> I wonder why a kernel configured for E500 and compiled by a E500-specific gcc > triggers this message. Is it invalid to use SPE instructions in the kernel > or do I misunderstand the message ?
I think it's like floating point/altivec, we don't always save the FP registers on kernel/userspace transitions and so have to explicitly save them to use them in the kernel, otherwise we'd clobber the userspace register state. I guess there's something like kernel_enter_spe()? johannes
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