[Bug 81701] [BDW Regression]igt/gem_reset_stats some subcases cause "[drm:hsw_unclaimed_reg_detect] *ERROR* Unclaimed register detected. Please use the i915.mmio_debug=1 to debug this problem."

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81701

--- Comment #2 from Guo Jinxian <jinxianx.guo at intel.com> ---
Created attachment 103418
  --> https://bugs.freedesktop.org/attachment.cgi?id=103418&action=edit
dmesg with i915.mmio_debug=1

(In reply to comment #1)
> Can you please boot with i915.mmio_debug=1, reproduce the bug and attach the
> log here?

root at x-bdw05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./gem_reset_stats
--run-subtest reset-stats-ctx-render
IGT-Version: 1.7-gbffef22 (x86_64) (Linux:
3.16.0-rc6_drm-intel-nightly_089bea_20140725_debug+ x86_64)
Subtest reset-stats-ctx-render: SUCCESS
root at x-bdw05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# dmesg -r|egrep
"<[1-4]>"|grep drm            <4>[   90.246324] WARNING: CPU: 0 PID: 0 at
drivers/gpu/drm/i915/intel_uncore.c:528
hsw_unclaimed_reg_debug.isra.11+0x6c/0x7e [i915]()
<4>[   90.246328] Modules linked in: dm_mod iTCO_wdt iTCO_vendor_support
snd_hda_codec_hdmi pcspkr i2c_i801 snd_hda_intel snd_hda_controller
snd_hda_codec snd_hwdep snd_pcm ppdev lpc_ich mfd_core snd_timer snd soundcore
battery parport_pc parport ac acpi_cpufreq joydev i915 button video
drm_kms_helper drm
<4>[   90.246350] CPU: 0 PID: 0 Comm: swapper/0 Not tainted
3.16.0-rc6_drm-intel-nightly_089bea_20140725_debug+ #790
<4>[   90.246614] WARNING: CPU: 0 PID: 0 at
drivers/gpu/drm/i915/intel_uncore.c:528
hsw_unclaimed_reg_debug.isra.11+0x6c/0x7e [i915]()
<4>[   90.246617] Modules linked in: dm_mod iTCO_wdt iTCO_vendor_support
snd_hda_codec_hdmi pcspkr i2c_i801 snd_hda_intel snd_hda_controller
snd_hda_codec snd_hwdep snd_pcm ppdev lpc_ich mfd_core snd_timer snd soundcore
battery parport_pc parport ac acpi_cpufreq joydev i915 button video
drm_kms_helper drm
<4>[   90.246636] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G        W    
3.16.0-rc6_drm-intel-nightly_089bea_20140725_debug+ #790
<4>[   96.245471] WARNING: CPU: 2 PID: 0 at
drivers/gpu/drm/i915/intel_uncore.c:528
hsw_unclaimed_reg_debug.isra.11+0x6c/0x7e [i915]()
<4>[   96.245482] Modules linked in: dm_mod iTCO_wdt iTCO_vendor_support
snd_hda_codec_hdmi pcspkr i2c_i801 snd_hda_intel snd_hda_controller
snd_hda_codec snd_hwdep snd_pcm ppdev lpc_ich mfd_core snd_timer snd soundcore
battery parport_pc parport ac acpi_cpufreq joydev i915 button video
drm_kms_helper drm
<4>[   96.245517] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G        W    
3.16.0-rc6_drm-intel-nightly_089bea_20140725_debug+ #790
<4>[   96.245865] WARNING: CPU: 2 PID: 0 at
drivers/gpu/drm/i915/intel_uncore.c:528
hsw_unclaimed_reg_debug.isra.11+0x6c/0x7e [i915]()
<4>[   96.245875] Modules linked in: dm_mod iTCO_wdt iTCO_vendor_support
snd_hda_codec_hdmi pcspkr i2c_i801 snd_hda_intel snd_hda_controller
snd_hda_codec snd_hwdep snd_pcm ppdev lpc_ich mfd_core snd_timer snd soundcore
battery parport_pc parport ac acpi_cpufreq joydev i915 button video
drm_kms_helper drm
<4>[   96.245915] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G        W    
3.16.0-rc6_drm-intel-nightly_089bea_20140725_debug+ #790
<4>[  102.248571] WARNING: CPU: 2 PID: 0 at
drivers/gpu/drm/i915/intel_uncore.c:528
hsw_unclaimed_reg_debug.isra.11+0x6c/0x7e [i915]()
<4>[  102.248579] Modules linked in: dm_mod iTCO_wdt iTCO_vendor_support
snd_hda_codec_hdmi pcspkr i2c_i801 snd_hda_intel snd_hda_controller
snd_hda_codec snd_hwdep snd_pcm ppdev lpc_ich mfd_core snd_timer snd soundcore
battery parport_pc parport ac acpi_cpufreq joydev i915 button video
drm_kms_helper drm
<4>[  102.248617] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G        W    
3.16.0-rc6_drm-intel-nightly_089bea_20140725_debug+ #790
<4>[  102.248946] WARNING: CPU: 2 PID: 0 at
drivers/gpu/drm/i915/intel_uncore.c:528
hsw_unclaimed_reg_debug.isra.11+0x6c/0x7e [i915]()
<4>[  102.248954] Modules linked in: dm_mod iTCO_wdt iTCO_vendor_support
snd_hda_codec_hdmi pcspkr i2c_i801 snd_hda_intel snd_hda_controller
snd_hda_codec snd_hwdep snd_pcm ppdev lpc_ich mfd_core snd_timer snd soundcore
battery parport_pc parport ac acpi_cpufreq joydev i915 button video
drm_kms_helper drm
<4>[  102.249002] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G        W    
3.16.0-rc6_drm-intel-nightly_089bea_20140725_debug+ #790

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