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Message-ID: <CAAhSdy21kOR8f8=9R-1HQW4ncmVcJEFRjNWU1N+mLejAHgBcHg@mail.gmail.com>
Date: Wed, 7 Jul 2021 21:21:47 +0530
From: Anup Patel <anup@...infault.org>
To: Palmer Dabbelt <palmerdabbelt@...gle.com>
Cc: Anup Patel <Anup.Patel@....com>,
Paul Walmsley <paul.walmsley@...ive.com>,
Albert Ou <aou@...s.berkeley.edu>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Ulf Hansson <ulf.hansson@...aro.org>,
"Rafael J . Wysocki" <rjw@...ysocki.net>,
Pavel Machek <pavel@....cz>, Rob Herring <robh+dt@...nel.org>,
Sandeep Tripathy <milun.tripathy@...il.com>,
Atish Patra <Atish.Patra@....com>,
Alistair Francis <Alistair.Francis@....com>,
liush <liush@...winnertech.com>,
DTML <devicetree@...r.kernel.org>,
linux-riscv <linux-riscv@...ts.infradead.org>,
"linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
"open list:THERMAL" <linux-pm@...r.kernel.org>,
linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v7 0/8] RISC-V CPU Idle Support
On Wed, Jul 7, 2021 at 2:29 AM Palmer Dabbelt <palmerdabbelt@...gle.com> wrote:
>
> On Mon, 21 Jun 2021 21:49:11 PDT (-0700), anup@...infault.org wrote:
> > Hi Palmer,
> >
> > On Thu, Jun 10, 2021 at 10:52 AM Anup Patel <anup.patel@....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
> >>
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