From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ingo Molnar <mingo@kernel.org>, Thomas Gleixner <tglx@linutronix.de>
Cc: Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
Clark Williams <williams@redhat.com>,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
Gerald BAEZA <gerald.baeza@st.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Alexandre Torgue <alexandre.torgue@st.com>,
Andi Kleen <ak@linux.intel.com>, Jiri Olsa <jolsa@redhat.com>,
Mathieu Poirier <mathieu.poirier@linaro.org>,
Peter Zijlstra <peterz@infradead.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: [PATCH 25/25] libperf: Fix alignment trap with xyarray contents in 'perf stat'
Date: Thu, 22 Aug 2019 18:01:00 -0300 [thread overview]
Message-ID: <20190822210100.3461-26-acme@kernel.org> (raw)
In-Reply-To: <20190822210100.3461-1-acme@kernel.org>
From: Gerald BAEZA <gerald.baeza@st.com>
Following the patch 'perf stat: Fix --no-scale', an alignment trap
happens in process_counter_values() on ARMv7 platforms due to the
attempt to copy non 64 bits aligned double words (pointed by 'count')
via a NEON vectored instruction ('vld1' with 64 bits alignment
constraint).
This patch sets a 64 bits alignment constraint on 'contents[]' field in
'struct xyarray' since the 'count' pointer used above points to such a
structure.
Signed-off-by: Gerald Baeza <gerald.baeza@st.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1566464769-16374-1-git-send-email-gerald.baeza@st.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/include/internal/xyarray.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/perf/lib/include/internal/xyarray.h b/tools/perf/lib/include/internal/xyarray.h
index 3bf70e4d474c..51e35d6c8ec4 100644
--- a/tools/perf/lib/include/internal/xyarray.h
+++ b/tools/perf/lib/include/internal/xyarray.h
@@ -2,6 +2,7 @@
#ifndef __LIBPERF_INTERNAL_XYARRAY_H
#define __LIBPERF_INTERNAL_XYARRAY_H
+#include <linux/compiler.h>
#include <sys/types.h>
struct xyarray {
@@ -10,7 +11,7 @@ struct xyarray {
size_t entries;
size_t max_x;
size_t max_y;
- char contents[];
+ char contents[] __aligned(8);
};
struct xyarray *xyarray__new(int xlen, int ylen, size_t entry_size);
--
2.21.0
next prev parent reply other threads:[~2019-08-22 21:03 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-22 21:00 [GIT PULL] perf/core improvements and fixes Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 01/25] tools headers: Add missing perf_event.h include Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 02/25] perf tools: Use perf_cpu_map__nr instead of cpu_map__nr Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 03/25] libperf: Move perf's cpu_map__empty() to perf_cpu_map__empty() Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 04/25] libperf: Move perf's cpu_map__idx() to perf_cpu_map__idx() Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 05/25] perf arm64: Add missing debug.h header Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 06/25] perf kvm s390: Add missing string.h header Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 07/25] perf metricgroup: Remove needless includes from metricgroup.h Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 08/25] perf evsel: Move xyarray.h from evsel.c to evsel.h to reduce include dep tree Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 09/25] perf counts: Add missing headers needed for types used Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 10/25] perf bpf: Add missing xyarray.h header Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 11/25] perf evlist: " Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 12/25] perf script: Add missing counts.h Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 13/25] perf tests: " Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 14/25] perf stat: " Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 15/25] perf scripting python: Add missing counts.h header Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 16/25] perf evsel: Add missing perf/evsel.h header in util/evsel.h Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 17/25] perf evsel: Remove needless counts.h header from util/evsel.h Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 18/25] perf evsel: Remove needless stddef.h " Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 19/25] perf evsel: util/evsel.h needs stdio.h as it uses FILE Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 20/25] perf x86 kvm-stat: Add missing string.h header Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 21/25] perf evsel: Switch to libperf's cpumap.h Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 22/25] perf cpumap: Remove needless includes from cpumap.h Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 23/25] libperf: Add perf_thread_map__nr/perf_thread_map__pid functions Arnaldo Carvalho de Melo
2019-08-22 21:00 ` [PATCH 24/25] perf c2c: Fix report with offline cpus Arnaldo Carvalho de Melo
2019-08-22 21:01 ` Arnaldo Carvalho de Melo [this message]
2019-08-23 10:30 ` [GIT PULL] perf/core improvements and fixes Ingo Molnar
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