Date: Wed, 03 Oct 2012 19:11:10 +0200 From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> To: RW <rwmaillists@googlemail.com> Cc: Anderson <jonathan.anderson@cl.cam.ac.uk>, Pawel Jakub Dawidek <pjd@freebsd.org>, John Baldwin <jhb@freebsd.org>, Laurie <benl@freebsd.org>, Ben@FreeBSD.ORG, freebsd-security@freebsd.org, Mariusz Gromada <mariusz.gromada@gmail.com>, Jonathan@FreeBSD.ORG Subject: Re: Collecting entropy from device_attach() times. Message-ID: <86iparmqfl.fsf@ds4.des.no> In-Reply-To: <20121003145107.264e3174@gumby.homeunix.com> (RW's message of "Wed, 3 Oct 2012 14:51:07 %2B0100") References: <20120918211422.GA1400@garage.freebsd.pl> <20120919231051.4bc5335b@gumby.homeunix.com> <20120920102104.GA1397@garage.freebsd.pl> <201209200758.51924.jhb@freebsd.org> <20120922080323.GA1454@garage.freebsd.pl> <20120922195325.GH1454@garage.freebsd.pl> <505E59DC.7090505@gmail.com> <20120923151706.GN1454@garage.freebsd.pl> <5060D723.6020305@gmail.com> <CAG5KPzxf0Rfufk5K6Jt4e85xc7zXY_B3a2Sq0Uf_uVLHbV-baw@mail.gmail.com> <86r4pqqwnm.fsf@ds4.des.no> <86ipat6n0o.fsf@ds4.des.no> <86y5joiyan.fsf@ds4.des.no> <20121003011607.5553fe48@gumby.homeunix.com> <86txub93zo.fsf@ds4.des.no> <20121003145107.264e3174@gumby.homeunix.com>
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RW <rwmaillists@googlemail.com> writes: > Yes, getting a monotonically increasing value from binuptime() is > simple, but the xor issue is secondary to the problem I was referring > to when I quoted the arm code for get_cyclecount(). BTW, I just checked - the code you quoted does not exist / no longer exists anywhere in the tree. The arm implementation of get_cyclecount() uses the algorithm I suggested, with N =3D 56. DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no
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