Nathan Lynch writes: > Some IBM POWER-based platforms have the ability to run in a > mode which mostly appears to the OS as a different processor from the > actual hardware. For example, a Power6 system may appear to be a > Power5+, which makes the AT_PLATFORM value "power5+". > > However, some applications (virtual machines, optimized libraries) can > benefit from knowledge of the underlying CPU model. A new aux vector > entry, AT_BASE_PLATFORM, will denote the actual hardware. For > example, on a Power6 system in Power5+ compatibility mode, AT_PLATFORM > will be "power5+" and AT_BASE_PLATFORM will be "power6".
Why on earth would you ever want AT_PLATFORM to differ from AT_BASE_PLATFORM? In cases that matter you admit that AT_BASE_PLATFORM takes precedence, so why involve a fake lame not-quite-the-platform in the first place? Workaround for buggy software? _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
