[Qemu-devel] ppc64 TCG emulation broken

[Bharata B Rao]

Hi,

I am observing a kernel crash with ppc64 TCG guest on x86 and git
bisect points to this commit:

e7b1e06fbcb81ac66e2586214a6c42fdf15fadf3
[target-ppc: add vector insert instructions]

I hit the following guest kernel panic during boot:

         Starting Switch Root...
[   76.632260] systemd-journald[113]: Received SIGTERM from PID 1 (systemd).
[   77.082688] systemd-cgroups[1143]: unhandled signal 4 at
00003fff85d3d718 nip 00003fff85d3d718 lr 00003fff85c8c274 code 30001
[   77.479368] systemd-coredum[1144]: unhandled signal 4 at
00003fff948bd718 nip 00003fff948bd718 lr 00003fff9480c274 code 30001
[   77.479860] audit_printk_skb: 39 callbacks suppressed
[   77.479988] audit: type=1701 audit(1475132719.390:35):
auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=1144
comm="systemd-coredum" exe="/usr/lib/systemd/systemd-coredump" sig=4
[   77.485034] Process 1144(systemd-coredum) has RLIMIT_CORE set to 1
[   77.485156] Aborting core
[   77.858307] systemd[1]: unhandled signal 4 at 00003fff9a48d718 nip
00003fff9a48d718 lr 00003fff9a3dc274 code 30001
[   77.858868] audit: type=1701 audit(1475132719.770:36):
auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=1
comm="systemd" exe="/usr/lib/systemd/systemd" sig=4
[   78.004191] systemd-coredum[1145]: unhandled signal 4 at
00003fffa475d718 nip 00003fffa475d718 lr 00003fffa46ac274 code 30001
[   78.004648] audit: type=1701 audit(1475132719.910:37):
auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=1145
comm="systemd-coredum" exe="/usr/lib/systemd/systemd-coredump" sig=4
[   78.004971] Process 1145(systemd-coredum) has RLIMIT_CORE set to 1
[   78.005066] Aborting core
[   78.015142] Kernel panic - not syncing: Attempted to kill init!
exitcode=0x00000084
[   78.015142]
[   78.016926] CPU: 0 PID: 1 Comm: systemd Not tainted 4.6.4-301.fc24.ppc64 #1
[   78.017726] Call Trace:
[   78.019154] [c00000007e6638d0] [c0000000009df0f0]
.dump_stack+0xa8/0xe8 (unreliable)
[   78.022485] [c00000007e663960] [c0000000009dd6bc] .panic+0x12c/0x2fc
[   78.022631] [c00000007e663a00] [c0000000000cd6a8] .do_exit+0xca8/0xcb0
[   78.022735] [c00000007e663ae0] [c0000000000cd77c] .do_group_exit+0x5c/0xf0
[   78.022815] [c00000007e663b70] [c0000000000dd4ec] .get_signal+0x3bc/0x770
[   78.022918] [c00000007e663c70] [c00000000001761c] .do_signal+0x4c/0x2a0
[   78.023021] [c00000007e663db0] [c000000000017a4c] .do_notify_resume+0xac/0xc0
[   78.023411] [c00000007e663e30] [c000000000009944]
.ret_from_except_lite+0x70/0x74
[   78.077889] ---[ end Kernel panic - not syncing: Attempted to kill
init! exitcode=0x00000084

Regards,
Bharata.
-- 
http://raobharata.wordpress.com/