[PATCH v3 0/6] powernv: cpufreq: Report frequency throttle by OCC

Viresh Kumar viresh.kumar at linaro.org
Fri May 8 15:12:34 AEST 2015

On 4 May 2015 at 14:24, Shilpasri G Bhat <shilpa.bhat at linux.vnet.ibm.com> wrote:
> This patchset intends to add frequency throttle reporting mechanism
> to powernv-cpufreq driver when OCC throttles the frequency. OCC is an
> On-Chip-Controller which takes care of the power and thermal safety of
> the chip. The CPU frequency can be throttled during an OCC reset or
> when OCC tries to limit the max allowed frequency. The patchset will
> report such conditions so as to keep the user informed about reason
> for the drop in performance of workloads when frequency is throttled.
> Changes from v2:
> - Split into multiple patches
> - Semantic fixes
> Shilpasri G Bhat (6):
>   cpufreq: poowernv: Handle throttling due to Pmax capping at chip level
>   powerpc/powernv: Add definition of OPAL_MSG_OCC message type
>   cpufreq: powernv: Register for OCC related opal_message notification
>   cpufreq: powernv: Call throttle_check() on receiving OCC_THROTTLE
>   cpufreq: powernv: Report Psafe only if PMSR.psafe_mode_active bit is
>     set
>   cpufreq: powernv: Restore cpu frequency to policy->cur on unthrottling
>  arch/powerpc/include/asm/opal-api.h |   8 ++
>  drivers/cpufreq/powernv-cpufreq.c   | 199 +++++++++++++++++++++++++++++++++---
>  2 files changed, 192 insertions(+), 15 deletions(-)

Acked-by: Viresh Kumar <viresh.kumar at linaro.org>

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