On Tue, 2010-04-20 at 20:36 +0300, Pasi Kärkkäinen wrote:
> On Mon, Apr 19, 2010 at 04:56:48PM +0200, Matej Zary wrote:
> > Hello all,
> >
> > I compiled from source Xen 4.0 with the default 2.6.31.13 pv_ops dom0
> > kernel on barebone Debian Lenny installation. Problem is, this dom0 kernel
> > won't boot. First complaining about ioapic, so I tried with noioapci, still
> > no luck (the screen blackens during boot and computer reboots). :( So here
> > comes serial console. This PC is older shady Asrock nForce 430 board with
> > AMD Athlon X2 1,9 Ghz CPU => no onboard serial port. Therefore I added PCI
> > card with i/o ports.
> >
> > dmesg | grep tty
> > [ 0.004000] console [tty0] enabled
> > [ 0.923873] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> > [ 0.924008] 00:0a: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> > [ 7.887891] 0000:01:0a.0: ttyS1 at I/O 0xec00 (irq = 18) is a 16550A
> > [ 7.887891] 0000:01:0a.0: ttyS2 at I/O 0xe480 (irq = 18) is a 16550A
> >
> >
> > According to http://wiki.xensource.com/xenwiki/XenSerialConsole I used
> > usb->com cable on my laptop and tried the link test with minicom on both
> > sides - chatting worked flawlessly (using /dev/ttyS1 on "server" side).
> >
> > Problem is, I'm not able configure boot options for Xen to work with this
> > serial port. My grub menu.lst (one from many experiments):
> >
> > title Xen 4.0, Linux kernel 2.6.31.13 with serial console
> > root (hd0,0)
> > kernel /boot/xen-4.0.gz dom0_mem=512M loglvl=all guest_loglvl=all
> > com2=115200, 8n1, 0xec00, 18 console=com2
>
>
> Try this instead:
> kernel /boot/xen-4.0.gz dom0_mem=512M loglvl=all guest_loglvl=all
> com1=115200,8n1,0xec00,18 console=com1
>
> You can't have spaces between the parameters.
> dom0 kernel line looks OK.
>
> If that doesn't work then try specifying 0 as the IRQ (instead of 18).
> Also.. hmm.. I wonder if the irq should be in hex or in decimal..
Yes, only the spaces were the problem. :)
So to summarize (might be another example on
http://wiki.xensource.com/xenwiki/XenSerialConsole - at this time
there's no cfg example for additional cheap I/O ports PCI card yet):
dmesg | grep tty
[ 0.004000] console [tty0] enabled
[ 1.444943] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[ 1.445716] 00:0b: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[ 8.433667] 0000:01:0a.0: ttyS1 at I/O 0xec00 (irq = 18) is a 16550A
[ 8.433667] 0000:01:0a.0: ttyS2 at I/O 0xe480 (irq = 18) is a 16550A
lspci -vvv
01:0a.0 Communication controller: NetMos Technology PCI 9835 Multi-I/O
Controller (rev 01) (prog-if 02)
Subsystem: LSI Logic / Symbios Logic 1P2S
Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR+ FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Interrupt: pin A routed to IRQ 18
Region 0: I/O ports at ec00 [size=8]
Region 1: I/O ports at e480 [size=8]
Region 2: I/O ports at e400 [size=8]
Region 3: I/O ports at e080 [size=8]
Region 4: I/O ports at e000 [size=8]
Region 5: I/O ports at dc00 [size=16]
Kernel driver in use: parport_serial
Kernel modules: parport_serial
/boot/grub/menu.lst
title Xen 4.0, Linux kernel 2.6.31.13 with serial console
root (hd0,0)
kernel /boot/xen-4.0.gz dom0_mem=512M loglvl=all guest_loglvl=all
com1=38400,8n1,0xec00,18 console=com1
module /boot/vmlinuz-2.6.31.13 root=/dev/sda1 ro console=hvc0
earlyprintk=xen nomodeset
module /boot/initrd.img-2.6.31.13
Confusing parameters are com1=38400 and console=com1 (because the used
port is actually Com2 - ttyS1). It doesn't matter whether is there com1
or com2=38400 and console=com2, it works the same..
So again, many thanks all who tried to help.
Regards
Matej
>
> -- Pasi
>
> > module /boot/vmlinuz-2.6.31.13 root=/dev/sda1 ro console=hvc0
> > earlyprintk=xen nomodeset
> > module /boot/initrd.img-2.6.31.13
> >
> > Tried many variations, but still no luck getting the xen boot process on
> > my serial connected console.
> >
> > Any hints?
> >
> >
> > Many thanks.
> >
> > Matej
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