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Subject[PATCH v1] perf parse-events: Fix for term values that are raw events
From
Raw events can be strings like 'r0xead' but the 0x is optional so they
can also be 'read'. On IcelakeX uncore_imc_free_running has an event
called 'read' which may be programmed as:
```
$ perf stat -e 'uncore_imc_free_running/event=read/' -a sleep 1
```
However, the PE_RAW type isn't allowed on the right of a term, even
though in this case we just want to interpret it as a string. This
leads to the following error on IcelakeX:
```
$ perf stat -e 'uncore_imc_free_running/event=read/' -a sleep 1
event syntax error: '..nning/event=read/'
\___ parser error
Run 'perf list' for a list of valid events

Usage: perf stat [<options>] [<command>]

-e, --event <event> event selector. use 'perf list' to list available events
```
Fix this by allowing raw types on the right of terms and treat them as
strings, just as is already done for PE_LEGACY_CACHE. Make this
consistent by just entirely removing name_or_legacy and always using
name_or_raw that covers all three cases.

Fixes: 6fd1e5191591 ("perf parse-events: Support PMUs for legacy cache events")
Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/util/parse-events.y | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index 4d9f3922a33d..de098caf0c1c 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -78,7 +78,7 @@ static void free_list_evsel(struct list_head* list_evsel)
%type <str> PE_MODIFIER_BP
%type <str> PE_EVENT_NAME
%type <str> PE_DRV_CFG_TERM
-%type <str> name_or_raw name_or_legacy
+%type <str> name_or_raw
%destructor { free ($$); } <str>
%type <term> event_term
%destructor { parse_events_term__delete ($$); } <term>
@@ -669,8 +669,6 @@ event_term

name_or_raw: PE_RAW | PE_NAME | PE_LEGACY_CACHE

-name_or_legacy: PE_NAME | PE_LEGACY_CACHE
-
event_term:
PE_RAW
{
@@ -685,7 +683,7 @@ PE_RAW
$$ = term;
}
|
-name_or_raw '=' name_or_legacy
+name_or_raw '=' name_or_raw
{
struct parse_events_term *term;
int err = parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_USER, $1, $3, &@1, &@3);
@@ -765,7 +763,7 @@ PE_TERM_HW
$$ = term;
}
|
-PE_TERM '=' name_or_legacy
+PE_TERM '=' name_or_raw
{
struct parse_events_term *term;
int err = parse_events_term__str(&term, $1, /*config=*/NULL, $3, &@1, &@3);
--
2.42.0.515.g380fc7ccd1-goog
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