From ce5b4191e865fe85cbbb9cf4913424d19e6bcc86 Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Fri, 17 Oct 2025 16:19:51 +0200
Subject: [PATCH] 6.6-stable patches

added patches:
	perf-test-stat-avoid-hybrid-assumption-when-virtualized.patch
---
 ...d-hybrid-assumption-when-virtualized.patch | 45 +++++++++++++++++++
 queue-6.6/series                              |  1 +
 2 files changed, 46 insertions(+)
 create mode 100644 queue-6.6/perf-test-stat-avoid-hybrid-assumption-when-virtualized.patch

diff --git a/queue-6.6/perf-test-stat-avoid-hybrid-assumption-when-virtualized.patch b/queue-6.6/perf-test-stat-avoid-hybrid-assumption-when-virtualized.patch
new file mode 100644
index 0000000000..55d60dc2a5
--- /dev/null
+++ b/queue-6.6/perf-test-stat-avoid-hybrid-assumption-when-virtualized.patch
@@ -0,0 +1,45 @@
+From f9c506fb69bdcfb9d7138281378129ff037f2aa1 Mon Sep 17 00:00:00 2001
+From: Ian Rogers <irogers@google.com>
+Date: Thu, 12 Dec 2024 09:33:54 -0800
+Subject: perf test stat: Avoid hybrid assumption when virtualized
+
+From: Ian Rogers <irogers@google.com>
+
+commit f9c506fb69bdcfb9d7138281378129ff037f2aa1 upstream.
+
+The cycles event will fallback to task-clock in the hybrid test when
+running virtualized. Change the test to not fail for this.
+
+Fixes: 65d11821910bd910 ("perf test: Add a test for default perf stat command")
+Reviewed-by: James Clark <james.clark@linaro.org>
+Signed-off-by: Ian Rogers <irogers@google.com>
+Acked-by: Namhyung Kim <namhyung@kernel.org>
+Cc: Adrian Hunter <adrian.hunter@intel.com>
+Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
+Cc: Ingo Molnar <mingo@redhat.com>
+Cc: Jiri Olsa <jolsa@kernel.org>
+Cc: Kan Liang <kan.liang@linux.intel.com>
+Cc: Mark Rutland <mark.rutland@arm.com>
+Cc: Peter Zijlstra <peterz@infradead.org>
+Link: https://lore.kernel.org/r/20241212173354.9860-1-irogers@google.com
+Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ tools/perf/tests/shell/stat.sh |    6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+--- a/tools/perf/tests/shell/stat.sh
++++ b/tools/perf/tests/shell/stat.sh
+@@ -161,7 +161,11 @@ test_hybrid() {
+   # Run default Perf stat
+   cycles_events=$(perf stat -- true 2>&1 | grep -E "/cycles/[uH]*|  cycles[:uH]*  " -c)
+ 
+-  if [ "$pmus" -ne "$cycles_events" ]
++  # The expectation is that default output will have a cycles events on each
++  # hybrid PMU. In situations with no cycles PMU events, like virtualized, this
++  # can fall back to task-clock and so the end count may be 0. Fail if neither
++  # condition holds.
++  if [ "$pmus" -ne "$cycles_events" ] && [ "0" -ne "$cycles_events" ]
+   then
+     echo "hybrid test [Found $pmus PMUs but $cycles_events cycles events. Failed]"
+     err=1
diff --git a/queue-6.6/series b/queue-6.6/series
index dfc2ca96c8..558737643a 100644
--- a/queue-6.6/series
+++ b/queue-6.6/series
@@ -198,3 +198,4 @@ fs-add-initramfs_options-to-set-initramfs-mount-opti.patch
 cramfs-verify-inode-mode-when-loading-from-disk.patch
 writeback-avoid-softlockup-when-switching-many-inode.patch
 writeback-avoid-excessively-long-inode-switching-tim.patch
+perf-test-stat-avoid-hybrid-assumption-when-virtualized.patch
-- 
2.47.3