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
Changes since PATCHv1:
* Update DTS patch to reference imx53.dtsi's pmu node
* Remove a superfluous newline in first patch
-- 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 | 4 +++
arch/arm/boot/dts/imx53.dtsi | 2 +-
arch/arm/mach-imx/mach-imx53.c | 68 +++++++++++++++++++++++++++++++++++++++++
drivers/perf/arm_pmu.c | 12 ++++++++
include/linux/perf/arm_pmu.h | 5 +++
5 files changed, 90 insertions(+), 1 deletion(-)
--
2.15.1
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