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Jones" , "Alok Tiwari" , "Derek John Clark" , "Denis Benato" Subject: [PATCH v12 5/8] platform/x86: asus-armoury: add core count control Date: Fri, 3 Oct 2025 20:55:17 +0200 Message-ID: <20251003185520.1083875-6-benato.denis96@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251003185520.1083875-1-benato.denis96@gmail.com> References: <20251003185520.1083875-1-benato.denis96@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: "Luke D. Jones" Implement Intel core enablement under the asus-armoury module using the fw_attributes class. This allows users to enable or disable preformance or efficiency cores depending on their requirements. After change a reboot is required. Signed-off-by: Denis Benato Signed-off-by: Luke D. Jones --- drivers/platform/x86/asus-armoury.c | 258 ++++++++++++++++++++- drivers/platform/x86/asus-armoury.h | 28 +++ include/linux/platform_data/x86/asus-wmi.h | 5 + 3 files changed, 290 insertions(+), 1 deletion(-) diff --git a/drivers/platform/x86/asus-armoury.c b/drivers/platform/x86/asu= s-armoury.c index e458d23d020d..4629389c4c25 100644 --- a/drivers/platform/x86/asus-armoury.c +++ b/drivers/platform/x86/asus-armoury.c @@ -45,13 +45,49 @@ #define ASUS_MINI_LED_2024_STRONG 0x01 #define ASUS_MINI_LED_2024_OFF 0x02 =20 +#define ASUS_POWER_CORE_MASK GENMASK(15, 8) +#define ASUS_PERF_CORE_MASK GENMASK(7, 0) + +enum cpu_core_type { + CPU_CORE_PERF =3D 0, + CPU_CORE_POWER, +}; + +enum cpu_core_value { + CPU_CORE_DEFAULT =3D 0, + CPU_CORE_MIN, + CPU_CORE_MAX, + CPU_CORE_CURRENT, +}; + +#define CPU_PERF_CORE_COUNT_MIN 4 +#define CPU_POWR_CORE_COUNT_MIN 0 + +/* Tunables provided by ASUS for gaming laptops */ +struct cpu_cores { + u32 cur_perf_cores; + u32 min_perf_cores; + u32 max_perf_cores; + u32 cur_power_cores; + u32 min_power_cores; + u32 max_power_cores; +}; + static struct asus_armoury_priv { struct device *fw_attr_dev; struct kset *fw_attr_kset; =20 + struct cpu_cores *cpu_cores; u32 mini_led_dev_id; u32 gpu_mux_dev_id; -} asus_armoury; + /* + * Mutex to prevent big/little core count changes writing to same + * endpoint at the same time. Must lock during attr store. + */ + struct mutex cpu_core_mutex; +} asus_armoury =3D { + .cpu_core_mutex =3D __MUTEX_INITIALIZER(asus_armoury.cpu_core_mutex) +}; =20 struct fw_attrs_group { bool pending_reboot; @@ -93,6 +129,8 @@ static struct kobj_attribute pending_reboot =3D __ATTR_R= O(pending_reboot); static bool asus_bios_requires_reboot(struct kobj_attribute *attr) { return !strcmp(attr->attr.name, "gpu_mux_mode") || + !strcmp(attr->attr.name, "cores_performance") || + !strcmp(attr->attr.name, "cores_efficiency") || !strcmp(attr->attr.name, "panel_hd_mode"); } =20 @@ -171,6 +209,12 @@ static ssize_t enum_type_show(struct kobject *kobj, st= ruct kobj_attribute *attr, return sysfs_emit(buf, "enumeration\n"); } =20 +static ssize_t int_type_show(struct kobject *kobj, struct kobj_attribute *= attr, + char *buf) +{ + return sysfs_emit(buf, "integer\n"); +} + /* Mini-LED mode *********************************************************= *****/ static ssize_t mini_led_mode_current_value_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) @@ -474,6 +518,207 @@ static ssize_t apu_mem_possible_values_show(struct ko= bject *kobj, struct kobj_at } ATTR_GROUP_ENUM_CUSTOM(apu_mem, "apu_mem", "Set available system RAM (in G= B) for the APU to use"); =20 +static int init_max_cpu_cores(void) +{ + u32 cores; + int err; + + asus_armoury.cpu_cores =3D kzalloc(sizeof(struct cpu_cores), GFP_KERNEL); + if (!asus_armoury.cpu_cores) + return -ENOMEM; + + err =3D asus_wmi_get_devstate_dsts(ASUS_WMI_DEVID_CORES_MAX, &cores); + if (err) + return err; + + if ((cores & ASUS_WMI_DSTS_PRESENCE_BIT) =3D=3D 0) { + pr_err("ACPI does not support CPU core count control\n"); + err =3D -ENODEV; + goto init_max_cpu_cores_err; + } + + asus_armoury.cpu_cores->max_power_cores =3D FIELD_GET(ASUS_POWER_CORE_MAS= K, cores); + asus_armoury.cpu_cores->max_perf_cores =3D FIELD_GET(ASUS_PERF_CORE_MASK,= cores); + + err =3D asus_wmi_get_devstate_dsts(ASUS_WMI_DEVID_CORES, &cores); + if (err) { + pr_err("Could not get CPU core count: error %d\n", err); + goto init_max_cpu_cores_err; + } + + asus_armoury.cpu_cores->cur_perf_cores =3D FIELD_GET(ASUS_PERF_CORE_MASK,= cores); + asus_armoury.cpu_cores->cur_power_cores =3D FIELD_GET(ASUS_POWER_CORE_MAS= K, cores); + + asus_armoury.cpu_cores->min_perf_cores =3D CPU_PERF_CORE_COUNT_MIN; + asus_armoury.cpu_cores->min_power_cores =3D CPU_POWR_CORE_COUNT_MIN; + + return 0; + +init_max_cpu_cores_err: + kfree(asus_armoury.cpu_cores); + return err; +} + +static ssize_t cores_value_show(struct kobject *kobj, struct kobj_attribut= e *attr, char *buf, + enum cpu_core_type core_type, enum cpu_core_value core_value) +{ + u32 cores; + + switch (core_value) { + case CPU_CORE_DEFAULT: + case CPU_CORE_MAX: + if (core_type =3D=3D CPU_CORE_PERF) + return sysfs_emit(buf, "%u\n", + asus_armoury.cpu_cores->max_perf_cores); + else + return sysfs_emit(buf, "%u\n", + asus_armoury.cpu_cores->max_power_cores); + case CPU_CORE_MIN: + if (core_type =3D=3D CPU_CORE_PERF) + return sysfs_emit(buf, "%u\n", + asus_armoury.cpu_cores->min_perf_cores); + else + return sysfs_emit(buf, "%u\n", + asus_armoury.cpu_cores->min_power_cores); + default: + break; + } + + if (core_type =3D=3D CPU_CORE_PERF) + cores =3D asus_armoury.cpu_cores->cur_perf_cores; + else + cores =3D asus_armoury.cpu_cores->cur_power_cores; + + return sysfs_emit(buf, "%u\n", cores); +} + +static ssize_t cores_current_value_store(struct kobject *kobj, struct kobj= _attribute *attr, + const char *buf, enum cpu_core_type core_type) +{ + u32 new_cores, perf_cores, power_cores, out_val, min, max; + int result, err; + + result =3D kstrtou32(buf, 10, &new_cores); + if (result) + return result; + + scoped_guard(mutex, &asus_armoury.cpu_core_mutex) { + if (core_type =3D=3D CPU_CORE_PERF) { + perf_cores =3D new_cores; + power_cores =3D asus_armoury.cpu_cores->cur_power_cores; + min =3D asus_armoury.cpu_cores->min_perf_cores; + max =3D asus_armoury.cpu_cores->max_perf_cores; + } else { + perf_cores =3D asus_armoury.cpu_cores->cur_perf_cores; + power_cores =3D new_cores; + min =3D asus_armoury.cpu_cores->min_power_cores; + max =3D asus_armoury.cpu_cores->max_power_cores; + } + + if (new_cores < min || new_cores > max) + return -EINVAL; + + out_val =3D FIELD_PREP(ASUS_PERF_CORE_MASK, perf_cores) | + FIELD_PREP(ASUS_POWER_CORE_MASK, power_cores); + + err =3D asus_wmi_set_devstate(ASUS_WMI_DEVID_CORES, out_val, &result); + if (err) { + pr_warn("Failed to set CPU core count: %d\n", err); + return err; + } + + if (result > 1) { + pr_warn("Failed to set CPU core count (result): 0x%x\n", result); + return -EIO; + } + } + + pr_info("CPU core count changed, reboot required\n"); + + sysfs_notify(kobj, NULL, attr->attr.name); + asus_set_reboot_and_signal_event(); + + return 0; +} + +static ssize_t cores_performance_min_value_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return cores_value_show(kobj, attr, buf, CPU_CORE_PERF, CPU_CORE_MIN); +} + +static ssize_t cores_performance_max_value_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return cores_value_show(kobj, attr, buf, CPU_CORE_PERF, CPU_CORE_MAX); +} + +static ssize_t cores_performance_default_value_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return cores_value_show(kobj, attr, buf, CPU_CORE_PERF, CPU_CORE_DEFAULT); +} + +static ssize_t cores_performance_current_value_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return cores_value_show(kobj, attr, buf, CPU_CORE_PERF, CPU_CORE_CURRENT); +} + +static ssize_t cores_performance_current_value_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) +{ + int err; + + err =3D cores_current_value_store(kobj, attr, buf, CPU_CORE_PERF); + if (err) + return err; + + return count; +} +ATTR_GROUP_CORES_RW(cores_performance, "cores_performance", + "Set the max available performance cores"); + +static ssize_t cores_efficiency_min_value_show(struct kobject *kobj, struc= t kobj_attribute *attr, + char *buf) +{ + return cores_value_show(kobj, attr, buf, CPU_CORE_POWER, CPU_CORE_MIN); +} + +static ssize_t cores_efficiency_max_value_show(struct kobject *kobj, struc= t kobj_attribute *attr, + char *buf) +{ + return cores_value_show(kobj, attr, buf, CPU_CORE_POWER, CPU_CORE_MAX); +} + +static ssize_t cores_efficiency_default_value_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return cores_value_show(kobj, attr, buf, CPU_CORE_POWER, CPU_CORE_DEFAULT= ); +} + +static ssize_t cores_efficiency_current_value_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return cores_value_show(kobj, attr, buf, CPU_CORE_POWER, CPU_CORE_CURRENT= ); +} + +static ssize_t cores_efficiency_current_value_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, + size_t count) +{ + int err; + + err =3D cores_current_value_store(kobj, attr, buf, CPU_CORE_POWER); + if (err) + return err; + + return count; +} +ATTR_GROUP_CORES_RW(cores_efficiency, "cores_efficiency", + "Set the max available efficiency cores"); + /* Simple attribute creation */ ATTR_GROUP_ENUM_INT_RO(charge_mode, "charge_mode", ASUS_WMI_DEVID_CHARGE_M= ODE, "0;1;2", "Show the current mode of charging"); @@ -495,6 +740,8 @@ static const struct asus_attr_group armoury_attr_groups= [] =3D { { &egpu_enable_attr_group, ASUS_WMI_DEVID_EGPU }, { &dgpu_disable_attr_group, ASUS_WMI_DEVID_DGPU }, { &apu_mem_attr_group, ASUS_WMI_DEVID_APU_MEM }, + { &cores_efficiency_attr_group, ASUS_WMI_DEVID_CORES_MAX }, + { &cores_performance_attr_group, ASUS_WMI_DEVID_CORES_MAX }, =20 { &charge_mode_attr_group, ASUS_WMI_DEVID_CHARGE_MODE }, { &boot_sound_attr_group, ASUS_WMI_DEVID_BOOT_SOUND }, @@ -598,6 +845,7 @@ static int asus_fw_attr_add(void) static int __init asus_fw_init(void) { char *wmi_uid; + int err; =20 wmi_uid =3D wmi_get_acpi_device_uid(ASUS_WMI_MGMT_GUID); if (!wmi_uid) @@ -610,6 +858,14 @@ static int __init asus_fw_init(void) if (!strcmp(wmi_uid, ASUS_ACPI_UID_ASUSWMI)) return -ENODEV; =20 + if (asus_wmi_is_present(ASUS_WMI_DEVID_CORES_MAX)) { + err =3D init_max_cpu_cores(); + if (err) { + pr_err("Could not initialise CPU core control %d\n", err); + return err; + } + } + return asus_fw_attr_add(); } =20 diff --git a/drivers/platform/x86/asus-armoury.h b/drivers/platform/x86/asu= s-armoury.h index 61675e7b5a60..a6c4caefdef9 100644 --- a/drivers/platform/x86/asus-armoury.h +++ b/drivers/platform/x86/asus-armoury.h @@ -161,4 +161,32 @@ .name =3D _fsname, .attrs =3D _attrname##_attrs \ } =20 +/* CPU core attributes need a little different in setup */ +#define ATTR_GROUP_CORES_RW(_attrname, _fsname, _dispname) \ + __ATTR_SHOW_FMT(scalar_increment, _attrname, "%d\n", 1); \ + __ATTR_SHOW_FMT(display_name, _attrname, "%s\n", _dispname); \ + static struct kobj_attribute attr_##_attrname##_current_value =3D \ + __ASUS_ATTR_RW(_attrname, current_value); \ + static struct kobj_attribute attr_##_attrname##_default_value =3D \ + __ASUS_ATTR_RO(_attrname, default_value); \ + static struct kobj_attribute attr_##_attrname##_min_value =3D \ + __ASUS_ATTR_RO(_attrname, min_value); \ + static struct kobj_attribute attr_##_attrname##_max_value =3D \ + __ASUS_ATTR_RO(_attrname, max_value); \ + static struct kobj_attribute attr_##_attrname##_type =3D \ + __ASUS_ATTR_RO_AS(type, int_type_show); \ + static struct attribute *_attrname##_attrs[] =3D { \ + &attr_##_attrname##_current_value.attr, \ + &attr_##_attrname##_default_value.attr, \ + &attr_##_attrname##_min_value.attr, \ + &attr_##_attrname##_max_value.attr, \ + &attr_##_attrname##_scalar_increment.attr, \ + &attr_##_attrname##_display_name.attr, \ + &attr_##_attrname##_type.attr, \ + NULL \ + }; \ + static const struct attribute_group _attrname##_attr_group =3D { \ + .name =3D _fsname, .attrs =3D _attrname##_attrs \ + } + #endif /* _ASUS_ARMOURY_H_ */ diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/pla= tform_data/x86/asus-wmi.h index a4f6bab93a6f..9a79dae97adf 100644 --- a/include/linux/platform_data/x86/asus-wmi.h +++ b/include/linux/platform_data/x86/asus-wmi.h @@ -137,6 +137,11 @@ /* dgpu on/off */ #define ASUS_WMI_DEVID_DGPU 0x00090020 =20 +/* Intel E-core and P-core configuration in a format 0x0[E]0[P] */ +#define ASUS_WMI_DEVID_CORES 0x001200D2 + /* Maximum Intel E-core and P-core availability */ +#define ASUS_WMI_DEVID_CORES_MAX 0x001200D3 + #define ASUS_WMI_DEVID_APU_MEM 0x000600C1 =20 /* gpu mux switch, 0 =3D dGPU, 1 =3D Optimus */ --=20 2.51.0