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/Linux-v4.19/Documentation/admin-guide/pm/
Dintel_pstate.rst2 ``intel_pstate`` CPU Performance Scaling Driver
13 ``intel_pstate`` is a part of the
17 may not be supported. [To understand ``intel_pstate`` it is necessary to know
21 For the processors supported by ``intel_pstate``, the P-state concept is broader
25 by ``intel_pstate`` internally follows the hardware specification (for details
30 ``intel_pstate`` maps its internal representation of P-states to frequencies too
32 practical for ``intel_pstate`` to supply the ``CPUFreq`` core with a table of
36 Since the hardware P-state selection interface used by ``intel_pstate`` is
38 CPUs. Consequently, if ``intel_pstate`` is in use, every ``CPUFreq`` policy
44 ``intel_pstate`` is not modular, so it cannot be unloaded, which means that the
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Dworking-state.rst9 intel_pstate
Dcpufreq.rst2 .. |intel_pstate| replace:: :doc:`intel_pstate <intel_pstate>` substdef
79 algorithms. That is done by the |intel_pstate| scaling driver.
178 As mentioned before, the |intel_pstate| scaling driver bypasses the scaling
180 Consequently, if |intel_pstate| is used, scaling governors are not attached to
184 governors, but in the |intel_pstate| case they both determine the P-state to
269 be attached to this policy or (if the |intel_pstate| scaling driver is
296 |intel_pstate| scaling driver is in use) the scaling algorithm
302 |intel_pstate| case), as indicated by the string written to this
623 |intel_pstate|).
/Linux-v4.19/tools/testing/selftests/intel_pstate/
Drun.sh69 max_perf_pct=$(cat /sys/devices/system/cpu/intel_pstate/max_perf_pct)
/Linux-v4.19/tools/testing/selftests/
DMakefile16 TARGETS += intel_pstate
/Linux-v4.19/drivers/gpu/drm/i915/
Dintel_pm.c4050 struct intel_plane_state *intel_pstate; in skl_check_pipe_max_pixel_rate() local
4071 intel_pstate = to_intel_plane_state(pstate); in skl_check_pipe_max_pixel_rate()
4073 intel_pstate); in skl_check_pipe_max_pixel_rate()
4107 struct intel_plane_state *intel_pstate = to_intel_plane_state(pstate); in skl_plane_relative_data_rate() local
4114 if (!intel_pstate->base.visible) in skl_plane_relative_data_rate()
4130 width = drm_rect_width(&intel_pstate->base.src) >> 16; in skl_plane_relative_data_rate()
4131 height = drm_rect_height(&intel_pstate->base.src) >> 16; in skl_plane_relative_data_rate()
4141 down_scale_amount = skl_plane_downscale_amount(cstate, intel_pstate); in skl_plane_relative_data_rate()
4192 struct intel_plane_state *intel_pstate = to_intel_plane_state(pstate); in skl_ddb_min_alloc() local
4216 src_w = drm_rect_width(&intel_pstate->base.src) >> 16; in skl_ddb_min_alloc()
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/Linux-v4.19/drivers/cpufreq/
Dintel_pstate.c2117 static struct cpufreq_driver intel_pstate = { variable
2263 static struct cpufreq_driver *default_driver = &intel_pstate;
2272 if (intel_pstate_driver == &intel_pstate) in intel_pstate_driver_cleanup()
2318 return sprintf(buf, "%s\n", intel_pstate_driver == &intel_pstate ? in intel_pstate_show_status()
2332 if (intel_pstate_driver == &intel_pstate) in intel_pstate_update_status()
2340 return intel_pstate_register_driver(&intel_pstate); in intel_pstate_update_status()
2540 intel_pstate.attr = hwp_cpufreq_attrs; in intel_pstate_init()
DMakefile44 obj-$(CONFIG_X86_INTEL_PSTATE) += intel_pstate.o
/Linux-v4.19/Documentation/ABI/testing/
Dsysfs-devices-system-cpu301 What: /sys/devices/system/cpu/intel_pstate/max_perf_pct
302 /sys/devices/system/cpu/intel_pstate/min_perf_pct
303 /sys/devices/system/cpu/intel_pstate/no_turbo
323 Documentation/admin-guide/pm/intel_pstate.rst
/Linux-v4.19/Documentation/admin-guide/
Dkernel-parameters.txt1691 intel_pstate= [X86]
1693 Do not enable intel_pstate as the default
1696 Use intel_pstate as a scaling driver, but configure it
1702 Enable intel_pstate on systems that prohibit it by default
1703 in favor of acpi-cpufreq. Forcing the intel_pstate driver
1708 processors that aren't supported by the intel_pstate driver
1714 Only load intel_pstate on systems which support
/Linux-v4.19/
DMAINTAINERS7527 F: drivers/cpufreq/intel_pstate.c