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Date: Tue, 8 Aug 2023 11:12:24 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Meng Li <li.meng@....com>
Cc: "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
Huang Rui <ray.huang@....com>, linux-pm@...r.kernel.org,
linux-kernel@...r.kernel.org, x86@...nel.org,
linux-acpi@...r.kernel.org, Shuah Khan <skhan@...uxfoundation.org>,
linux-kselftest@...r.kernel.org,
Nathan Fontenot <nathan.fontenot@....com>,
Deepak Sharma <deepak.sharma@....com>,
Alex Deucher <alexander.deucher@....com>,
Mario Limonciello <mario.limonciello@....com>,
Shimmer Huang <shimmer.huang@....com>,
Perry Yuan <Perry.Yuan@....com>,
Xiaojian Du <Xiaojian.Du@....com>,
Viresh Kumar <viresh.kumar@...aro.org>,
Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH V1 3/6] cpufreq: Add a notification message that the
highest perf has changed
On Tue, Aug 08, 2023 at 04:09:58PM +0800, Meng Li wrote:
> Please refer to the ACPI_Spec for details on the highest
> performance and notify events of CPPC.
Please summarise so that we don't get to click random links on the
interweb just to try and make sense of things.
> Signed-off-by: Meng Li <li.meng@....com>
> Link: https://uefi.org/htmlspecs/AddCPI_Spec_6_4_html/08_Processor_Configuration_and_Control/declaring-processors.html?highlight=0x85#highest-performance
> ---
> drivers/acpi/processor_driver.c | 6 ++++++
> drivers/cpufreq/cpufreq.c | 13 +++++++++++++
> include/linux/cpufreq.h | 4 ++++
> 3 files changed, 23 insertions(+)
>
> diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
> index 4bd16b3f0781..29b2fb68a35d 100644
> --- a/drivers/acpi/processor_driver.c
> +++ b/drivers/acpi/processor_driver.c
> @@ -27,6 +27,7 @@
> #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80
> #define ACPI_PROCESSOR_NOTIFY_POWER 0x81
> #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82
> +#define ACPI_PROCESSOR_NOTIFY_HIGEST_PERF_CHANGED 0x85
Isn't that spelled: 'highest' ?
^
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