Sukumar Ghorai ed1c03a138 soc/intel: separate slp-s0 residency counter frequency in LPIT table ... Intel platforms use Low Power Idle Table (LPIT) to enumerate platform Low Power Idle states. There are two types of low power residencies a) CPU PKG C10 - read via MSR (Function fixed hardware interface) b) Platform Controller Hub (PCH) SLP_S0 - read via memory mapped IO Ref. https://www.uefi.org/sites/default/files/resources/Intel_ACPI_Low_Power_S0_Idle.pdf, section 2.2.1: value of 0 indicates that counter runs at TSC frequency. Ref. Intel 64 and IA-32 Architectures Software Developer’s Manual (Vol 4) MSR 0x632: PC10 residency counter is at same frequency as the TSC. Whereas slp_s0 residency counter running in different frequency. BUG=b:300440936 TEST=check kernel cpuidle sysfs are created after kernel boot cat /sys/devices/system/cpu/cpuidle/low_power_idle_cpu_residency_us cat /sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us Change-Id: Ibde764551a21b9aecb1c269948f4823548294711 Signed-off-by: Sukumar Ghorai <sukumar.ghorai@intel.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/78177 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kapil Porwal <kapilporwal@google.com> Reviewed-by: Subrata Banik <subratabanik@google.com>		2023-10-05 15:22:04 +00:00
..
alderlake	soc/intel: Select GMA v2 for ADL, MTL, TGL to reflect port/pipe defs	2023-10-04 18:50:32 +00:00
apollolake	soc/intel/apollolake: Correct the logic for the legacy 8254 timer	2023-08-25 14:38:31 +00:00
baytrail	soc/intel: Remove space between function name and '('	2023-09-11 21:39:08 +00:00
braswell	soc: Remove SOC_SPECIFIC_OPTIONS	2023-08-21 23:45:43 +00:00
broadwell	soc/intel: Remove space between function name and '('	2023-09-11 21:39:08 +00:00
cannonlake	soc/intel: Move USB wake methods to a common ASL file	2023-10-04 15:29:32 +00:00
common	soc/intel: separate slp-s0 residency counter frequency in LPIT table	2023-10-05 15:22:04 +00:00
denverton_ns	soc/intel/denverton_ns: Remove __attribute__(())	2023-09-17 13:31:59 +00:00
elkhartlake	soc: Remove SOC_SPECIFIC_OPTIONS	2023-08-21 23:45:43 +00:00
jasperlake	soc/intel/jasperlake: Enable wake from USB	2023-10-04 15:29:57 +00:00
meteorlake	soc/intel: Select GMA v2 for ADL, MTL, TGL to reflect port/pipe defs	2023-10-04 18:50:32 +00:00
skylake	soc/intel: Move USB wake methods to a common ASL file	2023-10-04 15:29:32 +00:00
tigerlake	soc/intel: Select GMA v2 for ADL, MTL, TGL to reflect port/pipe defs	2023-10-04 18:50:32 +00:00
xeon_sp	soc/intel/xeon_sp: Add HDA disable support	2023-09-25 16:37:39 +00:00
Makefile.inc	soc/intel/Makefile.inc: Add comment where CONFIG_CSE_*_FILE are used	2023-09-22 15:48:08 +00:00