From: Wyes Karny <wyes.karny@amd.com>
To: Perry Yuan <perry.yuan@amd.com>,
rafael.j.wysocki@intel.com, Mario.Limonciello@amd.com,
ray.huang@amd.com, viresh.kumar@linaro.org
Cc: Deepak.Sharma@amd.com, Nathan.Fontenot@amd.com,
Alexander.Deucher@amd.com, Shimmer.Huang@amd.com,
Xiaojian.Du@amd.com, Li.Meng@amd.com, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v11 04/11] cpufreq: amd-pstate: implement Pstate EPP support for the AMD processors
Date: Thu, 19 Jan 2023 10:47:11 +0530 [thread overview]
Message-ID: <8ee9f7d0-2204-92de-dae5-0348e926c461@amd.com> (raw)
In-Reply-To: <20230118075210.447418-5-perry.yuan@amd.com>
On 1/18/2023 1:22 PM, Perry Yuan wrote:
> From: Perry Yuan <Perry.Yuan@amd.com>
>
> Add EPP driver support for AMD SoCs which support a dedicated MSR for
> CPPC. EPP is used by the DPM controller to configure the frequency that
> a core operates at during short periods of activity.
>
> The SoC EPP targets are configured on a scale from 0 to 255 where 0
> represents maximum performance and 255 represents maximum efficiency.
>
> The amd-pstate driver exports profile string names to userspace that are
> tied to specific EPP values.
>
> The balance_performance string (0x80) provides the best balance for
> efficiency versus power on most systems, but users can choose other
> strings to meet their needs as well.
>
> $ cat /sys/devices/system/cpu/cpufreq/policy0/energy_performance_available_preferences
> default performance balance_performance balance_power power
>
> $ cat /sys/devices/system/cpu/cpufreq/policy0/energy_performance_preference
> balance_performance
>
> To enable the driver,it needs to add `amd_pstate=active` to kernel
> command line and kernel will load the active mode epp driver
>
> Acked-by: Huang Rui <ray.huang@amd.com>
> Reviewed-by: Mario Limonciello <Mario.Limonciello@amd.com>
> Tested-by: Wyes Karny <wyes.karny@amd.com>
> Signed-off-by: Perry Yuan <Perry.Yuan@amd.com>
Reviewed-by: Wyes Karny <wyes.karny@amd.com>
> ---
> drivers/cpufreq/amd-pstate.c | 379 ++++++++++++++++++++++++++++++++++-
> include/linux/amd-pstate.h | 55 +++++
> 2 files changed, 428 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
> index 1a8b31277620..2109ad3fdd42 100644
> --- a/drivers/cpufreq/amd-pstate.c
> +++ b/drivers/cpufreq/amd-pstate.c
> @@ -59,7 +59,9 @@
> * we disable it by default to go acpi-cpufreq on these processors and add a
> * module parameter to be able to enable it manually for debugging.
> */
> +static struct cpufreq_driver *current_pstate_driver;
> static struct cpufreq_driver amd_pstate_driver;
> +static struct cpufreq_driver amd_pstate_epp_driver;
> static int cppc_state = AMD_PSTATE_DISABLE;
>
> static inline int get_mode_idx_from_str(const char *str, size_t size)
> @@ -73,6 +75,114 @@ static inline int get_mode_idx_from_str(const char *str, size_t size)
> return -EINVAL;
> }
>
> +static DEFINE_MUTEX(amd_pstate_limits_lock);
> +static DEFINE_MUTEX(amd_pstate_driver_lock);
> +
> +static s16 amd_pstate_get_epp(struct amd_cpudata *cpudata, u64 cppc_req_cached)
> +{
> + u64 epp;
> + int ret;
> +
> + if (boot_cpu_has(X86_FEATURE_CPPC)) {
> + if (!cppc_req_cached) {
> + epp = rdmsrl_on_cpu(cpudata->cpu, MSR_AMD_CPPC_REQ,
> + &cppc_req_cached);
> + if (epp)
> + return epp;
> + }
> + epp = (cppc_req_cached >> 24) & 0xFF;
> + } else {
> + ret = cppc_get_epp_perf(cpudata->cpu, &epp);
> + if (ret < 0) {
> + pr_debug("Could not retrieve energy perf value (%d)\n", ret);
> + return -EIO;
> + }
> + }
> +
> + return (s16)(epp & 0xff);
> +}
> +
> +static int amd_pstate_get_energy_pref_index(struct amd_cpudata *cpudata)
> +{
> + s16 epp;
> + int index = -EINVAL;
> +
> + epp = amd_pstate_get_epp(cpudata, 0);
> + if (epp < 0)
> + return epp;
> +
> + switch (epp) {
> + case AMD_CPPC_EPP_PERFORMANCE:
> + index = EPP_INDEX_PERFORMANCE;
> + break;
> + case AMD_CPPC_EPP_BALANCE_PERFORMANCE:
> + index = EPP_INDEX_BALANCE_PERFORMANCE;
> + break;
> + case AMD_CPPC_EPP_BALANCE_POWERSAVE:
> + index = EPP_INDEX_BALANCE_POWERSAVE;
> + break;
> + case AMD_CPPC_EPP_POWERSAVE:
> + index = EPP_INDEX_POWERSAVE;
> + break;
> + default:
> + break;
> + }
> +
> + return index;
> +}
> +
> +static int amd_pstate_set_epp(struct amd_cpudata *cpudata, u32 epp)
> +{
> + int ret;
> + struct cppc_perf_ctrls perf_ctrls;
> +
> + if (boot_cpu_has(X86_FEATURE_CPPC)) {
> + u64 value = READ_ONCE(cpudata->cppc_req_cached);
> +
> + value &= ~GENMASK_ULL(31, 24);
> + value |= (u64)epp << 24;
> + WRITE_ONCE(cpudata->cppc_req_cached, value);
> +
> + ret = wrmsrl_on_cpu(cpudata->cpu, MSR_AMD_CPPC_REQ, value);
> + if (!ret)
> + cpudata->epp_cached = epp;
> + } else {
> + perf_ctrls.energy_perf = epp;
> + ret = cppc_set_epp_perf(cpudata->cpu, &perf_ctrls, 1);
> + if (ret) {
> + pr_debug("failed to set energy perf value (%d)\n", ret);
> + return ret;
> + }
> + cpudata->epp_cached = epp;
> + }
> +
> + return ret;
> +}
> +
> +static int amd_pstate_set_energy_pref_index(struct amd_cpudata *cpudata,
> + int pref_index)
> +{
> + int epp = -EINVAL;
> + int ret;
> +
> + if (!pref_index) {
> + pr_debug("EPP pref_index is invalid\n");
> + return -EINVAL;
> + }
> +
> + if (epp == -EINVAL)
> + epp = epp_values[pref_index];
> +
> + if (epp > 0 && cpudata->policy == CPUFREQ_POLICY_PERFORMANCE) {
> + pr_debug("EPP cannot be set under performance policy\n");
> + return -EBUSY;
> + }
> +
> + ret = amd_pstate_set_epp(cpudata, epp);
> +
> + return ret;
> +}
> +
> static inline int pstate_enable(bool enable)
> {
> return wrmsrl_safe(MSR_AMD_CPPC_ENABLE, enable);
> @@ -81,11 +191,21 @@ static inline int pstate_enable(bool enable)
> static int cppc_enable(bool enable)
> {
> int cpu, ret = 0;
> + struct cppc_perf_ctrls perf_ctrls;
>
> for_each_present_cpu(cpu) {
> ret = cppc_set_enable(cpu, enable);
> if (ret)
> return ret;
> +
> + /* Enable autonomous mode for EPP */
> + if (cppc_state == AMD_PSTATE_ACTIVE) {
> + /* Set desired perf as zero to allow EPP firmware control */
> + perf_ctrls.desired_perf = 0;
> + ret = cppc_set_perf(cpu, &perf_ctrls);
> + if (ret)
> + return ret;
> + }
> }
>
> return ret;
> @@ -428,7 +548,7 @@ static void amd_pstate_boost_init(struct amd_cpudata *cpudata)
> return;
>
> cpudata->boost_supported = true;
> - amd_pstate_driver.boost_enabled = true;
> + current_pstate_driver->boost_enabled = true;
> }
>
> static void amd_perf_ctl_reset(unsigned int cpu)
> @@ -602,10 +722,61 @@ static ssize_t show_amd_pstate_highest_perf(struct cpufreq_policy *policy,
> return sprintf(&buf[0], "%u\n", perf);
> }
>
> +static ssize_t show_energy_performance_available_preferences(
> + struct cpufreq_policy *policy, char *buf)
> +{
> + int i = 0;
> + int offset = 0;
> +
> + while (energy_perf_strings[i] != NULL)
> + offset += sysfs_emit_at(buf, offset, "%s ", energy_perf_strings[i++]);
> +
> + sysfs_emit_at(buf, offset, "\n");
> +
> + return offset;
> +}
> +
> +static ssize_t store_energy_performance_preference(
> + struct cpufreq_policy *policy, const char *buf, size_t count)
> +{
> + struct amd_cpudata *cpudata = policy->driver_data;
> + char str_preference[21];
> + ssize_t ret;
> +
> + ret = sscanf(buf, "%20s", str_preference);
> + if (ret != 1)
> + return -EINVAL;
> +
> + ret = match_string(energy_perf_strings, -1, str_preference);
> + if (ret < 0)
> + return -EINVAL;
> +
> + mutex_lock(&amd_pstate_limits_lock);
> + ret = amd_pstate_set_energy_pref_index(cpudata, ret);
> + mutex_unlock(&amd_pstate_limits_lock);
> +
> + return ret ?: count;
> +}
> +
> +static ssize_t show_energy_performance_preference(
> + struct cpufreq_policy *policy, char *buf)
> +{
> + struct amd_cpudata *cpudata = policy->driver_data;
> + int preference;
> +
> + preference = amd_pstate_get_energy_pref_index(cpudata);
> + if (preference < 0)
> + return preference;
> +
> + return sysfs_emit(buf, "%s\n", energy_perf_strings[preference]);
> +}
> +
> cpufreq_freq_attr_ro(amd_pstate_max_freq);
> cpufreq_freq_attr_ro(amd_pstate_lowest_nonlinear_freq);
>
> cpufreq_freq_attr_ro(amd_pstate_highest_perf);
> +cpufreq_freq_attr_rw(energy_performance_preference);
> +cpufreq_freq_attr_ro(energy_performance_available_preferences);
>
> static struct freq_attr *amd_pstate_attr[] = {
> &amd_pstate_max_freq,
> @@ -614,6 +785,186 @@ static struct freq_attr *amd_pstate_attr[] = {
> NULL,
> };
>
> +static struct freq_attr *amd_pstate_epp_attr[] = {
> + &amd_pstate_max_freq,
> + &amd_pstate_lowest_nonlinear_freq,
> + &amd_pstate_highest_perf,
> + &energy_performance_preference,
> + &energy_performance_available_preferences,
> + NULL,
> +};
> +
> +static int amd_pstate_epp_cpu_init(struct cpufreq_policy *policy)
> +{
> + int min_freq, max_freq, nominal_freq, lowest_nonlinear_freq, ret;
> + struct amd_cpudata *cpudata;
> + struct device *dev;
> + int rc;
> + u64 value;
> +
> + /*
> + * Resetting PERF_CTL_MSR will put the CPU in P0 frequency,
> + * which is ideal for initialization process.
> + */
> + amd_perf_ctl_reset(policy->cpu);
> + dev = get_cpu_device(policy->cpu);
> + if (!dev)
> + goto free_cpudata1;
> +
> + cpudata = kzalloc(sizeof(*cpudata), GFP_KERNEL);
> + if (!cpudata)
> + return -ENOMEM;
> +
> + cpudata->cpu = policy->cpu;
> + cpudata->epp_policy = 0;
> +
> + rc = amd_pstate_init_perf(cpudata);
> + if (rc)
> + goto free_cpudata1;
> +
> + min_freq = amd_get_min_freq(cpudata);
> + max_freq = amd_get_max_freq(cpudata);
> + nominal_freq = amd_get_nominal_freq(cpudata);
> + lowest_nonlinear_freq = amd_get_lowest_nonlinear_freq(cpudata);
> + if (min_freq < 0 || max_freq < 0 || min_freq > max_freq) {
> + dev_err(dev, "min_freq(%d) or max_freq(%d) value is incorrect\n",
> + min_freq, max_freq);
> + ret = -EINVAL;
> + goto free_cpudata1;
> + }
> +
> + policy->cpuinfo.min_freq = min_freq;
> + policy->cpuinfo.max_freq = max_freq;
> + /* It will be updated by governor */
> + policy->cur = policy->cpuinfo.min_freq;
> +
> + /* Initial processor data capability frequencies */
> + cpudata->max_freq = max_freq;
> + cpudata->min_freq = min_freq;
> + cpudata->nominal_freq = nominal_freq;
> + cpudata->lowest_nonlinear_freq = lowest_nonlinear_freq;
> +
> + policy->driver_data = cpudata;
> +
> + cpudata->epp_cached = amd_pstate_get_epp(cpudata, 0);
> +
> + policy->min = policy->cpuinfo.min_freq;
> + policy->max = policy->cpuinfo.max_freq;
> +
> + /*
> + * Set the policy to powersave to provide a valid fallback value in case
> + * the default cpufreq governor is neither powersave nor performance.
> + */
> + policy->policy = CPUFREQ_POLICY_POWERSAVE;
> +
> + if (boot_cpu_has(X86_FEATURE_CPPC)) {
> + policy->fast_switch_possible = true;
> + ret = rdmsrl_on_cpu(cpudata->cpu, MSR_AMD_CPPC_REQ, &value);
> + if (ret)
> + return ret;
> + WRITE_ONCE(cpudata->cppc_req_cached, value);
> +
> + ret = rdmsrl_on_cpu(cpudata->cpu, MSR_AMD_CPPC_CAP1, &value);
> + if (ret)
> + return ret;
> + WRITE_ONCE(cpudata->cppc_cap1_cached, value);
> + }
> + amd_pstate_boost_init(cpudata);
> +
> + return 0;
> +
> +free_cpudata1:
> + kfree(cpudata);
> + return ret;
> +}
> +
> +static int amd_pstate_epp_cpu_exit(struct cpufreq_policy *policy)
> +{
> + pr_debug("CPU %d exiting\n", policy->cpu);
> + policy->fast_switch_possible = false;
> + return 0;
> +}
> +
> +static void amd_pstate_epp_init(unsigned int cpu)
> +{
> + struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
> + struct amd_cpudata *cpudata = policy->driver_data;
> + u32 max_perf, min_perf;
> + u64 value;
> + s16 epp;
> +
> + max_perf = READ_ONCE(cpudata->highest_perf);
> + min_perf = READ_ONCE(cpudata->lowest_perf);
> +
> + value = READ_ONCE(cpudata->cppc_req_cached);
> +
> + if (cpudata->policy == CPUFREQ_POLICY_PERFORMANCE)
> + min_perf = max_perf;
> +
> + /* Initial min/max values for CPPC Performance Controls Register */
> + value &= ~AMD_CPPC_MIN_PERF(~0L);
> + value |= AMD_CPPC_MIN_PERF(min_perf);
> +
> + value &= ~AMD_CPPC_MAX_PERF(~0L);
> + value |= AMD_CPPC_MAX_PERF(max_perf);
> +
> + /* CPPC EPP feature require to set zero to the desire perf bit */
> + value &= ~AMD_CPPC_DES_PERF(~0L);
> + value |= AMD_CPPC_DES_PERF(0);
> +
> + if (cpudata->epp_policy == cpudata->policy)
> + goto skip_epp;
> +
> + cpudata->epp_policy = cpudata->policy;
> +
> + if (cpudata->policy == CPUFREQ_POLICY_PERFORMANCE) {
> + epp = amd_pstate_get_epp(cpudata, value);
> + if (epp < 0)
> + goto skip_epp;
> + /* force the epp value to be zero for performance policy */
> + epp = 0;
> + } else {
> + /* Get BIOS pre-defined epp value */
> + epp = amd_pstate_get_epp(cpudata, value);
> + if (epp)
> + goto skip_epp;
> + }
> + /* Set initial EPP value */
> + if (boot_cpu_has(X86_FEATURE_CPPC)) {
> + value &= ~GENMASK_ULL(31, 24);
> + value |= (u64)epp << 24;
> + }
> +
> +skip_epp:
> + WRITE_ONCE(cpudata->cppc_req_cached, value);
> + amd_pstate_set_epp(cpudata, epp);
> + cpufreq_cpu_put(policy);
> +}
> +
> +static int amd_pstate_epp_set_policy(struct cpufreq_policy *policy)
> +{
> + struct amd_cpudata *cpudata = policy->driver_data;
> +
> + if (!policy->cpuinfo.max_freq)
> + return -ENODEV;
> +
> + pr_debug("set_policy: cpuinfo.max %u policy->max %u\n",
> + policy->cpuinfo.max_freq, policy->max);
> +
> + cpudata->policy = policy->policy;
> +
> + amd_pstate_epp_init(policy->cpu);
> +
> + return 0;
> +}
> +
> +static int amd_pstate_epp_verify_policy(struct cpufreq_policy_data *policy)
> +{
> + cpufreq_verify_within_cpu_limits(policy);
> + pr_debug("policy_max =%d, policy_min=%d\n", policy->max, policy->min);
> + return 0;
> +}
> +
> static struct cpufreq_driver amd_pstate_driver = {
> .flags = CPUFREQ_CONST_LOOPS | CPUFREQ_NEED_UPDATE_LIMITS,
> .verify = amd_pstate_verify,
> @@ -627,6 +978,16 @@ static struct cpufreq_driver amd_pstate_driver = {
> .attr = amd_pstate_attr,
> };
>
> +static struct cpufreq_driver amd_pstate_epp_driver = {
> + .flags = CPUFREQ_CONST_LOOPS,
> + .verify = amd_pstate_epp_verify_policy,
> + .setpolicy = amd_pstate_epp_set_policy,
> + .init = amd_pstate_epp_cpu_init,
> + .exit = amd_pstate_epp_cpu_exit,
> + .name = "amd_pstate_epp",
> + .attr = amd_pstate_epp_attr,
> +};
> +
> static int __init amd_pstate_init(void)
> {
> int ret;
> @@ -655,7 +1016,8 @@ static int __init amd_pstate_init(void)
> /* capability check */
> if (boot_cpu_has(X86_FEATURE_CPPC)) {
> pr_debug("AMD CPPC MSR based functionality is supported\n");
> - amd_pstate_driver.adjust_perf = amd_pstate_adjust_perf;
> + if (cppc_state == AMD_PSTATE_PASSIVE)
> + current_pstate_driver->adjust_perf = amd_pstate_adjust_perf;
> } else {
> pr_debug("AMD CPPC shared memory based functionality is supported\n");
> static_call_update(amd_pstate_enable, cppc_enable);
> @@ -666,14 +1028,13 @@ static int __init amd_pstate_init(void)
> /* enable amd pstate feature */
> ret = amd_pstate_enable(true);
> if (ret) {
> - pr_err("failed to enable amd-pstate with return %d\n", ret);
> + pr_err("failed to enable with return %d\n", ret);
> return ret;
> }
>
> - ret = cpufreq_register_driver(&amd_pstate_driver);
> + ret = cpufreq_register_driver(current_pstate_driver);
> if (ret)
> - pr_err("failed to register amd_pstate_driver with return %d\n",
> - ret);
> + pr_err("failed to register with return %d\n", ret);
>
> return ret;
> }
> @@ -695,6 +1056,12 @@ static int __init amd_pstate_param(char *str)
> if (cppc_state == AMD_PSTATE_DISABLE)
> pr_info("driver is explicitly disabled\n");
>
> + if (cppc_state == AMD_PSTATE_ACTIVE)
> + current_pstate_driver = &amd_pstate_epp_driver;
> +
> + if (cppc_state == AMD_PSTATE_PASSIVE)
> + current_pstate_driver = &amd_pstate_driver;
> +
> return 0;
> }
>
> diff --git a/include/linux/amd-pstate.h b/include/linux/amd-pstate.h
> index dae2ce0f6735..9bfdabd9d930 100644
> --- a/include/linux/amd-pstate.h
> +++ b/include/linux/amd-pstate.h
> @@ -47,6 +47,10 @@ struct amd_aperf_mperf {
> * @prev: Last Aperf/Mperf/tsc count value read from register
> * @freq: current cpu frequency value
> * @boost_supported: check whether the Processor or SBIOS supports boost mode
> + * @epp_policy: Last saved policy used to set energy-performance preference
> + * @epp_cached: Cached CPPC energy-performance preference value
> + * @policy: Cpufreq policy value
> + * @cppc_cap1_cached Cached MSR_AMD_CPPC_CAP1 register value
> *
> * The amd_cpudata is key private data for each CPU thread in AMD P-State, and
> * represents all the attributes and goals that AMD P-State requests at runtime.
> @@ -72,6 +76,12 @@ struct amd_cpudata {
>
> u64 freq;
> bool boost_supported;
> +
> + /* EPP feature related attributes*/
> + s16 epp_policy;
> + s16 epp_cached;
> + u32 policy;
> + u64 cppc_cap1_cached;
> };
>
> /*
> @@ -91,4 +101,49 @@ static const char * const amd_pstate_mode_string[] = {
> NULL,
> };
>
> +#define AMD_CPPC_EPP_PERFORMANCE 0x00
> +#define AMD_CPPC_EPP_BALANCE_PERFORMANCE 0x80
> +#define AMD_CPPC_EPP_BALANCE_POWERSAVE 0xBF
> +#define AMD_CPPC_EPP_POWERSAVE 0xFF
> +
> +/*
> + * AMD Energy Preference Performance (EPP)
> + * The EPP is used in the CCLK DPM controller to drive
> + * the frequency that a core is going to operate during
> + * short periods of activity. EPP values will be utilized for
> + * different OS profiles (balanced, performance, power savings)
> + * display strings corresponding to EPP index in the
> + * energy_perf_strings[]
> + * index String
> + *-------------------------------------
> + * 0 default
> + * 1 performance
> + * 2 balance_performance
> + * 3 balance_power
> + * 4 power
> + */
> +enum energy_perf_value_index {
> + EPP_INDEX_DEFAULT = 0,
> + EPP_INDEX_PERFORMANCE,
> + EPP_INDEX_BALANCE_PERFORMANCE,
> + EPP_INDEX_BALANCE_POWERSAVE,
> + EPP_INDEX_POWERSAVE,
> +};
> +
> +static const char * const energy_perf_strings[] = {
> + [EPP_INDEX_DEFAULT] = "default",
> + [EPP_INDEX_PERFORMANCE] = "performance",
> + [EPP_INDEX_BALANCE_PERFORMANCE] = "balance_performance",
> + [EPP_INDEX_BALANCE_POWERSAVE] = "balance_power",
> + [EPP_INDEX_POWERSAVE] = "power",
> + NULL
> +};
> +
> +static unsigned int epp_values[] = {
> + [EPP_INDEX_DEFAULT] = 0,
> + [EPP_INDEX_PERFORMANCE] = AMD_CPPC_EPP_PERFORMANCE,
> + [EPP_INDEX_BALANCE_PERFORMANCE] = AMD_CPPC_EPP_BALANCE_PERFORMANCE,
> + [EPP_INDEX_BALANCE_POWERSAVE] = AMD_CPPC_EPP_BALANCE_POWERSAVE,
> + [EPP_INDEX_POWERSAVE] = AMD_CPPC_EPP_POWERSAVE,
> + };
> #endif /* _LINUX_AMD_PSTATE_H */
--
Thanks & Regards,
Wyes
next prev parent reply other threads:[~2023-01-19 5:17 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-18 7:51 [PATCH v11 00/11] Implement AMD Pstate EPP Driver Perry Yuan
2023-01-18 7:52 ` [PATCH v11 01/11] ACPI: CPPC: Add AMD pstate energy performance preference cppc control Perry Yuan
2023-01-18 7:52 ` [PATCH v11 02/11] Documentation: amd-pstate: add EPP profiles introduction Perry Yuan
2023-01-19 5:17 ` Wyes Karny
2023-01-18 7:52 ` [PATCH v11 03/11] cpufreq: amd-pstate: optimize driver working mode selection in amd_pstate_param() Perry Yuan
2023-01-18 7:52 ` [PATCH v11 04/11] cpufreq: amd-pstate: implement Pstate EPP support for the AMD processors Perry Yuan
2023-01-18 15:47 ` kernel test robot
2023-01-19 2:45 ` Huang Rui
2023-01-19 5:17 ` Wyes Karny [this message]
2023-01-18 7:52 ` [PATCH v11 05/11] cpufreq: amd-pstate: implement amd pstate cpu online and offline callback Perry Yuan
2023-01-19 5:27 ` Wyes Karny
2023-01-18 7:52 ` [PATCH v11 06/11] cpufreq: amd-pstate: implement suspend and resume callbacks Perry Yuan
2023-01-19 5:31 ` Wyes Karny
2023-01-18 7:52 ` [PATCH v11 07/11] cpufreq: amd-pstate: add driver working mode switch support Perry Yuan
2023-01-18 7:52 ` [PATCH v11 08/11] Documentation: amd-pstate: add amd pstate driver mode introduction Perry Yuan
2023-01-19 5:32 ` Wyes Karny
2023-01-18 7:52 ` [PATCH v11 09/11] Documentation: introduce amd pstate active mode kernel command line options Perry Yuan
2023-01-19 5:32 ` Wyes Karny
2023-01-18 7:52 ` [PATCH v11 10/11] cpufreq: amd-pstate: convert sprintf with sysfs_emit() Perry Yuan
2023-01-19 5:33 ` Wyes Karny
2023-01-18 7:52 ` [PATCH v11 11/11] Documentation: amd-pstate: introduce new global sysfs attributes Perry Yuan
2023-01-19 5:33 ` Wyes Karny
2023-01-19 2:50 ` [PATCH v11 00/11] Implement AMD Pstate EPP Driver Huang Rui
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