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linux-stable/drivers/cpufreq
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Rafael J. Wysocki 53d7eed031 cpufreq: intel_pstate: Use HWP if enabled by platform firmware 
commit e5af36b2ad upstream.

It turns out that there are systems where HWP is enabled during
initialization by the platform firmware (BIOS), but HWP EPP support
is not advertised.

After commit 7aa1031223 ("cpufreq: intel_pstate: Avoid enabling HWP
if EPP is not supported") intel_pstate refuses to use HWP on those
systems, but the fallback PERF_CTL interface does not work on them
either because of enabled HWP, and once enabled, HWP cannot be
disabled.  Consequently, the users of those systems cannot control
CPU performance scaling.

Address this issue by making intel_pstate use HWP unconditionally if
it is enabled already when the driver starts.

Fixes: 7aa1031223 ("cpufreq: intel_pstate: Avoid enabling HWP if EPP is not supported")
Reported-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: 5.9+ <stable@vger.kernel.org> # 5.9+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-19 10:12:51 +02:00
..
acpi-cpufreq.c cpufreq: ACPI: Set cpuinfo.max_freq directly if max boost is known 2021-03-04 11:38:22 +01:00
amd_freq_sensitivity.c cpufreq: amd_freq_sensitivity: Mark sometimes used ID structs as __maybe_unused 2020-07-15 15:17:06 +02:00
armada-8k-cpufreq.c cpufreq: ap806: Add missing MODULE_DEVICE_TABLE 2020-12-30 11:53:37 +01:00
armada-37xx-cpufreq.c cpufreq: armada-37xx: Fix determining base CPU frequency 2021-05-14 09:50:17 +02:00
bmips-cpufreq.c cpufreq: Make cpufreq_generic_init() return void 2019-07-16 10:20:11 +02:00
brcmstb-avs-cpufreq.c cpufreq: brcmstb-avs-cpufreq: Fix resource leaks in ->remove() 2021-03-04 11:37:24 +01:00
cppc_cpufreq.c cpufreq: CPPC: Reuse caps variable in few routines 2020-07-30 10:57:47 +05:30
cpufreq-dt-platdev.c cpufreq: blacklist Arm Vexpress platforms in cpufreq-dt-platdev 2021-03-30 14:31:49 +02:00
cpufreq-dt.c Merge branch 'cpufreq/arm/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm 2020-10-06 12:26:45 +02:00
cpufreq-dt.h cpufreq: dt: Allow platform specific intermediate callbacks 2020-03-12 15:43:52 +05:30
cpufreq-nforce2.c cpufreq: Avoid creating excessively large stack frames 2020-01-27 10:33:33 +01:00
cpufreq.c cpufreq: Add strict_target to struct cpufreq_policy 2020-11-10 18:31:17 +01:00
cpufreq_conservative.c cpufreq: Register governors at core_initcall 2020-07-02 13:03:30 +02:00
cpufreq_governor.c cpufreq: cpufreq_governor: Demote store_sampling_rate() header to standard comment block 2020-07-15 15:17:06 +02:00
cpufreq_governor.h cpufreq: Introduce governor flags 2020-11-10 18:31:17 +01:00
cpufreq_governor_attr_set.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cpufreq_ondemand.c cpufreq: Register governors at core_initcall 2020-07-02 13:03:30 +02:00
cpufreq_ondemand.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cpufreq_performance.c cpufreq: Introduce CPUFREQ_GOV_STRICT_TARGET 2020-11-10 18:31:17 +01:00
cpufreq_powersave.c cpufreq: Introduce CPUFREQ_GOV_STRICT_TARGET 2020-11-10 18:31:17 +01:00
cpufreq_stats.c cpufreq: stats: Fix string format specifier mismatch 2020-10-12 12:32:10 +02:00
cpufreq_userspace.c cpufreq: Register governors at core_initcall 2020-07-02 13:03:30 +02:00
davinci-cpufreq.c cpufreq: Replace HTTP links with HTTPS ones 2020-07-13 17:54:37 +02:00
e_powersaver.c cpufreq: e_powersaver: remove unreachable break 2020-10-27 18:42:54 +01:00
elanfreq.c cpufreq: Convert to new X86 CPU match macros 2020-03-24 21:31:27 +01:00
freq_table.c cpufreq: ACPI: Set cpuinfo.max_freq directly if max boost is known 2021-03-04 11:38:22 +01:00
gx-suspmod.c cpufreq: Avoid creating excessively large stack frames 2020-01-27 10:33:33 +01:00
highbank-cpufreq.c cpufreq: highbank: Add missing MODULE_DEVICE_TABLE 2020-12-30 11:53:38 +01:00
ia64-acpi-cpufreq.c
imx-cpufreq-dt.c cpufreq: imx-cpufreq-dt: support i.MX7ULP 2020-04-28 14:26:20 +05:30
imx6q-cpufreq.c cpufreq: imx6q: Unconditionally call dev_pm_opp_of_remove_table() 2020-09-10 16:36:09 +05:30
intel_pstate.c cpufreq: intel_pstate: Use HWP if enabled by platform firmware 2021-05-19 10:12:51 +02:00
Kconfig cpufreq: Avoid configuring old governors as default with intel_pstate 2020-10-27 18:45:34 +01:00
Kconfig.arm cpufreq: imx: fix NVMEM_IMX_OCOTP dependency 2020-12-30 11:53:39 +01:00
Kconfig.powerpc cpufreq: Fix Kconfig indentation 2019-11-29 11:52:02 +01:00
Kconfig.x86 treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
kirkwood-cpufreq.c cpufreq: kirkwood: convert to devm_platform_ioremap_resource 2020-01-07 13:29:58 +05:30
longhaul.c cpufreq: e_powersaver: remove unreachable break 2020-10-27 18:42:54 +01:00
longhaul.h
longrun.c cpufreq: Convert to new X86 CPU match macros 2020-03-24 21:31:27 +01:00
loongson1-cpufreq.c cpufreq: loongson1: Add missing MODULE_ALIAS 2020-12-30 11:53:38 +01:00
loongson2_cpufreq.c mips: loongsoon2ef: remove private clk api 2020-04-16 17:34:23 +02:00
Makefile Merge branch 'cpufreq/arm/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm 2020-08-04 12:44:53 +02:00
maple-cpufreq.c Merge branch 'pm-cpufreq' 2019-07-18 09:49:30 +02:00
mediatek-cpufreq.c cpufreq: mediatek: Add missing MODULE_DEVICE_TABLE 2020-12-30 11:53:38 +01:00
mvebu-cpufreq.c
omap-cpufreq.c OPP: refactor dev_pm_opp_of_register_em() and update related drivers 2020-06-24 17:16:42 +02:00
p4-clockmod.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
pasemi-cpufreq.c cpufreq: pasemi: Include header file for {check,restore}_astate prototypes 2020-07-15 15:17:06 +02:00
pcc-cpufreq.c cpufreq: pcc-cpufreq: Mark sometimes used ID structs as __maybe_unused 2020-07-15 15:17:06 +02:00
pmac32-cpufreq.c Merge branch 'pm-cpufreq' 2019-07-18 09:49:30 +02:00
pmac64-cpufreq.c Merge branch 'pm-cpufreq' 2019-07-18 09:49:30 +02:00
powernow-k6.c cpufreq: Convert to new X86 CPU match macros 2020-03-24 21:31:27 +01:00
powernow-k7.c cpufreq: Convert to new X86 CPU match macros 2020-03-24 21:31:27 +01:00
powernow-k7.h
powernow-k8.c cpufreq: powernow-k8: pass policy rather than use cpufreq_cpu_get() 2021-01-17 14:17:00 +01:00
powernow-k8.h
powernv-cpufreq.c cpufreq: powernv: Fix frame-size-overflow in powernv_cpufreq_reboot_notifier 2020-10-08 21:17:16 +11:00
ppc_cbe_cpufreq.c cpufreq: powerpc_cbe: Switch to QoS requests for freq limits 2019-08-26 10:02:01 +02:00
ppc_cbe_cpufreq.h cpufreq: powerpc_cbe: Switch to QoS requests for freq limits 2019-08-26 10:02:01 +02:00
ppc_cbe_cpufreq_pervasive.c
ppc_cbe_cpufreq_pmi.c cpufreq: Use per-policy frequency QoS 2019-10-21 02:05:21 +02:00
pxa2xx-cpufreq.c
pxa3xx-cpufreq.c
qcom-cpufreq-hw.c cpufreq: qcom-hw: Fix return value check in qcom_cpufreq_hw_cpu_init() 2021-03-17 17:06:33 +01:00
qcom-cpufreq-nvmem.c cpufreq: qcom: Add missing MODULE_DEVICE_TABLE 2020-12-30 11:53:38 +01:00
qoriq-cpufreq.c cpufreq: qoriq: convert to a platform driver 2020-05-07 10:47:27 +05:30
raspberrypi-cpufreq.c
s3c24xx-cpufreq-debugfs.c ARM: s3c: remove cpufreq header dependencies 2020-08-20 17:52:05 +02:00
s3c24xx-cpufreq.c cpufreq: s3c24xx: move low-level clk reg access into platform code 2020-08-20 17:53:22 +02:00
s3c64xx-cpufreq.c cpufreq: s3c64xx: Remove pointless NULL check in s3c64xx_cpufreq_driver_init 2019-10-23 08:53:23 +05:30
s3c2410-cpufreq.c cpufreq: s3c24xx: move low-level clk reg access into platform code 2020-08-20 17:53:22 +02:00
s3c2412-cpufreq.c cpufreq: s3c24xx: move low-level clk reg access into platform code 2020-08-20 17:53:22 +02:00
s3c2416-cpufreq.c cpufreq: s3c: fix unbalances of cpufreq policy refcount 2020-01-07 13:31:01 +05:30
s3c2440-cpufreq.c cpufreq: s3c24xx: move low-level clk reg access into platform code 2020-08-20 17:53:22 +02:00
s5pv210-cpufreq.c cpufreq: s5pv210: Use dev_err instead of pr_err in probe 2020-09-16 14:12:18 +05:30
sa1100-cpufreq.c cpufreq: Make cpufreq_generic_init() return void 2019-07-16 10:20:11 +02:00
sa1110-cpufreq.c Merge branch 'pm-cpufreq' 2019-07-18 09:49:30 +02:00
sc520_freq.c cpufreq: Convert to new X86 CPU match macros 2020-03-24 21:31:27 +01:00
scmi-cpufreq.c cpufreq: scmi: Fix build for !CONFIG_COMMON_CLK 2020-11-23 10:15:56 +05:30
scpi-cpufreq.c cpufreq: scpi: Add missing MODULE_ALIAS 2020-12-30 11:53:38 +01:00
sfi-cpufreq.c
sh-cpufreq.c cpufreq: Avoid creating excessively large stack frames 2020-01-27 10:33:33 +01:00
sparc-us2e-cpufreq.c
sparc-us3-cpufreq.c
spear-cpufreq.c cpufreq: Make cpufreq_generic_init() return void 2019-07-16 10:20:11 +02:00
speedstep-centrino.c cpufreq: Convert to new X86 CPU match macros 2020-03-24 21:31:27 +01:00
speedstep-ich.c cpufreq: Convert to new X86 CPU match macros 2020-03-24 21:31:27 +01:00
speedstep-lib.c cpufreq: speedstep: remove unneeded semicolon 2020-10-28 18:04:07 +01:00
speedstep-lib.h
speedstep-smi.c cpufreq: Convert to new X86 CPU match macros 2020-03-24 21:31:27 +01:00
sti-cpufreq.c cpufreq: st: Add missing MODULE_DEVICE_TABLE 2020-12-30 11:53:38 +01:00
sun50i-cpufreq-nvmem.c cpufreq: sun50i: Add missing MODULE_DEVICE_TABLE 2020-12-30 11:53:38 +01:00
tango-cpufreq.c
tegra20-cpufreq.c cpufreq: tegra20: Use generic cpufreq-dt driver (Tegra30 supported now) 2020-05-06 18:59:38 +02:00
tegra124-cpufreq.c cpufreq: tegra124: Add suspend and resume support 2019-10-29 13:25:29 +01:00
tegra186-cpufreq.c cpufreq: tegra186: Fix get frequency callback 2020-11-17 10:04:21 +05:30
tegra194-cpufreq.c cpufreq: replace cpu_logical_map() with read_cpuid_mpir() 2020-08-21 20:17:01 +02:00
ti-cpufreq.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
vexpress-spc-cpufreq.c cpufreq: vexpress-spc: Add missing MODULE_ALIAS 2020-12-30 11:53:38 +01:00