| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <Ylt264e1r3r/ddQb@amd.com>
Date: Sun, 17 Apr 2022 10:09:47 +0800
From: Huang Rui <ray.huang@....com>
To: Meng Li <li.meng@....com>
Cc: Shuah Khan <skhan@...uxfoundation.org>,
"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
linux-pm@...r.kernel.org,
Nathan Fontenot <nathan.fontenot@....com>,
Deepak Sharma <deepak.sharma@....com>,
Alex Deucher <alexander.deucher@....com>,
Mario Limonciello <mario.limonciello@....com>,
Jinzhou Su <Jinzhou.Su@....com>,
Perry Yuan <Perry.Yuan@....com>,
Xiaojian Du <Xiaojian.Du@....com>,
Viresh Kumar <viresh.kumar@...aro.org>,
Borislav Petkov <bp@...en8.de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] cpufreq: amd-pstate: Expose struct amd_cpudata
On Wed, Apr 13, 2022 at 05:05:08PM +0800, Meng Li wrote:
> Expose struct amd_cpudata to AMD P-State unit test module.
>
> This data struct will be used on the following AMD P-State unit test
> (amd-pstate-ut) module. The amd-pstate-ut module can get some AMD
> infomations by this data struct. For example: highest perf,
> nominal perf, boost supported etc.
>
> Signed-off-by: Meng Li <li.meng@....com>
Acked-by: Huang Rui <ray.huang@....com>
> ---
> MAINTAINERS | 1 +
> drivers/cpufreq/amd-pstate.c | 60 +----------------------------
> include/linux/amd-pstate.h | 74 ++++++++++++++++++++++++++++++++++++
> 3 files changed, 76 insertions(+), 59 deletions(-)
> create mode 100644 include/linux/amd-pstate.h
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 9832b607e2e2..f108e83ba851 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -1003,6 +1003,7 @@ S: Supported
> F: Documentation/admin-guide/pm/amd-pstate.rst
> F: drivers/cpufreq/amd-pstate*
> F: tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py
> +F: include/linux/amd-pstate.h
>
> AMD PTDMA DRIVER
> M: Sanjay R Mehta <sanju.mehta@....com>
> diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
> index 7be38bc6a673..5f7a00a64f76 100644
> --- a/drivers/cpufreq/amd-pstate.c
> +++ b/drivers/cpufreq/amd-pstate.c
> @@ -36,6 +36,7 @@
> #include <linux/delay.h>
> #include <linux/uaccess.h>
> #include <linux/static_call.h>
> +#include <linux/amd-pstate.h>
>
> #include <acpi/processor.h>
> #include <acpi/cppc_acpi.h>
> @@ -65,65 +66,6 @@ MODULE_PARM_DESC(shared_mem,
>
> static struct cpufreq_driver amd_pstate_driver;
>
> -/**
> - * struct amd_aperf_mperf
> - * @aperf: actual performance frequency clock count
> - * @mperf: maximum performance frequency clock count
> - * @tsc: time stamp counter
> - */
> -struct amd_aperf_mperf {
> - u64 aperf;
> - u64 mperf;
> - u64 tsc;
> -};
> -
> -/**
> - * struct amd_cpudata - private CPU data for AMD P-State
> - * @cpu: CPU number
> - * @req: constraint request to apply
> - * @cppc_req_cached: cached performance request hints
> - * @highest_perf: the maximum performance an individual processor may reach,
> - * assuming ideal conditions
> - * @nominal_perf: the maximum sustained performance level of the processor,
> - * assuming ideal operating conditions
> - * @lowest_nonlinear_perf: the lowest performance level at which nonlinear power
> - * savings are achieved
> - * @lowest_perf: the absolute lowest performance level of the processor
> - * @max_freq: the frequency that mapped to highest_perf
> - * @min_freq: the frequency that mapped to lowest_perf
> - * @nominal_freq: the frequency that mapped to nominal_perf
> - * @lowest_nonlinear_freq: the frequency that mapped to lowest_nonlinear_perf
> - * @cur: Difference of Aperf/Mperf/tsc count between last and current sample
> - * @prev: Last Aperf/Mperf/tsc count value read from register
> - * @freq: current cpu frequency value
> - * @boost_supported: check whether the Processor or SBIOS supports boost mode
> - *
> - * The amd_cpudata is key private data for each CPU thread in AMD P-State, and
> - * represents all the attributes and goals that AMD P-State requests at runtime.
> - */
> -struct amd_cpudata {
> - int cpu;
> -
> - struct freq_qos_request req[2];
> - u64 cppc_req_cached;
> -
> - u32 highest_perf;
> - u32 nominal_perf;
> - u32 lowest_nonlinear_perf;
> - u32 lowest_perf;
> -
> - u32 max_freq;
> - u32 min_freq;
> - u32 nominal_freq;
> - u32 lowest_nonlinear_freq;
> -
> - struct amd_aperf_mperf cur;
> - struct amd_aperf_mperf prev;
> -
> - u64 freq;
> - bool boost_supported;
> -};
> -
> static inline int pstate_enable(bool enable)
> {
> return wrmsrl_safe(MSR_AMD_CPPC_ENABLE, enable);
> diff --git a/include/linux/amd-pstate.h b/include/linux/amd-pstate.h
> new file mode 100644
> index 000000000000..790b04c9000b
> --- /dev/null
> +++ b/include/linux/amd-pstate.h
> @@ -0,0 +1,74 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * linux/include/linux/amd-pstate.h
> + *
> + * Copyright (C) 2007-2010 Advanced Micro Devices, Inc.
> + * Author: Meng Li <li.meng@....com>
> + */
> +#ifndef _LINUX_AMD_PSTATE_H
> +#define _LINUX_AMD_PSTATE_H
> +
> +#include <linux/pm_qos.h>
> +/*********************************************************************
> + * AMD P-state INTERFACE *
> + *********************************************************************/
> +/**
> + * struct amd_aperf_mperf
> + * @aperf: actual performance frequency clock count
> + * @mperf: maximum performance frequency clock count
> + * @tsc: time stamp counter
> + */
> +struct amd_aperf_mperf {
> + u64 aperf;
> + u64 mperf;
> + u64 tsc;
> +};
> +
> +/**
> + * struct amd_cpudata - private CPU data for AMD P-State
> + * @cpu: CPU number
> + * @req: constraint request to apply
> + * @cppc_req_cached: cached performance request hints
> + * @highest_perf: the maximum performance an individual processor may reach,
> + * assuming ideal conditions
> + * @nominal_perf: the maximum sustained performance level of the processor,
> + * assuming ideal operating conditions
> + * @lowest_nonlinear_perf: the lowest performance level at which nonlinear power
> + * savings are achieved
> + * @lowest_perf: the absolute lowest performance level of the processor
> + * @max_freq: the frequency that mapped to highest_perf
> + * @min_freq: the frequency that mapped to lowest_perf
> + * @nominal_freq: the frequency that mapped to nominal_perf
> + * @lowest_nonlinear_freq: the frequency that mapped to lowest_nonlinear_perf
> + * @cur: Difference of Aperf/Mperf/tsc count between last and current sample
> + * @prev: Last Aperf/Mperf/tsc count value read from register
> + * @freq: current cpu frequency value
> + * @boost_supported: check whether the Processor or SBIOS supports boost mode
> + *
> + * The amd_cpudata is key private data for each CPU thread in AMD P-State, and
> + * represents all the attributes and goals that AMD P-State requests at runtime.
> + */
> +struct amd_cpudata {
> + int cpu;
> +
> + struct freq_qos_request req[2];
> + u64 cppc_req_cached;
> +
> + u32 highest_perf;
> + u32 nominal_perf;
> + u32 lowest_nonlinear_perf;
> + u32 lowest_perf;
> +
> + u32 max_freq;
> + u32 min_freq;
> + u32 nominal_freq;
> + u32 lowest_nonlinear_freq;
> +
> + struct amd_aperf_mperf cur;
> + struct amd_aperf_mperf prev;
> +
> + u64 freq;
> + bool boost_supported;
> +};
> +
> +#endif /* _LINUX_AMD_PSTATE_H */
> --
> 2.25.1
>
Powered by blists - more mailing lists