From owner-freebsd-current@FreeBSD.ORG Tue Jan 6 02:34:45 2015 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 223B0C56 for ; Tue, 6 Jan 2015 02:34:45 +0000 (UTC) Received: from mail.ignoranthack.me (ignoranthack.me [199.102.79.106]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id F27E366D18 for ; Tue, 6 Jan 2015 02:34:44 +0000 (UTC) Received: from [10.12.76.163] (llnw-corp-src.phx2.llnw.com [69.164.56.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: sbruno@ignoranthack.me) by mail.ignoranthack.me (Postfix) with ESMTPSA id D855F192A3B; Tue, 6 Jan 2015 02:34:42 +0000 (UTC) Message-ID: <54AB49C2.9020005@ignoranthack.me> Date: Mon, 05 Jan 2015 18:34:42 -0800 From: Sean Bruno Reply-To: sbruno@freebsd.org User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: Andrey Fesenko Subject: Re: Haswell CPU Feature References: <54AB306F.2070509@ignoranthack.me> <54AB394E.5040601@ignoranthack.me> In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Cc: FreeBSD current X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Jan 2015 02:34:45 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 On 01/05/15 17:50, Andrey Fesenko wrote: > On Tue, Jan 6, 2015 at 4:24 AM, Sean Bruno > wrote: >> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 >> >> On 01/05/15 16:57, Neel Natu wrote: >>> Congratulations, you have the ability to debug the Haswell >>> silicon >>> >> HA! >> >> Is this turned on purposefully (its a feature of the CPU) or is >> this turned on unintentionally and is a bug in manufacturing? >> >> sean > > My desktop i5-4570 contain this flag too > > Origin="GenuineIntel" Id=0x306c3 Family=0x6 Model=0x3c > Stepping=3 > Features=0xbfebfbff > > Features2=0x7ffafbff,FMA,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX,F16C,RDRAND> > > I'm thinking something like this: Index: sys/x86/x86/identcpu.c =================================================================== - --- sys/x86/x86/identcpu.c (revision 276729) +++ sys/x86/x86/identcpu.c (working copy) @@ -781,7 +781,7 @@ "\011TM2" /* Thermal Monitor 2 */ "\012SSSE3" /* SSSE3 */ "\013CNXT-ID" /* L1 context ID available */ - - "\014" + "\014SDBG" /* IA32_DEBUG_INTERFACE debug*/ "\015FMA" /* Fused Multiply Add */ "\016CX16" /* CMPXCHG16B Instruction */ "\017xTPR" /* Send Task Priority Messages*/ sean -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQF8BAEBCgBmBQJUq0m+XxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRCQUFENDYzMkU3MTIxREU4RDIwOTk3REQx MjAxRUZDQTFFNzI3RTY0AAoJEBIB78oecn5kigkIAI2Naiv2TENl+1SFAQ5oHTUu HR+sbz3o7p71W8/9WhdkiMhHLwpF5ZGrpqh9Jc4CYuyNax4OvzD9du8b1RFVVBtx AR6K+zFE1/wHC8S+iEB2QsWLWjd6Y0NbZL1MvgEQTybFwLzdtEXafOi2gSsa2lK0 RFMd0VbE2xn2q9mp5GuTnR8fvqWGPSJLEtWTpEZri8vFnBIMC+kocb//kOhY6JsF SNcpJ2RfhXiQyOOZT/ETe47s7A29R9VW5u/+Hg8VnNuq5rV5o2PXa68VvSmAu4gr IxPMoodFUITXTpS/lfmkOf4W+uTSqUji+Y/u1yjNzS4MgodoEh6mc7gDuH9Xoj0= =j1kZ -----END PGP SIGNATURE-----