Date: Thu, 12 May 2005 17:43:00 -0700 From: Kris Kennaway <kris@obsecurity.org> To: Nate Lawson <nate@root.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/amd64/amd64 mp_machdep.c src/sys/amd64/include cpufunc.h src/sys/i386/i386 mp_machdep.c src/sys/i386/include cpufunc.h Message-ID: <20050513004300.GA76382@xor.obsecurity.org> In-Reply-To: <4283F708.4020304@root.org> References: <20050513000600.8390E16A52A@hub.freebsd.org> <4283F708.4020304@root.org>
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[-- Attachment #1 --] On Thu, May 12, 2005 at 05:38:32PM -0700, Nate Lawson wrote: > Jacques Vidrine wrote: > >nectar 2005-05-13 00:05:56 UTC > > > > FreeBSD src repository > > > > Modified files: > > sys/amd64/amd64 mp_machdep.c > > sys/amd64/include cpufunc.h > > sys/i386/i386 mp_machdep.c > > sys/i386/include cpufunc.h > > Log: > > Add a knob for disabling/enabling HTT, "machdep.hyperthreading_allowed". > > Default off due to information disclosure on multi-user systems. > > > > Submitted by: cperciva > > Reviewed by: jhb > > > > Revision Changes Path > > 1.254 +101 -0 src/sys/amd64/amd64/mp_machdep.c > > 1.148 +8 -0 src/sys/amd64/include/cpufunc.h > > 1.248 +101 -0 src/sys/i386/i386/mp_machdep.c > > 1.144 +8 -0 src/sys/i386/include/cpufunc.h > > What's the problem? I hope this is not about timing attacks on crypto > operations. Come to Colin's talk tomorrow morning at BSDCan :-) Kris [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFCg/gUWry0BWjoQKURAqbOAKDBy/eGfKa6aBEBtj04xymZ+G8uBwCfYk3V /0fZD9NWguslXDjC4jT1h9M= =3/8f -----END PGP SIGNATURE-----
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