On 07/11/2016 09:41 PM, Mark Cave-Ayland wrote:
On 11/07/16 16:18, Marcel Apfelbaum wrote:
On 07/11/2016 05:42 PM, Leon Alrae wrote:
Hi,
This commit causes regressions in my MIPS tests. QEMU segfaults when
booting Linux on Malta board;
Hi Leon,
Is a good thing you caught it in the pull request, thanks!
Is a pity we don't have a way to run sanity tests on all archs (beyond
make check)
this can be easily reproduced with
Aurelien's Debian images:
wget
https://people.debian.org/~aurel32/qemu/mipsel/vmlinux-3.2.0-4-5kc-malta
wget
https://people.debian.org/~aurel32/qemu/mipsel/debian_wheezy_mipsel_standard.qcow2
qemu-system-mips64el -M malta -kernel vmlinux-3.2.0-4-5kc-malta -hda
debian_wheezy_mipsel_standard.qcow2 -append "root=/dev/sda1
console=ttyS0" -nographic
I'll reproduce and handle it, thanks!
Marcel
FWIW this looks like the exact same backtrace I reported with
qemu-system-sparc64 so hopefully the solution should fix both problems :)
Hi Mark and Leon,
I've reproduced both failures and I've found the root cause.
The PCI root bus is not realized as part of the machine initialization.
Until now the only consequence was the machine couldn't be migrated
(because the vmstate is initialized as part of 'realize').
However, from now on the devices cannot do DMA requests if the bus is not
'realized'.
It took some time because I had to go over all the archs and check this issue.
I have the patches ready, I am running some more tests and post them soon.
Thanks for the patience,
Marcel
ATB,
Mark.
