igt@kms_flip_tiling@flip-changes-tiling - incomplete - Kernel panic - not syncing: DMAR hardware is malfunctioning

https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_447/fi-icl-u2/igt@kms_flip_tiling@flip-changes-tiling.html https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_447/filelist.html->fi-icl-u2/pstore5-1583663114_Panic_1.log

<7>[ 1231.487822] [drm:intel_ddi_get_config [i915]] [ENCODER:214:DDI A] Fec status: 0
<7>[ 1231.487915] i915 0000:00:02.0: [drm:verify_single_dpll_state.isra.149 [i915]] DPLL 0
<7>[ 1231.488281] i915 0000:00:02.0: [drm:verify_connector_state [i915]] [CONNECTOR:238:HDMI-A-2]
<7>[ 1231.488418] i915 0000:00:02.0: [drm:intel_atomic_commit_tail [i915]] [CRTC:152:pipe B]
<7>[ 1231.488721] i915 0000:00:02.0: [drm:verify_single_dpll_state.isra.149 [i915]] MG PLL 1
<7>[ 1231.489093] i915 0000:00:02.0: [drm:verify_connector_state [i915]] [CONNECTOR:242:DP-2]
<7>[ 1231.489222] i915 0000:00:02.0: [drm:intel_atomic_commit_tail [i915]] [CRTC:213:pipe C]
<7>[ 1231.489574] [drm:intel_ddi_get_config [i915]] [ENCODER:241:DDI D] Fec status: 0
<7>[ 1231.489656] i915 0000:00:02.0: [drm:verify_single_dpll_state.isra.149 [i915]] MG PLL 2
<6>[ 1231.928222] NetworkManager (556) used greatest stack depth: 11232 bytes left
<7>[ 1234.497381] i915 0000:00:02.0: [drm:edp_panel_vdd_off_sync [i915]] Turning [ENCODER:214:DDI A] VDD off
<7>[ 1234.497669] i915 0000:00:02.0: [drm:edp_panel_vdd_off_sync [i915]] PP_STATUS: 0x80000008 PP_CONTROL: 0x00000067
<2>[ 1240.547665] watchdog: watchdog0: watchdog did not stop!
<4>[ 1240.552077] printk: systemd-shutdow: 31 output lines suppressed due to ratelimiting
<30>[ 1240.569046] systemd-shutdown[1]: Syncing filesystems and block devices.
<30>[ 1240.616638] systemd-shutdown[1]: Sending SIGTERM to remaining processes...
<46>[ 1240.636460] systemd-journald[269]: Received SIGTERM from PID 1 (systemd-shutdow).
<30>[ 1240.645978] systemd-shutdown[1]: Sending SIGKILL to remaining processes...
<30>[ 1240.659115] systemd-shutdown[1]: Hardware watchdog 'Software Watchdog', version 0
<30>[ 1240.661475] systemd-shutdown[1]: Unmounting file systems.
<6>[ 1240.676686] EXT4-fs (nvme0n1p2): re-mounted. Opts: errors=panic
<30>[ 1240.690948] systemd-shutdown[1]: All filesystems unmounted.
<30>[ 1240.690962] systemd-shutdown[1]: Deactivating swaps.
<30>[ 1240.691249] systemd-shutdown[1]: All swaps deactivated.
<30>[ 1240.691255] systemd-shutdown[1]: Detaching loop devices.
<30>[ 1240.691407] systemd-shutdown[1]: All loop devices detached.
<6>[ 1241.875948] e1000e: EEE TX LPI TIMER: 00000011
<7>[ 1241.992205] i915 0000:00:02.0: [drm:i915_hdcp_component_unbind [i915]] I915 HDCP comp unbind
<0>[ 1242.636204] reboot: Restarting system with command 'now'
<5>[ 1242.637323] reboot: machine restart
<0>[ 1252.640581] Kernel panic - not syncing: DMAR hardware is malfunctioning
<0>[ 1252.641478] Kernel Offset: 0x20000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
<4>[ 1252.642246] CPU: 0 PID: 1 Comm: systemd-shutdow Tainted: G     U            5.6.0-rc4-g11bf0a4335d2-drmtip_447+ #1
<4>[ 1252.642929] Hardware name: Intel Corporation Ice Lake Client Platform/IceLake U DDR4 SODIMM PD RVP TLC, BIOS ICLSFWR1.R00.3183.A00.1905020411 05/02/2019
<4>[ 1252.643630] Call Trace:
<4>[ 1252.644315]  dump_stack+0x71/0x9b
<4>[ 1252.644996]  panic+0x132/0x2d3
<4>[ 1252.645676]  iommu_disable_translation+0x7b/0x80
<4>[ 1252.646357]  intel_iommu_shutdown+0x75/0x90
<4>[ 1252.647035]  native_machine_restart+0x22/0x40
<4>[ 1252.647725]  __do_sys_reboot+0x184/0x1f0
<4>[ 1252.648408]  ? task_work_run+0x6e/0xb0
<4>[ 1252.649091]  ? lockdep_hardirqs_off+0x79/0xd0
<4>[ 1252.649781]  ? trace_hardirqs_off_thunk+0x1a/0x1c
<4>[ 1252.650467]  do_syscall_64+0x4f/0x240
<4>[ 1252.651156]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4>[ 1252.651851] RIP: 0033:0x7fb79346e839
<4>[ 1252.652538] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 1f f6 2c 00 f7 d8 64 89 01 48
<4>[ 1252.653318] RSP: 002b:00007fff2b36bef8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a9
<4>[ 1252.654095] RAX: ffffffffffffffda RBX: 00005566344be040 RCX: 00007fb79346e839
<4>[ 1252.654872] RDX: 00000000a1b2c3d4 RSI: 0000000028121969 RDI: 00000000fee1dead
<4>[ 1252.655653] RBP: 00007fff2b36bf60 R08: 0000000000000000 R09: 00007fff2b36c000
<4>[ 1252.656443] R10: 00005566344be040 R11: 0000000000000246 R12: 00007fff2b36bf68
<4>[ 1252.657235] R13: 0000000000000000 R14: 0000001b00000004 R15: 00007fff2b36c258