[PATCH 0/3] Improved perf support for imx53/ppd

Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxxxx> · Thu, 18 Jan 2018 18:43:42 +0100

Hi,

This improves perf on imx53 by adding support for enabling the Secure
Debug Enable Register (SDER) SUNIDEN bit. This unlocks new
functionality:

ppd before patchset# perf stat -e cycles,instructions sleep 1 2>&1 | grep instructions
                 0      instructions              #    0.00  insn per cycle

ppd  after patchset# perf stat -e cycles,instructions sleep 1 2>&1 | grep instructions
            177864      instructions              #    0.05  insn per cycle

-- Sebastian

Peter Senna Tschudin (2):
  ARM: imx53: add SoC specific PMU setup
  ARM: dts: imx53: PPD: Enable secure-reg-access

Sebastian Reichel (1):
  drivers/perf: arm_pmu: Add platform hardware setup hooks.

 arch/arm/boot/dts/imx53-ppd.dts |  6 ++++
 arch/arm/mach-imx/mach-imx53.c  | 68 +++++++++++++++++++++++++++++++++++++++++
 drivers/perf/arm_pmu.c          | 13 ++++++++
 include/linux/perf/arm_pmu.h    |  5 +++
 4 files changed, 92 insertions(+)

-- 
2.15.1

--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html