powerpc/perf: Add support for sampling interrupt register state

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The perf infrastructure uses a bit mask to find out valid registers to
display. Define a register mask for supported registers defined in
uapi/asm/perf_regs.h. The bit positions also correspond to register IDs
which is used by perf infrastructure to fetch the register values.
CONFIG_HAVE_PERF_REGS enables sampling of the interrupted machine state.

Signed-off-by: Anju T <anju@linux.vnet.ibm.com>
[mpe: Add license, use CONFIG_PPC64, fix 32-bit build]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Anju T 2016-02-20 10:32:46 +05:30 • committed by Michael Ellerman

parent 1bfadabfeb

commit ed4a4ef85c

3 changed files with 106 additions and 1 deletions

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1

arch/powerpc/Kconfig

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2

arch/powerpc/perf/Makefile

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104

arch/powerpc/perf/perf_regs.c

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