linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
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>, <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 v2 10/21] cpufreq: amd: add amd-pstate checking support check attribute
Date: Sun, 26 Sep 2021 17:05:54 +0800	[thread overview]
Message-ID: <20210926090605.3556134-11-ray.huang@amd.com> (raw)
In-Reply-To: <20210926090605.3556134-1-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 847ba00e3351..74f896232d5a 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -517,6 +517,19 @@ 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,
@@ -525,6 +538,7 @@ 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:[~2021-09-26  9:07 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-26  9:05 [PATCH v2 00/21] cpufreq: introduce a new AMD CPU frequency control mechanism Huang Rui
2021-09-26  9:05 ` [PATCH v2 01/21] x86/cpufreatures: add AMD Collaborative Processor Performance Control feature flag Huang Rui
2021-09-26  9:05 ` [PATCH v2 02/21] x86/msr: add AMD CPPC MSR definitions Huang Rui
2021-09-26  9:05 ` [PATCH v2 03/21] ACPI: CPPC: Check online CPUs for determining _CPC is valid Huang Rui
2021-10-19 16:52   ` Rafael J. Wysocki
2021-10-20 11:15     ` Huang, Ray
2021-09-26  9:05 ` [PATCH v2 04/21] ACPI: CPPC: add cppc enable register function Huang Rui
2021-09-28 17:06   ` Fontenot, Nathan
2021-10-13 12:28     ` Huang, Ray
2021-10-19 16:59   ` Rafael J. Wysocki
2021-10-20 11:13     ` Huang, Ray
2021-10-20 13:32       ` Rafael J. Wysocki
2021-10-21  3:41         ` Huang, Ray
2021-09-26  9:05 ` [PATCH v2 05/21] cpufreq: amd: introduce a new amd pstate driver to support future processors Huang Rui
2021-09-28 20:40   ` Fontenot, Nathan
2021-10-14 10:14     ` Huang, Ray
2021-09-26  9:05 ` [PATCH v2 06/21] cpufreq: amd: add fast switch function for amd-pstate module Huang Rui
2021-09-26  9:05 ` [PATCH v2 07/21] cpufreq: amd: add acpi cppc function as the backend for legacy processors Huang Rui
2021-09-26  9:05 ` [PATCH v2 08/21] cpufreq: amd: add trace for amd-pstate module Huang Rui
2021-10-06  8:12   ` Giovanni Gherdovich
2021-10-21 10:19     ` Huang, Ray
2021-09-26  9:05 ` [PATCH v2 09/21] cpufreq: amd: add boost mode support for amd-pstate Huang Rui
2021-09-26  9:05 ` Huang Rui [this message]
2021-09-28 21:24   ` [PATCH v2 10/21] cpufreq: amd: add amd-pstate checking support check attribute Fontenot, Nathan
2021-10-14 10:26     ` Huang, Ray
2021-09-26  9:05 ` [PATCH v2 11/21] cpufreq: amd: add amd-pstate frequencies attributes Huang Rui
2021-09-28 21:35   ` Fontenot, Nathan
2021-10-14 10:35     ` Huang, Ray
2021-09-26  9:05 ` [PATCH v2 12/21] cpufreq: amd: add amd-pstate performance attributes Huang Rui
2021-09-26  9:05 ` [PATCH v2 13/21] cpupower: add AMD P-state capability flag Huang Rui
2021-09-26  9:05 ` [PATCH v2 14/21] cpupower: add the function to check amd-pstate enabled Huang Rui
2021-09-26  9:05 ` [PATCH v2 15/21] cpupower: initial AMD P-state capability Huang Rui
2021-09-26  9:06 ` [PATCH v2 16/21] cpupower: add the function to get the sysfs value from specific table Huang Rui
2021-09-26  9:06 ` [PATCH v2 17/21] cpupower: add amd-pstate sysfs definition and access helper Huang Rui
2021-09-26  9:06 ` [PATCH v2 18/21] cpupower: enable boost state support for amd-pstate module Huang Rui
2021-09-26  9:06 ` [PATCH v2 19/21] cpupower: move print_speed function into misc helper Huang Rui
2021-09-26  9:06 ` [PATCH v2 20/21] cpupower: print amd-pstate information on cpupower Huang Rui
2021-09-26  9:06 ` [PATCH v2 21/21] Documentation: amd-pstate: add amd-pstate driver introduction Huang Rui
2021-10-13 16:23   ` Giovanni Gherdovich
2021-10-14 11:30     ` Huang, Ray

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210926090605.3556134-11-ray.huang@amd.com \
    --to=ray.huang@amd.com \
    --cc=Jinzhou.Su@amd.com \
    --cc=Xiaojian.Du@amd.com \
    --cc=alexander.deucher@amd.com \
    --cc=bp@suse.de \
    --cc=deepak.sharma@amd.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-pm@vger.kernel.org \
    --cc=mario.limonciello@amd.com \
    --cc=mingo@kernel.org \
    --cc=nathan.fontenot@amd.com \
    --cc=peterz@infradead.org \
    --cc=rafael.j.wysocki@intel.com \
    --cc=skhan@linuxfoundation.org \
    --cc=viresh.kumar@linaro.org \
    --cc=x86@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).