Date: Thu, 10 Jul 2008 00:27:06 +0200 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-questions@freebsd.org Subject: Re: Which VIA CPUs have hardware RNG support? Message-ID: <g53dvt$f24$1@ger.gmane.org> In-Reply-To: <7956f3200807090831u1bd6bfddxf78517ae46a32b95@mail.gmail.com> References: <7956f3200807090831u1bd6bfddxf78517ae46a32b95@mail.gmail.com>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig59D13516FAA4D23302B7607B Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable Joseph Gleason wrote: > I am trying to figure out which VIA CPUs support hardware RNG under > recent FreeBSD. I've been looking at things on 7.0-RELEASE-p2. If > there is something that else I should be looking at, please let me > know. >=20 > Based on 'man 4 random' I see: > "The only hardware implementation currently is for the > VIA C3 Nehemiah (stepping 3 or greater) CPU. More will be added i= n the > future." >=20 > Poking around in the kernel I see that indeed nehemiah and yarrow seem > to be the only random sources there. >=20 >>From 'usr/src/sys/i386/i386/initcpu.c': > SYSCTL_UINT(_hw, OID_AUTO, via_feature_rng, CTLFLAG_RD, > &via_feature_rng, 0, "VIA C3/C7 RNG feature available in CPU");= >=20 > Based on all this and some reading on wikipedia, my best guess is that > C3 Nehemiah and later and all C7 support the hardware RNG. Can anyone > confirm this? If you don't get any answers here, try freebsd-hardware@ mailing list. AFAIK (I don't have the hardware), the source is correct and C7 is also=20 supported. I'd be glad to hear if anyone confirms it. --------------enig59D13516FAA4D23302B7607B Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFIdTs7ldnAQVacBcgRAsKdAJ43iVze3lVZMOiW+M9rlz2/FC869ACeJW4z /7GMQuhSwPijybBaUZC9XTE= =lMlm -----END PGP SIGNATURE----- --------------enig59D13516FAA4D23302B7607B--
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