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Merge branch 'acpi-processor'

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* acpi-processor:
  ACPI / processor: fixed a brace coding style issue
  ACPI / processor: Remove outdated comments
  ACPI / processor: remove unnecessary if (!pr) check
  ACPI / processor: remove some dead code in acpi_processor_get_info()
  x86 / ACPI: simplify _acpi_map_lsapic()
  ACPI / processor: use apic_id and remove duplicated _MAT evaluation
  ACPI / processor: Introduce apic_id in struct processor to save parsed APIC id
This commit is contained in:
Rafael J. Wysocki
2013-10-28 01:11:24 +01:00
parent 8e32e47dbb 764d022133
commit 3fbc4d6374
9 changed files with 61 additions and 131 deletions
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88
arch/x86/kernel/acpi/boot.c
View File

@@ -189,24 +189,31 @@ static int __init acpi_parse_madt(struct acpi_table_header *table)
return 0;
}
static void acpi_register_lapic(int id, u8 enabled)
/**
* acpi_register_lapic - register a local apic and generates a logic cpu number
* @id: local apic id to register
* @enabled: this cpu is enabled or not
*
* Returns the logic cpu number which maps to the local apic
*/
static int acpi_register_lapic(int id, u8 enabled)
{
unsigned int ver = 0;
if (id >= MAX_LOCAL_APIC) {
printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
return;
return -EINVAL;
}
if (!enabled) {
++disabled_cpus;
return;
return -EINVAL;
}
if (boot_cpu_physical_apicid != -1U)
ver = apic_version[boot_cpu_physical_apicid];
generic_processor_info(id, ver);
return generic_processor_info(id, ver);
}
static int __init
@@ -614,84 +621,27 @@ static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
#endif
}
static int _acpi_map_lsapic(acpi_handle handle, int *pcpu)
static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
struct acpi_madt_local_apic *lapic;
cpumask_var_t tmp_map, new_map;
u8 physid;
int cpu;
int retval = -ENOMEM;
if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
return -EINVAL;
if (!buffer.length || !buffer.pointer)
return -EINVAL;
obj = buffer.pointer;
if (obj->type != ACPI_TYPE_BUFFER ||
obj->buffer.length < sizeof(*lapic)) {
kfree(buffer.pointer);
return -EINVAL;
}
lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
!(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
kfree(buffer.pointer);
return -EINVAL;
}
physid = lapic->id;
kfree(buffer.pointer);
buffer.length = ACPI_ALLOCATE_BUFFER;
buffer.pointer = NULL;
lapic = NULL;
if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
goto out;
if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
goto free_tmp_map;
cpumask_copy(tmp_map, cpu_present_mask);
acpi_register_lapic(physid, ACPI_MADT_ENABLED);
/*
* If acpi_register_lapic successfully generates a new logical cpu
* number, then the following will get us exactly what was mapped
*/
cpumask_andnot(new_map, cpu_present_mask, tmp_map);
if (cpumask_empty(new_map)) {
printk ("Unable to map lapic to logical cpu number\n");
retval = -EINVAL;
goto free_new_map;
cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
if (cpu < 0) {
pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
return cpu;
}
acpi_processor_set_pdc(handle);
cpu = cpumask_first(new_map);
acpi_map_cpu2node(handle, cpu, physid);
*pcpu = cpu;
retval = 0;
free_new_map:
free_cpumask_var(new_map);
free_tmp_map:
free_cpumask_var(tmp_map);
out:
return retval;
return 0;
}
/* wrapper to silence section mismatch warning */
int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
{
return _acpi_map_lsapic(handle, pcpu);
return _acpi_map_lsapic(handle, physid, pcpu);
}
EXPORT_SYMBOL(acpi_map_lsapic);

8
arch/x86/kernel/apic/apic.c
View File

@@ -2107,7 +2107,7 @@ void disconnect_bsp_APIC(int virt_wire_setup)
apic_write(APIC_LVT1, value);
}
void generic_processor_info(int apicid, int version)
int generic_processor_info(int apicid, int version)
{
int cpu, max = nr_cpu_ids;
bool boot_cpu_detected = physid_isset(boot_cpu_physical_apicid,
@@ -2127,7 +2127,7 @@ void generic_processor_info(int apicid, int version)
" Processor %d/0x%x ignored.\n", max, thiscpu, apicid);
disabled_cpus++;
return;
return -ENODEV;
}
if (num_processors >= nr_cpu_ids) {
@@ -2138,7 +2138,7 @@ void generic_processor_info(int apicid, int version)
" Processor %d/0x%x ignored.\n", max, thiscpu, apicid);
disabled_cpus++;
return;
return -EINVAL;
}
num_processors++;
@@ -2183,6 +2183,8 @@ void generic_processor_info(int apicid, int version)
#endif
set_cpu_possible(cpu, true);
set_cpu_present(cpu, true);
return cpu;
}
int hard_smp_processor_id(void)