https://bugzilla.kernel.org/show_bug.cgi?id=30402

--- Comment #3 from Joerg Roedel <j...@8bytes.org> ---
(In reply to Jidong Xiao from comment #2)
> Joerg, how do you know this?
> 
> "Some investigation showed that this kernel uses MMX instructions to access
> MMIO regions. These instructions are not emulated by the instruction
> emulator and need to be added there."

AFAIR the stack-trace and instruction pointer of the crashing kernel pointed to
an MMX instruction and the kernel was trying to access an MMIO region.

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