[v7,0/8] RISC-V CPU Idle Support

Message ID 20210610052221.39958-1-anup.patel@wdc.com
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  • RISC-V CPU Idle Support
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Anup Patel June 10, 2021, 5:22 a.m.
This series adds RISC-V CPU Idle support using SBI HSM suspend function.
The RISC-V SBI CPU idle driver added by this series is highly inspired
from the ARM PSCI CPU idle driver.

At high-level, this series includes the following changes:
1) Preparatory arch/riscv patches (Patches 1 to 3)
2) Defines for RISC-V SBI HSM suspend (Patch 4)
3) Preparatory patch to share code between RISC-V SBI CPU idle driver
   and ARM PSCI CPU idle driver (Patch 5)
4) RISC-V SBI CPU idle driver and related DT bindings (Patches 6 to 7)

These patches can be found in riscv_sbi_hsm_suspend_v7 branch at
https://github.com/avpatel/linux

Special thanks Sandeep Tripathy for providing early feeback on SBI HSM
support in all above projects (RISC-V SBI specification, OpenSBI, and
Linux RISC-V).

Changes since v6:
 - Fixed error reported by "make DT_CHECKER_FLAGS=-m dt_binding_check"

Changes since v5:
 - Rebased on Linux-5.13-rc5
 - Removed unnecessary exports from PATCH5
 - Removed stray ";" from PATCH5
 - Moved sbi_cpuidle_pd_power_off() under "#ifdef CONFIG_DT_IDLE_GENPD"
   in PATCH6

Changes since v4:
 - Rebased on Linux-5.13-rc2
 - Renamed all dt_idle_genpd functions to have "dt_idle_" prefix
 - Added MAINTAINERS file entry for dt_idle_genpd

Changes since v3:
 - Rebased on Linux-5.13-rc2
 - Fixed __cpu_resume_enter() which was broken due to XIP kernel support
 - Removed "struct dt_idle_genpd_ops" abstraction which simplifies code
   sharing between ARM PSCI and RISC-V SBI drivers in PATCH5

Changes since v2:
 - Rebased on Linux-5.12-rc3
 - Updated PATCH7 to add common DT bindings for both ARM and RISC-V
   idle states
 - Added "additionalProperties = false" for both idle-states node and
   child nodes in PATCH7

Changes since v1:
 - Fixex minor typo in PATCH1
 - Use just "idle-states" as DT node name for CPU idle states
 - Added documentation for "cpu-idle-states" DT property in
   devicetree/bindings/riscv/cpus.yaml
 - Added documentation for "riscv,sbi-suspend-param" DT property in
   devicetree/bindings/riscv/idle-states.yaml

Anup Patel (8):
  RISC-V: Enable CPU_IDLE drivers
  RISC-V: Rename relocate() and make it global
  RISC-V: Add arch functions for non-retentive suspend entry/exit
  RISC-V: Add SBI HSM suspend related defines
  cpuidle: Factor-out power domain related code from PSCI domain driver
  cpuidle: Add RISC-V SBI CPU idle driver
  dt-bindings: Add common bindings for ARM and RISC-V idle states
  RISC-V: Enable RISC-V SBI CPU Idle driver for QEMU virt machine

 .../bindings/arm/msm/qcom,idle-state.txt      |   2 +-
 .../devicetree/bindings/arm/psci.yaml         |   2 +-
 .../bindings/{arm => cpu}/idle-states.yaml    | 228 ++++++-
 .../devicetree/bindings/riscv/cpus.yaml       |   6 +
 MAINTAINERS                                   |  14 +
 arch/riscv/Kconfig                            |   7 +
 arch/riscv/Kconfig.socs                       |   3 +
 arch/riscv/configs/defconfig                  |  13 +-
 arch/riscv/configs/rv32_defconfig             |   6 +-
 arch/riscv/include/asm/asm.h                  |  17 +
 arch/riscv/include/asm/cpuidle.h              |  24 +
 arch/riscv/include/asm/sbi.h                  |  27 +-
 arch/riscv/include/asm/suspend.h              |  35 +
 arch/riscv/kernel/Makefile                    |   2 +
 arch/riscv/kernel/asm-offsets.c               |   3 +
 arch/riscv/kernel/cpu_ops_sbi.c               |   2 +-
 arch/riscv/kernel/head.S                      |  18 +-
 arch/riscv/kernel/process.c                   |   3 +-
 arch/riscv/kernel/suspend.c                   |  86 +++
 arch/riscv/kernel/suspend_entry.S             | 123 ++++
 drivers/cpuidle/Kconfig                       |   9 +
 drivers/cpuidle/Kconfig.arm                   |   1 +
 drivers/cpuidle/Kconfig.riscv                 |  15 +
 drivers/cpuidle/Makefile                      |   5 +
 drivers/cpuidle/cpuidle-psci-domain.c         | 138 +---
 drivers/cpuidle/cpuidle-psci.h                |  15 +-
 drivers/cpuidle/cpuidle-sbi.c                 | 626 ++++++++++++++++++
 drivers/cpuidle/dt_idle_genpd.c               | 177 +++++
 drivers/cpuidle/dt_idle_genpd.h               |  50 ++
 29 files changed, 1472 insertions(+), 185 deletions(-)
 rename Documentation/devicetree/bindings/{arm => cpu}/idle-states.yaml (74%)
 create mode 100644 arch/riscv/include/asm/cpuidle.h
 create mode 100644 arch/riscv/include/asm/suspend.h
 create mode 100644 arch/riscv/kernel/suspend.c
 create mode 100644 arch/riscv/kernel/suspend_entry.S
 create mode 100644 drivers/cpuidle/Kconfig.riscv
 create mode 100644 drivers/cpuidle/cpuidle-sbi.c
 create mode 100644 drivers/cpuidle/dt_idle_genpd.c
 create mode 100644 drivers/cpuidle/dt_idle_genpd.h

Comments

Anup Patel June 22, 2021, 4:49 a.m. | #1
Hi Palmer,

On Thu, Jun 10, 2021 at 10:52 AM Anup Patel <anup.patel@wdc.com> wrote:
>

> This series adds RISC-V CPU Idle support using SBI HSM suspend function.

> The RISC-V SBI CPU idle driver added by this series is highly inspired

> from the ARM PSCI CPU idle driver.

>

> At high-level, this series includes the following changes:

> 1) Preparatory arch/riscv patches (Patches 1 to 3)

> 2) Defines for RISC-V SBI HSM suspend (Patch 4)

> 3) Preparatory patch to share code between RISC-V SBI CPU idle driver

>    and ARM PSCI CPU idle driver (Patch 5)

> 4) RISC-V SBI CPU idle driver and related DT bindings (Patches 6 to 7)

>

> These patches can be found in riscv_sbi_hsm_suspend_v7 branch at

> https://github.com/avpatel/linux

>

> Special thanks Sandeep Tripathy for providing early feeback on SBI HSM

> support in all above projects (RISC-V SBI specification, OpenSBI, and

> Linux RISC-V).

>

> Changes since v6:

>  - Fixed error reported by "make DT_CHECKER_FLAGS=-m dt_binding_check"

>

> Changes since v5:

>  - Rebased on Linux-5.13-rc5

>  - Removed unnecessary exports from PATCH5

>  - Removed stray ";" from PATCH5

>  - Moved sbi_cpuidle_pd_power_off() under "#ifdef CONFIG_DT_IDLE_GENPD"

>    in PATCH6

>

> Changes since v4:

>  - Rebased on Linux-5.13-rc2

>  - Renamed all dt_idle_genpd functions to have "dt_idle_" prefix

>  - Added MAINTAINERS file entry for dt_idle_genpd

>

> Changes since v3:

>  - Rebased on Linux-5.13-rc2

>  - Fixed __cpu_resume_enter() which was broken due to XIP kernel support

>  - Removed "struct dt_idle_genpd_ops" abstraction which simplifies code

>    sharing between ARM PSCI and RISC-V SBI drivers in PATCH5

>

> Changes since v2:

>  - Rebased on Linux-5.12-rc3

>  - Updated PATCH7 to add common DT bindings for both ARM and RISC-V

>    idle states

>  - Added "additionalProperties = false" for both idle-states node and

>    child nodes in PATCH7

>

> Changes since v1:

>  - Fixex minor typo in PATCH1

>  - Use just "idle-states" as DT node name for CPU idle states

>  - Added documentation for "cpu-idle-states" DT property in

>    devicetree/bindings/riscv/cpus.yaml

>  - Added documentation for "riscv,sbi-suspend-param" DT property in

>    devicetree/bindings/riscv/idle-states.yaml

>

> Anup Patel (8):

>   RISC-V: Enable CPU_IDLE drivers

>   RISC-V: Rename relocate() and make it global

>   RISC-V: Add arch functions for non-retentive suspend entry/exit

>   RISC-V: Add SBI HSM suspend related defines

>   cpuidle: Factor-out power domain related code from PSCI domain driver

>   cpuidle: Add RISC-V SBI CPU idle driver

>   dt-bindings: Add common bindings for ARM and RISC-V idle states

>   RISC-V: Enable RISC-V SBI CPU Idle driver for QEMU virt machine


Can you please review this series ?

It would be nice to consider this series for Linux-5.14.

Regards,
Anup

>

>  .../bindings/arm/msm/qcom,idle-state.txt      |   2 +-

>  .../devicetree/bindings/arm/psci.yaml         |   2 +-

>  .../bindings/{arm => cpu}/idle-states.yaml    | 228 ++++++-

>  .../devicetree/bindings/riscv/cpus.yaml       |   6 +

>  MAINTAINERS                                   |  14 +

>  arch/riscv/Kconfig                            |   7 +

>  arch/riscv/Kconfig.socs                       |   3 +

>  arch/riscv/configs/defconfig                  |  13 +-

>  arch/riscv/configs/rv32_defconfig             |   6 +-

>  arch/riscv/include/asm/asm.h                  |  17 +

>  arch/riscv/include/asm/cpuidle.h              |  24 +

>  arch/riscv/include/asm/sbi.h                  |  27 +-

>  arch/riscv/include/asm/suspend.h              |  35 +

>  arch/riscv/kernel/Makefile                    |   2 +

>  arch/riscv/kernel/asm-offsets.c               |   3 +

>  arch/riscv/kernel/cpu_ops_sbi.c               |   2 +-

>  arch/riscv/kernel/head.S                      |  18 +-

>  arch/riscv/kernel/process.c                   |   3 +-

>  arch/riscv/kernel/suspend.c                   |  86 +++

>  arch/riscv/kernel/suspend_entry.S             | 123 ++++

>  drivers/cpuidle/Kconfig                       |   9 +

>  drivers/cpuidle/Kconfig.arm                   |   1 +

>  drivers/cpuidle/Kconfig.riscv                 |  15 +

>  drivers/cpuidle/Makefile                      |   5 +

>  drivers/cpuidle/cpuidle-psci-domain.c         | 138 +---

>  drivers/cpuidle/cpuidle-psci.h                |  15 +-

>  drivers/cpuidle/cpuidle-sbi.c                 | 626 ++++++++++++++++++

>  drivers/cpuidle/dt_idle_genpd.c               | 177 +++++

>  drivers/cpuidle/dt_idle_genpd.h               |  50 ++

>  29 files changed, 1472 insertions(+), 185 deletions(-)

>  rename Documentation/devicetree/bindings/{arm => cpu}/idle-states.yaml (74%)

>  create mode 100644 arch/riscv/include/asm/cpuidle.h

>  create mode 100644 arch/riscv/include/asm/suspend.h

>  create mode 100644 arch/riscv/kernel/suspend.c

>  create mode 100644 arch/riscv/kernel/suspend_entry.S

>  create mode 100644 drivers/cpuidle/Kconfig.riscv

>  create mode 100644 drivers/cpuidle/cpuidle-sbi.c

>  create mode 100644 drivers/cpuidle/dt_idle_genpd.c

>  create mode 100644 drivers/cpuidle/dt_idle_genpd.h

>

> --

> 2.25.1

>
Palmer Dabbelt July 6, 2021, 8:59 p.m. | #2
On Mon, 21 Jun 2021 21:49:11 PDT (-0700), anup@brainfault.org wrote:
> Hi Palmer,
>
> On Thu, Jun 10, 2021 at 10:52 AM Anup Patel <anup.patel@wdc.com> wrote:
>>
>> This series adds RISC-V CPU Idle support using SBI HSM suspend function.
>> The RISC-V SBI CPU idle driver added by this series is highly inspired
>> from the ARM PSCI CPU idle driver.
>>
>> At high-level, this series includes the following changes:
>> 1) Preparatory arch/riscv patches (Patches 1 to 3)
>> 2) Defines for RISC-V SBI HSM suspend (Patch 4)
>> 3) Preparatory patch to share code between RISC-V SBI CPU idle driver
>>    and ARM PSCI CPU idle driver (Patch 5)
>> 4) RISC-V SBI CPU idle driver and related DT bindings (Patches 6 to 7)
>>
>> These patches can be found in riscv_sbi_hsm_suspend_v7 branch at
>> https://github.com/avpatel/linux
>>
>> Special thanks Sandeep Tripathy for providing early feeback on SBI HSM
>> support in all above projects (RISC-V SBI specification, OpenSBI, and
>> Linux RISC-V).
>>
>> Changes since v6:
>>  - Fixed error reported by "make DT_CHECKER_FLAGS=-m dt_binding_check"
>>
>> Changes since v5:
>>  - Rebased on Linux-5.13-rc5
>>  - Removed unnecessary exports from PATCH5
>>  - Removed stray ";" from PATCH5
>>  - Moved sbi_cpuidle_pd_power_off() under "#ifdef CONFIG_DT_IDLE_GENPD"
>>    in PATCH6
>>
>> Changes since v4:
>>  - Rebased on Linux-5.13-rc2
>>  - Renamed all dt_idle_genpd functions to have "dt_idle_" prefix
>>  - Added MAINTAINERS file entry for dt_idle_genpd
>>
>> Changes since v3:
>>  - Rebased on Linux-5.13-rc2
>>  - Fixed __cpu_resume_enter() which was broken due to XIP kernel support
>>  - Removed "struct dt_idle_genpd_ops" abstraction which simplifies code
>>    sharing between ARM PSCI and RISC-V SBI drivers in PATCH5
>>
>> Changes since v2:
>>  - Rebased on Linux-5.12-rc3
>>  - Updated PATCH7 to add common DT bindings for both ARM and RISC-V
>>    idle states
>>  - Added "additionalProperties = false" for both idle-states node and
>>    child nodes in PATCH7
>>
>> Changes since v1:
>>  - Fixex minor typo in PATCH1
>>  - Use just "idle-states" as DT node name for CPU idle states
>>  - Added documentation for "cpu-idle-states" DT property in
>>    devicetree/bindings/riscv/cpus.yaml
>>  - Added documentation for "riscv,sbi-suspend-param" DT property in
>>    devicetree/bindings/riscv/idle-states.yaml
>>
>> Anup Patel (8):
>>   RISC-V: Enable CPU_IDLE drivers
>>   RISC-V: Rename relocate() and make it global
>>   RISC-V: Add arch functions for non-retentive suspend entry/exit
>>   RISC-V: Add SBI HSM suspend related defines
>>   cpuidle: Factor-out power domain related code from PSCI domain driver
>>   cpuidle: Add RISC-V SBI CPU idle driver
>>   dt-bindings: Add common bindings for ARM and RISC-V idle states
>>   RISC-V: Enable RISC-V SBI CPU Idle driver for QEMU virt machine
>
> Can you please review this series ?
>
> It would be nice to consider this series for Linux-5.14.

I'd assumed this one was part of the 0.3.0 freeze.

>
> Regards,
> Anup
>
>>
>>  .../bindings/arm/msm/qcom,idle-state.txt      |   2 +-
>>  .../devicetree/bindings/arm/psci.yaml         |   2 +-
>>  .../bindings/{arm => cpu}/idle-states.yaml    | 228 ++++++-
>>  .../devicetree/bindings/riscv/cpus.yaml       |   6 +
>>  MAINTAINERS                                   |  14 +
>>  arch/riscv/Kconfig                            |   7 +
>>  arch/riscv/Kconfig.socs                       |   3 +
>>  arch/riscv/configs/defconfig                  |  13 +-
>>  arch/riscv/configs/rv32_defconfig             |   6 +-
>>  arch/riscv/include/asm/asm.h                  |  17 +
>>  arch/riscv/include/asm/cpuidle.h              |  24 +
>>  arch/riscv/include/asm/sbi.h                  |  27 +-
>>  arch/riscv/include/asm/suspend.h              |  35 +
>>  arch/riscv/kernel/Makefile                    |   2 +
>>  arch/riscv/kernel/asm-offsets.c               |   3 +
>>  arch/riscv/kernel/cpu_ops_sbi.c               |   2 +-
>>  arch/riscv/kernel/head.S                      |  18 +-
>>  arch/riscv/kernel/process.c                   |   3 +-
>>  arch/riscv/kernel/suspend.c                   |  86 +++
>>  arch/riscv/kernel/suspend_entry.S             | 123 ++++
>>  drivers/cpuidle/Kconfig                       |   9 +
>>  drivers/cpuidle/Kconfig.arm                   |   1 +
>>  drivers/cpuidle/Kconfig.riscv                 |  15 +
>>  drivers/cpuidle/Makefile                      |   5 +
>>  drivers/cpuidle/cpuidle-psci-domain.c         | 138 +---
>>  drivers/cpuidle/cpuidle-psci.h                |  15 +-
>>  drivers/cpuidle/cpuidle-sbi.c                 | 626 ++++++++++++++++++
>>  drivers/cpuidle/dt_idle_genpd.c               | 177 +++++
>>  drivers/cpuidle/dt_idle_genpd.h               |  50 ++
>>  29 files changed, 1472 insertions(+), 185 deletions(-)
>>  rename Documentation/devicetree/bindings/{arm => cpu}/idle-states.yaml (74%)
>>  create mode 100644 arch/riscv/include/asm/cpuidle.h
>>  create mode 100644 arch/riscv/include/asm/suspend.h
>>  create mode 100644 arch/riscv/kernel/suspend.c
>>  create mode 100644 arch/riscv/kernel/suspend_entry.S
>>  create mode 100644 drivers/cpuidle/Kconfig.riscv
>>  create mode 100644 drivers/cpuidle/cpuidle-sbi.c
>>  create mode 100644 drivers/cpuidle/dt_idle_genpd.c
>>  create mode 100644 drivers/cpuidle/dt_idle_genpd.h
>>
>> --
>> 2.25.1
>>
Anup Patel July 7, 2021, 3:51 p.m. | #3
On Wed, Jul 7, 2021 at 2:29 AM Palmer Dabbelt <palmerdabbelt@google.com> wrote:
>
> On Mon, 21 Jun 2021 21:49:11 PDT (-0700), anup@brainfault.org wrote:
> > Hi Palmer,
> >
> > On Thu, Jun 10, 2021 at 10:52 AM Anup Patel <anup.patel@wdc.com> wrote:
> >>
> >> This series adds RISC-V CPU Idle support using SBI HSM suspend function.
> >> The RISC-V SBI CPU idle driver added by this series is highly inspired
> >> from the ARM PSCI CPU idle driver.
> >>
> >> At high-level, this series includes the following changes:
> >> 1) Preparatory arch/riscv patches (Patches 1 to 3)
> >> 2) Defines for RISC-V SBI HSM suspend (Patch 4)
> >> 3) Preparatory patch to share code between RISC-V SBI CPU idle driver
> >>    and ARM PSCI CPU idle driver (Patch 5)
> >> 4) RISC-V SBI CPU idle driver and related DT bindings (Patches 6 to 7)
> >>
> >> These patches can be found in riscv_sbi_hsm_suspend_v7 branch at
> >> https://github.com/avpatel/linux
> >>
> >> Special thanks Sandeep Tripathy for providing early feeback on SBI HSM
> >> support in all above projects (RISC-V SBI specification, OpenSBI, and
> >> Linux RISC-V).
> >>
> >> Changes since v6:
> >>  - Fixed error reported by "make DT_CHECKER_FLAGS=-m dt_binding_check"
> >>
> >> Changes since v5:
> >>  - Rebased on Linux-5.13-rc5
> >>  - Removed unnecessary exports from PATCH5
> >>  - Removed stray ";" from PATCH5
> >>  - Moved sbi_cpuidle_pd_power_off() under "#ifdef CONFIG_DT_IDLE_GENPD"
> >>    in PATCH6
> >>
> >> Changes since v4:
> >>  - Rebased on Linux-5.13-rc2
> >>  - Renamed all dt_idle_genpd functions to have "dt_idle_" prefix
> >>  - Added MAINTAINERS file entry for dt_idle_genpd
> >>
> >> Changes since v3:
> >>  - Rebased on Linux-5.13-rc2
> >>  - Fixed __cpu_resume_enter() which was broken due to XIP kernel support
> >>  - Removed "struct dt_idle_genpd_ops" abstraction which simplifies code
> >>    sharing between ARM PSCI and RISC-V SBI drivers in PATCH5
> >>
> >> Changes since v2:
> >>  - Rebased on Linux-5.12-rc3
> >>  - Updated PATCH7 to add common DT bindings for both ARM and RISC-V
> >>    idle states
> >>  - Added "additionalProperties = false" for both idle-states node and
> >>    child nodes in PATCH7
> >>
> >> Changes since v1:
> >>  - Fixex minor typo in PATCH1
> >>  - Use just "idle-states" as DT node name for CPU idle states
> >>  - Added documentation for "cpu-idle-states" DT property in
> >>    devicetree/bindings/riscv/cpus.yaml
> >>  - Added documentation for "riscv,sbi-suspend-param" DT property in
> >>    devicetree/bindings/riscv/idle-states.yaml
> >>
> >> Anup Patel (8):
> >>   RISC-V: Enable CPU_IDLE drivers
> >>   RISC-V: Rename relocate() and make it global
> >>   RISC-V: Add arch functions for non-retentive suspend entry/exit
> >>   RISC-V: Add SBI HSM suspend related defines
> >>   cpuidle: Factor-out power domain related code from PSCI domain driver
> >>   cpuidle: Add RISC-V SBI CPU idle driver
> >>   dt-bindings: Add common bindings for ARM and RISC-V idle states
> >>   RISC-V: Enable RISC-V SBI CPU Idle driver for QEMU virt machine
> >
> > Can you please review this series ?
> >
> > It would be nice to consider this series for Linux-5.14.
>
> I'd assumed this one was part of the 0.3.0 freeze.

Yes, SBI HSM suspend call is part of SBI v0.3.0 release.
(Refer, https://github.com/riscv/riscv-sbi-doc/releases/tag/v0.3.0)

Regards,
Anup

>
> >
> > Regards,
> > Anup
> >
> >>
> >>  .../bindings/arm/msm/qcom,idle-state.txt      |   2 +-
> >>  .../devicetree/bindings/arm/psci.yaml         |   2 +-
> >>  .../bindings/{arm => cpu}/idle-states.yaml    | 228 ++++++-
> >>  .../devicetree/bindings/riscv/cpus.yaml       |   6 +
> >>  MAINTAINERS                                   |  14 +
> >>  arch/riscv/Kconfig                            |   7 +
> >>  arch/riscv/Kconfig.socs                       |   3 +
> >>  arch/riscv/configs/defconfig                  |  13 +-
> >>  arch/riscv/configs/rv32_defconfig             |   6 +-
> >>  arch/riscv/include/asm/asm.h                  |  17 +
> >>  arch/riscv/include/asm/cpuidle.h              |  24 +
> >>  arch/riscv/include/asm/sbi.h                  |  27 +-
> >>  arch/riscv/include/asm/suspend.h              |  35 +
> >>  arch/riscv/kernel/Makefile                    |   2 +
> >>  arch/riscv/kernel/asm-offsets.c               |   3 +
> >>  arch/riscv/kernel/cpu_ops_sbi.c               |   2 +-
> >>  arch/riscv/kernel/head.S                      |  18 +-
> >>  arch/riscv/kernel/process.c                   |   3 +-
> >>  arch/riscv/kernel/suspend.c                   |  86 +++
> >>  arch/riscv/kernel/suspend_entry.S             | 123 ++++
> >>  drivers/cpuidle/Kconfig                       |   9 +
> >>  drivers/cpuidle/Kconfig.arm                   |   1 +
> >>  drivers/cpuidle/Kconfig.riscv                 |  15 +
> >>  drivers/cpuidle/Makefile                      |   5 +
> >>  drivers/cpuidle/cpuidle-psci-domain.c         | 138 +---
> >>  drivers/cpuidle/cpuidle-psci.h                |  15 +-
> >>  drivers/cpuidle/cpuidle-sbi.c                 | 626 ++++++++++++++++++
> >>  drivers/cpuidle/dt_idle_genpd.c               | 177 +++++
> >>  drivers/cpuidle/dt_idle_genpd.h               |  50 ++
> >>  29 files changed, 1472 insertions(+), 185 deletions(-)
> >>  rename Documentation/devicetree/bindings/{arm => cpu}/idle-states.yaml (74%)
> >>  create mode 100644 arch/riscv/include/asm/cpuidle.h
> >>  create mode 100644 arch/riscv/include/asm/suspend.h
> >>  create mode 100644 arch/riscv/kernel/suspend.c
> >>  create mode 100644 arch/riscv/kernel/suspend_entry.S
> >>  create mode 100644 drivers/cpuidle/Kconfig.riscv
> >>  create mode 100644 drivers/cpuidle/cpuidle-sbi.c
> >>  create mode 100644 drivers/cpuidle/dt_idle_genpd.c
> >>  create mode 100644 drivers/cpuidle/dt_idle_genpd.h
> >>
> >> --
> >> 2.25.1
> >>