From: Ian Rogers <irogers@google.com>
Date: Wed, 12 Nov 2025 19:53:10 +0000 (-0800)
Subject: perf test: Don't fail if user rdpmc returns 0 when disabled
X-Git-Tag: v6.19-rc1~61^2~106
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=efee18981aeebc14d6fa06f7556a6df1bd1acf92;p=thirdparty%2Flinux.git

perf test: Don't fail if user rdpmc returns 0 when disabled

In certain hypervisor set ups the value 0 may be returned but this is
only erroneous if the user rdpmc isn't disabled.

Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---

diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
index 3c89d30018874..3313c236104ee 100644
--- a/tools/perf/tests/mmap-basic.c
+++ b/tools/perf/tests/mmap-basic.c
@@ -322,7 +322,7 @@ static int test_stat_user_read(u64 event, enum user_read_state enabled)
 		}
 
 		perf_evsel__read(evsel, 0, 0, &counts);
-		if (counts.val == 0) {
+		if (rdpmc_supported && counts.val == 0) {
 			pr_err("User space counter reading for PMU %s [Failed read]\n", pmu->name);
 			ret = TEST_FAIL;
 			goto cleanup;