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perf kvm: Add pointer to 'perf_kvm_stat' in kvm event 

Sometimes, handling kvm events needs to base on global variables, e.g.
when read event counts we need to know the target vcpu ID; the global
variables are stored in structure perf_kvm_stat.

This patch adds add a 'perf_kvm_stat' pointer in kvm event structure,
it is to be used by later refactoring.

Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230315145112.186603-2-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Leo Yan 2023-03-15 22:50:58 +08:00 committed by Arnaldo Carvalho de Melo
parent 9c3aa1f411
commit a7d451a873
2 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
tools/perf/builtin-kvm.c
View File

@ -209,7 +209,8 @@ static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
return true;
}
static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
static struct kvm_event *kvm_alloc_init_event(struct perf_kvm_stat *kvm,
struct event_key *key)
{
struct kvm_event *event;
@ -219,6 +220,7 @@ static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
return NULL;
}
event->perf_kvm = kvm;
event->key = *key;
init_stats(&event->total.stats);
return event;
@ -238,7 +240,7 @@ static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
return event;
}
event = kvm_alloc_init_event(key);
event = kvm_alloc_init_event(kvm, key);
if (!event)
return NULL;

5
tools/perf/util/kvm-stat.h
View File

@ -24,10 +24,13 @@ struct kvm_event_stats {
struct stats stats;
};
struct perf_kvm_stat;
struct kvm_event {
struct list_head hash_entry;
struct rb_node rb;
struct perf_kvm_stat *perf_kvm;
struct event_key key;
struct kvm_event_stats total;
@ -44,8 +47,6 @@ struct kvm_event_key {
key_cmp_fun key;
};
struct perf_kvm_stat;
struct child_event_ops {
void (*get_key)(struct evsel *evsel,
struct perf_sample *sample,