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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>,
	Shuah Khan <skhan@linuxfoundation.org>,
	"Borislav Petkov" <bp@suse.de>, Ingo Molnar <mingo@kernel.org>,
	<linux-pm@vger.kernel.org>
Cc: Deepak Sharma <deepak.sharma@amd.com>,
	Alex Deucher <alexander.deucher@amd.com>,
	Mario Limonciello <mario.limonciello@amd.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 09/19] cpufreq: amd: add amd-pstate checking support check attribute
Date: Wed, 8 Sep 2021 22:59:51 +0800	[thread overview]
Message-ID: <20210908150001.3702552-10-ray.huang@amd.com> (raw)
In-Reply-To: <20210908150001.3702552-1-ray.huang@amd.com>

The amd-pstate hardware support check will be needed by cpupower to know
whether amd-pstate is enabled and supported.

Signed-off-by: Huang Rui <ray.huang@amd.com>
---
 drivers/cpufreq/amd-pstate.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 67a9a117f524..48dedd5af101 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -577,6 +577,19 @@ static int amd_pstate_cpu_exit(struct cpufreq_policy *policy)
 	return 0;
 }
 
+static ssize_t show_is_amd_pstate_enabled(struct cpufreq_policy *policy,
+					char *buf)
+{
+	return sprintf(&buf[0], "%d\n", acpi_cpc_valid() ?  1 : 0);
+}
+
+cpufreq_freq_attr_ro(is_amd_pstate_enabled);
+
+static struct freq_attr *amd_pstate_attr[] = {
+	&is_amd_pstate_enabled,
+	NULL,
+};
+
 static struct cpufreq_driver amd_pstate_driver = {
 	.flags		= CPUFREQ_CONST_LOOPS | CPUFREQ_NEED_UPDATE_LIMITS,
 	.verify		= amd_pstate_verify,
@@ -586,6 +599,7 @@ static struct cpufreq_driver amd_pstate_driver = {
 	.exit		= amd_pstate_cpu_exit,
 	.set_boost	= amd_pstate_set_boost,
 	.name		= "amd-pstate",
+	.attr		= amd_pstate_attr,
 };
 
 static int __init amd_pstate_init(void)
-- 
2.25.1


  parent reply	other threads:[~2021-09-08 15:01 UTC|newest]

Thread overview: 59+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-08 14:59 [PATCH 00/19] cpufreq: introduce a new AMD CPU frequency control mechanism Huang Rui
2021-09-08 14:59 ` [PATCH 01/19] x86/cpufreatures: add AMD CPPC extension feature flag Huang Rui
2021-09-08 20:00   ` Shuah Khan
2021-09-09  9:45     ` Huang Rui
2021-09-09 17:58   ` Borislav Petkov
2021-09-13  9:48     ` Huang Rui
2021-09-13 13:04       ` Borislav Petkov
2021-09-16  9:30         ` Huang Rui
2021-09-08 14:59 ` [PATCH 02/19] x86/msr: add AMD CPPC MSR definitions Huang Rui
2021-09-08 14:59 ` [PATCH 03/19] ACPI: CPPC: add cppc enable register function Huang Rui
2021-09-08 19:14   ` Fontenot, Nathan
2021-09-09  9:50     ` Huang Rui
2021-09-09  0:21   ` Shuah Khan
2021-09-09  9:58     ` Huang Rui
2021-09-08 14:59 ` [PATCH 04/19] cpufreq: amd: introduce a new amd pstate driver to support future processors Huang Rui
2021-09-09 15:01   ` Peter Zijlstra
2021-09-13  8:11     ` Huang Rui
2021-09-13  8:56       ` Peter Zijlstra
2021-09-13 10:54         ` Huang Rui
2021-09-13 11:56           ` Peter Zijlstra
2021-09-16 10:09             ` Huang Rui
2021-09-16 11:19               ` Rafael J. Wysocki
2021-09-17  3:41                 ` Huang Rui
2021-09-09 15:03   ` Peter Zijlstra
2021-09-13 11:55     ` Huang Rui
2021-09-09 19:31   ` Fontenot, Nathan
2021-09-13 11:18     ` Huang Rui
2021-09-08 14:59 ` [PATCH 05/19] cpufreq: amd: add fast switch function for amd-pstate module Huang Rui
2021-09-08 14:59 ` [PATCH 06/19] cpufreq: amd: add acpi cppc function as the backend for legacy processors Huang Rui
2021-09-08 14:59 ` [PATCH 07/19] cpufreq: amd: add trace for amd-pstate module Huang Rui
2021-09-08 14:59 ` [PATCH 08/19] cpufreq: amd: add boost mode support for amd-pstate Huang Rui
2021-09-08 18:24   ` Fontenot, Nathan
2021-09-09 10:12     ` Huang Rui
2021-09-08 14:59 ` Huang Rui [this message]
2021-09-08 14:59 ` [PATCH 10/19] cpufreq: amd: add amd-pstate frequencies attributes Huang Rui
2021-09-08 18:13   ` Fontenot, Nathan
2021-09-08 14:59 ` [PATCH 11/19] cpufreq: amd: add amd-pstate performance attributes Huang Rui
2021-09-08 18:20   ` Fontenot, Nathan
2021-09-08 14:59 ` [PATCH 12/19] cpupower: add AMD P-state capability flag Huang Rui
2021-09-08 14:59 ` [PATCH 13/19] cpupower: add the function to check amd-pstate enabled Huang Rui
2021-09-09 22:16   ` Shuah Khan
2021-09-13 11:29     ` Huang Rui
2021-09-08 14:59 ` [PATCH 14/19] cpupower: initial AMD P-state capability Huang Rui
2021-09-09 22:16   ` Shuah Khan
2021-09-13 12:58     ` Huang Rui
2021-09-08 14:59 ` [PATCH 15/19] cpupower: add amd-pstate sysfs entries into libcpufreq Huang Rui
2021-09-09 22:26   ` Shuah Khan
2021-09-16  8:47     ` Huang Rui
2021-09-08 14:59 ` [PATCH 16/19] cpupower: enable boost state support for amd-pstate module Huang Rui
2021-09-08 17:32   ` Fontenot, Nathan
2021-09-09  9:59     ` Huang Rui
2021-09-09 22:42   ` Shuah Khan
2021-09-16  9:27     ` Huang Rui
2021-09-08 14:59 ` [PATCH 17/19] cpupower: add amd-pstate get data function to query the info Huang Rui
2021-09-09 22:45   ` Shuah Khan
2021-09-08 15:00 ` [PATCH 18/19] cpupower: print amd-pstate information on cpupower Huang Rui
2021-09-09 22:46   ` Shuah Khan
2021-09-16  9:29     ` Huang Rui
2021-09-08 15:00 ` [PATCH 19/19] Documentation: amd-pstate: add amd-pstate driver introduction Huang Rui

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