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authorStephane Eranian <eranian@google.com>2020-10-01 06:57:49 -0700
committerPeter Zijlstra <peterz@infradead.org>2020-10-29 11:00:39 +0100
commit995f088efebe1eba0282a6ffa12411b37f8990c2 (patch)
tree9e3185b05657e50aa991790dde6d74ba4dd8ee02 /include/linux/perf_event.h
parentpowerpc/perf: Support PERF_SAMPLE_DATA_PAGE_SIZE (diff)
downloadlinux-dev-995f088efebe1eba0282a6ffa12411b37f8990c2.tar.xz
linux-dev-995f088efebe1eba0282a6ffa12411b37f8990c2.zip
perf/core: Add support for PERF_SAMPLE_CODE_PAGE_SIZE
When studying code layout, it is useful to capture the page size of the sampled code address. Add a new sample type for code page size. The new sample type requires collecting the ip. The code page size can be calculated from the NMI-safe perf_get_page_size(). For large PEBS, it's very unlikely that the mapping is gone for the earlier PEBS records. Enable the feature for the large PEBS. The worst case is that page-size '0' is returned. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20201001135749.2804-5-kan.liang@linux.intel.com
Diffstat (limited to 'include/linux/perf_event.h')
-rw-r--r--include/linux/perf_event.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 7e3785dd27d9..e533b03af053 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -1035,6 +1035,7 @@ struct perf_sample_data {
u64 phys_addr;
u64 cgroup;
u64 data_page_size;
+ u64 code_page_size;
} ____cacheline_aligned;
/* default value for data source */