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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, Anup Patel Subject: [RFC PATCH v2 0/8] RISC-V CPU Idle Support Date: Tue, 16 Mar 2021 16:11:32 +0530 Message-Id: <20210316104140.878019-1-anup.patel@wdc.com> X-Mailer: git-send-email 2.25.1 X-Originating-IP: [122.167.218.45] X-ClientProxiedBy: MA1PR01CA0136.INDPRD01.PROD.OUTLOOK.COM (2603:1096:a00:35::30) To DM6PR04MB6201.namprd04.prod.outlook.com (2603:10b6:5:127::32) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from wdc.com (122.167.218.45) by MA1PR01CA0136.INDPRD01.PROD.OUTLOOK.COM (2603:1096:a00:35::30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3933.31 via Frontend Transport; Tue, 16 Mar 2021 10:42:04 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: a5590ac3-024c-4c1a-cb21-08d8e86826ac X-MS-TrafficTypeDiagnostic: DM6PR04MB6377: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: WDCIPOUTBOUND: EOP-TRUE X-MS-Oob-TLC-OOBClassifiers: OLM:8273; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DM6PR04MB6201.namprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(4636009)(366004)(8676002)(36756003)(44832011)(52116002)(86362001)(83380400001)(110136005)(7696005)(966005)(8936002)(66946007)(8886007)(55016002)(7416002)(186003)(66556008)(16526019)(66476007)(26005)(956004)(2906002)(2616005)(4326008)(6666004)(5660300002)(498600001)(1076003)(54906003);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-Network-Message-Id: a5590ac3-024c-4c1a-cb21-08d8e86826ac X-MS-Exchange-CrossTenant-AuthSource: DM6PR04MB6201.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Mar 2021 10:42:09.8494 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: qyQC4ONe6kOmxz3ZMnz/xGeLrLFGEIeSlxM163+a2PyuAughux2+v/hdbYMnnxHTUHldymaNAk4t/+SvkbT0VQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR04MB6377 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org 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_v2 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 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 bindings documentation for RISC-V idle states RISC-V: Enable RISC-V SBI CPU Idle driver for QEMU virt machine .../devicetree/bindings/riscv/cpus.yaml | 6 + .../bindings/riscv/idle-states.yaml | 256 +++++++++ MAINTAINERS | 8 + arch/riscv/Kconfig | 7 + arch/riscv/Kconfig.socs | 3 + arch/riscv/configs/defconfig | 8 +- arch/riscv/configs/rv32_defconfig | 5 +- 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 | 7 +- arch/riscv/kernel/process.c | 3 +- arch/riscv/kernel/suspend.c | 86 +++ arch/riscv/kernel/suspend_entry.S | 116 ++++ drivers/cpuidle/Kconfig | 9 + drivers/cpuidle/Kconfig.arm | 1 + drivers/cpuidle/Kconfig.riscv | 15 + drivers/cpuidle/Makefile | 5 + drivers/cpuidle/cpuidle-psci-domain.c | 244 +-------- drivers/cpuidle/cpuidle-psci.h | 15 +- drivers/cpuidle/cpuidle-sbi.c | 502 ++++++++++++++++++ ...{cpuidle-psci-domain.c => dt_idle_genpd.c} | 165 ++---- drivers/cpuidle/dt_idle_genpd.h | 42 ++ 26 files changed, 1229 insertions(+), 367 deletions(-) create mode 100644 Documentation/devicetree/bindings/riscv/idle-states.yaml 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 copy drivers/cpuidle/{cpuidle-psci-domain.c => dt_idle_genpd.c} (52%) create mode 100644 drivers/cpuidle/dt_idle_genpd.h