linux-stable.git/drivers/cpufreq, branch v5.10.7

cpufreq: intel_pstate: Use most recent guaranteed performance values

2020-12-30T10:54:10+00:00

commit e40ad84c26b4deeee46666492ec66b9a534b8e59 upstream.

When turbo has been disabled by the BIOS, but HWP_CAP.GUARANTEED is
changed later, user space may want to take advantage of this increased
guaranteed performance.

HWP_CAP.GUARANTEED is not a static value.  It can be adjusted by an
out-of-band agent or during an Intel Speed Select performance level
change.  The HWP_CAP.MAX is still the maximum achievable performance
with turbo disabled by the BIOS, so HWP_CAP.GUARANTEED can still
change as long as it remains less than or equal to HWP_CAP.MAX.

When HWP_CAP.GUARANTEED is changed, the sysfs base_frequency
attribute shows the most recent guaranteed frequency value. This
attribute can be used by user space software to update the scaling
min/max limits of the CPU.

Currently, the ->setpolicy() callback already uses the latest
HWP_CAP values when setting HWP_REQ, but the ->verify() callback will
restrict the user settings to the to old guaranteed performance value
which prevents user space from making use of the extra CPU capacity
theoretically available to it after increasing HWP_CAP.GUARANTEED.

To address this, read HWP_CAP in intel_pstate_verify_cpu_policy()
to obtain the maximum P-state that can be used and use that to
confine the policy max limit instead of using the cached and
possibly stale pstate.max_freq value for this purpose.

For consistency, update intel_pstate_update_perf_limits() to use the
maximum available P-state returned by intel_pstate_get_hwp_max() to
compute the maximum frequency instead of using the return value of
intel_pstate_get_max_freq() which, again, may be stale.

This issue is a side-effect of fixing the scaling frequency limits in
commit eacc9c5a927e ("cpufreq: intel_pstate: Fix intel_pstate_get_hwp_max()
for turbo disabled") which corrected the setting of the reduced scaling
frequency values, but caused stale HWP_CAP.GUARANTEED to be used in
the case at hand.

Fixes: eacc9c5a927e ("cpufreq: intel_pstate: Fix intel_pstate_get_hwp_max() for turbo disabled")
Reported-by: Srinivas Pandruvada 
Tested-by: Srinivas Pandruvada 
Cc: 5.8+  # 5.8+
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Greg Kroah-Hartman

cpufreq: imx: fix NVMEM_IMX_OCOTP dependency

2020-12-30T10:53:39+00:00

[ Upstream commit fc928b901dc68481ba3e524860a641fe13e25dfe ]

A driver should not 'select' drivers from another subsystem.
If NVMEM is disabled, this one results in a warning:

WARNING: unmet direct dependencies detected for NVMEM_IMX_OCOTP
  Depends on [n]: NVMEM [=n] && (ARCH_MXC [=y] || COMPILE_TEST [=y]) && HAS_IOMEM [=y]
  Selected by [y]:
  - ARM_IMX6Q_CPUFREQ [=y] && CPU_FREQ [=y] && (ARM || ARM64 [=y]) && ARCH_MXC [=y] && REGULATOR_ANATOP [=y]

Change the 'select' to 'depends on' to prevent it from going wrong,
and allow compile-testing without that driver, since it is only
a runtime dependency.

Fixes: 2782ef34ed23 ("cpufreq: imx: Select NVMEM_IMX_OCOTP")
Signed-off-by: Arnd Bergmann 
Signed-off-by: Viresh Kumar 
Signed-off-by: Sasha Levin

cpufreq: vexpress-spc: Add missing MODULE_ALIAS

2020-12-30T10:53:38+00:00

[ Upstream commit d15183991c2d53d7cecf27a1555c91b702cef1ea ]

This patch adds missing MODULE_ALIAS for automatic loading of this cpufreq
driver when it is compiled as an external module.

Signed-off-by: Pali Rohár 
Fixes: 47ac9aa165540 ("cpufreq: arm_big_little: add vexpress SPC interface driver")
Signed-off-by: Viresh Kumar 
Signed-off-by: Sasha Levin

cpufreq: scpi: Add missing MODULE_ALIAS

2020-12-30T10:53:38+00:00

[ Upstream commit c0382d049d2def37b81e907a8b22661a4a4a6eb5 ]

This patch adds missing MODULE_ALIAS for automatic loading of this cpufreq
driver when it is compiled as an external module.

Signed-off-by: Pali Rohár 
Fixes: 8def31034d033 ("cpufreq: arm_big_little: add SCPI interface driver")
Signed-off-by: Viresh Kumar 
Signed-off-by: Sasha Levin

cpufreq: loongson1: Add missing MODULE_ALIAS

2020-12-30T10:53:38+00:00

[ Upstream commit b9acab091842ca8b288882798bb809f7abf5408a ]

This patch adds missing MODULE_ALIAS for automatic loading of this cpufreq
driver when it is compiled as an external module.

Signed-off-by: Pali Rohár 
Fixes: a0a22cf14472f ("cpufreq: Loongson1: Add cpufreq driver for Loongson1B")
Signed-off-by: Viresh Kumar 
Signed-off-by: Sasha Levin

cpufreq: sun50i: Add missing MODULE_DEVICE_TABLE

2020-12-30T10:53:38+00:00

[ Upstream commit af2096f285077e3339eb835ad06c50bdd59f01b5 ]

This patch adds missing MODULE_DEVICE_TABLE definition which generates
correct modalias for automatic loading of this cpufreq driver when it is
compiled as an external module.

Signed-off-by: Pali Rohár 
Fixes: f328584f7bff8 ("cpufreq: Add sun50i nvmem based CPU scaling driver")
Reviewed-by: Yangtao Li 
Signed-off-by: Viresh Kumar 
Signed-off-by: Sasha Levin

cpufreq: st: Add missing MODULE_DEVICE_TABLE

2020-12-30T10:53:38+00:00

[ Upstream commit 183747ab52654eb406fc6b5bfb40806b75d31811 ]

This patch adds missing MODULE_DEVICE_TABLE definition which generates
correct modalias for automatic loading of this cpufreq driver when it is
compiled as an external module.

Signed-off-by: Pali Rohár 
Fixes: ab0ea257fc58d ("cpufreq: st: Provide runtime initialised driver for ST's platforms")
Signed-off-by: Viresh Kumar 
Signed-off-by: Sasha Levin

cpufreq: qcom: Add missing MODULE_DEVICE_TABLE

2020-12-30T10:53:38+00:00

[ Upstream commit a5a6031663bc1dd0a10babd49d1bcb3153a8327f ]

This patch adds missing MODULE_DEVICE_TABLE definition which generates
correct modalias for automatic loading of this cpufreq driver when it is
compiled as an external module.

Signed-off-by: Pali Rohár 
Fixes: 46e2856b8e188 ("cpufreq: Add Kryo CPU scaling driver")
Signed-off-by: Viresh Kumar 
Signed-off-by: Sasha Levin

cpufreq: mediatek: Add missing MODULE_DEVICE_TABLE

2020-12-30T10:53:38+00:00

[ Upstream commit af6eca06501118af3e2ad46eee8edab20624b74e ]

This patch adds missing MODULE_DEVICE_TABLE definition which generates
correct modalias for automatic loading of this cpufreq driver when it is
compiled as an external module.

Signed-off-by: Pali Rohár 
Fixes: 501c574f4e3a5 ("cpufreq: mediatek: Add support of cpufreq to MT2701/MT7623 SoC")
Signed-off-by: Viresh Kumar 
Signed-off-by: Sasha Levin

cpufreq: highbank: Add missing MODULE_DEVICE_TABLE

2020-12-30T10:53:38+00:00

[ Upstream commit 9433777a6e0aae27468d3434b75cd51bb88ff711 ]

This patch adds missing MODULE_DEVICE_TABLE definition which generates
correct modalias for automatic loading of this cpufreq driver when it is
compiled as an external module.

Signed-off-by: Pali Rohár 
Fixes: 6754f556103be ("cpufreq / highbank: add support for highbank cpufreq")
Signed-off-by: Viresh Kumar 
Signed-off-by: Sasha Levin