| Message ID | 1416299826-15813-6-git-send-email-ethan.zhao@oracle.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
On 11/18/2014 12:37 AM, Ethan Zhao wrote: > Oracle Sun X86 servers have dynamic power capping capability that works via > ACPI _PPC method etc, so skip loading this driver if Sun server has ACPI _PPC > enabled. > > Signed-off-by: Ethan Zhao <ethan.zhao@oracle.com> > --- > drivers/cpufreq/intel_pstate.c | 20 ++++++++++++++++++++ > 1 file changed, 20 insertions(+) > > diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c > index 27bb6d3..5498eb0 100644 > --- a/drivers/cpufreq/intel_pstate.c > +++ b/drivers/cpufreq/intel_pstate.c > @@ -943,6 +943,21 @@ static bool intel_pstate_no_acpi_pss(void) > return true; > } > > +static bool intel_pstate_has_acpi_ppc(void) > +{ > + int i; > + > + for_each_possible_cpu(i) { > + struct acpi_processor *pr = per_cpu(processors, i); > + > + if (!pr) > + continue; > + if (acpi_has_method(pr->handle, "_PPC")) > + return true; > + } > + return false; > +} > + > struct hw_vendor_info { > u16 valid; > char oem_id[ACPI_OEM_ID_SIZE]; > @@ -952,6 +967,7 @@ struct hw_vendor_info { > /* Hardware vendor-specific info that has its own power management modes */ > static struct hw_vendor_info vendor_info[] = { > {1, "HP ", "ProLiant"}, > + {1, "ORACLE", ""}, > {0, "", ""}, > }; > Does this apply to ALL oracle systems? Is the presence or absense of the _PPC method configurable in the oracle BIOS? > @@ -969,12 +985,16 @@ static bool intel_pstate_platform_pwr_mgmt_exists(void) > !strncmp(hdr.oem_table_id, v_info->oem_table_id, ACPI_OEM_TABLE_ID_SIZE) && > intel_pstate_no_acpi_pss()) > return true; > + if (!strncmp(hdr.oem_id, v_info->oem_id, ACPI_OEM_ID_SIZE) && > + intel_pstate_has_acpi_ppc()) > + return true; > } > > return false; > } > #else /* CONFIG_ACPI not enabled */ > static inline bool intel_pstate_platform_pwr_mgmt_exists(void) { return false; } > +static inline bool intel_pstate_has_acpi_ppc(void) { return false; } > #endif /* CONFIG_ACPI */ > > static int __init intel_pstate_init(void) > -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Dirk, > ? 2014?11?19??22:59?Dirk Brandewie <dirk.brandewie@gmail.com> ??? > >> On 11/18/2014 12:37 AM, Ethan Zhao wrote: >> Oracle Sun X86 servers have dynamic power capping capability that works via >> ACPI _PPC method etc, so skip loading this driver if Sun server has ACPI _PPC >> enabled. >> >> Signed-off-by: Ethan Zhao <ethan.zhao@oracle.com> >> --- >> drivers/cpufreq/intel_pstate.c | 20 ++++++++++++++++++++ >> 1 file changed, 20 insertions(+) >> >> diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c >> index 27bb6d3..5498eb0 100644 >> --- a/drivers/cpufreq/intel_pstate.c >> +++ b/drivers/cpufreq/intel_pstate.c >> @@ -943,6 +943,21 @@ static bool intel_pstate_no_acpi_pss(void) >> return true; >> } >> >> +static bool intel_pstate_has_acpi_ppc(void) >> +{ >> + int i; >> + >> + for_each_possible_cpu(i) { >> + struct acpi_processor *pr = per_cpu(processors, i); >> + >> + if (!pr) >> + continue; >> + if (acpi_has_method(pr->handle, "_PPC")) >> + return true; >> + } >> + return false; >> +} >> + >> struct hw_vendor_info { >> u16 valid; >> char oem_id[ACPI_OEM_ID_SIZE]; >> @@ -952,6 +967,7 @@ struct hw_vendor_info { >> /* Hardware vendor-specific info that has its own power management modes */ >> static struct hw_vendor_info vendor_info[] = { >> {1, "HP ", "ProLiant"}, >> + {1, "ORACLE", ""}, >> {0, "", ""}, >> }; > > Does this apply to ALL oracle systems? Yes, as I know, all recent oracle x86 servers have power capping functions. > > Is the presence or absense of the _PPC method configurable in the oracle BIOS? There is no option in BIOS to enable or disable _PPC. But they configure power limit Functions via SP(service processors). Thanks, Ethan > >> @@ -969,12 +985,16 @@ static bool intel_pstate_platform_pwr_mgmt_exists(void) >> !strncmp(hdr.oem_table_id, v_info->oem_table_id, ACPI_OEM_TABLE_ID_SIZE) && >> intel_pstate_no_acpi_pss()) >> return true; >> + if (!strncmp(hdr.oem_id, v_info->oem_id, ACPI_OEM_ID_SIZE) && >> + intel_pstate_has_acpi_ppc()) >> + return true; >> } >> >> return false; >> } >> #else /* CONFIG_ACPI not enabled */ >> static inline bool intel_pstate_platform_pwr_mgmt_exists(void) { return false; } >> +static inline bool intel_pstate_has_acpi_ppc(void) { return false; } >> #endif /* CONFIG_ACPI */ >> >> static int __init intel_pstate_init(void) > -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 27bb6d3..5498eb0 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -943,6 +943,21 @@ static bool intel_pstate_no_acpi_pss(void) return true; } +static bool intel_pstate_has_acpi_ppc(void) +{ + int i; + + for_each_possible_cpu(i) { + struct acpi_processor *pr = per_cpu(processors, i); + + if (!pr) + continue; + if (acpi_has_method(pr->handle, "_PPC")) + return true; + } + return false; +} + struct hw_vendor_info { u16 valid; char oem_id[ACPI_OEM_ID_SIZE]; @@ -952,6 +967,7 @@ struct hw_vendor_info { /* Hardware vendor-specific info that has its own power management modes */ static struct hw_vendor_info vendor_info[] = { {1, "HP ", "ProLiant"}, + {1, "ORACLE", ""}, {0, "", ""}, }; @@ -969,12 +985,16 @@ static bool intel_pstate_platform_pwr_mgmt_exists(void) !strncmp(hdr.oem_table_id, v_info->oem_table_id, ACPI_OEM_TABLE_ID_SIZE) && intel_pstate_no_acpi_pss()) return true; + if (!strncmp(hdr.oem_id, v_info->oem_id, ACPI_OEM_ID_SIZE) && + intel_pstate_has_acpi_ppc()) + return true; } return false; } #else /* CONFIG_ACPI not enabled */ static inline bool intel_pstate_platform_pwr_mgmt_exists(void) { return false; } +static inline bool intel_pstate_has_acpi_ppc(void) { return false; } #endif /* CONFIG_ACPI */ static int __init intel_pstate_init(void)
Oracle Sun X86 servers have dynamic power capping capability that works via ACPI _PPC method etc, so skip loading this driver if Sun server has ACPI _PPC enabled. Signed-off-by: Ethan Zhao <ethan.zhao@oracle.com> --- drivers/cpufreq/intel_pstate.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)