linux-kernel - [PATCH v1 0/4] x86: Remove direct use of MSR_IA32_ENERGY_PERF

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Date:   Thu, 29 Oct 2020 20:02:55 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     X86 ML <x86@...nel.org>
Cc:     Thomas Renninger <trenn@...e.com>, Shuah Khan <shuah@...nel.org>,
        Len Brown <lenb@...nel.org>, linux-pm@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH v1 0/4] x86: Remove direct use of MSR_IA32_ENERGY_PERF_BIAS

From: Borislav Petkov <bp@...e.de>

Hi,

here's v2 with some of Shuah's comments integrated.

If no one has anything against it, I'll route them all through tip.

Thx.

---
Changelog:

v0:
--

here's something from my todo list: remove all in-kernel tools use of
that MSR and lastly drop it from the allowed-MSRs-list in the filtering.

Out-of-tree tools should do a similar, trivial conversion.

Constructive comments are, as always, appreciated.

Borislav Petkov (4):
  tools/power/cpupower: Read energy_perf_bias from sysfs
  tools/power/turbostat: Read energy_perf_bias from sysfs
  tools/power/x86_energy_perf_policy: Read energy_perf_bias from sysfs
  x86/msr: Do not allow writes to MSR_IA32_ENERGY_PERF_BIAS

 arch/x86/kernel/msr.c                         |   3 -
 tools/power/cpupower/lib/cpupower.c           |  23 +++-
 tools/power/cpupower/lib/cpupower_intern.h    |   5 +
 tools/power/cpupower/utils/cpupower-info.c    |   2 +-
 tools/power/cpupower/utils/cpupower-set.c     |   2 +-
 tools/power/cpupower/utils/helpers/helpers.h  |   8 +-
 tools/power/cpupower/utils/helpers/misc.c     |  48 ++++++++
 tools/power/cpupower/utils/helpers/msr.c      |  28 -----
 tools/power/x86/turbostat/turbostat.c         |  29 ++++-
 .../x86_energy_perf_policy.c                  | 109 ++++++++++++++++--
 10 files changed, 204 insertions(+), 53 deletions(-)

-- 
2.21.0