Re: [PATCH v1 0/7] RAPL fixes (for linux-next)

[Rafael J. Wysocki]

On Tue, Mar 31, 2026 at 11:20 PM Kuppuswamy Sathyanarayanan
<sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx> wrote:
>
> Hi Rafael,
>
> This series consolidates and rebases patches from three previously
> submitted cleanup series that were dropped from your linux-next due
> to a circular locking dependency issue:
>
>   https://lore.kernel.org/linux-pm/202603300921.b5dc709c-lkp@xxxxxxxxx/
>
> The three series are:
>
>   Move RAPL defaults to interface drivers:
>   https://lore.kernel.org/linux-pm/20260212233044.329790-1-sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx/
>
>   Move RAPL primitives to interface drivers:
>   https://lore.kernel.org/linux-pm/20260313185333.2370733-1-sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx/
>
>   Consolidate CPU list in RAPL MSR drivers:
>   https://lore.kernel.org/linux-pm/20260313190052.2370963-1-sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx/
>
> The circular locking dependency was introduced by a patch in the first
> series that registered and unregistered the PM notifier dynamically
> from rapl_add_package_cpuslocked() and rapl_remove_package_cpuslocked(),
> which are called from CPU hotplug callbacks leading to circular
> dependency between PM notifier lock and hotplug locks.
>
> That patch has been dropped in this series. The PM notifier
> registration is kept in rapl_init()/rapl_exit() as it was originally,
> and the remaining dependent patches are rebased on top of this.
>
> This series is based on top of:
>   https://github.com/rafaeljw/linux-pm/tree/pm-powercap
>
> Kuppuswamy Sathyanarayanan (7):
>   powercap: intel_rapl: Move MSR default settings into MSR interface
>     driver
>   powercap: intel_rapl: Remove unused macro definitions
>   powercap: intel_rapl: Move primitive info to header for interface
>     drivers
>   powercap: intel_rapl: Move TPMI primitives to TPMI driver
>   thermal: intel: int340x: processor: Move MMIO primitives to MMIO
>     driver
>   powercap: intel_rapl: Move MSR primitives to MSR driver
>   powercap: intel_rapl: Consolidate PL4 and PMU support flags into
>     rapl_defaults
>
>  drivers/powercap/intel_rapl_common.c          | 421 +-----------------
>  drivers/powercap/intel_rapl_msr.c             | 392 ++++++++++++++--
>  drivers/powercap/intel_rapl_tpmi.c            |  53 +++
>  .../int340x_thermal/processor_thermal_rapl.c  |  72 +++
>  include/linux/intel_rapl.h                    |  34 +-
>  5 files changed, 522 insertions(+), 450 deletions(-)
>
> --

Applied, thanks!