Hi, I noticed that when trying to boot 2.6.0-test4 in the simulator with perfmon turned on it ended up oopsing with a "General Exception: IA-64 Reserved Register/Field fault" in pfm_init_percpu() when it tried to zero out the PMD registers. I have no idea if the simulator implements perfmon support, but noticed that there are PMC and PMD registers in the register window. Am I right in saying the simulator has only 8, skipping odd registers, where mckinley has 15 PMC and 17 PMD registers? I can think of a number of things to fix it but am not sure which is correct -- the GENERIC definitions look kind of correct; maybe CONFIG_PERFMON should be turned off for HP_SIM; or create a dummy PMC/PMD register definition (attached). Any enlightenment appreciated. -i