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| author | Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> | 2008-02-12 02:46:31 +0100 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-02-14 06:09:55 +0100 |
| commit | 4fcb2fcd4d0678b8ae103d257dcb28074cbfc7fa (patch) | |
| tree | 54bcf486976184804c8fc786d09a04e1ce26ef99 /include/acpi/processor.h | |
| parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6 (diff) | |
| download | linux-4fcb2fcd4d0678b8ae103d257dcb28074cbfc7fa.tar.xz linux-4fcb2fcd4d0678b8ae103d257dcb28074cbfc7fa.zip | |
ACPI, cpuidle: Clarify C-state description in sysfs
Add a new sysfs entry under cpuidle states. desc - can be used by driver to
communicate to userspace any specific information about the state.
This helps in identifying the exact hardware C-states behind the ACPI C-state
definition.
Idea is to export this through powertop, which will help to map the C-state
reported by powertop to actual hardware C-state.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'include/acpi/processor.h')
| -rw-r--r-- | include/acpi/processor.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/include/acpi/processor.h b/include/acpi/processor.h index cdc8004cfd12..06480bcabfdc 100644 --- a/include/acpi/processor.h +++ b/include/acpi/processor.h @@ -32,9 +32,11 @@ #define DOMAIN_COORD_TYPE_SW_ANY 0xfd #define DOMAIN_COORD_TYPE_HW_ALL 0xfe -#define ACPI_CSTATE_SYSTEMIO (0) -#define ACPI_CSTATE_FFH (1) -#define ACPI_CSTATE_HALT (2) +#define ACPI_CSTATE_SYSTEMIO 0 +#define ACPI_CSTATE_FFH 1 +#define ACPI_CSTATE_HALT 2 + +#define ACPI_CX_DESC_LEN 32 /* Power Management */ @@ -74,6 +76,7 @@ struct acpi_processor_cx { u64 time; struct acpi_processor_cx_policy promotion; struct acpi_processor_cx_policy demotion; + char desc[ACPI_CX_DESC_LEN]; }; struct acpi_processor_power { |