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Message-ID: <078a4a2d-c8ff-4039-b84f-b014055a4368@redhat.com>
Date: Tue, 16 Jul 2024 11:25:45 +0200
From: Hans de Goede <hdegoede@...hat.com>
To: "Luke D. Jones" <luke@...nes.dev>, platform-driver-x86@...r.kernel.org
Cc: corentin.chary@...il.com, ilpo.jarvinen@...ux.intel.com,
mario.limonciello@....com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/5] platform/x86: asus-bios: add core count control
Hi,
On 7/16/24 7:16 AM, Luke D. Jones wrote:
> Implement Intel core enablement under the asus-bioscfg 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.
Not a full revieew, just a quick remark. You say this this
requires a reboot, but this patch does not update asus_bios_requires_reboot()
Regards,
Hans
>
> Signed-off-by: Luke D. Jones <luke@...nes.dev>
> ---
> drivers/platform/x86/asus-bioscfg.c | 206 +++++++++++++++++++++
> drivers/platform/x86/asus-bioscfg.h | 29 +++
> include/linux/platform_data/x86/asus-wmi.h | 4 +
> 3 files changed, 239 insertions(+)
>
> diff --git a/drivers/platform/x86/asus-bioscfg.c b/drivers/platform/x86/asus-bioscfg.c
> index 57efe50e0d19..6d39e45591e8 100644
> --- a/drivers/platform/x86/asus-bioscfg.c
> +++ b/drivers/platform/x86/asus-bioscfg.c
> @@ -41,6 +41,18 @@ MODULE_ALIAS("wmi:"ASUS_NB_WMI_EVENT_GUID);
> #define ASUS_MINI_LED_2024_STRONG 0x01
> #define ASUS_MINI_LED_2024_OFF 0x02
>
> +enum cpu_core_type {
> + CPU_CORE_PERF = 0,
> + CPU_CORE_POWER,
> +};
> +
> +enum cpu_core_value {
> + CPU_CORE_DEFAULT = 0,
> + CPU_CORE_MIN,
> + CPU_CORE_MAX,
> + CPU_CORE_CURRENT,
> +};
> +
> /* Default limits for tunables available on ASUS ROG laptops */
> #define PPT_CPU_LIMIT_MIN 5
> #define PPT_CPU_LIMIT_MAX 150
> @@ -75,6 +87,10 @@ struct rog_tunables {
> u32 nv_temp_default;
> u32 nv_temp_max;
> u32 nv_temp_target;
> +
> + u32 min_perf_cores;
> + u32 max_perf_cores;
> + u32 max_power_cores;
> };
>
> static const struct class *fw_attr_class;
> @@ -540,6 +556,191 @@ static ssize_t apu_mem_possible_values_show(struct kobject *kobj,
> }
> ATTR_GROUP_ENUM_CUSTOM(apu_mem, "apu_mem", "Set the available system memory for the APU to use");
>
> +static int asus_bios_set_max_cores(void)
> +{
> + u32 cores;
> + int err;
> +
> + asus_bios.rog_tunables->min_perf_cores = 4;
> + asus_bios.rog_tunables->max_perf_cores = 4;
> + asus_bios.rog_tunables->max_power_cores = 8;
> +
> + err = asus_wmi_get_devstate_dsts(ASUS_WMI_DEVID_CORES_MAX, &cores);
> + if (err)
> + return err;
> +
> + cores &= ~ASUS_WMI_DSTS_PRESENCE_BIT;
> + asus_bios.rog_tunables->max_power_cores = (cores & 0xff00) >> 8;
> + asus_bios.rog_tunables->max_perf_cores = cores & 0xff;
> +
> + return 0;
> +}
> +
> +static ssize_t cores_value_show(struct kobject *kobj,
> + struct kobj_attribute *attr, char *buf,
> + enum cpu_core_type core_type,
> + enum cpu_core_value core_value)
> +{
> + u32 cores;
> + int err;
> +
> + switch (core_value) {
> + case CPU_CORE_DEFAULT:
> + case CPU_CORE_MAX:
> + if (core_type == CPU_CORE_PERF)
> + return sysfs_emit(buf, "%d\n", asus_bios.rog_tunables->max_perf_cores);
> + else
> + return sysfs_emit(buf, "%d\n", asus_bios.rog_tunables->max_power_cores);
> + case CPU_CORE_MIN:
> + if (core_type == CPU_CORE_PERF)
> + return sysfs_emit(buf, "%d\n", asus_bios.rog_tunables->min_perf_cores);
> + else
> + return sysfs_emit(buf, "%d\n", 0);
> + default:
> + break;
> + }
> +
> + err = asus_wmi_get_devstate_dsts(ASUS_WMI_DEVID_CORES, &cores);
> + if (err)
> + return err;
> +
> + cores &= ~ASUS_WMI_DSTS_PRESENCE_BIT;
> + if (core_type == CPU_CORE_PERF)
> + cores &= 0xff;
> + else
> + cores = (cores & 0xff00) >> 8;
> + return sysfs_emit(buf, "%d\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)
> +{
> + int result, err;
> + u32 cores, currentv, min, max;
> +
> + result = kstrtou32(buf, 10, &cores);
> + if (result)
> + return result;
> +
> + if (core_type == CPU_CORE_PERF) {
> + min = asus_bios.rog_tunables->min_perf_cores;
> + max = asus_bios.rog_tunables->max_perf_cores;
> + } else {
> + min = 0;
> + max = asus_bios.rog_tunables->max_power_cores;
> + }
> + if (cores < min || cores > max)
> + return -EINVAL;
> +
> + err = asus_wmi_get_devstate_dsts(ASUS_WMI_DEVID_CORES, ¤tv);
> + if (err)
> + return err;
> +
> + if (core_type == CPU_CORE_PERF)
> + cores |= (currentv & 0xff00);
> + else
> + cores |= currentv & 0xff;
> +
> + if (cores == currentv)
> + return 0;
> +
> + err = asus_wmi_set_devstate(ASUS_WMI_DEVID_CORES, cores, &result);
> + if (err) {
> + pr_warn("Failed to set perfromance core count: %d\n", err);
> + return err;
> + }
> +
> + if (result > 1) {
> + pr_warn("Failed to set performance 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 = cores_current_value_store(kobj, attr, buf, CPU_CORE_PERF);
> + if (err)
> + return err;
> +
> + return count;
> +}
> +ATTR_GROUP_CORES_RW(cores_performance, "cores_performance", ASUS_WMI_DEVID_CORES,
> + "Set the max available performance cores");
> +
> +static ssize_t cores_efficiency_min_value_show(struct kobject *kobj,
> + struct 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,
> + struct 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 = cores_current_value_store(kobj, attr, buf, CPU_CORE_POWER);
> + if (err)
> + return err;
> +
> + return count;
> +}
> +ATTR_GROUP_CORES_RW(cores_efficiency, "cores_efficiency", ASUS_WMI_DEVID_CORES,
> + "Set the max available efficiency cores");
> +
> /* Simple attribute creation */
> ATTR_GROUP_ENUM_INT_RW(thermal_policy, "thermal_policy", ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY,
> 0, 3, "0;1;2", "Set the thermal profile: 0=normal, 1=performance, 2=quiet");
> @@ -636,6 +837,11 @@ static int asus_fw_attr_add(void)
> if (asus_wmi_is_present(ASUS_WMI_DEVID_EGPU_CONNECTED))
> sysfs_create_group(&asus_bioscfg.fw_attr_kset->kobj, &egpu_connected_attr_group);
>
> + if (asus_wmi_is_present(ASUS_WMI_DEVID_CORES_MAX) && !asus_bios_set_max_cores()) {
> + sysfs_create_group(&asus_bios.fw_attr_kset->kobj, &cores_performance_attr_group);
> + sysfs_create_group(&asus_bios.fw_attr_kset->kobj, &cores_efficiency_attr_group);
> + }
> +
> if (asus_wmi_is_present(ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY))
> sysfs_create_group(&asus_bioscfg.fw_attr_kset->kobj, &thermal_policy_attr_group);
> if (asus_wmi_is_present(ASUS_WMI_DEVID_PPT_PL1_SPL))
> diff --git a/drivers/platform/x86/asus-bioscfg.h b/drivers/platform/x86/asus-bioscfg.h
> index 2da55a91ff0b..bae1976eda3f 100644
> --- a/drivers/platform/x86/asus-bioscfg.h
> +++ b/drivers/platform/x86/asus-bioscfg.h
> @@ -244,6 +244,35 @@ static const struct attribute_group _attrname##_attr_group = { \
> .attrs = _attrname##_attrs \
> }
>
> +/* 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 = \
> + __ASUS_ATTR_RW(_attrname, current_value); \
> +static struct kobj_attribute attr_##_attrname##_default_value = \
> + __ASUS_ATTR_RO(_attrname, default_value); \
> +static struct kobj_attribute attr_##_attrname##_min_value = \
> + __ASUS_ATTR_RO(_attrname, min_value); \
> +static struct kobj_attribute attr_##_attrname##_max_value = \
> + __ASUS_ATTR_RO(_attrname, max_value); \
> +static struct kobj_attribute attr_##_attrname##_type = \
> + __ASUS_ATTR_RO_AS(type, int_type_show); \
> +static struct attribute *_attrname##_attrs[] = { \
> + &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 = { \
> + .name = _fsname, \
> + .attrs = _attrname##_attrs \
> +}
> +
> /* ROG PPT attributes need a little different in setup */
> #define ATTR_GROUP_PPT_RW(_attrname, _fsname, _wmi, _default, \
> _min, _max, _incstep, _dispname) \
> diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
> index e3d511918416..d8f713ed3ea3 100644
> --- a/include/linux/platform_data/x86/asus-wmi.h
> +++ b/include/linux/platform_data/x86/asus-wmi.h
> @@ -128,6 +128,10 @@
> /* dgpu on/off */
> #define ASUS_WMI_DEVID_DGPU 0x00090020
>
> +/* 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_DGPU_BASE_TGP 0x00120099
> #define ASUS_WMI_DEVID_DGPU_SET_TGP 0x00120098
> #define ASUS_WMI_DEVID_APU_MEM 0x000600C1
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