qemu 2.7.x 2.8 softmmu dont work on BE machine

[luigiburdo]

Build on Be machine qemu 2.7.1 and 2.8 in pure softmmu (tgc) dont work on big endian hardware .
tested with ppc-softmmu,i386-softmmu,arm-softmmu same result:

with :
 ./qemu-system-i386
Gtk-Message: Failed to load module "overlay-scrollbar"
qemu-system-i386: Trying to execute code outside RAM or ROM at 0x000a0000
This usually means one of the following happened:

(1) You told QEMU to execute a kernel for the wrong machine type, and it crashed on startup (eg trying to run a raspberry pi kernel on a versatilepb QEMU machine)
(2) You didn't give QEMU a kernel or BIOS filename at all, and QEMU executed a ROM full of no-op instructions until it fell off the end
(3) Your guest kernel has a bug and crashed by jumping off into nowhere

This is almost always one of the first two, so check your command line and that you are using the right type of kernel for this machine.
If you think option (3) is likely then you can try debugging your guest with the -d debug options; in particular -d guest_errors will cause the log to include a dump of the guest register state at this point.

Execution cannot continue; stopping here.

I try to add the -L option with ../pc-bios/bios.bin
and have the same result.

note the ppc-softmmu and ppc64-softmmu work in kvm mode only emulated mode have issue.

tested on my hardware a Qriq P5040 and G5 4x970MP with Ubuntu Mate 16.10
thanks
Luigi

[Thomas Huth (th-huth)]

I can not reproduce this issue. QEMU 2.8 works fine here on a POWER8 big endian host (running RHEL7). Can you still run older versions of QEMU that used to work for you in the past, to check whether it is QEMU or whether it is Ubuntu 16.10 that is causing the trouble here? Could you please also post the full output of the "configure" run on your system?

[Thomas Huth (th-huth)]

Something else to try: Could you please check whether you get any output when you run "qemu-system-ppc -nographic" on your system? So we can make sure that it is not related to GTK or something similar...

[luigiburdo (intermediadc)]

Hi Thomas,
here the configure .. i made a clean one just with the target for have fastest build
will report soon the result with the nographic just the time of build

src/qemu$ ./configure --target-list=i386-softmmu,ppc-softmmu,ppc64-softmmu
Install prefix /usr/local
BIOS directory /usr/local/share/qemu
binary directory /usr/local/bin
library directory /usr/local/lib
module directory /usr/local/lib/qemu
libexec directory /usr/local/libexec
include directory /usr/local/include
config directory /usr/local/etc
local state directory /usr/local/var
Manual directory /usr/local/share/man
ELF interp prefix /usr/gnemul/qemu-%M
Source path /home/amigaone/src/qemu
C compiler cc
Host C compiler cc
C++ compiler c++
Objective-C compiler clang
ARFLAGS rv
CFLAGS -O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -g
QEMU_CFLAGS -I/usr/include/pixman-1 -Werror -DHAS_LIBSSH2_SFTP_FSYNC -pthread -I/usr/include/glib-2.0 -I/usr/lib/powerpc-linux-gnu/glib-2.0/include -D_GNU_SOURCE -I/usr/include/ncursesw -m32 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes -Wredundant-decls -Wall -Wundef -Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing -fno-common -fwrapv -Wendif-labels -Wno-shift-negative-value -Wmissing-include-dirs -Wempty-body -Wnested-externs -Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers -Wold-style-declaration -Wold-style-definition -Wtype-limits -fstack-protector-strong -I/usr/local/include/libpng12 -I/usr/local/include/cacard -I/usr/include/nss -I/usr/include/nspr -I/usr/include/libusb-1.0
LDFLAGS -Wl,--warn-common -m32 -g
make make
install install
python python -B
smbd /usr/sbin/smbd
module support no
host CPU ppc
host big endian yes
target list i386-softmmu ppc-softmmu ppc64-softmmu
tcg debug enabled no
gprof enabled no
sparse enabled no
strip binaries yes
profiler no
static build no
pixman system
SDL support yes (1.2.15)
GTK support yes (2.24.30)
GTK GL support no
VTE support no
TLS priority NORMAL
GNUTLS support no
GNUTLS rnd no
libgcrypt yes
libgcrypt kdf yes
nettle no
nettle kdf no
libtasn1 no
curses support yes
virgl support yes
curl support yes
mingw32 support no
Audio drivers oss
Block whitelist (rw)
Block whitelist (ro)
VirtFS support yes
VNC support yes
VNC SASL support yes
VNC JPEG support yes
VNC PNG support yes
xen support no
brlapi support yes
bluez support yes
Documentation yes
PIE no
vde support no
netmap support no
Linux AIO support yes
ATTR/XATTR support yes
Install blobs yes
KVM support yes
COLO support yes
RDMA support yes
TCG interpreter no
fdt support yes
preadv support yes
fdatasync yes
madvise yes
posix_madvise yes
libcap-ng support yes
vhost-net support yes
vhost-scsi support yes
vhost-vsock support yes
Trace backends log
spice support no
rbd support yes
xfsctl support yes
smar...

[luigiburdo (intermediadc)]

i386-softmmu:
./qemu-system-i386 -nographic
qemu-system-i386: Trying to execute code outside RAM or ROM at 0x000a0000
This usually means one of the following happened: and so and so

./qemu-system-ppc -nographic
nothing happen ... no exit on console .

on 2.6.2 i have:

qemu-system-ppc -nographic

>> =============================================================
>> OpenBIOS 1.1 [Apr 18 2016 08:20]
>> Configuration device id QEMU version 1 machine id 2
>> CPUs: 1
>> Memory: 128M
>> UUID: 00000000-0000-0000-0000-000000000000
>> CPU type PowerPC,750
milliseconds isn't unique.
Welcome to OpenBIOS v1.1 built on Apr 18 2016 08:20
Trying hd:,\\:tbxi...
Trying hd:,\ppc\bootinfo.txt...
Trying hd:,%BOOT...

note the 2.6.2 work, before on 2.6.1 i had the same issue of 2.7 and 2.8

[Cameron Kaiser (c-kaiser)]

I can reproduce the same problem on 2.7.0 on a PowerPC G5 for the x86, x86_64 and ppc softmmu targets (minus the Gtk problem, since I use this ported to Cocoa). As with Luigi this seems to be a regression from 2.6.2. There is no change with -nographic.

See also: https://bugzilla.redhat.com/show_bug.cgi?id=1332449

The commenter indicates several BE issues were detected. I have not yet heard from him regarding his patches or whether they were upstreamed here.

[luigiburdo (intermediadc)]

Oh my gosh the great Cameron Kaiser :)

[Thomas Huth (th-huth)]

Looking through old bug tickets ... can you still reproduce the issue with the latest version of QEMU (v4.2) and a more recent Linux distribution?

[Launchpad Janitor (janitor)]

[Expired for QEMU because there has been no activity for 60 days.]