* - Added _PDC for platforms with Intel CPUs
*/
#include <linux/dmi.h>
+#include <linux/slab.h>
#include <acpi/acpi_drivers.h>
#include <acpi/processor.h>
};
#ifdef CONFIG_SMP
-static struct acpi_table_madt *madt;
-
static int map_lapic_id(struct acpi_subtable_header *entry,
u32 acpi_id, int *apic_id)
{
struct acpi_madt_local_apic *lapic =
(struct acpi_madt_local_apic *)entry;
- if ((lapic->lapic_flags & ACPI_MADT_ENABLED) &&
- lapic->processor_id == acpi_id) {
- *apic_id = lapic->id;
- return 1;
- }
- return 0;
+
+ if (!(lapic->lapic_flags & ACPI_MADT_ENABLED))
+ return 0;
+
+ if (lapic->processor_id != acpi_id)
+ return 0;
+
+ *apic_id = lapic->id;
+ return 1;
}
static int map_x2apic_id(struct acpi_subtable_header *entry,
{
struct acpi_madt_local_x2apic *apic =
(struct acpi_madt_local_x2apic *)entry;
- u32 tmp = apic->local_apic_id;
- /* Only check enabled APICs*/
if (!(apic->lapic_flags & ACPI_MADT_ENABLED))
return 0;
- /* Device statement declaration type */
- if (device_declaration) {
- if (apic->uid == acpi_id)
- goto found;
+ if (device_declaration && (apic->uid == acpi_id)) {
+ *apic_id = apic->local_apic_id;
+ return 1;
}
return 0;
-found:
- *apic_id = tmp;
- return 1;
}
static int map_lsapic_id(struct acpi_subtable_header *entry,
{
struct acpi_madt_local_sapic *lsapic =
(struct acpi_madt_local_sapic *)entry;
- u32 tmp = (lsapic->id << 8) | lsapic->eid;
- /* Only check enabled APICs*/
if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))
return 0;
- /* Device statement declaration type */
if (device_declaration) {
- if (entry->length < 16)
- printk(KERN_ERR PREFIX
- "Invalid LSAPIC with Device type processor (SAPIC ID %#x)\n",
- tmp);
- else if (lsapic->uid == acpi_id)
- goto found;
- /* Processor statement declaration type */
- } else if (lsapic->processor_id == acpi_id)
- goto found;
+ if ((entry->length < 16) || (lsapic->uid != acpi_id))
+ return 0;
+ } else if (lsapic->processor_id != acpi_id)
+ return 0;
- return 0;
-found:
- *apic_id = tmp;
+ *apic_id = (lsapic->id << 8) | lsapic->eid;
return 1;
}
static int map_madt_entry(int type, u32 acpi_id)
{
unsigned long madt_end, entry;
+ static struct acpi_table_madt *madt;
+ static int read_madt;
int apic_id = -1;
+ if (!read_madt) {
+ if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
+ (struct acpi_table_header **)&madt)))
+ madt = NULL;
+ read_madt++;
+ }
+
if (!madt)
return apic_id;
EXPORT_SYMBOL_GPL(acpi_get_cpuid);
#endif
+static bool processor_physically_present(acpi_handle handle)
+{
+ int cpuid, type;
+ u32 acpi_id;
+ acpi_status status;
+ acpi_object_type acpi_type;
+ unsigned long long tmp;
+ union acpi_object object = { 0 };
+ struct acpi_buffer buffer = { sizeof(union acpi_object), &object };
+
+ status = acpi_get_type(handle, &acpi_type);
+ if (ACPI_FAILURE(status))
+ return false;
+
+ switch (acpi_type) {
+ case ACPI_TYPE_PROCESSOR:
+ status = acpi_evaluate_object(handle, NULL, NULL, &buffer);
+ if (ACPI_FAILURE(status))
+ return false;
+ acpi_id = object.processor.proc_id;
+ break;
+ case ACPI_TYPE_DEVICE:
+ status = acpi_evaluate_integer(handle, "_UID", NULL, &tmp);
+ if (ACPI_FAILURE(status))
+ return false;
+ acpi_id = tmp;
+ break;
+ default:
+ return false;
+ }
+
+ type = (acpi_type == ACPI_TYPE_DEVICE) ? 1 : 0;
+ cpuid = acpi_get_cpuid(handle, type, acpi_id);
+
+ if (cpuid == -1)
+ return false;
+
+ return true;
+}
static void acpi_set_pdc_bits(u32 *buf)
{
return status;
}
-static int early_pdc_done;
-
void acpi_processor_set_pdc(acpi_handle handle)
{
struct acpi_object_list *obj_list;
if (arch_has_acpi_pdc() == false)
return;
- if (early_pdc_done)
- return;
-
obj_list = acpi_processor_alloc_pdc();
if (!obj_list)
return;
}
EXPORT_SYMBOL_GPL(acpi_processor_set_pdc);
-static int early_pdc_optin;
-static int set_early_pdc_optin(const struct dmi_system_id *id)
-{
- early_pdc_optin = 1;
- return 0;
-}
-
-static int param_early_pdc_optin(char *s)
-{
- early_pdc_optin = 1;
- return 1;
-}
-__setup("acpi_early_pdc_eval", param_early_pdc_optin);
-
-static struct dmi_system_id __cpuinitdata early_pdc_optin_table[] = {
- {
- set_early_pdc_optin, "HP Envy", {
- DMI_MATCH(DMI_BIOS_VENDOR, "Hewlett-Packard"),
- DMI_MATCH(DMI_PRODUCT_NAME, "HP Envy") }, NULL},
- {
- set_early_pdc_optin, "HP Pavilion dv6", {
- DMI_MATCH(DMI_BIOS_VENDOR, "Hewlett-Packard"),
- DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv6") }, NULL},
- {
- set_early_pdc_optin, "HP Pavilion dv7", {
- DMI_MATCH(DMI_BIOS_VENDOR, "Hewlett-Packard"),
- DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv7") }, NULL},
- {},
-};
-
static acpi_status
early_init_pdc(acpi_handle handle, u32 lvl, void *context, void **rv)
{
+ if (processor_physically_present(handle) == false)
+ return AE_OK;
+
acpi_processor_set_pdc(handle);
return AE_OK;
}
void __init acpi_early_processor_set_pdc(void)
{
-
-#ifdef CONFIG_SMP
- if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
- (struct acpi_table_header **)&madt)))
- madt = NULL;
-#endif
-
/*
* Check whether the system is DMI table. If yes, OSPM
* should not use mwait for CPU-states.
*/
dmi_check_system(processor_idle_dmi_table);
- /*
- * Allow systems to opt-in to early _PDC evaluation.
- */
- dmi_check_system(early_pdc_optin_table);
- if (!early_pdc_optin)
- return;
-
acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX,
early_init_pdc, NULL, NULL, NULL);
-
- early_pdc_done = 1;
}