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Message-ID: <mhng-ed3c61a2-45a5-4cc4-b1ec-26e25f92c0a3@palmer-ri-x1c9>
Date: Wed, 30 Mar 2022 17:16:44 -0700 (PDT)
From: Palmer Dabbelt <palmer@...belt.com>
To: apatel@...tanamicro.com
CC: Paul Walmsley <paul.walmsley@...ive.com>, aou@...s.berkeley.edu,
daniel.lezcano@...aro.org, ulf.hansson@...aro.org,
rjw@...ysocki.net, pavel@....cz, robh+dt@...nel.org,
milun.tripathy@...il.com, atishp@...shpatra.org,
Alistair Francis <Alistair.Francis@....com>,
liush@...winnertech.com, anup@...infault.org,
devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org,
linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, kvm-riscv@...ts.infradead.org
Subject: Re: [PATCH v11 0/8] RISC-V CPU Idle Support
On Wed, 09 Feb 2022 21:49:39 PST (-0800), apatel@...tanamicro.com wrote:
> From: Anup Patel <anup.patel@....com>
>
> 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_v11 branch of
> https://github.com/avpatel/linux.git
>
> 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 v10:
> - Rebased on Linux-5.17-rc3
> - Typo fix in commit description of PATCH6
>
> Changes since v9:
> - Rebased on Linux-5.17-rc1
>
> Changes since v8:
> - Rebased on Linux-5.15-rc5
> - Fixed DT schema check errors in PATCH7
>
> Changes since v7:
> - Rebased on Linux-5.15-rc3
> - Renamed cpuidle-sbi.c to cpuidle-riscv-sbi.c in PATCH6
>
> 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 | 2 +
> arch/riscv/configs/rv32_defconfig | 2 +
> arch/riscv/include/asm/asm.h | 27 +
> arch/riscv/include/asm/cpuidle.h | 24 +
> arch/riscv/include/asm/sbi.h | 27 +-
> arch/riscv/include/asm/suspend.h | 36 +
> 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 | 28 +-
> arch/riscv/kernel/process.c | 3 +-
> arch/riscv/kernel/suspend.c | 87 +++
> arch/riscv/kernel/suspend_entry.S | 124 ++++
> arch/riscv/kvm/vcpu_sbi_hsm.c | 4 +-
> 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-riscv-sbi.c | 627 ++++++++++++++++++
> drivers/cpuidle/dt_idle_genpd.c | 178 +++++
> drivers/cpuidle/dt_idle_genpd.h | 50 ++
> 30 files changed, 1484 insertions(+), 187 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-riscv-sbi.c
> create mode 100644 drivers/cpuidle/dt_idle_genpd.c
> create mode 100644 drivers/cpuidle/dt_idle_genpd.h
Thanks, these are on for-next.
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