tools/cpupower: Choose base_cpu to display default cpupower details

The default output of cpupower info utils shows unexpected output
when CPU 0 is disabled.

Considering a case where CPU 0 is disabled, output of cpupower idle-info:

Before change:
cpupower idle-info
CPUidle driver: pseries_idle
CPUidle governor: menu
analyzing CPU 0:
*is offline

After change:
./cpupower idle-info
CPUidle driver: pseries_idle
CPUidle governor: menu
analyzing CPU 50:

Number of idle states: 2
Available idle states: snooze CEDE
snooze:
Flags/Description: snooze
Latency: 0
Usage: 101748
Duration: 2724058
CEDE:
Flags/Description: CEDE
Latency: 12
Usage: 270004
Duration: 283019526849

If -c option is not passed, CPU 0 was chosen as the default chosen CPU to
display details. However when CPU 0 is offline, it results in showing
unexpected output. This commit chooses the base_cpu
instead of CPU 0, hence keeping the output more relevant in all cases.
The base_cpu is the number of CPU on which the calling thread is
currently executing.

Signed-off-by: Saket Kumar Bhaskar <skb99@linux.vnet.ibm.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

tools/power/cpupower: Read energy_perf_bias from sysfs

... instead of poking at the MSR. For that, move the accessor functions
to misc.c and add a sysfs-writing function too.

There should be no functional changes resulting from this.

Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Cc: Thomas Renninger <trenn@suse.com>
Link: https://lkml.kernel.org/r/20201029190259.3476-2-bp@alien8.de

cpupower: Remove unneeded semicolon

Fixes coccicheck warnings:

tools/power/cpupower/utils/cpupower-info.c:65:2-3: Unneeded semicolon
tools/power/cpupower/utils/cpupower-set.c:75:2-3: Unneeded semicolon
tools/power/cpupower/utils/idle_monitor/amd_fam14h_idle.c:120:2-3: Unneeded semicolon
tools/power/cpupower/utils/idle_monitor/cpuidle_sysfs.c:175:2-3: Unneeded semicolon
tools/power/cpupower/utils/idle_monitor/cpuidle_sysfs.c:56:2-3: Unneeded semicolon
tools/power/cpupower/utils/idle_monitor/cpuidle_sysfs.c:75:2-3: Unneeded semicolon
tools/power/cpupower/utils/idle_monitor/hsw_ext_idle.c:82:2-3: Unneeded semicolon
tools/power/cpupower/utils/idle_monitor/nhm_idle.c:94:2-3: Unneeded semicolon
tools/power/cpupower/utils/idle_monitor/snb_idle.c:80:2-3: Unneeded semicolon

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zou Wei <zou_wei@huawei.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

cpupower : Handle set and info subcommands correctly

Cpupower tool has set and info options which are being used only by
x86 machines. This patch removes support for these two subcommands
from cpupower utility for POWER. Thus, these two subcommands will now be
available only for intel.
This removes the ambiguous error message while using set option in case
of using non-intel systems.

Without this patch on a POWER system:

root@ubuntu:~# cpupower info
System does not support Intel's performance bias setting

root@ubuntu:~# cpupower set -b 10
Error setting perf-bias value on CPU

With this patch on a POWER box:

root@ubuntu:~# cpupower info
Subcommand not supported on POWER

Same result for set subcommand.
This patch does not affect results on a intel box.

Signed-off-by: Abhishek Goel <huntbag@linux.vnet.ibm.com>
Acked-by: Thomas Renninger <trenn@suse.de>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166

Based on 1 normalized pattern(s):

licensed under the terms of the gnu gpl license version 2

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference in 62 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.929121379@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

cpupower: Do not analyse offlined cpus

Use sysfs_is_cpu_online(cpu) instead of cpufreq_cpu_exists(cpu) to detect offlined cpus.

Re-arrange printfs slightly to have a consistent output even if you have multiple CPUs
as output and even if offlined cores are in between.

Signed-off-by: Thomas Renninger <trenn@suse.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Creating a common structure initialization pattern for struct option

This patch tries to creates a common structure initialization
within the cpupower tool.

Previously the ``struct option`` was initialized
using `designated initializer` technique which was
not needed. There were conflicting initialization methods seen with

bench/main.c & others.

Signed-off-by: Sriram Raghunathan <sriram@marirs.net.in>
Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

cpupower: Remove mc and smt power aware scheduler info/settings

These kernel interfaces got removed by:

commit 8e7fbcbc22c12414bcc9dfdd683637f58fb32759
Author: Peter Zijlstra <peterz@infradead.org>
Date: Mon Jan 9 11:28:35 2012 +0100

sched: Remove stale power aware scheduling remnants and dysfunctional knobs

No need to further keep them as userspace configurations.

Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

cpupower: cpupower info -b should return 0 on success, not the perf bias value

Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

cpupower: use man(1) when calling "cpupower help subcommand"

Instead of printing something non-formatted to stdout, call
man(1) to show the man page for the proper subcommand.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

cpupowerutils: utils - ConfigStyle bugfixes

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

cpupowerutils - cpufrequtils extended with quite some features

CPU power consumption vs performance tuning is no longer
limited to CPU frequency switching anymore: deep sleep states,
traditional dynamic frequency scaling and hidden turbo/boost
frequencies are tied close together and depend on each other.
The first two exist on different architectures like PPC, Itanium and
ARM, the latter (so far) only on X86. On X86 the APU (CPU+GPU) will
only run most efficiently if CPU and GPU has proper power management
in place.

Users and Developers want to have *one* tool to get an overview what
their system supports and to monitor and debug CPU power management
in detail. The tool should compile and work on as many architectures
as possible.

Once this tool stabilizes a bit, it is intended to replace the
Intel-specific tools in tools/power/x86

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>