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Commit dc6db24d authored by Gu Zheng's avatar Gu Zheng Committed by Thomas Gleixner
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x86/acpi: Set persistent cpuid <-> nodeid mapping when booting 



The whole patch-set aims at making cpuid <-> nodeid mapping persistent. So that,
when node online/offline happens, cache based on cpuid <-> nodeid mapping such as
wq_numa_possible_cpumask will not cause any problem.
It contains 4 steps:
1. Enable apic registeration flow to handle both enabled and disabled cpus.
2. Introduce a new array storing all possible cpuid <-> apicid mapping.
3. Enable _MAT and MADT relative apis to return non-present or disabled cpus' apicid.
4. Establish all possible cpuid <-> nodeid mapping.

This patch finishes step 4.

This patch set the persistent cpuid <-> nodeid mapping for all enabled/disabled
processors at boot time via an additional acpi namespace walk for processors.

[ tglx: Remove the unneeded exports ]

Signed-off-by: default avatarGu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: default avatarTang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: default avatarZhu Guihua <zhugh.fnst@cn.fujitsu.com>
Signed-off-by: default avatarDou Liyang <douly.fnst@cn.fujitsu.com>
Acked-by: default avatarIngo Molnar <mingo@kernel.org>
Cc: mika.j.penttila@gmail.com
Cc: len.brown@intel.com
Cc: rafael@kernel.org
Cc: rjw@rjwysocki.net
Cc: yasu.isimatu@gmail.com
Cc: linux-mm@kvack.org
Cc: linux-acpi@vger.kernel.org
Cc: isimatu.yasuaki@jp.fujitsu.com
Cc: gongzhaogang@inspur.com
Cc: tj@kernel.org
Cc: izumi.taku@jp.fujitsu.com
Cc: cl@linux.com
Cc: chen.tang@easystack.cn
Cc: akpm@linux-foundation.org
Cc: kamezawa.hiroyu@jp.fujitsu.com
Cc: lenb@kernel.org
Link: http://lkml.kernel.org/r/1472114120-3281-6-git-send-email-douly.fnst@cn.fujitsu.com


Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 8ad893fa

arch/ia64/kernel/acpi.c

+1 −1
Original line number Diff line number Diff line
@@ -796,7 +796,7 @@ int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 
 *  ACPI based hotplug CPU support

 */

#ifdef CONFIG_ACPI_HOTPLUG_CPU

static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)

int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)

{

#ifdef CONFIG_ACPI_NUMA

	/*

arch/x86/kernel/acpi/boot.c

+2 −1
Original line number Diff line number Diff line
@@ -702,7 +702,7 @@ static void __init acpi_set_irq_model_ioapic(void) 
#ifdef CONFIG_ACPI_HOTPLUG_CPU

#include <acpi/processor.h>



static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)

int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)

{

#ifdef CONFIG_ACPI_NUMA

	int nid;
@@ -713,6 +713,7 @@ static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 
		numa_set_node(cpu, nid);

	}

#endif

	return 0;

}



int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu)

drivers/acpi/acpi_processor.c

+5 −0
Original line number Diff line number Diff line
@@ -182,6 +182,11 @@ int __weak arch_register_cpu(int cpu) 


void __weak arch_unregister_cpu(int cpu) {}



int __weak acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)

{

	return -ENODEV;

}



static int acpi_processor_hotadd_init(struct acpi_processor *pr)

{

	unsigned long long sta;

drivers/acpi/bus.c

+1 −0
Original line number Diff line number Diff line
@@ -1193,6 +1193,7 @@ static int __init acpi_init(void) 
	acpi_wakeup_device_init();

	acpi_debugger_init();

	acpi_setup_sb_notify_handler();

	acpi_set_processor_mapping();

	return 0;

}

drivers/acpi/processor_core.c

+68 −0
Original line number Diff line number Diff line
@@ -280,6 +280,74 @@ int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id) 
}

EXPORT_SYMBOL_GPL(acpi_get_cpuid);



#ifdef CONFIG_ACPI_HOTPLUG_CPU

static bool __init

map_processor(acpi_handle handle, phys_cpuid_t *phys_id, int *cpuid)

{

	int 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;



	*phys_id = __acpi_get_phys_id(handle, type, acpi_id, false);

	*cpuid = acpi_map_cpuid(*phys_id, acpi_id);

	if (*cpuid == -1)

		return false;



	return true;

}



static acpi_status __init

set_processor_node_mapping(acpi_handle handle, u32 lvl, void *context,

			   void **rv)

{

	phys_cpuid_t phys_id;

	int cpu_id;



	if (!map_processor(handle, &phys_id, &cpu_id))

		return AE_ERROR;



	acpi_map_cpu2node(handle, cpu_id, phys_id);

	return AE_OK;

}



void __init acpi_set_processor_mapping(void)

{

	/* Set persistent cpu <-> node mapping for all processors. */

	acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT,

			    ACPI_UINT32_MAX, set_processor_node_mapping,

			    NULL, NULL, NULL);

}

#else

void __init acpi_set_processor_mapping(void) {}

#endif /* CONFIG_ACPI_HOTPLUG_CPU */



#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC

static int get_ioapic_id(struct acpi_subtable_header *entry, u32 gsi_base,

			 u64 *phys_addr, int *ioapic_id)