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perf intel-pt: Fix aux_watermark calculation for 64-bit size

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BugLink: https://bugs.launchpad.net/bugs/2083196

[ Upstream commit 36b4cd990a8fd3f5b748883050e9d8c69fe6398d ]

aux_watermark is a u32. For a 64-bit size, cap the aux_watermark
calculation at UINT_MAX instead of truncating it to 32-bits.

Fixes: 874fc35cdd ("perf intel-pt: Use aux_watermark")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20240625104532.11990-2-adrian.hunter@intel.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Portia Stephens <portia.stephens@canonical.com>
Signed-off-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>
This commit is contained in:
Adrian Hunter
2024-06-25 13:45:31 +03:00
committed by Mehmet Basaran
parent 08e2b246b2
commit 94f05515fb
1 changed files with 2 additions and 1 deletions
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tools/perf/arch/x86/util/intel-pt.c
+2 -1
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@@ -758,7 +758,8 @@ static int intel_pt_recording_options(struct auxtrace_record *itr,
}
if (!opts->auxtrace_snapshot_mode && !opts->auxtrace_sample_mode) {
u32 aux_watermark = opts->auxtrace_mmap_pages * page_size / 4;
size_t aw = opts->auxtrace_mmap_pages * (size_t)page_size / 4;
u32 aux_watermark = aw > UINT_MAX ? UINT_MAX : aw;
intel_pt_evsel->core.attr.aux_watermark = aux_watermark;
}