Date: Thu, 12 Aug 2021 18:45:18 +0200 From: Roger Pau =?utf-8?B?TW9ubsOp?= <royger@freebsd.org> To: "Lizbeth Mutterhunt, Ph.D" <lizbethmutterhunt@gmail.com> Cc: "freebsd-xen@freebsd.org" <freebsd-xen@freebsd.org> Subject: Re: another xen-kernel UEFI story Message-ID: <YRVQHmzo5c7Tq3Dn@Air-de-Roger> In-Reply-To: <0FD46B61-6556-4912-814F-4A26988CC23E@gmail.com> References: <3839452.BRNeRiNLvY@freebsd_current> <YRItEsEb/IaXqE9V@Air-de-Roger> <3837161.BRNeRiNLvY@freebsd_current> <YRJ//ZedH2Cukpzy@Air-de-Roger> <CAPPf1PGp=kdq1ZWp3-TER5TQvm5sE3reZGNGNMSiqH7NR3Sv4Q@mail.gmail.com> <YRTHM8qN6B3W9mRE@Air-de-Roger> <0FD46B61-6556-4912-814F-4A26988CC23E@gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Thu, Aug 12, 2021 at 03:52:55PM +0200, Lizbeth Mutterhunt, Ph.D wrote: > > > > Op 12 aug. 2021, om 09:01 heeft Roger Pau Monné <royger@freebsd.org> het volgende geschreven: > > > > Adding the freebsd-xen mailing list again. > > > > On Wed, Aug 11, 2021 at 12:48:55AM +0200, Lizbeth Mutterhunt, Ph.D wrote: > >> Op Tuesday, 10 August 2021 15:32:45 CEST schreef u: > >>> On Tue, Aug 10, 2021 at 02:41:34PM +0200, lizbethmutterhunt@gmail.com > >> wrote: > >>>> Op Tuesday, 10 August 2021 09:38:58 CEST schreef u: > >>>>> On Mon, Aug 09, 2021 at 05:23:27PM +0200, lizbethmutterhunt@gmail.com > >> wrote: > >>>>>> could someone pleas check this link: > >>>>>> > >> https://forums.freebsd.org/threads/xen-kernel-doesnt-start-at-all.8155 > >>>>>> 6/ > >>>>>> > >>>>>> does anyone has another idea then duplicating CURRENT and RELEASE > >> via > >>>>>> Virtualbox or qemu? > >>>>>> > >>>>>> XEN simply doesn't boot after setting xen_kernel on in > >>>>>> /boot/loader.conf, > >>>>>> we tried different ways but none worked. It's loading [text], > >> [data], > >>>>>> [syms] and the preconfig but afterwards there's just the > >> reset-button > >>>>>> option, because XEN doesn't boot. > >>>>>> > >>>>>> any help appreciated! > >>>>> > >>>>> Hello, > >>>> > >>>> hello royger! > >> hija! > >> > Hello Roger! > > >>>> > >>>>> There are a couple of things to look at, first of all, do you have a > >>>>> serial console attached to the box? > >>>> > >>>> I guess so, because there are two possibilities to start from via > >> primary > >>>> and secodary console! > >>> > >>> The serial console is a port (usually a RS-232) on your box that you > >>> attach a cable to and connect to another computer, so you can get > >>> early text debug output: > >>> > >>> https://www.computerhope.com/jargon/s/serial-console.htm > >>> https://tldp.org/HOWTO/Remote-Serial-Console-HOWTO/intro-why.html > >> Basically I know the RS-232 "live" in the 80s, and I was soldering a earth- > >> cable to connect two PCs without any swith via a deviate of Midnight > >> Commander. So first thought, enable serial port in bios; computer crashing > >> at > >> xen and crashes when allocating the re0. so disabled again! > > > > I 'm afraid I'm a bit lost here, so your computer does have some kind > > of serial port? > > No, no RS-232 output of course but a parallel and serial console in the BIOS! I activated the serial port and got in troubles with booting; beasties logo has been disabled, so no boot menu to unset the xen_xernel at boot prompt. XEN never booted anyway. > > > Do you mean that when you enable the serial port in BIOS (I assume a > > Serial Over LAN) > Yup! > > the re0 network interface stops working. > Yes, at the dhclient allocations it stops immediately with no output or debugger info at all. Also the keyboard was disabled and I couldn’t press CTRL+C for avoiding DHCPREQUEST. I think it would be better to get Xen out of the picture here, and initially focus on getting a serial console working with plain FreeBSD. Once you have that it should be trivial to attempt to boot Xen and get the output on the serial, but first you need to have it working properly with plain FreeBSD. The handbook contains a good section about how to get it working: https://docs.freebsd.org/en/books/handbook/serialcomms/#serialconsole-setup But it seems like you will need some help from your hardware vendor in order to figure out how to enable Serial Over LAN properly on the firmware. Note that you should be able to get the output of both the FreeBSD loader and kernel on the serial console. Regards, Roger.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?YRVQHmzo5c7Tq3Dn>