http://defect.opensolaris.org/bz/show_bug.cgi?id=4128
Summary: cpupm_enabled does not have CPUPM_C_STATES bit set
Classification: Development
Product: power-mgmt
Version: unspecified
Platform: Other
OS/Version: Solaris
Status: NEW
Severity: minor
Priority: P3
Component: c-state
AssignedTo: bill.holler at sun.com
ReportedBy: bill.holler at sun.com
CC: tesla-dev at opensolaris.org
Estimated Hours: 0.0
A NHM system with latest pad-gate tip 7490 does not have the CPUPM_C_STATES
bit set in cpupm_enabled:
> cpupm_enabled ::print
0x3
i86pc/os/cpupm.c does not initialize this bit:
static uint32_t cpupm_enabled = CPUPM_P_STATES | CPUPM_T_STATES;
It looks like cpudrv_pm_cstate_ready() will fail which will cause the
cpudrv_pm_manage_cstates() change notification handler to return early
without rebuilding new C-State domain info?
I believe the fix is to initialize cpupm_enabled to CPUPM_ALL_STATES:
- static uint32_t cpupm_enabled = CPUPM_P_STATES | CPUPM_T_STATES;
+ static uint32_t cpupm_enabled = CPUPM_ALL_STATES;
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