From dc85db256d47062955145264df5923f03b85b0c6 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Fri, 1 Jun 2018 12:28:14 -0500 Subject: drm/doc: Add amdgpu hwmon/power documentation (v2) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Document the hwmon and power control interfaces exposed by the amdgpu driver. v2: use section rather than chapter for now Reviewed-by: Michel Dänzer Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 45 ++++++++++++++++++++++++++++------ 1 file changed, 37 insertions(+), 8 deletions(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c index b455da487782..f667cb9eb614 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c @@ -80,12 +80,15 @@ void amdgpu_pm_acpi_event_handler(struct amdgpu_device *adev) /** * DOC: power_dpm_state * - * This is a legacy interface and is only provided for backwards compatibility. - * The amdgpu driver provides a sysfs API for adjusting certain power - * related parameters. The file power_dpm_state is used for this. + * The power_dpm_state file is a legacy interface and is only provided for + * backwards compatibility. The amdgpu driver provides a sysfs API for adjusting + * certain power related parameters. The file power_dpm_state is used for this. * It accepts the following arguments: + * * - battery + * * - balanced + * * - performance * * battery @@ -169,14 +172,21 @@ fail: * The amdgpu driver provides a sysfs API for adjusting certain power * related parameters. The file power_dpm_force_performance_level is * used for this. It accepts the following arguments: + * * - auto + * * - low + * * - high + * * - manual - * - GPU fan + * * - profile_standard + * * - profile_min_sclk + * * - profile_min_mclk + * * - profile_peak * * auto @@ -463,8 +473,11 @@ static ssize_t amdgpu_set_pp_table(struct device *dev, * this. * * Reading the file will display: + * * - a list of engine clock levels and voltages labeled OD_SCLK + * * - a list of memory clock levels and voltages labeled OD_MCLK + * * - a list of valid ranges for sclk, mclk, and voltage labeled OD_RANGE * * To manually adjust these settings, first select manual using @@ -1285,35 +1298,51 @@ static ssize_t amdgpu_hwmon_set_power_cap(struct device *dev, * DOC: hwmon * * The amdgpu driver exposes the following sensor interfaces: + * * - GPU temperature (via the on-die sensor) + * * - GPU voltage + * * - Northbridge voltage (APUs only) + * * - GPU power + * * - GPU fan * * hwmon interfaces for GPU temperature: + * * - temp1_input: the on die GPU temperature in millidegrees Celsius + * * - temp1_crit: temperature critical max value in millidegrees Celsius + * * - temp1_crit_hyst: temperature hysteresis for critical limit in millidegrees Celsius * * hwmon interfaces for GPU voltage: + * * - in0_input: the voltage on the GPU in millivolts + * * - in1_input: the voltage on the Northbridge in millivolts * * hwmon interfaces for GPU power: + * * - power1_average: average power used by the GPU in microWatts + * * - power1_cap_min: minimum cap supported in microWatts + * * - power1_cap_max: maximum cap supported in microWatts + * * - power1_cap: selected power cap in microWatts * * hwmon interfaces for GPU fan: + * * - pwm1: pulse width modulation fan level (0-255) - * - pwm1_enable: pulse width modulation fan control method - * 0: no fan speed control - * 1: manual fan speed control using pwm interface - * 2: automatic fan speed control + * + * - pwm1_enable: pulse width modulation fan control method (0: no fan speed control, 1: manual fan speed control using pwm interface, 2: automatic fan speed control) + * * - pwm1_min: pulse width modulation fan control minimum level (0) + * * - pwm1_max: pulse width modulation fan control maximum level (255) + * * - fan1_input: fan speed in RPM * * You can use hwmon tools like sensors to view this information on your system. -- cgit v1.2.3 From 600ae890be59910e65b75fe25a1b900d83c0329c Mon Sep 17 00:00:00 2001 From: Rex Zhu Date: Mon, 4 Jun 2018 16:39:38 +0800 Subject: drm/amdgpu: Use real power source in powerplay instand of hardcode 1. move ac_power to struct pm from dpm, so can be shared with powerplay 2. remove power_source in powerplay, use adev->pm.ac_power instand. 3. update ac_power before dispatch power task. Reviewed-by: Alex Deucher Signed-off-by: Rex Zhu Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 21 +++++++------ drivers/gpu/drm/amd/amdgpu/ci_dpm.c | 12 ++++---- drivers/gpu/drm/amd/amdgpu/kv_dpm.c | 2 +- drivers/gpu/drm/amd/amdgpu/si_dpm.c | 4 +-- drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c | 1 - drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c | 6 ++-- drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c | 5 +-- drivers/gpu/drm/amd/powerplay/inc/hwmgr.h | 2 -- .../gpu/drm/amd/powerplay/inc/pp_power_source.h | 36 ---------------------- 10 files changed, 27 insertions(+), 64 deletions(-) delete mode 100644 drivers/gpu/drm/amd/powerplay/inc/pp_power_source.h (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h index dd6203a0a6b7..9acfbee91c40 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h @@ -402,7 +402,6 @@ struct amdgpu_dpm { u32 tdp_adjustment; u16 load_line_slope; bool power_control; - bool ac_power; /* special states active */ bool thermal_active; bool uvd_active; @@ -439,6 +438,7 @@ struct amdgpu_pm { struct amd_pp_display_configuration pm_display_cfg;/* set by dc */ uint32_t smu_prv_buffer_size; struct amdgpu_bo *smu_prv_buffer; + bool ac_power; }; #define R600_SSTU_DFLT 0 diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c index f667cb9eb614..113edffb5960 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c @@ -68,11 +68,11 @@ void amdgpu_pm_acpi_event_handler(struct amdgpu_device *adev) if (adev->pm.dpm_enabled) { mutex_lock(&adev->pm.mutex); if (power_supply_is_system_supplied() > 0) - adev->pm.dpm.ac_power = true; + adev->pm.ac_power = true; else - adev->pm.dpm.ac_power = false; + adev->pm.ac_power = false; if (adev->powerplay.pp_funcs->enable_bapm) - amdgpu_dpm_enable_bapm(adev, adev->pm.dpm.ac_power); + amdgpu_dpm_enable_bapm(adev, adev->pm.ac_power); mutex_unlock(&adev->pm.mutex); } } @@ -1907,6 +1907,14 @@ void amdgpu_pm_compute_clocks(struct amdgpu_device *adev) amdgpu_fence_wait_empty(ring); } + mutex_lock(&adev->pm.mutex); + /* update battery/ac status */ + if (power_supply_is_system_supplied() > 0) + adev->pm.ac_power = true; + else + adev->pm.ac_power = false; + mutex_unlock(&adev->pm.mutex); + if (adev->powerplay.pp_funcs->dispatch_tasks) { if (!amdgpu_device_has_dc_support(adev)) { mutex_lock(&adev->pm.mutex); @@ -1927,14 +1935,7 @@ void amdgpu_pm_compute_clocks(struct amdgpu_device *adev) } else { mutex_lock(&adev->pm.mutex); amdgpu_dpm_get_active_displays(adev); - /* update battery/ac status */ - if (power_supply_is_system_supplied() > 0) - adev->pm.dpm.ac_power = true; - else - adev->pm.dpm.ac_power = false; - amdgpu_dpm_change_power_state_locked(adev); - mutex_unlock(&adev->pm.mutex); } } diff --git a/drivers/gpu/drm/amd/amdgpu/ci_dpm.c b/drivers/gpu/drm/amd/amdgpu/ci_dpm.c index a266dcf5daed..b6248c0578a1 100644 --- a/drivers/gpu/drm/amd/amdgpu/ci_dpm.c +++ b/drivers/gpu/drm/amd/amdgpu/ci_dpm.c @@ -951,12 +951,12 @@ static void ci_apply_state_adjust_rules(struct amdgpu_device *adev, else pi->battery_state = false; - if (adev->pm.dpm.ac_power) + if (adev->pm.ac_power) max_limits = &adev->pm.dpm.dyn_state.max_clock_voltage_on_ac; else max_limits = &adev->pm.dpm.dyn_state.max_clock_voltage_on_dc; - if (adev->pm.dpm.ac_power == false) { + if (adev->pm.ac_power == false) { for (i = 0; i < ps->performance_level_count; i++) { if (ps->performance_levels[i].mclk > max_limits->mclk) ps->performance_levels[i].mclk = max_limits->mclk; @@ -4078,7 +4078,7 @@ static int ci_enable_uvd_dpm(struct amdgpu_device *adev, bool enable) const struct amdgpu_clock_and_voltage_limits *max_limits; int i; - if (adev->pm.dpm.ac_power) + if (adev->pm.ac_power) max_limits = &adev->pm.dpm.dyn_state.max_clock_voltage_on_ac; else max_limits = &adev->pm.dpm.dyn_state.max_clock_voltage_on_dc; @@ -4127,7 +4127,7 @@ static int ci_enable_vce_dpm(struct amdgpu_device *adev, bool enable) const struct amdgpu_clock_and_voltage_limits *max_limits; int i; - if (adev->pm.dpm.ac_power) + if (adev->pm.ac_power) max_limits = &adev->pm.dpm.dyn_state.max_clock_voltage_on_ac; else max_limits = &adev->pm.dpm.dyn_state.max_clock_voltage_on_dc; @@ -4160,7 +4160,7 @@ static int ci_enable_samu_dpm(struct amdgpu_device *adev, bool enable) const struct amdgpu_clock_and_voltage_limits *max_limits; int i; - if (adev->pm.dpm.ac_power) + if (adev->pm.ac_power) max_limits = &adev->pm.dpm.dyn_state.max_clock_voltage_on_ac; else max_limits = &adev->pm.dpm.dyn_state.max_clock_voltage_on_dc; @@ -4191,7 +4191,7 @@ static int ci_enable_acp_dpm(struct amdgpu_device *adev, bool enable) const struct amdgpu_clock_and_voltage_limits *max_limits; int i; - if (adev->pm.dpm.ac_power) + if (adev->pm.ac_power) max_limits = &adev->pm.dpm.dyn_state.max_clock_voltage_on_ac; else max_limits = &adev->pm.dpm.dyn_state.max_clock_voltage_on_dc; diff --git a/drivers/gpu/drm/amd/amdgpu/kv_dpm.c b/drivers/gpu/drm/amd/amdgpu/kv_dpm.c index 17f7f074cedc..d79e6f5234da 100644 --- a/drivers/gpu/drm/amd/amdgpu/kv_dpm.c +++ b/drivers/gpu/drm/amd/amdgpu/kv_dpm.c @@ -1921,7 +1921,7 @@ static int kv_dpm_set_power_state(void *handle) int ret; if (pi->bapm_enable) { - ret = amdgpu_kv_smc_bapm_enable(adev, adev->pm.dpm.ac_power); + ret = amdgpu_kv_smc_bapm_enable(adev, adev->pm.ac_power); if (ret) { DRM_ERROR("amdgpu_kv_smc_bapm_enable failed\n"); return ret; diff --git a/drivers/gpu/drm/amd/amdgpu/si_dpm.c b/drivers/gpu/drm/amd/amdgpu/si_dpm.c index b12d7c9d42a0..9567dd0a01bc 100644 --- a/drivers/gpu/drm/amd/amdgpu/si_dpm.c +++ b/drivers/gpu/drm/amd/amdgpu/si_dpm.c @@ -3480,7 +3480,7 @@ static void si_apply_state_adjust_rules(struct amdgpu_device *adev, disable_sclk_switching = true; } - if (adev->pm.dpm.ac_power) + if (adev->pm.ac_power) max_limits = &adev->pm.dpm.dyn_state.max_clock_voltage_on_ac; else max_limits = &adev->pm.dpm.dyn_state.max_clock_voltage_on_dc; @@ -3489,7 +3489,7 @@ static void si_apply_state_adjust_rules(struct amdgpu_device *adev, if (ps->performance_levels[i].vddc > ps->performance_levels[i+1].vddc) ps->performance_levels[i].vddc = ps->performance_levels[i+1].vddc; } - if (adev->pm.dpm.ac_power == false) { + if (adev->pm.ac_power == false) { for (i = 0; i < ps->performance_level_count; i++) { if (ps->performance_levels[i].mclk > max_limits->mclk) ps->performance_levels[i].mclk = max_limits->mclk; diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c index 4ef77cebc628..9b675d9bd162 100644 --- a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c @@ -81,7 +81,6 @@ int hwmgr_early_init(struct pp_hwmgr *hwmgr) return -EINVAL; hwmgr->usec_timeout = AMD_MAX_USEC_TIMEOUT; - hwmgr->power_source = PP_PowerSource_AC; hwmgr->pp_table_version = PP_TABLE_V1; hwmgr->dpm_level = AMD_DPM_FORCED_LEVEL_AUTO; hwmgr->request_dpm_level = AMD_DPM_FORCED_LEVEL_AUTO; diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c index 24d20d9c74b4..b89d6fb8559b 100644 --- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c @@ -2877,7 +2877,7 @@ static int smu7_apply_state_adjust_rules(struct pp_hwmgr *hwmgr, struct pp_power_state *request_ps, const struct pp_power_state *current_ps) { - + struct amdgpu_device *adev = hwmgr->adev; struct smu7_power_state *smu7_ps = cast_phw_smu7_power_state(&request_ps->hardware); uint32_t sclk; @@ -2900,12 +2900,12 @@ static int smu7_apply_state_adjust_rules(struct pp_hwmgr *hwmgr, "VI should always have 2 performance levels", ); - max_limits = (PP_PowerSource_AC == hwmgr->power_source) ? + max_limits = adev->pm.ac_power ? &(hwmgr->dyn_state.max_clock_voltage_on_ac) : &(hwmgr->dyn_state.max_clock_voltage_on_dc); /* Cap clock DPM tables at DC MAX if it is in DC. */ - if (PP_PowerSource_DC == hwmgr->power_source) { + if (!adev->pm.ac_power) { for (i = 0; i < smu7_ps->performance_level_count; i++) { if (smu7_ps->performance_levels[i].memory_clock > max_limits->mclk) smu7_ps->performance_levels[i].memory_clock = max_limits->mclk; diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c index 66fd1a43e346..3b8d36df52e9 100644 --- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c @@ -3102,6 +3102,7 @@ static int vega10_apply_state_adjust_rules(struct pp_hwmgr *hwmgr, struct pp_power_state *request_ps, const struct pp_power_state *current_ps) { + struct amdgpu_device *adev = hwmgr->adev; struct vega10_power_state *vega10_ps = cast_phw_vega10_power_state(&request_ps->hardware); uint32_t sclk; @@ -3127,12 +3128,12 @@ static int vega10_apply_state_adjust_rules(struct pp_hwmgr *hwmgr, if (vega10_ps->performance_level_count != 2) pr_info("VI should always have 2 performance levels"); - max_limits = (PP_PowerSource_AC == hwmgr->power_source) ? + max_limits = adev->pm.ac_power ? &(hwmgr->dyn_state.max_clock_voltage_on_ac) : &(hwmgr->dyn_state.max_clock_voltage_on_dc); /* Cap clock DPM tables at DC MAX if it is in DC. */ - if (PP_PowerSource_DC == hwmgr->power_source) { + if (!adev->pm.ac_power) { for (i = 0; i < vega10_ps->performance_level_count; i++) { if (vega10_ps->performance_levels[i].mem_clock > max_limits->mclk) diff --git a/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h b/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h index b99fb8ac822c..40c98ca5feb7 100644 --- a/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h +++ b/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h @@ -26,7 +26,6 @@ #include #include "amd_powerplay.h" #include "hardwaremanager.h" -#include "pp_power_source.h" #include "hwmgr_ppt.h" #include "ppatomctrl.h" #include "hwmgr_ppt.h" @@ -741,7 +740,6 @@ struct pp_hwmgr { const struct pp_table_func *pptable_func; struct pp_power_state *ps; - enum pp_power_source power_source; uint32_t num_ps; struct pp_thermal_controller_info thermal_controller; bool fan_ctrl_is_in_default_mode; diff --git a/drivers/gpu/drm/amd/powerplay/inc/pp_power_source.h b/drivers/gpu/drm/amd/powerplay/inc/pp_power_source.h deleted file mode 100644 index b43315cc5d58..000000000000 --- a/drivers/gpu/drm/amd/powerplay/inc/pp_power_source.h +++ /dev/null @@ -1,36 +0,0 @@ -/* - * Copyright 2015 Advanced Micro Devices, Inc. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR - * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, - * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR - * OTHER DEALINGS IN THE SOFTWARE. - * - */ - -#ifndef PP_POWERSOURCE_H -#define PP_POWERSOURCE_H - -enum pp_power_source { - PP_PowerSource_AC = 0, - PP_PowerSource_DC, - PP_PowerSource_LimitedPower, - PP_PowerSource_LimitedPower_2, - PP_PowerSource_Max -}; - - -#endif -- cgit v1.2.3 From b374d82dca4721c534eb940b599dd4d45ba3a18f Mon Sep 17 00:00:00 2001 From: Tom St Denis Date: Wed, 20 Jun 2018 07:55:39 -0400 Subject: drm/amd/amdgpu: Add a GPU_LOAD entry to sysfs (v3) This adds what should be a stable interface to read GPU load from userspace. (v2): Fix comments and name of file per recommendations. (v3): Add chapter to amdgpu.rst as well. Signed-off-by: Tom St Denis Acked-by: Slava Abramov Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher --- Documentation/gpu/amdgpu.rst | 5 +++++ drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 40 ++++++++++++++++++++++++++++++++++ 2 files changed, 45 insertions(+) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c') diff --git a/Documentation/gpu/amdgpu.rst b/Documentation/gpu/amdgpu.rst index e52d0ce186fe..765c2a32938f 100644 --- a/Documentation/gpu/amdgpu.rst +++ b/Documentation/gpu/amdgpu.rst @@ -115,3 +115,8 @@ pp_power_profile_mode .. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c :doc: pp_power_profile_mode +busy_percent +~~~~~~~~~~~~ + +.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c + :doc: busy_percent diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c index 113edffb5960..fdb399821915 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c @@ -918,6 +918,36 @@ fail: return -EINVAL; } +/** + * DOC: busy_percent + * + * The amdgpu driver provides a sysfs API for reading how busy the GPU + * is as a percentage. The file gpu_busy_percent is used for this. + * The SMU firmware computes a percentage of load based on the + * aggregate activity level in the IP cores. + */ +static ssize_t amdgpu_get_busy_percent(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct drm_device *ddev = dev_get_drvdata(dev); + struct amdgpu_device *adev = ddev->dev_private; + int r, value, size = sizeof(value); + + /* sanity check PP is enabled */ + if (!(adev->powerplay.pp_funcs && + adev->powerplay.pp_funcs->read_sensor)) + return -EINVAL; + + /* read the IP busy sensor */ + r = amdgpu_dpm_read_sensor(adev, AMDGPU_PP_SENSOR_GPU_LOAD, + (void *)&value, &size); + if (r) + return r; + + return snprintf(buf, PAGE_SIZE, "%d\n", value); +} + static DEVICE_ATTR(power_dpm_state, S_IRUGO | S_IWUSR, amdgpu_get_dpm_state, amdgpu_set_dpm_state); static DEVICE_ATTR(power_dpm_force_performance_level, S_IRUGO | S_IWUSR, amdgpu_get_dpm_forced_performance_level, @@ -951,6 +981,8 @@ static DEVICE_ATTR(pp_power_profile_mode, S_IRUGO | S_IWUSR, static DEVICE_ATTR(pp_od_clk_voltage, S_IRUGO | S_IWUSR, amdgpu_get_pp_od_clk_voltage, amdgpu_set_pp_od_clk_voltage); +static DEVICE_ATTR(gpu_busy_percent, S_IRUGO, + amdgpu_get_busy_percent, NULL); static ssize_t amdgpu_hwmon_show_temp(struct device *dev, struct device_attribute *attr, @@ -1854,6 +1886,13 @@ int amdgpu_pm_sysfs_init(struct amdgpu_device *adev) "pp_od_clk_voltage\n"); return ret; } + ret = device_create_file(adev->dev, + &dev_attr_gpu_busy_percent); + if (ret) { + DRM_ERROR("failed to create device file " + "gpu_busy_level\n"); + return ret; + } ret = amdgpu_debugfs_pm_init(adev); if (ret) { DRM_ERROR("Failed to register debugfs file for dpm!\n"); @@ -1889,6 +1928,7 @@ void amdgpu_pm_sysfs_fini(struct amdgpu_device *adev) &dev_attr_pp_power_profile_mode); device_remove_file(adev->dev, &dev_attr_pp_od_clk_voltage); + device_remove_file(adev->dev, &dev_attr_gpu_busy_percent); } void amdgpu_pm_compute_clocks(struct amdgpu_device *adev) -- cgit v1.2.3 From b92c628712ed3a1cf5d4a144290e8ffc170bf51e Mon Sep 17 00:00:00 2001 From: Rex Zhu Date: Tue, 5 Jun 2018 13:06:11 +0800 Subject: drm/amd/pp: Unify powergate_uvd/vce/mmhub to set_powergating_by_smu Some HW ip blocks need call SMU to enter/leave power gate state. So export common set_powergating_by_smu interface. 1. keep consistent with set_clockgating_by_smu 2. scales easily to powergate other ip(gfx) if necessary Reviewed-by: Evan Quan Signed-off-by: Rex Zhu Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h | 14 ++++--------- drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 8 +++---- drivers/gpu/drm/amd/amdgpu/ci_dpm.c | 15 ++++++++++++- drivers/gpu/drm/amd/amdgpu/kv_dpm.c | 15 ++++++++++++- drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c | 4 ++-- drivers/gpu/drm/amd/include/kgd_pp_interface.h | 5 ++--- drivers/gpu/drm/amd/powerplay/amd_powerplay.c | 29 +++++++++++++++++++++++--- 7 files changed, 66 insertions(+), 24 deletions(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h index c6d692625687..ff24e1cc5b65 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h @@ -287,12 +287,6 @@ enum amdgpu_pcie_gen { #define amdgpu_dpm_force_performance_level(adev, l) \ ((adev)->powerplay.pp_funcs->force_performance_level((adev)->powerplay.pp_handle, (l))) -#define amdgpu_dpm_powergate_uvd(adev, g) \ - ((adev)->powerplay.pp_funcs->powergate_uvd((adev)->powerplay.pp_handle, (g))) - -#define amdgpu_dpm_powergate_vce(adev, g) \ - ((adev)->powerplay.pp_funcs->powergate_vce((adev)->powerplay.pp_handle, (g))) - #define amdgpu_dpm_get_current_power_state(adev) \ ((adev)->powerplay.pp_funcs->get_current_power_state((adev)->powerplay.pp_handle)) @@ -347,6 +341,10 @@ enum amdgpu_pcie_gen { ((adev)->powerplay.pp_funcs->set_clockgating_by_smu(\ (adev)->powerplay.pp_handle, msg_id)) +#define amdgpu_dpm_set_powergating_by_smu(adev, block_type, gate) \ + ((adev)->powerplay.pp_funcs->set_powergating_by_smu(\ + (adev)->powerplay.pp_handle, block_type, gate)) + #define amdgpu_dpm_get_power_profile_mode(adev, buf) \ ((adev)->powerplay.pp_funcs->get_power_profile_mode(\ (adev)->powerplay.pp_handle, buf)) @@ -359,10 +357,6 @@ enum amdgpu_pcie_gen { ((adev)->powerplay.pp_funcs->odn_edit_dpm_table(\ (adev)->powerplay.pp_handle, type, parameter, size)) -#define amdgpu_dpm_powergate_mmhub(adev) \ - ((adev)->powerplay.pp_funcs->powergate_mmhub( \ - (adev)->powerplay.pp_handle)) - struct amdgpu_dpm { struct amdgpu_ps *ps; /* number of valid power states */ diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c index fdb399821915..a003fd881a89 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c @@ -1729,10 +1729,10 @@ static void amdgpu_dpm_change_power_state_locked(struct amdgpu_device *adev) void amdgpu_dpm_enable_uvd(struct amdgpu_device *adev, bool enable) { - if (adev->powerplay.pp_funcs->powergate_uvd) { + if (adev->powerplay.pp_funcs->set_powergating_by_smu) { /* enable/disable UVD */ mutex_lock(&adev->pm.mutex); - amdgpu_dpm_powergate_uvd(adev, !enable); + amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_UVD, !enable); mutex_unlock(&adev->pm.mutex); } else { if (enable) { @@ -1751,10 +1751,10 @@ void amdgpu_dpm_enable_uvd(struct amdgpu_device *adev, bool enable) void amdgpu_dpm_enable_vce(struct amdgpu_device *adev, bool enable) { - if (adev->powerplay.pp_funcs->powergate_vce) { + if (adev->powerplay.pp_funcs->set_powergating_by_smu) { /* enable/disable VCE */ mutex_lock(&adev->pm.mutex); - amdgpu_dpm_powergate_vce(adev, !enable); + amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_VCE, !enable); mutex_unlock(&adev->pm.mutex); } else { if (enable) { diff --git a/drivers/gpu/drm/amd/amdgpu/ci_dpm.c b/drivers/gpu/drm/amd/amdgpu/ci_dpm.c index c9d45cffca56..7c4ff71e7476 100644 --- a/drivers/gpu/drm/amd/amdgpu/ci_dpm.c +++ b/drivers/gpu/drm/amd/amdgpu/ci_dpm.c @@ -6767,6 +6767,19 @@ static int ci_dpm_read_sensor(void *handle, int idx, } } +static int ci_set_powergating_by_smu(void *handle, + uint32_t block_type, bool gate) +{ + switch (block_type) { + case AMD_IP_BLOCK_TYPE_UVD: + ci_dpm_powergate_uvd(handle, gate); + break; + default: + break; + } + return 0; +} + static const struct amd_ip_funcs ci_dpm_ip_funcs = { .name = "ci_dpm", .early_init = ci_dpm_early_init, @@ -6804,7 +6817,7 @@ static const struct amd_pm_funcs ci_dpm_funcs = { .debugfs_print_current_performance_level = &ci_dpm_debugfs_print_current_performance_level, .force_performance_level = &ci_dpm_force_performance_level, .vblank_too_short = &ci_dpm_vblank_too_short, - .powergate_uvd = &ci_dpm_powergate_uvd, + .set_powergating_by_smu = &ci_set_powergating_by_smu, .set_fan_control_mode = &ci_dpm_set_fan_control_mode, .get_fan_control_mode = &ci_dpm_get_fan_control_mode, .set_fan_speed_percent = &ci_dpm_set_fan_speed_percent, diff --git a/drivers/gpu/drm/amd/amdgpu/kv_dpm.c b/drivers/gpu/drm/amd/amdgpu/kv_dpm.c index 46de1fd18a7b..3f57f6463dc8 100644 --- a/drivers/gpu/drm/amd/amdgpu/kv_dpm.c +++ b/drivers/gpu/drm/amd/amdgpu/kv_dpm.c @@ -3306,6 +3306,19 @@ static int kv_dpm_read_sensor(void *handle, int idx, } } +static int kv_set_powergating_by_smu(void *handle, + uint32_t block_type, bool gate) +{ + switch (block_type) { + case AMD_IP_BLOCK_TYPE_UVD: + kv_dpm_powergate_uvd(handle, gate); + break; + default: + break; + } + return 0; +} + static const struct amd_ip_funcs kv_dpm_ip_funcs = { .name = "kv_dpm", .early_init = kv_dpm_early_init, @@ -3342,7 +3355,7 @@ static const struct amd_pm_funcs kv_dpm_funcs = { .print_power_state = &kv_dpm_print_power_state, .debugfs_print_current_performance_level = &kv_dpm_debugfs_print_current_performance_level, .force_performance_level = &kv_dpm_force_performance_level, - .powergate_uvd = &kv_dpm_powergate_uvd, + .set_powergating_by_smu = kv_set_powergating_by_smu, .enable_bapm = &kv_dpm_enable_bapm, .get_vce_clock_state = amdgpu_get_vce_clock_state, .check_state_equal = kv_check_state_equal, diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c index 377f5362a3df..e70a0d4d6db4 100644 --- a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c +++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c @@ -471,8 +471,8 @@ void mmhub_v1_0_update_power_gating(struct amdgpu_device *adev, RENG_EXECUTE_ON_REG_UPDATE, 1); WREG32_SOC15(MMHUB, 0, mmPCTL1_RENG_EXECUTE, pctl1_reng_execute); - if (adev->powerplay.pp_funcs->powergate_mmhub) - amdgpu_dpm_powergate_mmhub(adev); + if (adev->powerplay.pp_funcs->set_powergating_by_smu) + amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_GMC, true); } else { pctl0_reng_execute = REG_SET_FIELD(pctl0_reng_execute, diff --git a/drivers/gpu/drm/amd/include/kgd_pp_interface.h b/drivers/gpu/drm/amd/include/kgd_pp_interface.h index 0f9886298a84..4535756428f9 100644 --- a/drivers/gpu/drm/amd/include/kgd_pp_interface.h +++ b/drivers/gpu/drm/amd/include/kgd_pp_interface.h @@ -232,13 +232,13 @@ struct amd_pm_funcs { void (*debugfs_print_current_performance_level)(void *handle, struct seq_file *m); int (*switch_power_profile)(void *handle, enum PP_SMC_POWER_PROFILE type, bool en); /* export to amdgpu */ - void (*powergate_uvd)(void *handle, bool gate); - void (*powergate_vce)(void *handle, bool gate); struct amd_vce_state *(*get_vce_clock_state)(void *handle, u32 idx); int (*dispatch_tasks)(void *handle, enum amd_pp_task task_id, enum amd_pm_state_type *user_state); int (*load_firmware)(void *handle); int (*wait_for_fw_loading_complete)(void *handle); + int (*set_powergating_by_smu)(void *handle, + uint32_t block_type, bool gate); int (*set_clockgating_by_smu)(void *handle, uint32_t msg_id); int (*set_power_limit)(void *handle, uint32_t n); int (*get_power_limit)(void *handle, uint32_t *limit, bool default_limit); @@ -269,7 +269,6 @@ struct amd_pm_funcs { int (*get_power_profile_mode)(void *handle, char *buf); int (*set_power_profile_mode)(void *handle, long *input, uint32_t size); int (*odn_edit_dpm_table)(void *handle, uint32_t type, long *input, uint32_t size); - int (*powergate_mmhub)(void *handle); }; #endif diff --git a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c index b69da116b30c..f68551ffb1e2 100644 --- a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c +++ b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c @@ -244,6 +244,7 @@ static int pp_set_powergating_state(void *handle, /* Enable/disable GFX per cu powergating through SMU */ return hwmgr->hwmgr_func->powergate_gfx(hwmgr, state == AMD_PG_STATE_GATE); + } static int pp_suspend(void *handle) @@ -1183,14 +1184,36 @@ static int pp_dpm_powergate_mmhub(void *handle) return hwmgr->hwmgr_func->powergate_mmhub(hwmgr); } +static int pp_set_powergating_by_smu(void *handle, + uint32_t block_type, bool gate) +{ + int ret = 0; + + switch (block_type) { + case AMD_IP_BLOCK_TYPE_UVD: + case AMD_IP_BLOCK_TYPE_VCN: + pp_dpm_powergate_uvd(handle, gate); + break; + case AMD_IP_BLOCK_TYPE_VCE: + pp_dpm_powergate_vce(handle, gate); + break; + case AMD_IP_BLOCK_TYPE_GMC: + pp_dpm_powergate_mmhub(handle); + break; + case AMD_IP_BLOCK_TYPE_GFX: + break; + default: + break; + } + return ret; +} + static const struct amd_pm_funcs pp_dpm_funcs = { .load_firmware = pp_dpm_load_fw, .wait_for_fw_loading_complete = pp_dpm_fw_loading_complete, .force_performance_level = pp_dpm_force_performance_level, .get_performance_level = pp_dpm_get_performance_level, .get_current_power_state = pp_dpm_get_current_power_state, - .powergate_vce = pp_dpm_powergate_vce, - .powergate_uvd = pp_dpm_powergate_uvd, .dispatch_tasks = pp_dpm_dispatch_tasks, .set_fan_control_mode = pp_dpm_set_fan_control_mode, .get_fan_control_mode = pp_dpm_get_fan_control_mode, @@ -1210,6 +1233,7 @@ static const struct amd_pm_funcs pp_dpm_funcs = { .get_vce_clock_state = pp_dpm_get_vce_clock_state, .switch_power_profile = pp_dpm_switch_power_profile, .set_clockgating_by_smu = pp_set_clockgating_by_smu, + .set_powergating_by_smu = pp_set_powergating_by_smu, .get_power_profile_mode = pp_get_power_profile_mode, .set_power_profile_mode = pp_set_power_profile_mode, .odn_edit_dpm_table = pp_odn_edit_dpm_table, @@ -1227,5 +1251,4 @@ static const struct amd_pm_funcs pp_dpm_funcs = { .set_watermarks_for_clocks_ranges = pp_set_watermarks_for_clocks_ranges, .display_clock_voltage_request = pp_display_clock_voltage_request, .get_display_mode_validation_clocks = pp_get_display_mode_validation_clocks, - .powergate_mmhub = pp_dpm_powergate_mmhub, }; -- cgit v1.2.3 From 70eb46db101b55acdf432187800915f72962a564 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Thu, 28 Jun 2018 12:44:25 -0500 Subject: drm/amdgpu/pm: fix display count in non-DC path new_active_crtcs is a bitmask, new_active_crtc_count is the actual count. Reviewed-by: Rex Zhu Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c index a003fd881a89..f1404adc3a90 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c @@ -1959,7 +1959,7 @@ void amdgpu_pm_compute_clocks(struct amdgpu_device *adev) if (!amdgpu_device_has_dc_support(adev)) { mutex_lock(&adev->pm.mutex); amdgpu_dpm_get_active_displays(adev); - adev->pm.pm_display_cfg.num_display = adev->pm.dpm.new_active_crtcs; + adev->pm.pm_display_cfg.num_display = adev->pm.dpm.new_active_crtc_count; adev->pm.pm_display_cfg.vrefresh = amdgpu_dpm_get_vrefresh(adev); adev->pm.pm_display_cfg.min_vblank_time = amdgpu_dpm_get_vblank_time(adev); /* we have issues with mclk switching with refresh rates over 120 hz on the non-DC code. */ -- cgit v1.2.3 From 4b4bd04898ad8a315b4a8740ff4909ea995f0c65 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Wed, 20 Jun 2018 11:26:47 -0700 Subject: drm/amdgpu/pm: Remove VLA usage In the quest to remove all stack VLA usage from the kernel[1], this uses the maximum sane buffer size and removes copy/paste code. [1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com Reviewed-by: Rex Zhu Signed-off-by: Kees Cook Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 100 ++++++++++++++------------------- 1 file changed, 42 insertions(+), 58 deletions(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c index f1404adc3a90..15a1192c1ec5 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c @@ -606,40 +606,59 @@ static ssize_t amdgpu_get_pp_dpm_sclk(struct device *dev, return snprintf(buf, PAGE_SIZE, "\n"); } -static ssize_t amdgpu_set_pp_dpm_sclk(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t count) +/* + * Worst case: 32 bits individually specified, in octal at 12 characters + * per line (+1 for \n). + */ +#define AMDGPU_MASK_BUF_MAX (32 * 13) + +static ssize_t amdgpu_read_mask(const char *buf, size_t count, uint32_t *mask) { - struct drm_device *ddev = dev_get_drvdata(dev); - struct amdgpu_device *adev = ddev->dev_private; int ret; long level; - uint32_t mask = 0; char *sub_str = NULL; char *tmp; - char buf_cpy[count]; + char buf_cpy[AMDGPU_MASK_BUF_MAX + 1]; const char delimiter[3] = {' ', '\n', '\0'}; + size_t bytes; - memcpy(buf_cpy, buf, count+1); + *mask = 0; + + bytes = min(count, sizeof(buf_cpy) - 1); + memcpy(buf_cpy, buf, bytes); + buf_cpy[bytes] = '\0'; tmp = buf_cpy; while (tmp[0]) { - sub_str = strsep(&tmp, delimiter); + sub_str = strsep(&tmp, delimiter); if (strlen(sub_str)) { ret = kstrtol(sub_str, 0, &level); - - if (ret) { - count = -EINVAL; - goto fail; - } - mask |= 1 << level; + if (ret) + return -EINVAL; + *mask |= 1 << level; } else break; } + + return 0; +} + +static ssize_t amdgpu_set_pp_dpm_sclk(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t count) +{ + struct drm_device *ddev = dev_get_drvdata(dev); + struct amdgpu_device *adev = ddev->dev_private; + int ret; + uint32_t mask = 0; + + ret = amdgpu_read_mask(buf, count, &mask); + if (ret) + return ret; + if (adev->powerplay.pp_funcs->force_clock_level) amdgpu_dpm_force_clock_level(adev, PP_SCLK, mask); -fail: return count; } @@ -664,32 +683,15 @@ static ssize_t amdgpu_set_pp_dpm_mclk(struct device *dev, struct drm_device *ddev = dev_get_drvdata(dev); struct amdgpu_device *adev = ddev->dev_private; int ret; - long level; uint32_t mask = 0; - char *sub_str = NULL; - char *tmp; - char buf_cpy[count]; - const char delimiter[3] = {' ', '\n', '\0'}; - memcpy(buf_cpy, buf, count+1); - tmp = buf_cpy; - while (tmp[0]) { - sub_str = strsep(&tmp, delimiter); - if (strlen(sub_str)) { - ret = kstrtol(sub_str, 0, &level); + ret = amdgpu_read_mask(buf, count, &mask); + if (ret) + return ret; - if (ret) { - count = -EINVAL; - goto fail; - } - mask |= 1 << level; - } else - break; - } if (adev->powerplay.pp_funcs->force_clock_level) amdgpu_dpm_force_clock_level(adev, PP_MCLK, mask); -fail: return count; } @@ -714,33 +716,15 @@ static ssize_t amdgpu_set_pp_dpm_pcie(struct device *dev, struct drm_device *ddev = dev_get_drvdata(dev); struct amdgpu_device *adev = ddev->dev_private; int ret; - long level; uint32_t mask = 0; - char *sub_str = NULL; - char *tmp; - char buf_cpy[count]; - const char delimiter[3] = {' ', '\n', '\0'}; - - memcpy(buf_cpy, buf, count+1); - tmp = buf_cpy; - while (tmp[0]) { - sub_str = strsep(&tmp, delimiter); - if (strlen(sub_str)) { - ret = kstrtol(sub_str, 0, &level); + ret = amdgpu_read_mask(buf, count, &mask); + if (ret) + return ret; - if (ret) { - count = -EINVAL; - goto fail; - } - mask |= 1 << level; - } else - break; - } if (adev->powerplay.pp_funcs->force_clock_level) amdgpu_dpm_force_clock_level(adev, PP_PCIE, mask); -fail: return count; } -- cgit v1.2.3 From ccf9ef0b0d10434dec5046bcfc4e834a7b1830fd Mon Sep 17 00:00:00 2001 From: Rex Zhu Date: Wed, 25 Jul 2018 11:51:46 +0800 Subject: drm/amdgpu: fix a reversed condition This test was reversed so it would end up leading to vddnb value can't be read via hwmon on APU. Reviewed-by: Evan Quan Reviewed-by: Alex Deucher Signed-off-by: Rex Zhu Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org --- drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c index 15a1192c1ec5..23fc1d32b937 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c @@ -1185,7 +1185,7 @@ static ssize_t amdgpu_hwmon_show_vddnb(struct device *dev, int r, size = sizeof(vddnb); /* only APUs have vddnb */ - if (adev->flags & AMD_IS_APU) + if (!(adev->flags & AMD_IS_APU)) return -EINVAL; /* Can't get voltage when the card is off */ -- cgit v1.2.3 From ddf74e79a54070f277ae520722d3bab7f7a6c67a Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Mon, 23 Jul 2018 11:32:32 -0500 Subject: drm/amdgpu/pm: Fix potential Spectre v1 idx can be indirectly controlled by user-space, hence leading to a potential exploitation of the Spectre variant 1 vulnerability. This issue was detected with the help of Smatch: drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c:408 amdgpu_set_pp_force_state() warn: potential spectre issue 'data.states' Fix this by sanitizing idx before using it to index data.states Notice that given that speculation windows are large, the policy is to kill the speculation on the first load and not worry if it can be completed with a dependent load/store [1]. [1] https://marc.info/?l=linux-kernel&m=152449131114778&w=2 Cc: stable@vger.kernel.org Signed-off-by: Gustavo A. R. Silva Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c index 23fc1d32b937..8f98629fbe59 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c @@ -31,7 +31,7 @@ #include #include #include - +#include static int amdgpu_debugfs_pm_init(struct amdgpu_device *adev); @@ -403,6 +403,7 @@ static ssize_t amdgpu_set_pp_force_state(struct device *dev, count = -EINVAL; goto fail; } + idx = array_index_nospec(idx, ARRAY_SIZE(data.states)); amdgpu_dpm_get_pp_num_states(adev, &data); state = data.states[idx]; -- cgit v1.2.3