adb97f18b4
[ Upstream commit d9c5c083416500e95da098c01be092b937def7fa ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
36 lines
754 B
C
36 lines
754 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _PERF_XYARRAY_H_
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#define _PERF_XYARRAY_H_ 1
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#include <linux/compiler.h>
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#include <sys/types.h>
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struct xyarray {
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size_t row_size;
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size_t entry_size;
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size_t entries;
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size_t max_x;
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size_t max_y;
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char contents[] __aligned(8);
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};
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struct xyarray *xyarray__new(int xlen, int ylen, size_t entry_size);
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void xyarray__delete(struct xyarray *xy);
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void xyarray__reset(struct xyarray *xy);
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static inline void *xyarray__entry(struct xyarray *xy, int x, int y)
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{
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return &xy->contents[x * xy->row_size + y * xy->entry_size];
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}
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static inline int xyarray__max_y(struct xyarray *xy)
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{
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return xy->max_y;
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}
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static inline int xyarray__max_x(struct xyarray *xy)
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{
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return xy->max_x;
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}
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#endif /* _PERF_XYARRAY_H_ */
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