From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3530D2F12BD; Fri, 17 Oct 2025 15:05:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760713500; cv=none; b=Jh8tK5V531BESOtzRx3t4zzN9qAfs+7Nh/BO87VgE4nFmmsagpFWprb5Xtz9mhCM/PNGj9l6E+5FUXml8NCgi9wEfMhs5kbde6EODkQ6m1sCHH82DNwMzVd7CmA0tMLUXZd7aG41D+oqFVTr7jZ7p3ijB83pjKll6pP/8lRyi0g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760713500; c=relaxed/simple; bh=tqrevVX7iA+DogRMX55FuiIVYv1n92uzrPB6+NQw29k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=OQWAqSkMyyaLKtC5qzABQi4SRIZcIzWy0+P9PoJNyVFeQQGxh6HC8wW4K8B4F6CGaXoBXQ/c0yU8HdfXAS8fTA5ELZqptw2Bv4gSV7BSM5gR47dB0X3lj099B9bTR61ocbsN4eCTisCN1Kv1j/P8pKGzfEDc5MK2zuxAf98I8yY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=AfHosSAc; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="AfHosSAc" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 81819C4CEE7; Fri, 17 Oct 2025 15:04:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1760713500; bh=tqrevVX7iA+DogRMX55FuiIVYv1n92uzrPB6+NQw29k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AfHosSAc8TJqtlkgjzyF7hoUgRXFR3vp+o3Mz1RS7jAIQzpfeplPo4f0TkaBDxI5p SsHR5b7elxS2mMF+PbHg3r7KgyRm2vXp4HxdlW7B7GISWBwbESq2hud7dtE7h/ZEfH U6/l4/tEjBUQq/dxmO5abNbYWMmsRtE7aWvuuR04= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ian Rogers , James Clark , Ravi Bangoria , Kan Liang , James Clark , Atish Patra , Mingwei Zhang , Kajol Jain , Thomas Richter , Palmer Dabbelt , Namhyung Kim , Sasha Levin Subject: [PATCH 6.6 019/201] perf tools: Add fallback for exclude_guest Date: Fri, 17 Oct 2025 16:51:20 +0200 Message-ID: <20251017145135.443774685@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251017145134.710337454@linuxfoundation.org> References: <20251017145134.710337454@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Namhyung Kim [ Upstream commit bb6e7cb11d97ce1957894d30d13bfad3e8bfefe9 ] Commit 7b100989b4f6bce70 ("perf evlist: Remove __evlist__add_default") changed to parse "cycles:P" event instead of creating a new cycles event for perf record. But it also changed the way how modifiers are handled so it doesn't set the exclude_guest bit by default. It seems Apple M1 PMU requires exclude_guest set and returns EOPNOTSUPP if not. Let's add a fallback so that it can work with default events. Also update perf stat hybrid tests to handle possible u or H modifiers. Reviewed-by: Ian Rogers Reviewed-by: James Clark Reviewed-by: Ravi Bangoria Acked-by: Kan Liang Cc: James Clark Cc: Atish Patra Cc: Mingwei Zhang Cc: Kajol Jain Cc: Thomas Richter Cc: Palmer Dabbelt Link: https://lore.kernel.org/r/20241016062359.264929-2-namhyung@kernel.org Fixes: 7b100989b4f6bce70 ("perf evlist: Remove __evlist__add_default") Signed-off-by: Namhyung Kim Stable-dep-of: 24937ee839e4 ("perf evsel: Ensure the fallback message is always written to") Signed-off-by: Sasha Levin --- tools/perf/builtin-stat.c | 18 +++++++++++++++--- tools/perf/tests/shell/stat.sh | 2 +- tools/perf/util/evsel.c | 21 +++++++++++++++++++++ 3 files changed, 37 insertions(+), 4 deletions(-) diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 9692ebdd7f11e..1512fedd90cf9 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -638,8 +638,7 @@ static enum counter_recovery stat_handle_error(struct evsel *counter) * (behavior changed with commit b0a873e). */ if (errno == EINVAL || errno == ENOSYS || - errno == ENOENT || errno == EOPNOTSUPP || - errno == ENXIO) { + errno == ENOENT || errno == ENXIO) { if (verbose > 0) ui__warning("%s event is not supported by the kernel.\n", evsel__name(counter)); @@ -657,7 +656,7 @@ static enum counter_recovery stat_handle_error(struct evsel *counter) if (verbose > 0) ui__warning("%s\n", msg); return COUNTER_RETRY; - } else if (target__has_per_thread(&target) && + } else if (target__has_per_thread(&target) && errno != EOPNOTSUPP && evsel_list->core.threads && evsel_list->core.threads->err_thread != -1) { /* @@ -678,6 +677,19 @@ static enum counter_recovery stat_handle_error(struct evsel *counter) return COUNTER_SKIP; } + if (errno == EOPNOTSUPP) { + if (verbose > 0) { + ui__warning("%s event is not supported by the kernel.\n", + evsel__name(counter)); + } + counter->supported = false; + counter->errored = true; + + if ((evsel__leader(counter) != counter) || + !(counter->core.leader->nr_members > 1)) + return COUNTER_SKIP; + } + evsel__open_strerror(counter, &target, errno, msg, sizeof(msg)); ui__error("%s\n", msg); diff --git a/tools/perf/tests/shell/stat.sh b/tools/perf/tests/shell/stat.sh index c6df7eec96b98..c4bef71568970 100755 --- a/tools/perf/tests/shell/stat.sh +++ b/tools/perf/tests/shell/stat.sh @@ -159,7 +159,7 @@ test_hybrid() { fi # Run default Perf stat - cycles_events=$(perf stat -- true 2>&1 | grep -E "/cycles/| cycles " | wc -l) + cycles_events=$(perf stat -- true 2>&1 | grep -E "/cycles/[uH]*| cycles[:uH]* " -c) if [ "$pmus" -ne "$cycles_events" ] then diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index cdd13f576c191..c37faef63df99 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -2892,6 +2892,27 @@ bool evsel__fallback(struct evsel *evsel, int err, char *msg, size_t msgsize) evsel->core.attr.exclude_kernel = 1; evsel->core.attr.exclude_hv = 1; + return true; + } else if (err == EOPNOTSUPP && !evsel->core.attr.exclude_guest && + !evsel->exclude_GH) { + const char *name = evsel__name(evsel); + char *new_name; + const char *sep = ":"; + + /* Is there already the separator in the name. */ + if (strchr(name, '/') || + (strchr(name, ':') && !evsel->is_libpfm_event)) + sep = ""; + + if (asprintf(&new_name, "%s%sH", name, sep) < 0) + return false; + + free(evsel->name); + evsel->name = new_name; + /* Apple M1 requires exclude_guest */ + scnprintf(msg, msgsize, "trying to fall back to excluding guest samples"); + evsel->core.attr.exclude_guest = 1; + return true; } -- 2.51.0