Date: Wed, 20 Jun 2018 10:05:16 -0600 From: Warner Losh <imp@bsdimp.com> To: Konstantin Belousov <kostikbel@gmail.com> Cc: Ian Lepore <ian@freebsd.org>, Allan Jude <allanjude@freebsd.org>, src-committers <src-committers@freebsd.org>, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r335276 - in head/stand/i386: gptboot zfsboot Message-ID: <CANCZdfoNV7Y450kuW-BWWdhbsk%2Bc-W7%2BrE3Gr9LFeKSBB=Ntew@mail.gmail.com> In-Reply-To: <20180620160315.GO2430@kib.kiev.ua> References: <201806170318.w5H3IvJP090557@repo.freebsd.org> <5B2646B3.4020200@grosbein.net> <93b03eb5-326b-5df1-5d41-ae3da163e894@freebsd.org> <20180620092238.GK2430@kib.kiev.ua> <1529509411.20460.83.camel@freebsd.org> <20180620160315.GO2430@kib.kiev.ua>
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On Wed, Jun 20, 2018 at 10:03 AM, Konstantin Belousov <kostikbel@gmail.com> wrote: > On Wed, Jun 20, 2018 at 09:43:31AM -0600, Ian Lepore wrote: > > On Wed, 2018-06-20 at 12:22 +0300, Konstantin Belousov wrote: > > > On Tue, Jun 19, 2018 at 08:34:18PM -0400, Allan Jude wrote: > > > > > > > > On 2018-06-17 07:32, Eugene Grosbein wrote: > > > > > > > > > > 17.06.2018 10:18, Allan Jude wrote: > > > > > > > > > > > > > > > > > Author: allanjude > > > > > > Date: Sun Jun 17 03:18:56 2018 > > > > > > New Revision: 335276 > > > > > > URL: https://svnweb.freebsd.org/changeset/base/335276 > > > > > > > > > > > > Log: > > > > > > gptboot, zfsboot, gptzfsboot: Enable the video and serial > consoles early > > > > > > > > > > > > Normally the serial console is not enabled until /boot.config > is read and > > > > > > we know how the serial console should be > configured. Initialize the > > > > > > consoles early in 'dual' mode (serial & keyboard) with a > default serial > > > > > > rate of 115200. Then serial is re-initialized once the disk is > decrypted > > > > > > and the /boot.config file can be read. > > > > > > > > > > > > This allows the GELIBoot passphrase to be provided via the > serial console. > > > > > > > > > > > > PR: 221526 > > > > > > Requested by: many > > > > > > Reviewed by: imp > > > > > > Sponsored by: Klara Systems > > > > > > Differential Revision: https://reviews.freebsd.org/D15862 > > > > > I had several cases when booting FreeBSD/amd64 with motherboard > having no serial ports > > > > > hang hard early at boot unless I rebuilt boot media configuring it > to NOT try accessing > > > > > missing serial ports. I even could reproduce that with VirtualBox > machine configured > > > > > with no serial ports (not same as existing bug inactive serial > port). > > > > > > > > > > Should there be some way to disable this serial ports > configuration at compile time? > > > > > > > > > > > > > > > > > > > I think what we'll do it compile it both ways, and use the non-serial > > > > one by default, because it is safer. Then you can just use > > > > 'gptboot-serial' if you want serial support. > > > > > > > > This will likely make Warner a bit sad, since we are just finally > > > > getting around to reducing the number of different bootcode files. > > > I think we should follow the hardware trends there and apply a policy > > > where new features are not added to the CSM boot. All modern machines > > > can be booted in UEFI mode, and if some modern machine cannot, then we > > > need it fixed. We should encourage users to make new installs boot by > > > UEFI. > > > > > > The feature from the commit is only relevant for machines that require > > > CSM boot or do not have UEFI option at all, am I right ? With the > policy > > > applied, an additional CSM-boot bootblock would be not shipped. > > > > > > > I think it is far too early to say that the code for booting without > > efi is abandonware. I have half a dozen x86 boxes in use here, and only > > one of them is even able to boot efi, and its default resolution in efi > > mode confuses the kvm switch it's connected to, so even on that I have > > to use legacy bios boot. > I do not propose to abandon bios boot, or even to declare it legacy > with the proper meaning. I mean that CSM is disappearing on the newest > platforms, and should become only used on old machines or i386. With that > attitude, adding a features for it, esp. by the cost of the user confusion, > is not worth the efforts. It still should be maintained for the foreseable > future. > > If the machines where you get the trouble is newer than say 5 years, > then they should boot with UEFI. If not, the problem in loader.efi > needs to be fixed. > There is no problem in loader.efi that's specific to geli. It already uses the UEFI boot loader config. While there's some issues downstream (eg kernel messages), this specific issue is a non-issue for loader.efi. Warer
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