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-rw-r--r--drivers/acpi/acpi_processor.c21
-rw-r--r--drivers/acpi/processor_core.c56
-rw-r--r--include/acpi/processor.h8
3 files changed, 44 insertions, 41 deletions
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
index 1fdf5e07a1c7..f02b29eb0fda 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -170,7 +170,7 @@ static int acpi_processor_hotadd_init(struct acpi_processor *pr)
acpi_status status;
int ret;
- if (pr->apic_id == -1)
+ if (pr->phys_id == -1)
return -ENODEV;
status = acpi_evaluate_integer(pr->handle, "_STA", NULL, &sta);
@@ -180,7 +180,7 @@ static int acpi_processor_hotadd_init(struct acpi_processor *pr)
cpu_maps_update_begin();
cpu_hotplug_begin();
- ret = acpi_map_lsapic(pr->handle, pr->apic_id, &pr->id);
+ ret = acpi_map_lsapic(pr->handle, pr->phys_id, &pr->id);
if (ret)
goto out;
@@ -215,7 +215,7 @@ static int acpi_processor_get_info(struct acpi_device *device)
union acpi_object object = { 0 };
struct acpi_buffer buffer = { sizeof(union acpi_object), &object };
struct acpi_processor *pr = acpi_driver_data(device);
- int apic_id, cpu_index, device_declaration = 0;
+ int phys_id, cpu_index, device_declaration = 0;
acpi_status status = AE_OK;
static int cpu0_initialized;
unsigned long long value;
@@ -262,15 +262,18 @@ static int acpi_processor_get_info(struct acpi_device *device)
pr->acpi_id = value;
}
- apic_id = acpi_get_apicid(pr->handle, device_declaration, pr->acpi_id);
- if (apic_id < 0)
- acpi_handle_debug(pr->handle, "failed to get CPU APIC ID.\n");
- pr->apic_id = apic_id;
+ phys_id = acpi_get_phys_id(pr->handle, device_declaration, pr->acpi_id);
+ if (phys_id < 0)
+ acpi_handle_debug(pr->handle, "failed to get CPU physical ID.\n");
+ pr->phys_id = phys_id;
- cpu_index = acpi_map_cpuid(pr->apic_id, pr->acpi_id);
+ cpu_index = acpi_map_cpuid(pr->phys_id, pr->acpi_id);
if (!cpu0_initialized && !acpi_has_cpu_in_madt()) {
cpu0_initialized = 1;
- /* Handle UP system running SMP kernel, with no LAPIC in MADT */
+ /*
+ * Handle UP system running SMP kernel, with no CPU
+ * entry in MADT
+ */
if ((cpu_index == -1) && (num_online_cpus() == 1))
cpu_index = 0;
}
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 342942f90a10..02e48394276c 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -69,7 +69,7 @@ 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;
+ int phys_id = -1; /* CPU hardware ID */
if (!read_madt) {
if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
@@ -79,7 +79,7 @@ static int map_madt_entry(int type, u32 acpi_id)
}
if (!madt)
- return apic_id;
+ return phys_id;
entry = (unsigned long)madt;
madt_end = entry + madt->header.length;
@@ -91,18 +91,18 @@ static int map_madt_entry(int type, u32 acpi_id)
struct acpi_subtable_header *header =
(struct acpi_subtable_header *)entry;
if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
- if (!map_lapic_id(header, acpi_id, &apic_id))
+ if (!map_lapic_id(header, acpi_id, &phys_id))
break;
} else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) {
- if (!map_x2apic_id(header, type, acpi_id, &apic_id))
+ if (!map_x2apic_id(header, type, acpi_id, &phys_id))
break;
} else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
- if (!map_lsapic_id(header, type, acpi_id, &apic_id))
+ if (!map_lsapic_id(header, type, acpi_id, &phys_id))
break;
}
entry += header->length;
}
- return apic_id;
+ return phys_id;
}
static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
@@ -110,7 +110,7 @@ static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
struct acpi_subtable_header *header;
- int apic_id = -1;
+ int phys_id = -1;
if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
goto exit;
@@ -126,38 +126,38 @@ static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
header = (struct acpi_subtable_header *)obj->buffer.pointer;
if (header->type == ACPI_MADT_TYPE_LOCAL_APIC)
- map_lapic_id(header, acpi_id, &apic_id);
+ map_lapic_id(header, acpi_id, &phys_id);
else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC)
- map_lsapic_id(header, type, acpi_id, &apic_id);
+ map_lsapic_id(header, type, acpi_id, &phys_id);
else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC)
- map_x2apic_id(header, type, acpi_id, &apic_id);
+ map_x2apic_id(header, type, acpi_id, &phys_id);
exit:
kfree(buffer.pointer);
- return apic_id;
+ return phys_id;
}
-int acpi_get_apicid(acpi_handle handle, int type, u32 acpi_id)
+int acpi_get_phys_id(acpi_handle handle, int type, u32 acpi_id)
{
- int apic_id;
+ int phys_id;
- apic_id = map_mat_entry(handle, type, acpi_id);
- if (apic_id == -1)
- apic_id = map_madt_entry(type, acpi_id);
+ phys_id = map_mat_entry(handle, type, acpi_id);
+ if (phys_id == -1)
+ phys_id = map_madt_entry(type, acpi_id);
- return apic_id;
+ return phys_id;
}
-int acpi_map_cpuid(int apic_id, u32 acpi_id)
+int acpi_map_cpuid(int phys_id, u32 acpi_id)
{
#ifdef CONFIG_SMP
int i;
#endif
- if (apic_id == -1) {
+ if (phys_id == -1) {
/*
* On UP processor, there is no _MAT or MADT table.
- * So above apic_id is always set to -1.
+ * So above phys_id is always set to -1.
*
* BIOS may define multiple CPU handles even for UP processor.
* For example,
@@ -170,7 +170,7 @@ int acpi_map_cpuid(int apic_id, u32 acpi_id)
* Processor (CPU3, 0x03, 0x00000410, 0x06) {}
* }
*
- * Ignores apic_id and always returns 0 for the processor
+ * Ignores phys_id and always returns 0 for the processor
* handle with acpi id 0 if nr_cpu_ids is 1.
* This should be the case if SMP tables are not found.
* Return -1 for other CPU's handle.
@@ -178,28 +178,28 @@ int acpi_map_cpuid(int apic_id, u32 acpi_id)
if (nr_cpu_ids <= 1 && acpi_id == 0)
return acpi_id;
else
- return apic_id;
+ return phys_id;
}
#ifdef CONFIG_SMP
for_each_possible_cpu(i) {
- if (cpu_physical_id(i) == apic_id)
+ if (cpu_physical_id(i) == phys_id)
return i;
}
#else
/* In UP kernel, only processor 0 is valid */
- if (apic_id == 0)
- return apic_id;
+ if (phys_id == 0)
+ return phys_id;
#endif
return -1;
}
int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id)
{
- int apic_id;
+ int phys_id;
- apic_id = acpi_get_apicid(handle, type, acpi_id);
+ phys_id = acpi_get_phys_id(handle, type, acpi_id);
- return acpi_map_cpuid(apic_id, acpi_id);
+ return acpi_map_cpuid(phys_id, acpi_id);
}
EXPORT_SYMBOL_GPL(acpi_get_cpuid);
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index 3ca9b751f122..b95dc32a6e6b 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -196,8 +196,8 @@ struct acpi_processor_flags {
struct acpi_processor {
acpi_handle handle;
u32 acpi_id;
- u32 apic_id;
- u32 id;
+ u32 phys_id; /* CPU hardware ID such as APIC ID for x86 */
+ u32 id; /* CPU logical ID allocated by OS */
u32 pblk;
int performance_platform_limit;
int throttling_platform_limit;
@@ -310,8 +310,8 @@ static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
#endif /* CONFIG_CPU_FREQ */
/* in processor_core.c */
-int acpi_get_apicid(acpi_handle, int type, u32 acpi_id);
-int acpi_map_cpuid(int apic_id, u32 acpi_id);
+int acpi_get_phys_id(acpi_handle, int type, u32 acpi_id);
+int acpi_map_cpuid(int phys_id, u32 acpi_id);
int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
/* in processor_pdc.c */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.