Rafael J. Wysocki a1ff59784b cpufreq: intel_pstate: Use HWP to initialize ITMT if CPPC is missing ... It is reported that single-thread performance on some hybrid systems dropped significantly after commit 7feec7430e ("ACPI: CPPC: Only probe for _CPC if CPPC v2 is acked") which prevented _CPC from being used if the support for it had not been confirmed by the platform firmware. The problem is that if the platform firmware does not confirm CPPC v2 support, cppc_get_perf_caps() returns an error which prevents the intel_pstate driver from enabling ITMT. Consequently, the scheduler does not get any hints on CPU performance differences, so in a hybrid system some tasks may run on CPUs with lower capacity even though they should be running on high-capacity CPUs. To address this, modify intel_pstate to use the information from MSR_HWP_CAPABILITIES to enable ITMT if CPPC is not available (which is done already if the highest performance number coming from CPPC is not realistic). Fixes: 7feec7430e ("ACPI: CPPC: Only probe for _CPC if CPPC v2 is acked") Closes: https://lore.kernel.org/linux-acpi/d01b0a1f-bd33-47fe-ab41-43843d8a374f@kfocus.org Link: https://lore.kernel.org/linux-acpi/ZnD22b3Br1ng7alf@kf-XE Reported-by: Aaron Rainbolt <arainbolt@kfocus.org> Tested-by: Aaron Rainbolt <arainbolt@kfocus.org> Cc: 5.19+ <stable@vger.kernel.org> # 5.19+ Link: https://patch.msgid.link/12460110.O9o76ZdvQC@rjwysocki.net Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>		2024-06-24 20:55:11 +02:00
..
acpi-cpufreq.c	cpufreq: acpi: Convert to platform remove callback returning void	2023-07-20 16:02:13 +05:30
amd-pstate-trace.c
amd-pstate-trace.h
amd-pstate-ut.c	cpufreq: amd-pstate: remove global header file	2024-05-28 21:59:39 +02:00
amd-pstate.c	cpufreq: amd-pstate: Fix the inconsistency in max frequency units	2024-05-28 22:03:11 +02:00
amd-pstate.h	cpufreq: amd-pstate: remove global header file	2024-05-28 21:59:39 +02:00
amd_freq_sensitivity.c	cpufreq: amd_freq_sensitivity: Add missing pci_dev_put()	2022-11-30 19:50:04 +01:00
apple-soc-cpufreq.c	cpufreq: apple-soc: Fix an IS_ERR() vs NULL check	2023-03-01 19:34:54 +01:00
armada-8k-cpufreq.c	cpufreq: armada-8k: Fix parameter type warning	2023-12-18 11:22:57 +05:30
armada-37xx-cpufreq.c	cpufreq: Explicitly include correct DT includes	2023-07-20 16:01:57 +05:30
bmips-cpufreq.c
brcmstb-avs-cpufreq.c	cpufreq: brcmstb-avs-cpufreq: ISO C90 forbids mixed declarations	2024-04-25 10:36:40 +05:30
cppc_cpufreq.c	cppc_cpufreq: Fix possible null pointer dereference	2024-04-19 11:59:16 +05:30
cpufreq-dt-platdev.c	cpufreq: dt-platdev: eliminate uses of of_node_put()	2024-04-23 14:59:56 +05:30
cpufreq-dt.c	cpufreq: dt: eliminate uses of of_node_put()	2024-04-23 14:59:56 +05:30
cpufreq-dt.h
cpufreq-nforce2.c
cpufreq.c	Power management updates for 6.10-rc1	2024-05-14 13:19:15 -07:00
cpufreq_conservative.c	cpufreq: conservative: Simplify the condition of storing 'down_threshold'	2023-10-06 21:55:13 +02:00
cpufreq_governor.c	cpufreq: governor: Free dbs_data directly when gov->init() fails	2023-08-29 20:21:35 +02:00
cpufreq_governor.h
cpufreq_governor_attr_set.c
cpufreq_ondemand.c	cpufreq: Remove references to 10ms min sampling rate	2024-02-24 15:02:33 +01:00
cpufreq_ondemand.h
cpufreq_performance.c
cpufreq_powersave.c
cpufreq_stats.c	cpufreq: stats: Fix buffer overflow detection in trans_stats()	2023-10-24 22:02:06 +02:00
cpufreq_userspace.c	cpufreq: userspace: Move is_managed indicator into per-policy structure	2023-10-06 22:01:26 +02:00
davinci-cpufreq.c	cpufreq: davinci: Convert to platform remove callback returning void	2023-07-20 16:02:13 +05:30
e_powersaver.c
elanfreq.c
freq_table.c	cpufreq: Fix up printing large CPU numbers and frequency values	2024-04-30 12:55:01 +02:00
gx-suspmod.c
highbank-cpufreq.c
imx-cpufreq-dt.c	cpufreq: imx-cpufreq-dt: Convert to platform remove callback returning void	2023-07-20 16:02:13 +05:30
imx6q-cpufreq.c	cpufreq: imx6: use regmap to read ocotp register	2024-01-23 11:36:21 +05:30
intel_pstate.c	cpufreq: intel_pstate: Use HWP to initialize ITMT if CPPC is missing	2024-06-24 20:55:11 +02:00
Kconfig	cpufreq: Move CPPC configs to common Kconfig and add RISC-V	2024-03-19 18:30:55 -07:00
Kconfig.arm	RISC-V Patches for the 6.9 Merge Window	2024-03-22 10:41:13 -07:00
Kconfig.powerpc
Kconfig.x86	cpufreq: amd-pstate: Add a kernel config option to set default mode	2023-06-21 18:44:56 +02:00
kirkwood-cpufreq.c	cpufreq: kirkwood: Convert to platform remove callback returning void	2023-07-20 16:02:13 +05:30
longhaul.c	cpufreq: longhaul: Make array speeds static const	2022-11-03 19:13:34 +01:00
longhaul.h
longrun.c
loongson2_cpufreq.c
Makefile	arch: Remove Itanium (IA-64) architecture	2023-09-11 08:13:17 +00:00
maple-cpufreq.c	cpufreq: Adjust includes to remove of_device.h	2023-04-13 17:46:35 -05:00
mediatek-cpufreq-hw.c	cpufreq: mediatek-hw: Don't error out if supply is not found	2024-01-29 10:34:17 +05:30
mediatek-cpufreq.c	cpufreq: mediatek: Add support for MT7988A	2024-04-23 11:43:39 +05:30
mvebu-cpufreq.c
omap-cpufreq.c	cpufreq: omap: Convert to platform remove callback returning void	2023-07-20 16:02:14 +05:30
p4-clockmod.c
pasemi-cpufreq.c
pcc-cpufreq.c	cpufreq: pcc: Fix the potentinal scheduling delays in target_index()	2023-08-29 20:41:29 +02:00
pmac32-cpufreq.c	powerpc: rename SPRN_HID2 define to SPRN_HID2_750FX	2024-05-08 00:25:00 +10:00
pmac64-cpufreq.c	cpufreq: Adjust includes to remove of_device.h	2023-04-13 17:46:35 -05:00
powernow-k6.c
powernow-k7.c
powernow-k7.h
powernow-k8.c	cpufreq: powernow-k8: Use related_cpus instead of cpus in driver.exit()	2023-08-28 12:27:30 +05:30
powernow-k8.h
powernv-cpufreq.c
ppc_cbe_cpufreq.c	cpufreq: Explicitly include correct DT includes	2023-07-20 16:01:57 +05:30
ppc_cbe_cpufreq.h
ppc_cbe_cpufreq_pervasive.c
ppc_cbe_cpufreq_pmi.c	cpufreq: Explicitly include correct DT includes	2023-07-20 16:01:57 +05:30
pxa2xx-cpufreq.c
pxa3xx-cpufreq.c
qcom-cpufreq-hw.c	sched/cpufreq: Rename arch_update_thermal_pressure() => arch_update_hw_pressure()	2024-04-24 12:08:01 +02:00
qcom-cpufreq-nvmem.c	cpufreq: qcom-nvmem: Preserve PM domain votes in system suspend	2023-11-23 13:08:01 +05:30
qoriq-cpufreq.c	cpufreq: qoriq: Convert to platform remove callback returning void	2023-07-20 16:02:13 +05:30
raspberrypi-cpufreq.c	cpufreq: raspberrypi: Convert to platform remove callback returning void	2023-07-20 16:02:13 +05:30
s3c64xx-cpufreq.c
s5pv210-cpufreq.c
sa1110-cpufreq.c	ARM: sa1100: remove unused board files	2023-01-12 10:53:12 +01:00
sc520_freq.c
scmi-cpufreq.c	cpufreq: scmi: Enable boost support	2024-03-15 11:19:27 +05:30
scpi-cpufreq.c	cpufreq: scpi: Convert to platform remove callback returning void	2023-07-20 16:02:12 +05:30
sh-cpufreq.c
sparc-us2e-cpufreq.c	cpufreq: sparc: Don't mark cpufreq callbacks with __init	2023-07-12 12:45:18 +02:00
sparc-us3-cpufreq.c	cpufreq: sparc: Don't mark cpufreq callbacks with __init	2023-07-12 12:45:18 +02:00
spear-cpufreq.c	cpufreq: Adjust includes to remove of_device.h	2023-04-13 17:46:35 -05:00
speedstep-centrino.c
speedstep-ich.c
speedstep-lib.c
speedstep-lib.h
speedstep-smi.c
sti-cpufreq.c	cpufreq: Explicitly include correct DT includes	2023-07-20 16:01:57 +05:30
sun50i-cpufreq-nvmem.c	cpufreq: sun50i: fix error returns in dt_has_supported_hw()	2024-04-25 10:38:06 +05:30
tegra20-cpufreq.c	Devicetree updates for v6.4, part 2:	2023-04-27 10:09:05 -07:00
tegra124-cpufreq.c	cpupfreq: tegra124: eliminate uses of of_node_put()	2024-04-19 11:55:44 +05:30
tegra186-cpufreq.c	cpufreq: tegra186: Convert to platform remove callback returning void	2023-07-20 16:02:13 +05:30
tegra194-cpufreq.c	cpufreq: tegra194: remove redundant AND with cpu_online_mask	2023-10-10 11:06:03 +05:30
ti-cpufreq.c	cpufreq: ti: Implement scope-based cleanup in ti_cpufreq_match_node()	2024-04-23 12:51:46 +05:30
vexpress-spc-cpufreq.c	cpufreq: vexpress: Convert to platform remove callback returning void	2023-07-20 16:02:12 +05:30