Hi Athira, On 7/17/20 8:08 PM, Athira Rajeev wrote:
From: Anju T Sudhakar <anju@xxxxxxxxxxxxxxxxxx> Add extended regs to sample_reg_mask in the tool side to use with `-I?` option. Perf tools side uses extended mask to display the platform supported register names (with -I? option) to the user and also send this mask to the kernel to capture the extended registers in each sample. Hence decide the mask value based on the processor version. Currently definitions for `mfspr`, `SPRN_PVR` are part of `arch/powerpc/util/header.c`. Move this to a header file so that these definitions can be re-used in other source files as well.
It seems this patch has a regression. Without this patch: $ sudo ./perf record -I ^C[ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.458 MB perf.data (318 samples) ] With this patch: $ sudo ./perf record -I Error: dummy:HG: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat' Ravi
