From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.12]) (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 AEEAF274B4A for ; Wed, 1 Jul 2026 13:55:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.12 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782914104; cv=none; b=Qhf7ZOiJRQyAy+2KLz2q6SMoc7MuP9KtonxG5vQmitVFVOrgWh8YkKpS3v7bHIr69coZbe8pbccweHcqNgxj4Ea2O8I0fYGU3oWiZRkbtTRjjtOfALH8RaJA8X2HkVilor+pGy3mAT6A8r3Q0tsFmpQ6WPPQ1qh7TdoEqJboPs4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782914104; c=relaxed/simple; bh=AR5xoYab1CJ10AldGPUj+Hzq7PgoEB5fST8s2MQ8l/0=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=fy7sFzh86qB27wgjZMc3RKvMbtaxYaDniOIjFMjOp/G7WuMWfUUMK6onWtjFkJohTqL38A4l4ht5ZdVqopCqagyO/9FLyP3VcDBQcjg0n860tx4BJ6zOzkmwHEWTbeoZPhKd7c2lWGEZ6UntFoKMBhOoBITzaW63Qy+Jjj7jn3k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=ervAF5OW; arc=none smtp.client-ip=198.175.65.12 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="ervAF5OW" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1782914103; x=1814450103; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=AR5xoYab1CJ10AldGPUj+Hzq7PgoEB5fST8s2MQ8l/0=; b=ervAF5OWMfFQ8TSsvyqRQyRxKWtjlG884nmpvm1cT4rOu6qWxZTuW8Y9 /xZ//eeYwUjO0NhxbGo22PHPXsexpC/2z02evD0wajXP1E936gQXYm+2z LOX5anCC5YCiBRYxxA+pTI0ggGNjcK2E43Q7jNSR2vB/L712yRoVZ/jjY lQhOOdUV1twCg+OvRzuwBi7Y0ZqCulGkys4fm7UvpKVD95uEDcQUUEjyn suoWALtvJo9cLPxweUriLk8Za+M0vG3ycF7sXk1vOa7Gk6IBPkqeOxJGx MNWmq6JQykjI8dF5oGZn//IhhqkGoMlErbQx7+gh8zIm5wPPqukBIyir+ g==; X-CSE-ConnectionGUID: 5IAED3dcTpevzdjXNIxkqw== X-CSE-MsgGUID: lh1T+9j+SyKEHubnW/6vCA== X-IronPort-AV: E=McAfee;i="6800,10657,11833"; a="95149560" X-IronPort-AV: E=Sophos;i="6.25,141,1779174000"; d="scan'208";a="95149560" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by orvoesa104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jul 2026 06:55:03 -0700 X-CSE-ConnectionGUID: FlVSMdnKTly4WbDPH0TCTA== X-CSE-MsgGUID: YqapgwWXTyGSG4pZg2d57g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,141,1779174000"; d="scan'208";a="246213557" Received: from chenyu-dev.sh.intel.com ([10.239.62.107]) by fmviesa009.fm.intel.com with ESMTP; 01 Jul 2026 06:54:58 -0700 From: Chen Yu To: tony.luck@intel.com, reinette.chatre@intel.com Cc: x86@kernel.org, linux-kernel@vger.kernel.org, tglx@kernel.org, bp@alien8.de, mingo@redhat.com, dave.hansen@linux.intel.com, hpa@zytor.com, fenghuay@nvidia.com, babu.moger@amd.com, anil.keshavamurthy@broadcom.com, chen.yu@linux.dev, Chen Yu , Hongyu Ning Subject: [PATCH v5 01/10] x86/resctrl: Require 64-bit x86 for resctrl support Date: Wed, 1 Jul 2026 21:45:03 +0800 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit All known hardware that supports Intel RDT or AMD QoS is 64-bit. Future enhancements like MMIO-based Enhanced RDT (ERDT) monitoring require readq()/writeq() which are only available on 64-bit. There is also no realistic use case for users to build a 32-bit kernel on a server and enable resctrl. Drop 32-bit support by changing the X86_CPU_RESCTRL dependency from X86 to X86_64. Since X86_CPU_RESCTRL now implies X86_64, remove the redundant X86_64 dependency from X86_CPU_RESCTRL_INTEL_AET. Tested-by: Hongyu Ning Signed-off-by: Chen Yu --- v4->v5: New patch. Split from previous patch in v4. --- arch/x86/Kconfig | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index fa4f0079614c..b2c2b10f8a57 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -514,7 +514,7 @@ config X86_MPPARSE config X86_CPU_RESCTRL bool "x86 CPU resource control support" - depends on X86 && (CPU_SUP_INTEL || CPU_SUP_AMD) + depends on X86_64 && (CPU_SUP_INTEL || CPU_SUP_AMD) depends on MISC_FILESYSTEMS select ARCH_HAS_CPU_RESCTRL select RESCTRL_FS @@ -537,7 +537,7 @@ config X86_CPU_RESCTRL config X86_CPU_RESCTRL_INTEL_AET bool "Intel Application Energy Telemetry" - depends on X86_64 && X86_CPU_RESCTRL && CPU_SUP_INTEL && INTEL_PMT_TELEMETRY=y && INTEL_TPMI=y + depends on X86_CPU_RESCTRL && CPU_SUP_INTEL && INTEL_PMT_TELEMETRY=y && INTEL_TPMI=y help Enable per-RMID telemetry events in resctrl. -- 2.45.2