Date: Tue, 16 Apr 2019 09:58:53 -0700 From: Conrad Meyer <cem@freebsd.org> To: Warner Losh <imp@bsdimp.com> Cc: "Conrad E. Meyer" <cem@freebsd.org>, src-committers <src-committers@freebsd.org>, svn-src-all <svn-src-all@freebsd.org>, svn-src-head <svn-src-head@freebsd.org> Subject: Re: svn commit: r346250 - in head: share/man/man4 share/man/man9 sys/dev/random sys/kern sys/libkern sys/sys Message-ID: <CAG6CVpW2RSBGVZFZota4j4nDDVzKUzOKXhaJtFNO9xx1js6NrA@mail.gmail.com> In-Reply-To: <CANCZdfqsY0RAJv7fKj9Fyb34wmxCULFCFi4Ph8s2bYPWtVP6fA@mail.gmail.com> References: <201904151840.x3FIeaEQ009242@repo.freebsd.org> <CAPyFy2D9NQQKwVx5MhCfasQ82x7C9s6mj5kXuDE1oogrQeoJ5A@mail.gmail.com> <CAHSQbTAfwYcLenBxg4ZB13P03S%2BTYEM1-xy3BYsSWJ49hBWLZA@mail.gmail.com> <CAG6CVpXwOhSpmCT1SShvEOZAdjbQSk5xSzk%2BLk8c5fMpnhSKQw@mail.gmail.com> <CAG6CVpUqy75_iEU-OwC21LOQFrXTO7rMz3B4iHi7GBTfsqK_5w@mail.gmail.com> <20190416150352.c604a280368ccb2992a861e8@bidouilliste.com> <CANCZdfqwfdPnr3HBAw6=YdPW_0yLsS4OpJMhiqFxWSM6BVJ-Zw@mail.gmail.com> <310a420ee0b9e12249979d89dc4fa0d4cac5a8dc.camel@freebsd.org> <CANCZdfrNsBMqKrnqVzTNVNwCcHj5ZYrKhjss_%2Bp6i=rKqwYFNA@mail.gmail.com> <CAG6CVpW_Tjz_mPmMPForKAO3gLhES63TtdNyZcg0pTkb3z%2BTRw@mail.gmail.com> <CANCZdfqsY0RAJv7fKj9Fyb34wmxCULFCFi4Ph8s2bYPWtVP6fA@mail.gmail.com>
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On Tue, Apr 16, 2019 at 9:33 AM Warner Losh <imp@bsdimp.com> wrote: > In that case, we're better off having a MD routine that gets called if there's no loader-provided entropy pool. Yes, this is more or less the same plan I had. There's no need to add anything MD specific; we already abstract MD random sources behind the harvest mechanism. > (and requiring an NV store is not even an option to require, so don't go there). Systems lacking both an NV store and an entropy source available during mi_startup (i.e., not interrupts...) cannot safely provide entropy in early boot. On those systems, we must disable random consumption during early boot. > What we can't do is just hang if the loader can't provide an entropy pool. I think we're all on the same page there. Best, Conrad
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