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linux/arch/x86/kernel/cpu
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Rafael J. Wysocki b9c273babc PM / arch: x86: MSR_IA32_ENERGY_PERF_BIAS sysfs interface 
The Performance and Energy Bias Hint (EPB) is expected to be set by
user space through the generic MSR interface, but that interface is
not particularly nice and there are security concerns regarding it,
so it is not always available.

For this reason, add a sysfs interface for reading and updating the
EPB, in the form of a new attribute, energy_perf_bias, located
under /sys/devices/system/cpu/cpu#/power/ for online CPUs that
support the EPB feature.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Acked-by: Borislav Petkov <bp@suse.de>
2019-04-07 22:33:42 +02:00
..
mce Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-03-08 09:11:39 -08:00
microcode x86/microcode: Announce reload operation's completion 2019-03-21 12:24:39 +01:00
mtrr x86/mtrr: Remove unused variable 2019-02-08 14:32:33 +01:00
resctrl Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-03-12 14:08:19 -07:00
.gitignore
amd.c x86/CPU/AMD: Set the CPB bit unconditionally on F17h 2019-01-18 16:44:03 +01:00
aperfmperf.c x86/kernel: Fix more -Wmissing-prototypes warnings 2018-12-08 12:24:35 +01:00
bugs.c Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-03-05 12:50:34 -08:00
cacheinfo.c x86/kernel: Mark expected switch-case fall-throughs 2019-01-26 11:19:13 +01:00
centaur.c x86/CPU: Move x86_cpuinfo::x86_max_cores assignment to detect_num_cpu_cores() 2018-05-13 16:14:24 +02:00
common.c PM / arch: x86: Rework the MSR_IA32_ENERGY_PERF_BIAS handling 2019-04-07 22:33:19 +02:00
cpu.h PM / arch: x86: Rework the MSR_IA32_ENERGY_PERF_BIAS handling 2019-04-07 22:33:19 +02:00
cpuid-deps.c x86/cpuid: Switch to 'static const' specifier 2018-03-08 12:23:42 +01:00
cyrix.c x86/cpu/cyrix: Use correct macros for Cyrix calls on Geode processors 2019-03-21 12:28:50 +01:00
hygon.c x86/cpu: Get cache info and setup cache cpumap for Hygon Dhyana 2018-09-27 18:28:57 +02:00
hypervisor.c x86/jailhouse: Add infrastructure for running in non-root cell 2018-01-14 21:11:54 +01:00
intel_epb.c PM / arch: x86: MSR_IA32_ENERGY_PERF_BIAS sysfs interface 2019-04-07 22:33:42 +02:00
intel_pconfig.c x86/pconfig: Detect PCONFIG targets 2018-03-12 12:10:54 +01:00
intel.c PM / arch: x86: Rework the MSR_IA32_ENERGY_PERF_BIAS handling 2019-04-07 22:33:19 +02:00
Makefile PM / arch: x86: Rework the MSR_IA32_ENERGY_PERF_BIAS handling 2019-04-07 22:33:19 +02:00
match.c x86/cpufeature: Add facility to check for min microcode revisions 2019-02-11 07:59:23 +01:00
mkcapflags.sh License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mshyperv.c x86/Hyper-V: Set x2apic destination mode to physical when x2apic is available 2019-02-28 11:12:16 +01:00
perfctr-watchdog.c x86/events: Add Hygon Dhyana support to PMU infrastructure 2018-09-27 18:28:57 +02:00
powerflags.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
proc.c x86/cpu: Change type of x86_cache_size variable to unsigned int 2018-02-15 01:15:53 +01:00
rdrand.c x86, asm: Use CC_SET()/CC_OUT() and static_cpu_has() in archrandom.h 2016-06-08 12:41:20 -07:00
scattered.c Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-12-26 17:35:41 -08:00
topology.c x86/kernel: Fix more -Wmissing-prototypes warnings 2018-12-08 12:24:35 +01:00
transmeta.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
umc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vmware.c x86/cpu/vmware: Do not trace vmware_sched_clock() 2018-11-09 21:39:14 +01:00