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[2620:137:e000::1:20]) by mx.google.com with ESMTP id i31-20020a0564020f1f00b004603a95e1d3si2292877eda.135.2022.10.20.10.55.35; Thu, 20 Oct 2022 10:56:00 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=GZHr20Z8; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229712AbiJTRTF (ORCPT + 99 others); Thu, 20 Oct 2022 13:19:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39306 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229633AbiJTRTD (ORCPT ); Thu, 20 Oct 2022 13:19:03 -0400 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 63F221E3ED5 for ; Thu, 20 Oct 2022 10:19:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1666286341; x=1697822341; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=qiepO4q83dpntJ7mlNaok9XWrDJes8Gjp55+tdgdXpo=; b=GZHr20Z87buwvbZ5ZRLVTFfGSUVg9zFaIplw3Rjh+sXvYjnpOrMtTjPB oMc2ugp0sB+H7RKQJer9JVQmr4s1S5MlFkk6N1FTd6NCVwEcwW26GCOX7 HRRx1DXiF2pgpo5v9lRPyUEI3mMj7PCZD8RT7FtgyZqZWuDPeDMV7dGio VtsbZMtLodap+z8MvNcKtDFjZHlw0JQVFZBe4wEq6ReZr1+5DGVZ515oD LaHcFPsN0+RR444qpSNW8HSrlNlGmiVLuvOUOyAclzDL9xGOEidN/L8Td s5kuiVDDOqRdWCQHd9N/EkY4hS3AxtIMCETCkky/svNe7HuRpDbt/xcHT Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10506"; a="290085762" X-IronPort-AV: E=Sophos;i="5.95,199,1661842800"; d="scan'208";a="290085762" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Oct 2022 10:19:00 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10506"; a="875132653" X-IronPort-AV: E=Sophos;i="5.95,199,1661842800"; d="scan'208";a="875132653" Received: from amancuso-mobl.amr.corp.intel.com (HELO [10.209.121.211]) ([10.209.121.211]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Oct 2022 10:18:59 -0700 Message-ID: <3d65c4cc-c002-9e6a-c6ea-fd776968a178@intel.com> Date: Thu, 20 Oct 2022 10:18:47 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.2.2 Subject: Re: [PATCH v2] Add hardcoded crystal clock for KabyLake Content-Language: en-US To: Peter Zijlstra , Rishabh Agrawal Cc: LKML , len.brown@intel.com, drake@endlessm.com, rafael.j.wysocki@intel.com, mingo@redhat.com, tglx@linutronix.de, vaibhav.shankar@intel.com, biernacki@google.com, zwisler@google.com, mattedavis@google.com, Borislav Petkov , Dave Hansen , Feng Tang , Greg Kroah-Hartman , "H. Peter Anvin" , x86@kernel.org References: <20221018190124.v2.1.I918ccc908c5c836c1e21e01d2cf6f59b0157bcc3@changeid> From: Dave Hansen In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-2.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NICE_REPLY_A, SPF_HELO_NONE,SPF_NONE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/20/22 10:13, Peter Zijlstra wrote: > And why, pray *WHY* can't Intel simply write the correct information in > CPUID leaf 15h. I mean, they defined the leaf, might as well use it, no? Is the data that's in the leaf just wrong? Doesn't that mean that the CPUID leaf on these models is violating the architecture contract? That sounds like something that deserves an erratum. Is there a documented erratum?