From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.18]) (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 799251F428B; Thu, 17 Oct 2024 23:27:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729207664; cv=none; b=DM1BfX0rKQ4Fm94FvIuIf25vYpCUZmCMKMSVaWfDoHIIqvoZgv2xetSpplg9CzM5xmaEQTFwekiN33JbDwxTU90LWfas1wv9MrzWSgiA1ndvgLs9cL1YlXHLnz9xnMfbN/SgQ4pAuiCRJbd3oO/QslZGwjFLQpjaaSGYEAdm64I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729207664; c=relaxed/simple; bh=ifz3yshYbLZ1aHxcRzTbeBb3kbz/UBxDdTmrzJaM2H4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=u2ibPnahS3G+IYn4tU5BDFGXgi156x9xlriSCK2mmLrtJ+LIOKOlAj8jjKlIF9f66DJK+usiFSPNfffqNPTTpKSDoDAYZ7R4z2j50nUdMre+DRagA1x22+rBEXvCZfNMmZurhoSKjMQVNeaCCGy3vLRfdD+GkXFbmpr2e7I+3uI= 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=QrNLxfmj; arc=none smtp.client-ip=198.175.65.18 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="QrNLxfmj" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1729207662; x=1760743662; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=ifz3yshYbLZ1aHxcRzTbeBb3kbz/UBxDdTmrzJaM2H4=; b=QrNLxfmjHcET3J6uGVH/pOXn+d/6vjm+RsR+enw/XTnosTMq3gPDDkZn 1WjM+D7j0OzTzGxy/oieGZ3hFzF3pUX3N98PXfiVarlQw39XM4PjD/s1c NENIr15vKL05WM6WnSwKJNRyvw4v3YF0ohNAuImrQu0byXQGBEI3NUMfo xP6NmLGf9quTNfJe8MoD9zkxUBbFG4EuGBKjG582tSTaTEDkzR7Sujw86 nkBdab+oGcsXrwDnOkYX/l3WE/Ql/VIf111Goq1oUhK03y6WzRsWrUlsD YkkapQs3CGoRrT5/v94UnrioeXYcS3ZBcJCenC1U1eF4yKRxzmeXFu/pV Q==; X-CSE-ConnectionGUID: HQJ6VIAIQ9G6sZh3obr6UA== X-CSE-MsgGUID: kBa+XAqcRlGJSdXEhvFwKg== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="28875879" X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="28875879" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by orvoesa110.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Oct 2024 16:27:42 -0700 X-CSE-ConnectionGUID: CiYqMp44SOCRf5IA5M4PGw== X-CSE-MsgGUID: gErvNAL5QnW2fFCwIbd/GQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,212,1725346800"; d="scan'208";a="109518421" Received: from ranerica-svr.sc.intel.com ([172.25.110.23]) by orviesa002.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Oct 2024 16:27:42 -0700 Date: Thu, 17 Oct 2024 16:33:43 -0700 From: Ricardo Neri To: Mario Limonciello Cc: Borislav Petkov , Hans de Goede , Ilpo =?iso-8859-1?Q?J=E4rvinen?= , x86@kernel.org, "Gautham R . Shenoy" , Perry Yuan , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-pm@vger.kernel.org, platform-driver-x86@vger.kernel.org, Shyam Sundar S K Subject: Re: [PATCH v2 05/13] platform/x86: hfi: Introduce AMD Hardware Feedback Interface Driver Message-ID: <20241017233343.GA308@ranerica-svr.sc.intel.com> References: <20241010193705.10362-1-mario.limonciello@amd.com> <20241010193705.10362-6-mario.limonciello@amd.com> <20241015035233.GA28522@ranerica-svr.sc.intel.com> <1395bee1-95a7-4d14-a5e8-0e1dc71fadac@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@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: <1395bee1-95a7-4d14-a5e8-0e1dc71fadac@amd.com> User-Agent: Mutt/1.9.4 (2018-02-28) On Tue, Oct 15, 2024 at 01:09:42PM -0500, Mario Limonciello wrote: > > > > > Link: https://bugzilla.kernel.org/show_bug.cgi?id=206537 > > > > I tried to find the HFI details on the documents in this "bug" but I could > > not find them. What document in specific could I look at? > > > > Thanks and BR, > > Ricardo > > Hi Ricardo, > > It is spread out across multiple places. This is part of the reason for > patch 1 in the series outlines details of how it works. > > The reason for that "collect all" Bugzilla for documentation is because the > URLs for AMD documentation have undergone changes in the past and it makes > it difficult to put stable URLs in commit messages. So teams that want to > reference documentation put it on a dump all bug for a stable URL to > reference. > > On that link you will find the APM, which will have some documentation > specifically for the CPUID leafs used for topology identification and > clearing history. > > Read patch 1 and let me know if it covers what specifically you're looking > for. If it's still missing some info let me know what you would like added. Thank you for your reply! I read patch 1. I was wondering specifically about more details of the Class ID. I see that they have associated counters and desired scheduling behavior. I was also curious about the layout of the HFI table. I guess I can infer it from patches 5 and 6 but if there is a picture already, I wouldn't mind. ;)