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Fri, 22 Sep 2023 17:52:21 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BL02EPF0001A108.mail.protection.outlook.com (10.167.241.138) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6838.14 via Frontend Transport; Fri, 22 Sep 2023 17:52:21 +0000 Received: from jatayu.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Fri, 22 Sep 2023 12:52:17 -0500 From: Shyam Sundar S K To: , , , , , , , , , CC: , , , , , , "Shyam Sundar S K" Subject: [PATCH 08/15] platform/x86/amd/pmf: Add support to update system state Date: Fri, 22 Sep 2023 23:20:49 +0530 Message-ID: <20230922175056.244940-9-Shyam-sundar.S-k@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230922175056.244940-1-Shyam-sundar.S-k@amd.com> References: <20230922175056.244940-1-Shyam-sundar.S-k@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF0001A108:EE_|MN2PR12MB4080:EE_ X-MS-Office365-Filtering-Correlation-Id: 36898169-fb95-4a5b-3acd-08dbbb94ac07 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Based on the udev rules set in the userspace the event id matching the uevent shall get updated accordingly using the systemctl. Sample udev rules under Documentation/admin-guide/pmf.rst. Signed-off-by: Shyam Sundar S K --- Documentation/admin-guide/pmf.rst | 24 ++++++++++++++++ drivers/platform/x86/amd/pmf/pmf.h | 9 ++++++ drivers/platform/x86/amd/pmf/tee-if.c | 40 ++++++++++++++++++++++++++- 3 files changed, 72 insertions(+), 1 deletion(-) create mode 100644 Documentation/admin-guide/pmf.rst diff --git a/Documentation/admin-guide/pmf.rst b/Documentation/admin-guide/pmf.rst new file mode 100644 index 000000000000..b60f381410c3 --- /dev/null +++ b/Documentation/admin-guide/pmf.rst @@ -0,0 +1,24 @@ +.. SPDX-License-Identifier: GPL-2.0 + +Set udev rules for PMF Smart PC Builder +--------------------------------------- + +AMD PMF(Platform Management Framework) Smart PC Solution builder has to set the system states +like S0i3, Screen lock, hibernate etc, based on the output actions provided by the PMF +TA (Trusted Application). + +In order for this to work the PMF driver generates a uevent for userspace to react to. Below are +sample udev rules that can facilitate this experience when a machine has PMF Smart PC solution builder +enabled. + +Please add the following line(s) to +``/etc/udev/rules.d/99-local.rules``:: + DRIVERS=="amd-pmf", ACTION=="change", ENV{EVENT_ID}=="1", RUN+="/usr/bin/systemctl suspend" + DRIVERS=="amd-pmf", ACTION=="change", ENV{EVENT_ID}=="2", RUN+="/usr/bin/systemctl hibernate" + DRIVERS=="amd-pmf", ACTION=="change", ENV{EVENT_ID}=="3", RUN+="/bin/loginctl lock-sessions" + +EVENT_ID values: +1= Put the system to S0i3/S2Idle +2= Put the system to hibernate +3= Lock the screen + diff --git a/drivers/platform/x86/amd/pmf/pmf.h b/drivers/platform/x86/amd/pmf/pmf.h index 897f61b75e2f..c5334f1177a4 100644 --- a/drivers/platform/x86/amd/pmf/pmf.h +++ b/drivers/platform/x86/amd/pmf/pmf.h @@ -70,6 +70,7 @@ #define PMF_POLICY_STT_MIN 6 #define PMF_POLICY_STT_SKINTEMP_APU 7 #define PMF_POLICY_STT_SKINTEMP_HS2 8 +#define PMF_POLICY_SYSTEM_STATE 9 #define PMF_POLICY_P3T 38 /* TA macros */ @@ -436,6 +437,13 @@ struct apmf_dyn_slider_output { } __packed; /* Smart PC - TA internals */ +enum system_state { + SYSTEM_STATE__S0i3 = 1, + SYSTEM_STATE__S4, + SYSTEM_STATE__SCREEN_LOCK, + SYSTEM_STATE__MAX +}; + enum ta_slider { TA_BEST_BATTERY, /* Best Battery */ TA_BETTER_BATTERY, /* Better Battery */ @@ -467,6 +475,7 @@ enum ta_pmf_error_type { }; struct pmf_action_table { + enum system_state system_state; unsigned long spl; /* in mW */ unsigned long sppt; /* in mW */ unsigned long sppt_apuonly; /* in mW */ diff --git a/drivers/platform/x86/amd/pmf/tee-if.c b/drivers/platform/x86/amd/pmf/tee-if.c index 883dd143375a..1629856c20b4 100644 --- a/drivers/platform/x86/amd/pmf/tee-if.c +++ b/drivers/platform/x86/amd/pmf/tee-if.c @@ -24,6 +24,20 @@ MODULE_PARM_DESC(pb_actions_ms, "Policy binary actions sampling frequency (defau static const uuid_t amd_pmf_ta_uuid = UUID_INIT(0x6fd93b77, 0x3fb8, 0x524d, 0xb1, 0x2d, 0xc5, 0x29, 0xb1, 0x3d, 0x85, 0x43); +static const char *amd_pmf_uevent_as_str(unsigned int state) +{ + switch (state) { + case SYSTEM_STATE__S0i3: + return "S0i3"; + case SYSTEM_STATE__S4: + return "S4"; + case SYSTEM_STATE__SCREEN_LOCK: + return "SCREEN_LOCK"; + default: + return "Unknown Smart PC event"; + } +} + static void amd_pmf_prepare_args(struct amd_pmf_dev *dev, int cmd, struct tee_ioctl_invoke_arg *arg, struct tee_param *param) @@ -42,9 +56,23 @@ static void amd_pmf_prepare_args(struct amd_pmf_dev *dev, int cmd, param[0].u.memref.shm_offs = 0; } +static int amd_pmf_update_uevents(struct amd_pmf_dev *dev, u16 event) +{ + char *envp[2] = {}; + + envp[0] = kasprintf(GFP_KERNEL, "EVENT_ID=%d", event); + if (!envp[0]) + return -EINVAL; + + kobject_uevent_env(&dev->dev->kobj, KOBJ_CHANGE, envp); + + kfree(envp[0]); + return 0; +} + static void amd_pmf_apply_policies(struct amd_pmf_dev *dev, struct ta_pmf_enact_result *out) { - u32 val; + u32 val, event = 0; int idx; for (idx = 0; idx < out->actions_count; idx++) { @@ -113,6 +141,16 @@ static void amd_pmf_apply_policies(struct amd_pmf_dev *dev, struct ta_pmf_enact_ dev->prev_data->p3t_limit = val; } break; + + case PMF_POLICY_SYSTEM_STATE: + event = val + 1; + if (dev->prev_data->system_state != event) { + amd_pmf_update_uevents(dev, event); + dev_dbg(dev->dev, "update SYSTEM_STATE : %s\n", + amd_pmf_uevent_as_str(event)); + dev->prev_data->system_state = 0; + } + break; } } }