diff options
| author | Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> | 2008-02-11 17:46:31 -0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-02-14 00:09:55 -0500 |
| commit | 4fcb2fcd4d0678b8ae103d257dcb28074cbfc7fa (patch) | |
| tree | 54bcf486976184804c8fc786d09a04e1ce26ef99 /arch/x86/kernel/acpi/cstate.c | |
| parent | e760e716d47b48caf98da348368fd41b4a9b9e7e (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 'arch/x86/kernel/acpi/cstate.c')
| -rw-r--r-- | arch/x86/kernel/acpi/cstate.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/acpi/cstate.c b/arch/x86/kernel/acpi/cstate.c index 10b67170b13..8ca3557a6d5 100644 --- a/arch/x86/kernel/acpi/cstate.c +++ b/arch/x86/kernel/acpi/cstate.c @@ -126,6 +126,8 @@ int acpi_processor_ffh_cstate_probe(unsigned int cpu, printk(KERN_DEBUG "Monitor-Mwait will be used to enter C-%d " "state\n", cx->type); } + snprintf(cx->desc, ACPI_CX_DESC_LEN, "ACPI FFH INTEL MWAIT 0x%x", + cx->address); out: set_cpus_allowed(current, saved_mask); |