I'm new to PMU development, I'm curious about the following question about PMU:
1) I have read IA32_MISC_ENABLE MSR and the bit always is zero , but the bit always set, what does it mean? The CPU is supported PEBS or not supported??
2) Does PEBS provided the functionality that can trap all of branch , such as , syscall ? what is the basic step for doing this?
3) without PEBS , I tired to set a PMC0 with Ia32PerfEvtseL0 , and set the PMC0 to be negative number , however, the PMI doesn't happened... why is that..??
4) I have do a following setting , but there is not PMI generated
CPU Model : 60
where g_Event is 0xC2 and g_mask is 1
Thank you :)