diff mbox series

[v3,15/21] cpupower: initial AMD P-state capability

Message ID 20211029130241.1984459-16-ray.huang@amd.com (mailing list archive)
State Superseded, archived
Headers show
Series cpufreq: introduce a new AMD CPU frequency control mechanism | expand

Commit Message

Huang Rui Oct. 29, 2021, 1:02 p.m. UTC 
If kernel starts the amd-pstate module, the cpupower will initial the
capability flag as CPUPOWER_CAP_AMD_PSTATE. And once amd-pstate
capability is set, it won't need to set legacy ACPI relative
capabilities anymore.

Signed-off-by: Huang Rui <ray.huang@amd.com>
---
 tools/power/cpupower/utils/helpers/cpuid.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)
diff mbox series

Patch

diff --git a/tools/power/cpupower/utils/helpers/cpuid.c b/tools/power/cpupower/utils/helpers/cpuid.c
index 72eb43593180..2a6dc104e76b 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()) {
+			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) {