From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 7263C4734FC for ; Wed, 9 Sep 2026 09:39:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788946761; cv=none; b=lty94/5KjjhcUWzzUMJiFgdKkxY0onP04yDvE1rI16HulkFY7yDmfO0KNXOzRUq2qtiIPuJpkifnK2oIG2TZE8b6gJJu4Rk/lRP+98zDhvuRVo3zem9+B4zHzJIZa/OIZYNOZKCBkQpITzTA3vLTZf6w5OHHAg4d1ILxs1oT/RQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788946761; c=relaxed/simple; bh=j0XZm8HXpnMYoMvS81f/OAvVGEt8xZgP+d9d1naQcBs=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=EQ60nPpAQC+K2TUqwWGoZO5Pn1SVbbg09ej60XzA0gEvvveS4eSz0hkLoOhfs9i2l6Y1CFL3MMWE/dpczC4w5yG8if3/jlby1PVus882S6xBzy6NOpTjp/lkuw9+QKv7uGAPJcCWTkwk4SVhI5Nir5RPV9rWvMcNj1XrdhQtGag= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=LLqRlKWu; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="LLqRlKWu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6EABF1F00A3D; Wed, 9 Sep 2026 09:39:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788946755; bh=vPAt6oYt0QMFkX07tdbtNUVVBQsZIOBvEtLQjnVQOT8=; h=Subject:To:Cc:From:Date; b=LLqRlKWuSkKXbE+NmDXxy8hFq0C/w9sph/tI358n5nq+aTNoYiaRDSLM/ugyY4pQe iW1Bfti9JXY2FicPdRbWIDAUsGswXyHVSNVIDH3F4YNRhatRR53AAFvVfyTebTrLnL vn6dC3WzfsWXgU0zIs3AxNmfQZBIfKj9SJCKuBi4= Subject: FAILED: patch "[PATCH] perf/x86/intel: Remove anythread_deprecated bit from" failed to apply to 6.12-stable tree To: dapeng1.mi@linux.intel.com,namhyung@kernel.org,peterz@infradead.org,thomas.falcon@intel.com,zide.chen@intel.com Cc: From: Date: Wed, 09 Sep 2026 11:38:59 +0200 Message-ID: <2026090959-treadmill-straddle-c245@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.12-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y git checkout FETCH_HEAD git cherry-pick -x 8767b4d73018bd3143f4c55b672064fad292f11b # git commit -s git send-email --to '' --in-reply-to '2026090959-treadmill-straddle-c245@gregkh' --subject-prefix 'PATCH 6.12.y' 'HEAD^..' Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 8767b4d73018bd3143f4c55b672064fad292f11b Mon Sep 17 00:00:00 2001 From: Dapeng Mi Date: Tue, 16 Jun 2026 12:46:47 +0800 Subject: [PATCH] perf/x86/intel: Remove anythread_deprecated bit from perf_capabilities AnyThread mode deprecation is enumerated by CPUID.0AH:EDX[15] instead of PERF_CAPABILITIES MSR. It's not a good practice to define a bit to represent "anythread deprecation" in perf_capabilities. It leads to the anythread_deprecated bit could be overwritten by the real value of PERF_CAPABILITIES MSR, just like the below code in update_pmu_cap() does. if (!intel_pmu_broken_perf_cap()) { /* Perf Metric (Bit 15) and PEBS via PT (Bit 16) are hybrid enumeration */ rdmsrq(MSR_IA32_PERF_CAPABILITIES, hybrid(pmu, intel_cap).capabilities); } It leads to the anythread_deprecated bit is cleared to 0 and the "any" attribute is incorrectly shown in the /sys/devices/cpu/format/ folder on these support Perfmon v6 platforms, like Clearwater Forest. $ grep . /sys/devices/cpu/format/* /sys/devices/cpu/format/acr_mask:config2:0-63 /sys/devices/cpu/format/any:config:21 /sys/devices/cpu/format/cmask:config:24-31 So remove the anythread_deprecated bit from perf_capabilities structure and directly depends on CPUID.0AH:EDX[15] to judge if anythread is deprecated. Fixes: cadbaa039b99 ("perf/x86/intel: Make anythread filter support conditional") Reported-by: Namhyung Kim Signed-off-by: Dapeng Mi Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Zide Chen Reviewed-by: Thomas Falcon Acked-by: Namhyung Kim Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260616044654.3468742-2-dapeng1.mi@linux.intel.com diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c index 2b35483e2b70..465c414f145d 100644 --- a/arch/x86/events/intel/core.c +++ b/arch/x86/events/intel/core.c @@ -7947,12 +7947,6 @@ __init int intel_pmu_init(void) x86_add_quirk(intel_arch_events_quirk); /* Install first, so it runs last */ - if (version >= 5) { - x86_pmu.intel_cap.anythread_deprecated = edx.split.anythread_deprecated; - if (x86_pmu.intel_cap.anythread_deprecated) - pr_cont(" AnyThread deprecated, "); - } - /* The perf side of core PMU is ready to support the mediated vPMU. */ x86_get_pmu(smp_processor_id())->capabilities |= PERF_PMU_CAP_MEDIATED_VPMU; @@ -8829,8 +8823,10 @@ __init int intel_pmu_init(void) &x86_pmu.intel_ctrl); /* AnyThread may be deprecated on arch perfmon v5 or later */ - if (x86_pmu.intel_cap.anythread_deprecated) + if (version >= 5 && edx.split.anythread_deprecated) { x86_pmu.format_attrs = intel_arch_formats_attr; + pr_cont("AnyThread deprecated, "); + } intel_pmu_check_event_constraints_all(NULL); diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h index eae24bb35dc1..5902a297daa1 100644 --- a/arch/x86/events/perf_event.h +++ b/arch/x86/events/perf_event.h @@ -668,7 +668,7 @@ union perf_capabilities { u64 perf_metrics:1; u64 pebs_output_pt_available:1; u64 pebs_timing_info:1; - u64 anythread_deprecated:1; + u64 __reserved:1; u64 rdpmc_metrics_clear:1; }; u64 capabilities;