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Commit 3fbc4d63 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

Merge branch 'acpi-processor' 

* 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  ACPI / processor: Remove outdated comments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
parents 8e32e47d 764d0221

arch/ia64/kernel/acpi.c

+4 −34
Original line number Diff line number Diff line
@@ -882,40 +882,10 @@ __init void prefill_possible_map(void) 
		set_cpu_possible(i, true);

}



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_sapic *lsapic;

	cpumask_t tmp_map;

	int cpu, physid;



	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)

	{

		kfree(buffer.pointer);

		return -EINVAL;

	}



	lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;



	if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||

	    (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {

		kfree(buffer.pointer);

		return -EINVAL;

	}



	physid = ((lsapic->id << 8) | (lsapic->eid));



	kfree(buffer.pointer);

	buffer.length = ACPI_ALLOCATE_BUFFER;

	buffer.pointer = NULL;

	int cpu;



	cpumask_complement(&tmp_map, cpu_present_mask);

	cpu = cpumask_first(&tmp_map);
@@ -934,9 +904,9 @@ static int _acpi_map_lsapic(acpi_handle handle, int *pcpu) 
}



/* 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);

arch/x86/include/asm/mpspec.h

+1 −1
Original line number Diff line number Diff line
@@ -94,7 +94,7 @@ static inline void early_reserve_e820_mpc_new(void) { } 
#define default_get_smp_config x86_init_uint_noop

#endif



void generic_processor_info(int apicid, int version);

int generic_processor_info(int apicid, int version);

#ifdef CONFIG_ACPI

extern void mp_register_ioapic(int id, u32 address, u32 gsi_base);

extern void mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,

arch/x86/kernel/acpi/boot.c

+19 −69
Original line number Diff line number Diff line
@@ -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);

arch/x86/kernel/apic/apic.c

+5 −3
Original line number Diff line number Diff line
@@ -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)

drivers/acpi/acpi_processor.c

+6 −16
Original line number Diff line number Diff line
@@ -140,15 +140,11 @@ static int acpi_processor_errata_piix4(struct pci_dev *dev) 
	return 0;

}



static int acpi_processor_errata(struct acpi_processor *pr)

static int acpi_processor_errata(void)

{

	int result = 0;

	struct pci_dev *dev = NULL;





	if (!pr)

		return -EINVAL;



	/*

	 * PIIX4

	 */
@@ -181,7 +177,7 @@ static int acpi_processor_hotadd_init(struct acpi_processor *pr) 
	cpu_maps_update_begin();

	cpu_hotplug_begin();



	ret = acpi_map_lsapic(pr->handle, &pr->id);

	ret = acpi_map_lsapic(pr->handle, pr->apic_id, &pr->id);

	if (ret)

		goto out;
@@ -221,10 +217,7 @@ static int acpi_processor_get_info(struct acpi_device *device) 
	static int cpu0_initialized;

	unsigned long long value;



	if (num_online_cpus() > 1)

		errata.smp = TRUE;



	acpi_processor_errata(pr);

	acpi_processor_errata();



	/*

	 * Check to see if we have bus mastering arbitration control.  This
@@ -248,11 +241,6 @@ static int acpi_processor_get_info(struct acpi_device *device) 
			return -ENODEV;

		}



		/*

		 * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP.

		 *      >>> 'acpi_get_processor_id(acpi_id, &id)' in

		 *      arch/xxx/acpi.c

		 */

		pr->acpi_id = object.processor.proc_id;

	} else {

		/*
@@ -270,7 +258,9 @@ static int acpi_processor_get_info(struct acpi_device *device) 
		device_declaration = 1;

		pr->acpi_id = value;

	}

	cpu_index = acpi_get_cpuid(pr->handle, device_declaration, pr->acpi_id);

	pr->apic_id = acpi_get_apicid(pr->handle, device_declaration,

					pr->acpi_id);

	cpu_index = acpi_map_cpuid(pr->apic_id, pr->acpi_id);



	/* Handle UP system running SMP kernel, with no LAPIC in MADT */

	if (!cpu0_initialized && (cpu_index == -1) &&