[Qemu-ppc] qtest tmp105-test endianness issue

[Andreas Färber]

Hello,

I've found that my tmp105-test fails on Mac OS X ppc(64), i.e. Little
Endian arm-softmmu target and Big Endian host:

GTESTER check-qtest-arm
mipid_reset: Display off
**
ERROR:/Users/andreas/QEMU/qemu/tests/libi2c-imap.c:163:omap_i2c_create:
assertion failed (data == 0x34): (0x00003400 == 0x00000034)

The only other test case that uses memread() is m48t59-test, which uses
size 1 MMIO accesses only. This suggests that Big Endian guest (e.g.,
sparc) and Little Endian host (e.g., x86_64) may cause issues, too.

What is the expected way to handle endianness in qtest? Should
qtest.c:qtest_process_command() be changed? libqtest.c:qtest_memread()?
Or the test itself byteswap and, if so, under which circumstances?

Regards,
Andreas