Commit 966916ea authored by ethan zhao's avatar ethan zhao Committed by Rafael J. Wysocki

intel_pstate: skip this driver if Sun server has _PPC method

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: default avatarEthan Zhao <ethan.zhao@oracle.com>
Tested-by: default avatarLinda Knippers <linda.knippers@hp.com>
Acked-by: default avatarKristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 493b4cd2
...@@ -1025,15 +1025,46 @@ static bool intel_pstate_no_acpi_pss(void) ...@@ -1025,15 +1025,46 @@ static bool intel_pstate_no_acpi_pss(void)
return true; 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;
}
enum {
PSS,
PPC,
};
struct hw_vendor_info { struct hw_vendor_info {
u16 valid; u16 valid;
char oem_id[ACPI_OEM_ID_SIZE]; char oem_id[ACPI_OEM_ID_SIZE];
char oem_table_id[ACPI_OEM_TABLE_ID_SIZE]; char oem_table_id[ACPI_OEM_TABLE_ID_SIZE];
int oem_pwr_table;
}; };
/* Hardware vendor-specific info that has its own power management modes */ /* Hardware vendor-specific info that has its own power management modes */
static struct hw_vendor_info vendor_info[] = { static struct hw_vendor_info vendor_info[] = {
{1, "HP ", "ProLiant"}, {1, "HP ", "ProLiant", PSS},
{1, "ORACLE", "X4-2 ", PPC},
{1, "ORACLE", "X4-2L ", PPC},
{1, "ORACLE", "X4-2B ", PPC},
{1, "ORACLE", "X3-2 ", PPC},
{1, "ORACLE", "X3-2L ", PPC},
{1, "ORACLE", "X3-2B ", PPC},
{1, "ORACLE", "X4470M2 ", PPC},
{1, "ORACLE", "X4270M3 ", PPC},
{1, "ORACLE", "X4270M2 ", PPC},
{1, "ORACLE", "X4170M2 ", PPC},
{0, "", ""}, {0, "", ""},
}; };
...@@ -1057,15 +1088,21 @@ static bool intel_pstate_platform_pwr_mgmt_exists(void) ...@@ -1057,15 +1088,21 @@ static bool intel_pstate_platform_pwr_mgmt_exists(void)
for (v_info = vendor_info; v_info->valid; v_info++) { for (v_info = vendor_info; v_info->valid; v_info++) {
if (!strncmp(hdr.oem_id, v_info->oem_id, ACPI_OEM_ID_SIZE) && if (!strncmp(hdr.oem_id, v_info->oem_id, ACPI_OEM_ID_SIZE) &&
!strncmp(hdr.oem_table_id, v_info->oem_table_id, ACPI_OEM_TABLE_ID_SIZE) && !strncmp(hdr.oem_table_id, v_info->oem_table_id,
intel_pstate_no_acpi_pss()) ACPI_OEM_TABLE_ID_SIZE))
return true; switch (v_info->oem_pwr_table) {
case PSS:
return intel_pstate_no_acpi_pss();
case PPC:
return intel_pstate_has_acpi_ppc();
}
} }
return false; return false;
} }
#else /* CONFIG_ACPI not enabled */ #else /* CONFIG_ACPI not enabled */
static inline bool intel_pstate_platform_pwr_mgmt_exists(void) { return false; } 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 */ #endif /* CONFIG_ACPI */
static int __init intel_pstate_init(void) static int __init intel_pstate_init(void)
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment