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Wysocki" , Pavel Machek , Rob Herring Cc: Sandeep Tripathy , Atish Patra , Alistair Francis , Liush , Anup Patel , devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvm-riscv@lists.infradead.org Subject: [PATCH v10 0/8] RISC-V CPU Idle Support Date: Wed, 26 Jan 2022 17:14:44 +0530 Message-Id: <20220126114452.692512-1-apatel@ventanamicro.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220126_034508_757171_36DA9582 X-CRM114-Status: GOOD ( 15.30 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Anup Patel 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_v10 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 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