linux-kernel - [PATCH 4/6] perf script: Add guest

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Date:   Fri, 13 May 2022 12:02:35 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>, Leo Yan <leo.yan@...aro.org>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        kvm@...r.kernel.org
Subject: [PATCH 4/6] perf script: Add guest_code support

Add an option to indicate that guest code can be found in the hypervisor
process.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
 tools/perf/Documentation/perf-script.txt | 4 ++++
 tools/perf/builtin-script.c              | 5 ++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index 2012a8e6c90b..1a557ff8f210 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -499,6 +499,10 @@ include::itrace.txt[]
 	The known limitations include exception handing such as
 	setjmp/longjmp will have calls/returns not match.
 
+--guest-code::
+	Indicate that guest code can be found in the hypervisor process,
+	which is a common case for KVM test programs.
+
 SEE ALSO
 --------
 linkperf:perf-record[1], linkperf:perf-script-perl[1],
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index cf5eab5431b4..96a2106a3dac 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -3884,6 +3884,8 @@ int cmd_script(int argc, const char **argv)
 		   "file", "file saving guest os /proc/kallsyms"),
 	OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
 		   "file", "file saving guest os /proc/modules"),
+	OPT_BOOLEAN(0, "guest-code", &symbol_conf.guest_code,
+		    "Guest code can be found in hypervisor process"),
 	OPT_BOOLEAN('\0', "stitch-lbr", &script.stitch_lbr,
 		    "Enable LBR callgraph stitching approach"),
 	OPTS_EVSWITCH(&script.evswitch),
@@ -3909,7 +3911,8 @@ int cmd_script(int argc, const char **argv)
 	if (symbol_conf.guestmount ||
 	    symbol_conf.default_guest_vmlinux_name ||
 	    symbol_conf.default_guest_kallsyms ||
-	    symbol_conf.default_guest_modules) {
+	    symbol_conf.default_guest_modules ||
+	    symbol_conf.guest_code) {
 		/*
 		 * Enable guest sample processing.
 		 */
-- 
2.25.1