linux-kernel - [PATCH v2 5/5] perf tools: Support PERF_CONTEXT_GUEST

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Message-ID: <SY4P282MB108462B1895A79A8920DD6849DCFA@SY4P282MB1084.AUSP282.PROD.OUTLOOK.COM>
Date:   Sun,  8 Oct 2023 22:57:29 +0800
From:   Tianyi Liu <i.pear@...look.com>
To:     seanjc@...gle.com, pbonzini@...hat.com, peterz@...radead.org,
        mingo@...hat.com, acme@...nel.org
Cc:     linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        kvm@...r.kernel.org, x86@...nel.org, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
        namhyung@...nel.org, irogers@...gle.com, adrian.hunter@...el.com,
        Tianyi Liu <i.pear@...look.com>
Subject: [PATCH v2 5/5] perf tools: Support PERF_CONTEXT_GUEST_* flags

The `perf` util currently has a incomplete implementation for the
following event flags, that events with these flags will be dropped or
be identified as unknown types:

`PERF_CONTEXT_GUEST_KERNEL`
`PERF_CONTEXT_GUEST_USER`

This patch makes `perf script`, `perf timechart` and `perf data`
to correctly identify these flags.

Signed-off-by: Tianyi Liu <i.pear@...look.com>
---
 tools/perf/builtin-timechart.c      | 6 ++++++
 tools/perf/util/data-convert-json.c | 6 ++++++
 tools/perf/util/machine.c           | 6 ++++++
 3 files changed, 18 insertions(+)

diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index 19d4542ea..6a368b6a3 100644
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -536,6 +536,12 @@ static const char *cat_backtrace(union perf_event *event,
 			case PERF_CONTEXT_USER:
 				cpumode = PERF_RECORD_MISC_USER;
 				break;
+			case PERF_CONTEXT_GUEST_KERNEL:
+				cpumode = PERF_RECORD_MISC_GUEST_KERNEL;
+				break;
+			case PERF_CONTEXT_GUEST_USER:
+				cpumode = PERF_RECORD_MISC_GUEST_USER;
+				break;
 			default:
 				pr_debug("invalid callchain context: "
 					 "%"PRId64"\n", (s64) ip);
diff --git a/tools/perf/util/data-convert-json.c b/tools/perf/util/data-convert-json.c
index 5bb3c2ba9..62686f78d 100644
--- a/tools/perf/util/data-convert-json.c
+++ b/tools/perf/util/data-convert-json.c
@@ -205,6 +205,12 @@ static int process_sample_event(struct perf_tool *tool,
 				case PERF_CONTEXT_USER:
 					cpumode = PERF_RECORD_MISC_USER;
 					break;
+				case PERF_CONTEXT_GUEST_KERNEL:
+					cpumode = PERF_RECORD_MISC_GUEST_KERNEL;
+					break;
+				case PERF_CONTEXT_GUEST_USER:
+					cpumode = PERF_RECORD_MISC_GUEST_USER;
+					break;
 				default:
 					pr_debug("invalid callchain context: %"
 							PRId64 "\n", (s64) ip);
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 88f31b3a6..d88458c3b 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -2346,6 +2346,12 @@ static int add_callchain_ip(struct thread *thread,
 			case PERF_CONTEXT_USER:
 				*cpumode = PERF_RECORD_MISC_USER;
 				break;
+			case PERF_CONTEXT_GUEST_KERNEL:
+				*cpumode = PERF_RECORD_MISC_GUEST_KERNEL;
+				break;
+			case PERF_CONTEXT_GUEST_USER:
+				*cpumode = PERF_RECORD_MISC_GUEST_USER;
+				break;
 			default:
 				pr_debug("invalid callchain context: "
 					 "%"PRId64"\n", (s64) ip);
-- 
2.42.0