[PATCH v4 15/22] cpupower: initial AMD P-state capability

From: Huang Rui <ray.huang@amd.com>
To: "Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
	Viresh Kumar <viresh.kumar@linaro.org>,
	Shuah Khan <skhan@linuxfoundation.org>,
	"Borislav Petkov" <bp@suse.de>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@kernel.org>,
	Giovanni Gherdovich <ggherdovich@suse.cz>,
	<linux-pm@vger.kernel.org>
Cc: Deepak Sharma <deepak.sharma@amd.com>,
	Alex Deucher <alexander.deucher@amd.com>,
	Mario Limonciello <mario.limonciello@amd.com>,
	Steven Noonan <steven@valvesoftware.com>,
	Nathan Fontenot <nathan.fontenot@amd.com>,
	Jinzhou Su <Jinzhou.Su@amd.com>,
	Xiaojian Du <Xiaojian.Du@amd.com>, <linux-kernel@vger.kernel.org>,
	<x86@kernel.org>, Huang Rui <ray.huang@amd.com>
Subject: [PATCH v4 15/22] cpupower: initial AMD P-state capability
Date: Fri, 19 Nov 2021 18:30:55 +0800	[thread overview]
Message-ID: <20211119103102.88124-16-ray.huang@amd.com> (raw)
In-Reply-To: <20211119103102.88124-1-ray.huang@amd.com>

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 --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) {
-- 
2.25.1

