[PATCH v8 11/16] platform/x86: lenovo-wmi-other: Add missing CPU tunable attributes

Derek J. Clark
2026-04-06T20:14:12Z

Use an enum for all device ID's and CPU attribute feature ID's,
add missing CPU attributes.

Reviewed-by: Rong Zhang <i@rong.moe>
Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Signed-off-by: Derek J. Clark <derekjohn.clark@gmail.com>
---
v7:
- Fix typo in documentation.
v4:
- Align type ID defines.
- Align CPU feature enum values.
- remove cpu_oc_stat from Documentation.
v3:
- Remove cpu_oc_stat.
---
.../wmi/devices/lenovo-wmi-other.rst | 9 ++
drivers/platform/x86/lenovo/wmi-capdata.h | 5 +-
drivers/platform/x86/lenovo/wmi-other.c | 99 ++++++++++++++++++-
3 files changed, 107 insertions(+), 6 deletions(-)

diff --git a/Documentation/wmi/devices/lenovo-wmi-other.rst b/Documentation/wmi/devices/lenovo-wmi-other.rst
index 01d471156738..189dd4d31926 100644
--- a/Documentation/wmi/devices/lenovo-wmi-other.rst
+++ b/Documentation/wmi/devices/lenovo-wmi-other.rst
@@ -68,9 +68,18 @@ Each attribute has the following properties:
- type

The following firmware-attributes are implemented:
+ - cpu_temp: CPU Thermal Load Limit
+ - ppt_cpu_cl: CPU Cross Loading Power Limit
+ - ppt_pl1_apu_spl: Platform Profile Tracking APU Sustained Power Limit
- ppt_pl1_spl: Platform Profile Tracking Sustained Power Limit
+ - ppt_pl1_spl_cl: Platform Profile Tracking Cross Loading Sustained Power Limit
+ - ppt_pl1_tau: Exceed Duration for Platform Profile Tracking Sustained Power Limit
- ppt_pl2_sppt: Platform Profile Tracking Slow Package Power Tracking
+ - ppt_pl2_sppt_cl: Platform Profile Tracking Cross Loading Slow Package Tracking
- ppt_pl3_fppt: Platform Profile Tracking Fast Package Power Tracking
+ - ppt_pl3_fppt_cl: Platform Profile Tracking Cross Loading Fast Package Power Tracking
+ - ppt_pl4_ipl: Platform Profile Tracking Instantaneous Power Limit
+ - ppt_pl4_ipl_cl: Platform Profile Tracking Cross Loading Instantaneous Power Limit

LENOVO_FAN_TEST_DATA
-------------------------
diff --git a/drivers/platform/x86/lenovo/wmi-capdata.h b/drivers/platform/x86/lenovo/wmi-capdata.h
index 1388eaf4ab4a..f2d45cd7a188 100644
--- a/drivers/platform/x86/lenovo/wmi-capdata.h
+++ b/drivers/platform/x86/lenovo/wmi-capdata.h
@@ -18,7 +18,10 @@
#define LWMI_ATTR_MODE_ID_MASK GENMASK(15, 8)
#define LWMI_ATTR_TYPE_ID_MASK GENMASK(7, 0)

-#define LWMI_DEVICE_ID_FAN 0x04
+enum lwmi_device_id {
+ LWMI_DEVICE_ID_CPU = 0x01,
+ LWMI_DEVICE_ID_FAN = 0x04,
+};

#define LWMI_TYPE_ID_NONE 0x00

diff --git a/drivers/platform/x86/lenovo/wmi-other.c b/drivers/platform/x86/lenovo/wmi-other.c
index 19a072bea2d4..56c8b84f306d 100644
--- a/drivers/platform/x86/lenovo/wmi-other.c
+++ b/drivers/platform/x86/lenovo/wmi-other.c
@@ -50,14 +50,21 @@

#define LENOVO_OTHER_MODE_GUID "DC2A8805-3A8C-41BA-A6F7-092E0089CD3B"

-#define LWMI_DEVICE_ID_CPU 0x01
-
-#define LWMI_FEATURE_ID_CPU_SPPT 0x01
-#define LWMI_FEATURE_ID_CPU_SPL 0x02
-#define LWMI_FEATURE_ID_CPU_FPPT 0x03
+enum lwmi_feature_id_cpu {
+ LWMI_FEATURE_ID_CPU_SPPT = 0x01,
+ LWMI_FEATURE_ID_CPU_SPL = 0x02,
+ LWMI_FEATURE_ID_CPU_FPPT = 0x03,
+ LWMI_FEATURE_ID_CPU_TEMP = 0x04,
+ LWMI_FEATURE_ID_CPU_APU = 0x05,
+ LWMI_FEATURE_ID_CPU_CL = 0x06,
+ LWMI_FEATURE_ID_CPU_TAU = 0x07,
+ LWMI_FEATURE_ID_CPU_IPL = 0x09,
+};

#define LWMI_FEATURE_ID_FAN_RPM 0x03

+#define LWMI_TYPE_ID_CROSSLOAD 0x01
+
#define LWMI_FEATURE_VALUE_GET 17
#define LWMI_FEATURE_VALUE_SET 18

@@ -551,18 +558,72 @@ static struct tunable_attr_01 ppt_pl1_spl = {
.type_id = LWMI_TYPE_ID_NONE,
};

+static struct tunable_attr_01 ppt_pl1_spl_cl = {
+ .device_id = LWMI_DEVICE_ID_CPU,
+ .feature_id = LWMI_FEATURE_ID_CPU_SPL,
+ .type_id = LWMI_TYPE_ID_CROSSLOAD,
+};
+
static struct tunable_attr_01 ppt_pl2_sppt = {
.device_id = LWMI_DEVICE_ID_CPU,
.feature_id = LWMI_FEATURE_ID_CPU_SPPT,
.type_id = LWMI_TYPE_ID_NONE,
};

+static struct tunable_attr_01 ppt_pl2_sppt_cl = {
+ .device_id = LWMI_DEVICE_ID_CPU,
+ .feature_id = LWMI_FEATURE_ID_CPU_SPPT,
+ .type_id = LWMI_TYPE_ID_CROSSLOAD,
+};
+
static struct tunable_attr_01 ppt_pl3_fppt = {
.device_id = LWMI_DEVICE_ID_CPU,
.feature_id = LWMI_FEATURE_ID_CPU_FPPT,
.type_id = LWMI_TYPE_ID_NONE,
};

+static struct tunable_attr_01 ppt_pl3_fppt_cl = {
+ .device_id = LWMI_DEVICE_ID_CPU,
+ .feature_id = LWMI_FEATURE_ID_CPU_FPPT,
+ .type_id = LWMI_TYPE_ID_CROSSLOAD,
+};
+
+static struct tunable_attr_01 cpu_temp = {
+ .device_id = LWMI_DEVICE_ID_CPU,
+ .feature_id = LWMI_FEATURE_ID_CPU_TEMP,
+ .type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 ppt_pl1_apu_spl = {
+ .device_id = LWMI_DEVICE_ID_CPU,
+ .feature_id = LWMI_FEATURE_ID_CPU_APU,
+ .type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 ppt_cpu_cl = {
+ .device_id = LWMI_DEVICE_ID_CPU,
+ .feature_id = LWMI_FEATURE_ID_CPU_CL,
+ .type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 ppt_pl1_tau = {
+ .device_id = LWMI_DEVICE_ID_CPU,
+ .feature_id = LWMI_FEATURE_ID_CPU_TAU,
+ .type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 ppt_pl4_ipl = {
+ .device_id = LWMI_DEVICE_ID_CPU,
+ .feature_id = LWMI_FEATURE_ID_CPU_IPL,
+ .type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 ppt_pl4_ipl_cl = {
+ .device_id = LWMI_DEVICE_ID_CPU,
+ .feature_id = LWMI_FEATURE_ID_CPU_IPL,
+ .type_id = LWMI_TYPE_ID_CROSSLOAD,
+};
+
struct capdata01_attr_group {
const struct attribute_group *attr_group;
struct tunable_attr_01 *tunable_attr;
@@ -898,17 +959,45 @@ static bool lwmi_attr_01_is_supported(struct tunable_attr_01 *tunable_attr)
.name = _fsname, .attrs = _attrname##_attrs \
}

+LWMI_ATTR_GROUP_TUNABLE_CAP01(cpu_temp, "cpu_temp",
+ "Set the CPU thermal load limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_cpu_cl, "ppt_cpu_cl",
+ "Set the CPU cross loading power limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl1_apu_spl, "ppt_pl1_apu_spl",
+ "Set the APU sustained power limit");
LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl1_spl, "ppt_pl1_spl",
"Set the CPU sustained power limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl1_spl_cl, "ppt_pl1_spl_cl",
+ "Set the CPU cross loading sustained power limit");
LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl2_sppt, "ppt_pl2_sppt",
"Set the CPU slow package power tracking limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl2_sppt_cl, "ppt_pl2_sppt_cl",
+ "Set the CPU cross loading slow package power tracking limit");
LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl3_fppt, "ppt_pl3_fppt",
"Set the CPU fast package power tracking limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl3_fppt_cl, "ppt_pl3_fppt_cl",
+ "Set the CPU cross loading fast package power tracking limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl1_tau, "ppt_pl1_tau",
+ "Set the CPU sustained power limit exceed duration");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl4_ipl, "ppt_pl4_ipl",
+ "Set the CPU instantaneous power limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl4_ipl_cl, "ppt_pl4_ipl_cl",
+ "Set the CPU cross loading instantaneous power limit");
+

static struct capdata01_attr_group cd01_attr_groups[] = {
+ { &cpu_temp_attr_group, &cpu_temp },
+ { &ppt_cpu_cl_attr_group, &ppt_cpu_cl },
+ { &ppt_pl1_apu_spl_attr_group, &ppt_pl1_apu_spl },
{ &ppt_pl1_spl_attr_group, &ppt_pl1_spl },
+ { &ppt_pl1_spl_cl_attr_group, &ppt_pl1_spl_cl },
+ { &ppt_pl1_tau_attr_group, &ppt_pl1_tau },
{ &ppt_pl2_sppt_attr_group, &ppt_pl2_sppt },
+ { &ppt_pl2_sppt_cl_attr_group, &ppt_pl2_sppt_cl },
{ &ppt_pl3_fppt_attr_group, &ppt_pl3_fppt },
+ { &ppt_pl3_fppt_cl_attr_group, &ppt_pl3_fppt_cl },
+ { &ppt_pl4_ipl_attr_group, &ppt_pl4_ipl },
+ { &ppt_pl4_ipl_cl_attr_group, &ppt_pl4_ipl_cl },
{},
};

--
2.53.0