Re: [Qemu-devel] [PATCH 0/5] nvram: Refactor OpenBIOS NVRAM code to support -prom-env on pseries, too

[David Gibson <david@gibson.dropbear.id.au>]

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On Mon, Oct 24, 2016 at 12:36:05PM +0200, Thomas Huth wrote:
> On 24.10.2016 12:22, Bharata B Rao wrote:
> > 
> > On Wed, Oct 19, 2016 at 7:46 AM, David Gibson
> > <david@gibson.dropbear.id.au <mailto:david@gibson.dropbear.id.au>> wrote:
> > 
> >     On Tue, Oct 18, 2016 at 10:46:39PM +0200, Thomas Huth wrote:
> >     > The OpenBIOS NVRAM set-up is based on the layout defined in the CHRP
> >     > (Common Hardware Reference Platform) specification. This is the same
> >     > layout that is also used by the PAPR specification and thus by the
> >     SLOF
> >     > firmware of the pseries machine. By refactoring the NVRAM code from
> >     > mac_nvram.c, we can use the same functions for setting up the NVRAM
> >     > for both, OpenBIOS and SLOF. This way we can support the "-prom-env"
> >     > parameter of QEMU for SLOF, too, which is very useful to influence
> >     > the firmware boot process.
> >     >
> >     > Thomas Huth (5):
> >     >   nvram: Introduce helper functions for CHRP "system" and "free space"
> >     >     partitions
> >     >   sparc: Use the new common NVRAM functions for system and free space
> >     >     partition
> >     >   spapr_nvram: Pre-initialize the NVRAM to support the -prom-env
> >     >     parameter
> >     >   nvram: Move the remaining CHRP NVRAM related code to chrp_nvram.[ch]
> >     >   nvram: Rename openbios_firmware_abi.h into sun_nvram.h
> >     >
> >     >  hw/nvram/Makefile.objs                             |  1 +
> >     >  hw/nvram/chrp_nvram.c                              | 85
> >     ++++++++++++++++++++++
> >     >  hw/nvram/mac_nvram.c                               | 49 +++----------
> >     >  hw/nvram/spapr_nvram.c                             |  6 ++
> >     >  hw/sparc/sun4m.c                                   | 35 ++-------
> >     >  hw/sparc64/sun4u.c                                 | 35 ++-------
> >     >  include/hw/nvram/chrp_nvram.h                      | 54
> >     ++++++++++++++
> >     >  .../nvram/{openbios_firmware_abi.h => sun_nvram.h} | 47 +-----------
> >     >  tests/postcopy-test.c                              |  8 +-
> >     >  9 files changed, 179 insertions(+), 141 deletions(-)
> >     >  create mode 100644 hw/nvram/chrp_nvram.c
> >     >  create mode 100644 include/hw/nvram/chrp_nvram.h
> >     >  rename include/hw/nvram/{openbios_firmware_abi.h => sun_nvram.h}
> >     (50%)
> > 
> >     Series,
> > 
> >     Reviewed-by: David Gibson <david@gibson.dropbear.id.au
> >     <mailto:david@gibson.dropbear.id.au>>
> > 
> >     I've put it into ppc-for-2.8 tentatively.  However I'd like to get an
> >     Acked-by from Mark for the Sparc bits before I send my next pull
> >     request.
> > 
> > 
> > I observe an early boot failure in SLOF with a commit from this patchset
> > on ppc-for-2.8 branch.
> > 
> > 4e1257ed41bce16baa8a010 - spapr_nvram: Pre-initialize the NVRAM to
> > support the -prom-env parameter
> > 
> > SLOF **********************************************************************
> > QEMU Starting
> >  Build Date = Oct 19 2016 09:58:38
> >  FW Version = git-efd65f49929d7db7
> >  Press "s" to enter Open Firmware.
> > 
> > Populating /vdevice methods
> > Populating /vdevice/vty@71000000
> > Populating /vdevice/nvram@71000001
> > Populating /vdevice/v-scsi@71000002
> >        SCSI: Looking for devices
> >           8200000000000000 CD-ROM   : "QEMU     QEMU CD-ROM      2.5+"
> > Populating /pci@800000020000000
> >                      00 1000 (D) : 1033 0194    serial bus [ usb-xhci ]
> >                      00 0800 (D) : 1af4 1001    virtio [ block ]
> >                      00 0000 (D) : 1af4 1000    virtio [ net ]
> > Scanning USB
> >   XHCI: Initializing
> > Using default console: /vdevice/vty@71000000
> >     
> >   Welcome to Open Firmware
> > 
> >   Copyright (c) 2004, 2011 IBM Corporation All rights reserved.
> >   This program and the accompanying materials are made available
> >   under the terms of the BSD License available at
> >   http://www.opensource.org/licenses/bsd-license.php
> > 
> > 
> > Trying to load:  from: /pci@800000020000000/scsi@1 ...   Successfully loaded
> > error: out of memory.
> > out of memory
> > Aborted. Press any key to exit.
> 
> Yuck. Confirmed. Sorry for the inconvenience. Seems like SLOF does not
> create the properties in the /options device tree node anymore in this case.
> 
> David, could you please unqueue the "spapr_nvram: Pre-initialize the
> NVRAM to support the -prom-env parameter" patch from the ppc-for-2.8
> branch until I figure out a fix for this problem? Thanks!

Done.

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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