I've been looking at PowerISA_Public.pdf that I downloaded from some ppc site. It describes various things as "need not be supported on all implementations", for example the MSR_BE bit. Is there a generic way to detect if such a feature is supported, or a known table of models that support features, or what?
Right now I'm considering MSR_BE (branch tracing). I have a patch to use this (arch_has_block_step, enabling a PTRACE_SINGLEBLOCK). The only machine handy to test is a Mac G5 (PPC970FX, 3.0 (pvr 003c 0300)). I know this chip supports MSR_BE. But that's only because I wrote an affirmative test case and tried it and saw it work right. Before submitting the kernel changes, I want to get the CPU model conditionalization correct (a runtime check on some feature bit mask is fine here, if CONFIG_* alone does not indicate for sure). Thanks, Roland _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
