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 1A9F61922F0; Thu, 27 Jun 2024 13:22:38 +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=1719494560; cv=none; b=agl5Ihk/dmPJw+VSxCnJiV03Z/W+lgTwiN9+rBPPFINAqZ3NZMtS7QJNWP1owPJeF2GSUy71uAaC5kSvgJWdL/uHjTd5PH2cAOylm8WTKTwu7ob7VvyOppt8+LhtXoc5TkufapAfmign+WE6LlgiKcUIuFhkyjvKtm1UQXJeP+A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719494560; c=relaxed/simple; bh=sYZzBfVpbkVWGXURUrII3QmUq5Xw6Km4gz1FrEScJGg=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=QIEV/wm9iqURicuip98vhHt9zNwwG6nmmAz6sziB3T6NIzFIT7hfAjqIIkN5WFNqxEw3OHD/JUjS12LiuB5p/nnEyl949NKqgf8Tw1KA5boLiCMeMbdsuoMXx4WGp6CQT8fWDKNY0dbHZAM3FbrF1BZZxNqQZ80jRvh86mRk4wQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=QgGZ45cO; arc=none smtp.client-ip=198.175.65.12 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="QgGZ45cO" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1719494559; x=1751030559; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=sYZzBfVpbkVWGXURUrII3QmUq5Xw6Km4gz1FrEScJGg=; b=QgGZ45cOJ/Nq+P4SF2TpSaOzaDLRmVAYe+LvI+3s8sLuYuuO/EhOw5NP nV+p3N/I8glE/XyMD0rTEgc7f4F0vUV8WxnQ8Emk+owZLgRZe8iVraNV5 KyDnyVPZE3NFnGGoE7xxG7wWI8Gl42hzJLdGlDhnfKjU+D9nAbpXY+Duc mtEcfeAjsrUZy5YV58GgcutUum3mXPItVI4V8T9LdQn8KFq1d0XFkUZSm 1ZzbY55xIFxo/cPnWA7sGuq7xsvSD3CxfridCKb67sNl0qvc2+IhS5gJ7 Tg+1EtNMWvXlnuIs5CHrTUS64HWk7ax/HsVtXGWjef37roYee1fvJhGt3 Q==; X-CSE-ConnectionGUID: slCPcKKnQKSXuOdqQMaieQ== X-CSE-MsgGUID: FE/lNSCUQ4ikNrZit5TCJg== X-IronPort-AV: E=McAfee;i="6700,10204,11115"; a="28018776" X-IronPort-AV: E=Sophos;i="6.09,166,1716274800"; d="scan'208";a="28018776" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by orvoesa104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Jun 2024 06:22:39 -0700 X-CSE-ConnectionGUID: qdCob1gQQJWd/B+mutPrkA== X-CSE-MsgGUID: jdMa1DTATRO5fJ2LEKU7bA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.09,166,1716274800"; d="scan'208";a="44440231" Received: from cdipalma-mobl.amr.corp.intel.com (HELO desk) ([10.209.104.34]) by fmviesa009-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Jun 2024 06:22:37 -0700 Date: Thu, 27 Jun 2024 06:22:30 -0700 From: Pawan Gupta To: Ricardo Neri Cc: Dave Hansen , Brice Goglin , srinivas pandruvada , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, daniel.sneddon@linux.intel.com, tony.luck@intel.com, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-perf-users@vger.kernel.org, Josh Poimboeuf , "Rafael J. Wysocki" , "Liang, Kan" , Andrew Cooper Subject: Re: [PATCH 0/9] Add CPU-type to topology Message-ID: <20240627132230.hondzls5bt3jspay@desk> References: <20240617-add-cpu-type-v1-0-b88998c01e76@linux.intel.com> <8d757ea3-87a3-4663-ac76-66b04e33e6b3@gmail.com> <20240619015315.3ei5f6rovzdnxovo@desk> <0021f5f2-67c5-4b20-939d-48c9c1c60cdb@gmail.com> <1b99017a-6964-46de-ba3a-09552e7cf072@intel.com> <20240627125154.GA4743@ranerica-svr.sc.intel.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240627125154.GA4743@ranerica-svr.sc.intel.com> On Thu, Jun 27, 2024 at 05:51:54AM -0700, Ricardo Neri wrote: > ARM gives userspace specific details. This makes more sense to me. Instead > of reading these details, user space would have to infer these details if > a CPU type was given in sysfs. > > Having said that, Intel does have a CPUID leaf that gives the CPU type. Such > leaf also has a "Native Model ID". Exposing only the CPU type may not be > sufficient. Do we know if there are applications that would benefit from this information? We agreed to leave sysfs for another series. I will be sending v2 soon.