[Qemu-devel] qemu seabios issue with vhost-scsi

[Badari <pbadari@us.ibm.com>]

Hi,

While testing vhost-scsi in the current qemu git, ran into an earlier issue
with seabios. I had to disable scsi support in seabios to get it working.

I was hoping this issue got resolved when vhost-scsi support got
merged into qemu. Is this still being worked on ?

Thanks,
Badari

[root ~]# gdb /root/qemu/x86_64-softmmu/qemu-system-x86_64
GNU gdb (GDB) Red Hat Enterprise Linux (7.2-60.el6)
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later 
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /root/qemu/x86_64-softmmu/qemu-system-x86_64...done.
(gdb) run  --cpu qemu64 --enable-kvm  -m 4096 -drive 
file=/var/lib/libvirt/images/lnx.img,if=ide,cache=writethrough -device 
vhost-scsi-pci,wwpn=naa.6001405bd4e8476d,event_idx=off -vnc :10 -boot d
Starting program: /root/qemu/x86_64-softmmu/qemu-system-x86_64 --cpu 
qemu64 --enable-kvm  -m 4096 -drive 
file=/var/lib/libvirt/images/window.img,if=ide,cache=writethrough 
-device vhost-scsi-pci,wwpn=naa.6001405bd4e8476d,event_idx=off -vnc :10 
-boot d
warning: no loadable sections found in added symbol-file system-supplied 
DSO at 0x7ffff7ffa000
[Thread debugging using libthread_db enabled]
[New Thread 0x7ffff1c1c700 (LWP 4725)]
[New Thread 0x7ffff1239700 (LWP 4726)]
[New Thread 0x7fffeb7ff700 (LWP 4729)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff1239700 (LWP 4726)]
0x00005555556b3191 in scsi_device_find (bus=0x5555565abb50, channel=0, id=0,
     lun=0) at hw/scsi/scsi-bus.c:1744
1744        QTAILQ_FOREACH_REVERSE(kid, &bus->qbus.children, 
ChildrenHead, sibling) {
Missing separate debuginfos, use: debuginfo-install 
cyrus-sasl-gssapi-2.1.23-13.el6_3.1.x86_64 
cyrus-sasl-lib-2.1.23-13.el6_3.1.x86_64 
cyrus-sasl-md5-2.1.23-13.el6_3.1.x86_64 
cyrus-sasl-plain-2.1.23-13.el6_3.1.x86_64 db4-4.7.25-17.el6.x86_64 
glib2-2.22.5-7.el6.x86_64 glibc-2.12-1.107.el6.x86_64 
gnutls-2.8.5-10.el6.x86_64 keyutils-libs-1.4-4.el6.x86_64 
krb5-libs-1.10.3-10.el6.x86_64 libcom_err-1.41.12-14.el6.x86_64 
libcurl-7.19.7-35.el6.x86_64 libgcrypt-1.4.5-9.el6_2.2.x86_64 
libgpg-error-1.7-4.el6.x86_64 libidn-1.18-2.el6.x86_64 
libpng-1.2.49-1.el6_2.x86_64 libselinux-2.0.94-5.3.el6.x86_64 
libssh2-1.4.2-1.el6.x86_64 libtasn1-2.3-3.el6_2.1.x86_64 
ncurses-libs-5.7-3.20090208.el6.x86_64 nspr-4.9.2-1.el6.x86_64 
nss-3.14.0.0-12.el6.x86_64 nss-softokn-freebl-3.12.9-11.el6.x86_64 
nss-util-3.14.0.0-2.el6.x86_64 openldap-2.4.23-31.el6.x86_64 
openssl-1.0.0-27.el6.x86_64 pixman-0.26.2-4.el6.x86_64 
zlib-1.2.3-29.el6.x86_64
(gdb) bt
#0  0x00005555556b3191 in scsi_device_find (bus=0x5555565abb50, 
channel=0, id=
     0, lun=0) at hw/scsi/scsi-bus.c:1744
#1  0x00005555557a59f0 in virtio_scsi_device_find (vdev=0x5555565aba38, vq=
     0x5555565d1150) at /root/qemu/hw/scsi/virtio-scsi.c:56
#2  virtio_scsi_handle_cmd (vdev=0x5555565aba38, vq=0x5555565d1150)
     at /root/qemu/hw/scsi/virtio-scsi.c:376
#3  0x00005555557b3410 in access_with_adjusted_size (addr=16, value=
     0x7ffff1238b78, size=2, access_size_min=<value optimized out>,
     access_size_max=<value optimized out>, access=
     0x5555557b4b80 <memory_region_write_accessor>, opaque=0x5555565ab8f0)
     at /root/qemu/memory.c:364
#4  0x00005555557b3a3b in memory_region_iorange_write (
     iorange=<value optimized out>, offset=<value optimized out>,
     width=<value optimized out>, data=2) at /root/qemu/memory.c:439
#5  0x00005555557b29a6 in kvm_handle_io (env=0x555556520aa0)
     at /root/qemu/kvm-all.c:1485
#6  kvm_cpu_exec (env=0x555556520aa0) at /root/qemu/kvm-all.c:1634
#7  0x000055555576108e in qemu_kvm_cpu_thread_fn (arg=0x555556520aa0)
     at /root/qemu/cpus.c:759
#8  0x00007ffff6059851 in start_thread () from /lib64/libpthread.so.0
#9  0x00007ffff5da790d in clone () from /lib64/libc.so.6