diff options
Diffstat (limited to 'usr/src/uts/i86pc/os/cpupm/pwrnow.c')
| -rw-r--r-- | usr/src/uts/i86pc/os/cpupm/pwrnow.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/usr/src/uts/i86pc/os/cpupm/pwrnow.c b/usr/src/uts/i86pc/os/cpupm/pwrnow.c index d403c69e34..0116fe9157 100644 --- a/usr/src/uts/i86pc/os/cpupm/pwrnow.c +++ b/usr/src/uts/i86pc/os/cpupm/pwrnow.c @@ -38,6 +38,8 @@ static void pwrnow_fini(cpu_t *); static void pwrnow_power(cpuset_t, uint32_t); static void pwrnow_stop(cpu_t *); +static boolean_t pwrnow_cpb_supported(void); + /* * Interfaces for modules implementing AMD's PowerNow!. */ @@ -67,6 +69,7 @@ cpupm_state_ops_t pwrnow_ops = { #define AMD_CPUID_PSTATE_HARDWARE (1<<7) #define AMD_CPUID_TSC_CONSTANT (1<<8) +#define AMD_CPUID_CPB (1<<9) /* * Debugging support @@ -128,6 +131,10 @@ pwrnow_pstate_transition(uint32_t req_state) ctrl = CPU_ACPI_PSTATE_CTRL(req_pstate); write_ctrl(handle, ctrl); + if (mach_state->ms_turbo != NULL) + cpupm_record_turbo_info(mach_state->ms_turbo, + mach_state->ms_pstate.cma_state.pstate, req_state); + mach_state->ms_pstate.cma_state.pstate = req_state; cpu_set_curr_clock((uint64_t)CPU_ACPI_FREQ(req_pstate) * 1000000); } @@ -192,6 +199,12 @@ pwrnow_init(cpu_t *cp) cpupm_alloc_domains(cp, CPUPM_P_STATES); + /* + * Check for Core Performance Boost support + */ + if (pwrnow_cpb_supported()) + mach_state->ms_turbo = cpupm_turbo_init(cp); + PWRNOW_DEBUG(("Processor %d succeeded.\n", cp->cpu_id)) return (PWRNOW_RET_SUCCESS); } @@ -208,6 +221,10 @@ pwrnow_fini(cpu_t *cp) cpupm_free_domains(&cpupm_pstate_domains); cpu_acpi_free_pstate_data(handle); + + if (mach_state->ms_turbo != NULL) + cpupm_turbo_fini(mach_state->ms_turbo); + mach_state->ms_turbo = NULL; } boolean_t @@ -249,6 +266,30 @@ pwrnow_supported() return (B_TRUE); } +static boolean_t +pwrnow_cpb_supported(void) +{ + struct cpuid_regs cpu_regs; + + /* Required features */ + if (!is_x86_feature(x86_featureset, X86FSET_CPUID) || + !is_x86_feature(x86_featureset, X86FSET_MSR)) { + PWRNOW_DEBUG(("No CPUID or MSR support.")); + return (B_FALSE); + } + + /* + * Get the Advanced Power Management Information. + */ + cpu_regs.cp_eax = 0x80000007; + (void) __cpuid_insn(&cpu_regs); + + if (!(cpu_regs.cp_edx & AMD_CPUID_CPB)) + return (B_FALSE); + + return (B_TRUE); +} + static void pwrnow_stop(cpu_t *cp) { @@ -258,4 +299,8 @@ pwrnow_stop(cpu_t *cp) cpupm_remove_domains(cp, CPUPM_P_STATES, &cpupm_pstate_domains); cpu_acpi_free_pstate_data(handle); + + if (mach_state->ms_turbo != NULL) + cpupm_turbo_fini(mach_state->ms_turbo); + mach_state->ms_turbo = NULL; } |