> I have both a MPC8548 SBC and MPC8572 system that are running different > flavors of the same Linux - 2.6.23. > > I explicitly am turning it on very early on.
Where are you turning this on? In the appication? > Later, I have an application that is compiled with SPE instructions > (e.g.: evstdd) , and there is where the problems happen. What is the problem? > If I explicitly make sure there are NO SPE instructions in the > application, nothing bad happens! > > I am polling the MSR - and it seems the SPE is turned OFF? You are polling MSR in your application? Anyway, this is expected. We do lazy restore of these registers after a context switch. So the SPE bit in the MSR may not be set if no SPE instructions have run since the last context switch. > What have I done wrong and/or has there been fixes in later kernels that > I should be aware of that might help this issue? I'm not clear what the problem is. You've just said "problems happen" when you include SPE instructions. Are you getting a SIGILL or some other signal? Is your program terminating. Can you get a GDB back-trace or dump of which instruction is causing the "problem". Mikey _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
