linux-dev/tools/power/cpupower/utils, branch master

cpupower: Add "perf" option to print AMD P-State information

2022-02-24T00:46:21Z

Add "-c --perf" option in cpupower-frequency-info to get the performance and frequency values for AMD P-State. Commit message amended: Shuah Khan Reviewed-by: Shuah Khan Signed-off-by: Huang Rui Signed-off-by: Shuah Khan

cpupower: Add function to print AMD P-State performance capabilities

2022-02-23T01:37:12Z

AMD P-State kernel module is using the fine grain frequency instead of acpi hardware pstate. So add a function to print performance and frequency values. Reviewed-by: Shuah Khan Signed-off-by: Huang Rui Signed-off-by: Shuah Khan

cpupower: Move print_speed function into misc helper

2022-02-23T01:37:07Z

The print_speed can be as a common function, and expose it into misc helper header. Then it can be used on other helper files as well. Reviewed-by: Shuah Khan Signed-off-by: Huang Rui Signed-off-by: Shuah Khan

cpupower: Enable boost state support for AMD P-State module

2022-02-23T01:37:01Z

The legacy ACPI hardware P-States function has 3 P-States on ACPI table, the CPU frequency only can be switched between the 3 P-States. While the processor supports the boost state, it will have another boost state that the frequency can be higher than P0 state, and the state can be decoded by the function of decode_pstates() and read by amd_pci_get_num_boost_states(). However, the new AMD P-State function is different than legacy ACPI hardware P-State on AMD processors. That has a finer grain frequency range between the highest and lowest frequency. And boost frequency is actually the frequency which is mapped on highest performance ratio. The similar previous P0 frequency is mapped on nominal performance ratio. If the highest performance on the processor is higher than nominal performance, then we think the current processor supports the boost state. And it uses amd_pstate_boost_init() to initialize boost for AMD P-State function. Reviewed-by: Shuah Khan Signed-off-by: Huang Rui Signed-off-by: Shuah Khan

cpupower: Add AMD P-State sysfs definition and access helper

2022-02-23T01:36:55Z

Introduce the marco definitions and access helper function for AMD P-State sysfs interfaces such as each performance goals and frequency levels in amd helper file. They will be used to read the sysfs attribute from AMD P-State cpufreq driver for cpupower utilities. Reviewed-by: Shuah Khan Signed-off-by: Huang Rui Signed-off-by: Shuah Khan

cpupower: Initial AMD P-State capability

2022-02-23T01:36:39Z

If kernel starts the AMD P-State module, the cpupower will initial the capability flag as CPUPOWER_CAP_AMD_PSTATE. And once AMD P-State capability is set, it won't need to set legacy ACPI relative capabilities anymore. Reviewed-by: Shuah Khan Signed-off-by: Huang Rui Signed-off-by: Shuah Khan

cpupower: Add the function to check AMD P-State enabled

2022-02-23T01:36:32Z

The processor with AMD P-State function also supports legacy ACPI hardware P-States feature as well. Once driver sets AMD P-State eanbled, the processor will respond the finer grain AMD P-State feature instead of legacy ACPI P-States. So it introduces the cpupower_amd_pstate_enabled() to check whether the current kernel enables AMD P-State or AMD CPUFreq module. Reviewed-by: Shuah Khan Signed-off-by: Huang Rui Signed-off-by: Shuah Khan

cpupower: Add AMD P-State capability flag

2022-02-23T01:36:16Z

Add AMD P-State capability flag in cpupower to indicate AMD new P-State kernel module support on Ryzen processors. Reviewed-by: Shuah Khan Signed-off-by: Huang Rui Signed-off-by: Shuah Khan

cpupower: Add cpuid cap flag for MSR_AMD_HWCR support

2021-01-26T16:40:45Z

Remove the family check for accessing the MSR_AMD_HWCR MSR and replace it with a cpupower cap flag. This update also allows for the removal of the local cpupower_cpu_info variable in cpufreq_has_boost_support() since we no longer need it to check the family. Signed-off-by: Nathan Fontenot Reviewed-by: Robert Richter Signed-off-by: Shuah Khan

cpupower: Remove family arg to decode_pstates()

2021-01-26T16:40:39Z

The decode_pstates() routine no longer uses the CPU family and the caleed routines (get_cof() and get_did()) can grab the family from the global cpupower_cpu_info struct. These update removes passing the family arg to all these routines. Signed-off-by: Nathan Fontenot Reviewed-by: Robert Richter Signed-off-by: Shuah Khan