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From:   Huang Rui <ray.huang@amd.com>
To:     "Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
        Viresh Kumar <viresh.kumar@linaro.org>,
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        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 14/19] cpupower: initial AMD P-state capability
Date:   Wed, 8 Sep 2021 22:59:56 +0800
Message-ID: <20210908150001.3702552-15-ray.huang@amd.com>
In-Reply-To: <20210908150001.3702552-1-ray.huang@amd.com>
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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) {
-- 
2.25.1