bpf@vger.kernel.org, Kan Liang <kan.liang@linux.intel.com>,
	Ravi Bangoria <ravi.bangoria@amd.com>
Subject: [PATCH 3/3] perf: Kill __PERF_SAMPLE_CALLCHAIN_EARLY
Date: Thu,  8 Sep 2022 14:41:04 -0700	[thread overview]
Message-ID: <20220908214104.3851807-3-namhyung@kernel.org> (raw)
In-Reply-To: <20220908214104.3851807-1-namhyung@kernel.org>

There's no in-tree user anymore.  Let's get rid of it.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 arch/x86/events/amd/ibs.c       | 10 ----------
 arch/x86/events/intel/core.c    |  3 ---
 include/uapi/linux/perf_event.h |  2 --
 3 files changed, 15 deletions(-)

diff --git a/arch/x86/events/amd/ibs.c b/arch/x86/events/amd/ibs.c
index dab094166693..ce5720bfb350 100644
--- a/arch/x86/events/amd/ibs.c
+++ b/arch/x86/events/amd/ibs.c
@@ -300,16 +300,6 @@ static int perf_ibs_init(struct perf_event *event)
 	hwc->config_base = perf_ibs->msr;
 	hwc->config = config;
 
-	/*
-	 * rip recorded by IbsOpRip will not be consistent with rsp and rbp
-	 * recorded as part of interrupt regs. Thus we need to use rip from
-	 * interrupt regs while unwinding call stack. Setting _EARLY flag
-	 * makes sure we unwind call-stack before perf sample rip is set to
-	 * IbsOpRip.
-	 */
-	if (event->attr.sample_type & PERF_SAMPLE_CALLCHAIN)
-		event->attr.sample_type |= __PERF_SAMPLE_CALLCHAIN_EARLY;
-
 	return 0;
 }
 
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index ba101c28dcc9..fcd43878a24d 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -3846,9 +3846,6 @@ static int intel_pmu_hw_config(struct perf_event *event)
 		}
 		if (x86_pmu.pebs_aliases)
 			x86_pmu.pebs_aliases(event);
-
-		if (event->attr.sample_type & PERF_SAMPLE_CALLCHAIN)
-			event->attr.sample_type |= __PERF_SAMPLE_CALLCHAIN_EARLY;
 	}
 
 	if (needs_branch_stack(event)) {
diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index dca16582885f..e639c74cf5fb 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -164,8 +164,6 @@ enum perf_event_sample_format {
 	PERF_SAMPLE_WEIGHT_STRUCT		= 1U << 24,
 
 	PERF_SAMPLE_MAX = 1U << 25,		/* non-ABI */
-
-	__PERF_SAMPLE_CALLCHAIN_EARLY		= 1ULL << 63, /* non-ABI; internal use */
 };
 
 #define PERF_SAMPLE_WEIGHT_TYPE	(PERF_SAMPLE_WEIGHT | PERF_SAMPLE_WEIGHT_STRUCT)
-- 
2.37.2.789.g6183377224-goog


  parent reply	other threads:[~2022-09-08 21:41 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-08 21:41 [PATCH 1/3] perf: Use sample_flags for callchain Namhyung Kim
2022-09-08 21:41 ` [PATCH 2/3] perf/bpf: Always use perf callchains if exist Namhyung Kim
2022-09-09 21:55   ` sdf
2022-09-15 14:16   ` [tip: perf/core] " tip-bot2 for Namhyung Kim
2022-09-08 21:41 ` Namhyung Kim [this message]
2022-09-15 14:16   ` [tip: perf/core] perf: Kill __PERF_SAMPLE_CALLCHAIN_EARLY tip-bot2 for Namhyung Kim
2022-09-09 12:37 ` [PATCH 1/3] perf: Use sample_flags for callchain Liang, Kan
2022-09-15 14:16 ` [tip: perf/core] " tip-bot2 for Namhyung Kim

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