On Thursday 05 November 2015 06:37 PM, Peter Zijlstra wrote: > On Thu, Nov 05, 2015 at 02:16:15AM +0530, Madhavan Srinivasan wrote: >> Second patch updates struct arch_misc_reg for arch/powerpc with pmu registers >> and adds offsetof macro for the same. It extends perf_reg_value() >> to use reg idx to decide on struct to return value from. > Why; what's in those regs?
Was out and did not have access to mail, so missed to respond in time. In current implementation of patch 2, have added few pmu control/status and counter registers, which give additional information about the PMU context for the sample. These pmu registers are not relevant for ptrace and did not want to overload pt_regs struct. Adding these arch specific regs in perf_regs will break the "arch neutral" part, and other arch can also use this new struct in perf_regs to add more data using perf_sample_regs_intr without extending the pt_regs. Maddy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
