Date: Mon, 5 Jan 2015 21:23:10 -0800 From: Neel Natu <neelnatu@gmail.com> To: Sean Bruno <sbruno@freebsd.org> Cc: Andrey Fesenko <f0andrey@gmail.com>, FreeBSD current <freebsd-current@freebsd.org> Subject: Re: Haswell CPU Feature Message-ID: <CAFgRE9GOMHs=Wj0Yt0Q08bPd2Dk7apkhS4otVzBk3zN6m4xaLg@mail.gmail.com> In-Reply-To: <54AB49C2.9020005@ignoranthack.me> References: <54AB306F.2070509@ignoranthack.me> <CAFgRE9Fg=YtoOXD3P2b_w9-rF4QCrMqWxqa2SGLLN-Gx00koVQ@mail.gmail.com> <54AB394E.5040601@ignoranthack.me> <CA%2BK5SrPBn5DCVseMJYneL04y-QBmNmfxf8gXr9P6zicwC4g5uw@mail.gmail.com> <54AB49C2.9020005@ignoranthack.me>
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Hi Sean, On Mon, Jan 5, 2015 at 6:34 PM, Sean Bruno <sbruno@ignoranthack.me> wrote: > -----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 <sbruno@ignoranthack.me> >> 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<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> >> >> > Features2=0x7ffafbff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,<b11>,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<b11>" > + "\014SDBG" /* IA32_DEBUG_INTERFACE debug*/ > "\015FMA" /* Fused Multiply Add */ > "\016CX16" /* CMPXCHG16B Instruction */ > "\017xTPR" /* Send Task Priority Messages*/ > > Looks good. best Neel > 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----- > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
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