On Fri, Feb 02, 2024 at 10:54:20AM +0100, Helge Deller wrote:
> Hi Guenter,
>
> On 2/2/24 05:22, Guenter Roeck wrote:
> > On Sat, Jan 13, 2024 at 06:57:20AM +0100, del...@kernel.org wrote:
> > > From: Helge Deller <del...@gmx.de>
> > >
> > > Recognize the qemu --nodefaults option, which will disable the
> > > following default devices on hppa:
> > > - lsi53c895a SCSI controller,
> > > - artist graphics card,
> > > - LASI 82596 NIC,
> > > - tulip PCI NIC,
> > > - second serial PCI card,
> > > - USB OHCI controller.
> > >
> > > Adding this option is very useful to allow manual testing and
> > > debugging of the other possible devices on the command line.
> > >
> >
> > With this patch in the tree, I get some interesting crashes in Seabios
> > if I provide a somewhat unusual command line option. For example,
> > something like
> >
> > -usb -device usb-ehci,id=ehci \
> > -device usb-uas,bus=ehci.0,id=uas \
> > -device scsi-hd,bus=uas.0,scsi-id=0,lun=0,drive=d0 \
> > -drive file= ...
> >
> > is accepted as command line option but results in
> >
> > SeaBIOS PA-RISC 32-bit Firmware Version 15 (QEMU 8.2.1)
> > Duplex Console IO Dependent Code (IODC) revision 1
> > ------------------------------------------------------------------------------
> > (c) Copyright 2017-2024 Helge Deller <del...@gmx.de> and SeaBIOS
> > developers.
> > ------------------------------------------------------------------------------
> > Processor Speed State Coprocessor State Cache
> > Size
> > --------- -------- --------------------- -----------------
> > ----------
> > 0 250 MHz Active Functional 0 KB
> > 1 250 MHz Idle Functional 0 KB
> > 2 250 MHz Idle Functional 0 KB
> > 3 250 MHz Idle Functional 0 KB
> > Emulated machine: HP C3700 (64-bit PA2.0) with 32-bit PDC
> > Available memory: 1024 MB
> > Good memory required: 16 MB
> > Primary boot path: FWSCSI.0.0
> > Alternate boot path: FWSCSI.0.0
> > Console path: SERIAL_2.9600.8.none
> > Keyboard path: SERIAL_2.9600.8.none
> > *ERROR* in SeaBIOS-hppa-v15:
> > prepare_boot_path:2898
> > SeaBIOS wants SYSTEM HALT.
> >
> > This is without --nodefaults, and it used to work. Is that intentional ?
>
> This should now be fixed in the upcoming SeaBIOS-hppa-v16 version ("devel"
> branch):
> https://github.com/hdeller/seabios-hppa/tree/devel
> Could you test?
I was able to build from the 'master' branch, but 'devel' gives me
hppa64-linux-ld: target elf32-hppa-linux not found
Do you have a binary seabios image, by any chance ?
> If it doesn't work, please give me the full command line.
>
qemu-system-hppa -M C3700 -smp 4 \
-kernel vmlinux -no-reboot -snapshot \
-usb -device usb-ehci,id=ehci \
-device usb-uas,bus=ehci.0,id=uas \
-device scsi-hd,bus=uas.0,scsi-id=0,lun=0,drive=d0 \
-drive file=rootfs.ext2,if=none,format=raw,id=d0 \
-append "root=/dev/sda rootwait console=ttyS0,115200" \
-nographic -monitor null
This is with qemu 8.2.1. Note that the number of CPUs doesn't make a
difference. It turns out this also crashes/aborts immediately with
"nodefaults".
> > If I do use the --nodefaults parameter, I was unable to figure out how
> > to configure the serial console. What command line parameter(s) do I need to
> > get it ?
>
> You need to add:
> -serial mon:stdio
> This will create a serial port if it's not yet there.
>
And there was me trying all variants of "-device pci-serial-4x..." I could
think of ;-).
Guenter
