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authorVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>2008-02-11 20:46:31 -0500
committerLen Brown <len.brown@intel.com>2008-02-14 00:09:55 -0500
commit4fcb2fcd4d0678b8ae103d257dcb28074cbfc7fa (patch)
tree54bcf486976184804c8fc786d09a04e1ce26ef99 /include/acpi/processor.h
parente760e716d47b48caf98da348368fd41b4a9b9e7e (diff)
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.h9
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 @@
32#define DOMAIN_COORD_TYPE_SW_ANY 0xfd 32#define DOMAIN_COORD_TYPE_SW_ANY 0xfd
33#define DOMAIN_COORD_TYPE_HW_ALL 0xfe 33#define DOMAIN_COORD_TYPE_HW_ALL 0xfe
34 34
35#define ACPI_CSTATE_SYSTEMIO (0) 35#define ACPI_CSTATE_SYSTEMIO 0
36#define ACPI_CSTATE_FFH (1) 36#define ACPI_CSTATE_FFH 1
37#define ACPI_CSTATE_HALT (2) 37#define ACPI_CSTATE_HALT 2
38
39#define ACPI_CX_DESC_LEN 32
38 40
39/* Power Management */ 41/* Power Management */
40 42
@@ -74,6 +76,7 @@ struct acpi_processor_cx {
74 u64 time; 76 u64 time;
75 struct acpi_processor_cx_policy promotion; 77 struct acpi_processor_cx_policy promotion;
76 struct acpi_processor_cx_policy demotion; 78 struct acpi_processor_cx_policy demotion;
79 char desc[ACPI_CX_DESC_LEN];
77}; 80};
78 81
79struct acpi_processor_power { 82struct acpi_processor_power {