[PATCH 14/19] cpupower: initial AMD P-state capability
From: Huang Rui <ray.huang@amd.com>
Date: 2021-09-08 15:02:07
Also in:
lkml
Subsystem:
cpu power monitoring subsystem, the rest · Maintainers:
Thomas Renninger, Shuah Khan, John B. Wyatt IV, John Kacur, Linus Torvalds
If kernel enables AMD P-state, cpupower won't need to respond ACPI hardware P-states function anymore. Signed-off-by: Huang Rui <ray.huang@amd.com> --- tools/power/cpupower/utils/helpers/cpuid.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/tools/power/cpupower/utils/helpers/cpuid.c b/tools/power/cpupower/utils/helpers/cpuid.c
index 72eb43593180..78218c54acca 100644
--- a/tools/power/cpupower/utils/helpers/cpuid.c
+++ b/tools/power/cpupower/utils/helpers/cpuid.c@@ -149,6 +149,19 @@ int get_cpu_info(struct cpupower_cpu_info *cpu_info) if (ext_cpuid_level >= 0x80000008 && cpuid_ebx(0x80000008) & (1 << 4)) cpu_info->caps |= CPUPOWER_CAP_AMD_RDPRU; + + if (cpupower_amd_pstate_enabled(0)) { + cpu_info->caps |= CPUPOWER_CAP_AMD_PSTATE; + + /* + * If AMD P-state is enabled, the firmware will treat + * AMD P-state function as high priority. + */ + cpu_info->caps &= ~CPUPOWER_CAP_AMD_CPB; + cpu_info->caps &= ~CPUPOWER_CAP_AMD_CPB_MSR; + cpu_info->caps &= ~CPUPOWER_CAP_AMD_HW_PSTATE; + cpu_info->caps &= ~CPUPOWER_CAP_AMD_PSTATEDEF; + } } if (cpu_info->vendor == X86_VENDOR_INTEL) {
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2.25.1