On Wed, Jul 7, 2021 at 2:29 AM Palmer Dabbelt <palmerdabbelt@xxxxxxxxxx> wrote: > > On Mon, 21 Jun 2021 21:49:11 PDT (-0700), anup@xxxxxxxxxxxxxx wrote: > > Hi Palmer, > > > > On Thu, Jun 10, 2021 at 10:52 AM Anup Patel <anup.patel@xxxxxxx> 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 > >>
