Gautham R. Shenoy 09206b600c powernv: Pass PSSCR value and mask to power9_idle_stop ... The power9_idle_stop method currently takes only the requested stop level as a parameter and picks up the rest of the PSSCR bits from a hand-coded macro. This is not a very flexible design, especially when the firmware has the capability to communicate the psscr value and the mask associated with a particular stop state via device tree. This patch modifies the power9_idle_stop API to take as parameters the PSSCR value and the PSSCR mask corresponding to the stop state that needs to be set. These PSSCR value and mask are respectively obtained by parsing the "ibm,cpu-idle-state-psscr" and "ibm,cpu-idle-state-psscr-mask" fields from the device tree. In addition to this, the patch adds support for handling stop states for which ESL and EC bits in the PSSCR are zero. As per the architecture, a wakeup from these stop states resumes execution from the subsequent instruction as opposed to waking up at the System Vector. The older firmware sets only the Requested Level (RL) field in the psscr and psscr-mask exposed in the device tree. For older firmware where psscr-mask=0xf, this patch will set the default sane values that the set for for remaining PSSCR fields (i.e PSLL, MTL, ESL, EC, and TR). For the new firmware, the patch will validate that the invariants required by the ISA for the psscr values are maintained by the firmware. This skiboot patch that exports fully populated PSSCR values and the mask for all the stop states can be found here: https://lists.ozlabs.org/pipermail/skiboot/2016-September/004869.html [Optimize the number of instructions before entering STOP with ESL=EC=0, validate the PSSCR values provided by the firimware maintains the invariants required as per the ISA suggested by Balbir Singh] Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2017-01-31 08:32:13 +11:00
..
governors	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
coupled.c	cpuidle/coupled: Convert to hotplug state machine	2016-09-06 18:30:24 +02:00
cpuidle-arm.c	Merge branches 'pm-cpuidle', 'pm-opp' and 'pm-avs'	2016-10-02 01:43:16 +02:00
cpuidle-at91.c
cpuidle-big_little.c
cpuidle-calxeda.c	ARM: migrate to common PSCI client code	2015-08-03 15:38:39 +01:00
cpuidle-clps711x.c	drivers/cpuidle: make cpuidle-clps711x.c explicitly non-modular	2015-12-15 00:22:21 +01:00
cpuidle-cps.c	cpuidle: cpuidle-cps: Enable use with MIPSr6 CPUs.	2016-10-04 16:13:57 +02:00
cpuidle-exynos.c	drivers/cpuidle: make cpuidle-exynos.c explicitly non-modular	2015-12-15 00:22:22 +01:00
cpuidle-kirkwood.c
cpuidle-mvebu-v7.c	cpuidle: mvebu: disable the bind/unbind attributes and use builtin_platform_driver	2015-10-23 12:40:48 +02:00
cpuidle-powernv.c	powernv: Pass PSSCR value and mask to power9_idle_stop	2017-01-31 08:32:13 +11:00
cpuidle-pseries.c	cpuidle/pseries: Convert to hotplug state machine	2016-09-06 18:30:24 +02:00
cpuidle-ux500.c	drivers/cpuidle: make cpuidle-ux500.c explicitly non-modular	2015-12-15 00:22:22 +01:00
cpuidle-zynq.c
cpuidle.c	cpuidle: Add a kerneldoc comment to cpuidle_use_deepest_state()	2016-12-06 02:25:03 +01:00
cpuidle.h	cpuidle/coupled: Add sanity check for safe_state_index	2015-09-03 03:05:47 +02:00
driver.c	nmi_backtrace: generate one-line reports for idle cpus	2016-10-07 18:46:30 -07:00
dt_idle_states.c	cpuidle: dt: assign ->enter_freeze to same as ->enter callback function	2016-11-23 02:03:11 +01:00
dt_idle_states.h
governor.c	cpuidle: governors: Remove remaining old module code	2016-10-21 14:49:51 +02:00
Kconfig	cpuidle: Don't enable all governors by default	2016-01-15 22:39:58 +01:00
Kconfig.arm
Kconfig.mips	cpuidle: cpuidle-cps: Enable use with MIPSr6 CPUs.	2016-10-04 16:13:57 +02:00
Kconfig.powerpc
Makefile
sysfs.c	cpuidle: fix improper return value on error	2016-12-06 02:24:14 +01:00