Date: Tue, 30 Jul 2013 13:46:35 +0200 From: "O. Hartmann" <ohartman@zedat.fu-berlin.de> To: FreeBSD CURRENT <freebsd-current@freebsd.org> Subject: CURRENT: Ivy Bridge CPU (i3-3220) and Intel Bull Mountain RNG (options RDRAND_RNG) Message-ID: <20130730134635.3b6d7b31@thor.walstatt.dyndns.org>
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--Sig_/qVQ4UqXPU5dQfC+qc3ctNpJ Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable I tried the new option "options RDRAND_RNG" on my SOHO server, equipted with a Intel i3-3220 "Ivy Brdige" CPU, which is supposed to have the Bull Mountain random number generator as a piece of hardware in its uncore. Enabling the kernel option doesn't reveal any presence of such a hardware number generator. "sysct kern.random" always reports=20 kern.random.adaptors: yarrow By intentionally disallowing yarrow via commenting out options YARROW_RNG, the box reports "no adaptors loaded". So, either this Ivy Bridge has been castrated and ripped off by Intel of its RNG or FreeBSD isn't capable of detecting it properly or I'm incapable of properly configure the kernel. --Sig_/qVQ4UqXPU5dQfC+qc3ctNpJ Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.20 (FreeBSD) iQEcBAEBAgAGBQJR96efAAoJEOgBcD7A/5N8kp8H/jOg2vlXOTl4ZXuXnQczRsa2 uaIaSM6049RrhHJmoqGMTGJxlxxzfRM2oYcyQ/CWjY2fYRicj3Z2AxDZ2Oepz63S TKsKWgiC5FvDs05All0RLCBzqgvxikm5cojkERdH9hAN+xhdXao5ZLVP1LS7grna 98QRJ1Wc9/ee2yArUI1m34S/yRgGe1ZfGIA283xg+j7L5W7fGHAXTd76Lp09jQ7B 7cWVVsx+jJnqbcWHT4m1tCHQnFEruXpD7kPIkmYI4rChCQY4xaXeJnJ/5kLi/Bmp 9hMhnpgpGCDC1S56OzBZ+teJvoZ3LRJJaLvS2DBILsW/cjj1U8UL7/nMmw2U9lo= =ScPZ -----END PGP SIGNATURE----- --Sig_/qVQ4UqXPU5dQfC+qc3ctNpJ--
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