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Date:      Tue, 10 Jan 2012 10:54:03 +0100
From:      Yamagi Burmeister <lists@yamagi.org>
To:        kostikbel@gmail.com
Cc:        amd64@freebsd.org, arch@freebsd.org, marius@freebsd.org, flo@freebsd.org
Subject:   Re: AVX
Message-ID:  <20120110105403.f5a425a4.lists@yamagi.org>
In-Reply-To: <20120109202214.GZ31224@deviant.kiev.zoral.com.ua>
References:  <20111226220756.GR50300@deviant.kiev.zoral.com.ua> <20120102063700.GF50300@deviant.kiev.zoral.com.ua> <20120108174112.50e030ba.lists@yamagi.org> <20120108195913.GI31224@deviant.kiev.zoral.com.ua> <20120109103747.578d4e44.lists@yamagi.org> <20120109202214.GZ31224@deviant.kiev.zoral.com.ua>

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On Mon, 9 Jan 2012 22:22:14 +0200
Kostik Belousov <kostikbel@gmail.com> wrote:

> > > > CPU: Intel(R) Core(TM)2 Duo CPU     T6670  @ 2.20GHz (2194.55-MHz
> > > > K8-class CPU) Origin =3D "GenuineIntel"  Id =3D 0x1067a  Family =3D=
 6  Model
> > > >   =3D 17  Stepping =3D 10
> > > > Features=3D0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,M=
TRR,PGE,
> > > >   MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,P=
BE>
> > > > Features2=3D0x408e3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16=
,xTPR,
> > > >   PDCM,SSE4.1,XSAVE>
> > > > AMD Features=3D0x20100800<SYSCALL,NX,LM> AMD Features2=3D0x1<LAHF>=
=20
> > > Is this Features excerpt from the patched kernel, or from pristine svn
> > > sources ? If the later, please show me the Features from the patched
> > > kernel.
> >=20
> > That was the output of the patched kernel.
> I see. The issue was that cpu_feature2, which is decoded to print the
> Features2 line, is retrieved much earlier then XCR0 is updated by
> fpu initialization code. I added a cludge to reload cpu_feature2 if
> XSAVE was indeed enabled. So now you should see OSXSAVE reported if
> XSAVE is indeed enabled.

Seems to be okay now:

Features2=3D0xc08e3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,
SSSE3,CX16,xTPR,PDCM,SSE4.1,XSAVE,OSXSAVE>

--=20
Homepage:  www.yamagi.org
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