[Bug 96836] New: Kernel unaligned access at TPC[105d9fb4] nvkm_instobj_wr32+0x14/0x20 [nouveau] - bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ

From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org
To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: [Bug 96836] New: Kernel unaligned access at TPC[105d9fb4] nvkm_instobj_wr32+0x14/0x20 [nouveau]
Date: Thu, 07 Jul 2016 02:23:25 +0000	[thread overview]
Message-ID: <bug-96836-8800@http.bugs.freedesktop.org/> (raw)

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https://bugs.freedesktop.org/show_bug.cgi?id=96836

            Bug ID: 96836
           Summary: Kernel unaligned access at TPC[105d9fb4]
                    nvkm_instobj_wr32+0x14/0x20 [nouveau]
           Product: xorg
           Version: unspecified
          Hardware: SPARC
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
          Reporter: ciaran.gillespie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org

When attempting to use Nouveau driver with Xorg on my SunBlade 2500 running the
latested build from Debian-9.0 Sid SPARC64 CPU 0 runs up to 100% and then
eventually the Xorg session shuts down. It appears that it's timing out on a
GPU lock. A bunch of messages appears in the Xorg.0.log indicating fifo:
CACH_ERROR also with in the messages log there are several repeating errors.

log_unaligned: 598 callbacks suppressed
Kernel unaligned access at TPC[105d9fb4] nvkm_instobj_wr32+0x14/0x20 [nouveau]

Eventually the Xorg session gives up and times out.

I'll try and attach some more logs but it appears to have something to do with
the iowrite32_native macro on SPARC V9 systems.

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