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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [radeonsi] radeon 0000:01:00.0: Packet0 not allowed!"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84500#c7">Comment # 7</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [radeonsi] radeon 0000:01:00.0: Packet0 not allowed!"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84500">bug 84500</a>
from <span class="vcard"><a class="email" href="mailto:michel@daenzer.net" title="Michel Dänzer <michel@daenzer.net>"> <span class="fn">Michel Dänzer</span></a>
</span></b>
<pre><span class="quote">> [25322.031213] 0x0000000b</span >
This value is written to the R_028A3C_VGT_GROUP_VECT_1_FMT_CNTL register.
However, the driver only ever writes 0 to that register, in si_init_config().
<span class="quote">> [25322.031214] 0x00000000 <---
> [25322.031215] 0x00000295
> [25322.031215] 0x00000080
> [25322.031216] 0x00000040
> [25322.031217] 0x00000002</span >
The values after the arrow look like the following series of register writes to
R_028A54_VGT_GS_PER_ES and the two following registers.
So, it looks like the value for the R_028A3C_VGT_GROUP_VECT_1_FMT_CNTL register
and the following PKT3_SET_CONTEXT_REG header were scribbled over with the
value 0x0000000b00000000. Looks like memory corruption to me.
Running firefox in valgrind or with something like the GCC / clang address
sanitizers might give a clue, but might be painful.</pre>
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