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: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Zhu Guihua <zhugh.fnst@cn.fujitsu.com>
Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
Acked-by: Ingo 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: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index 92b7bc9..9273e03 100644 (file)
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -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
        /*

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 7d668d1..fc88410 100644 (file)
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -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)

diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
index 02b84aa..f9f23fd 100644 (file)
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -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;

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 85b7d07..a760dac 100644 (file)
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -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;
 }
 

diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index fd59ae8..8801976 100644 (file)
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -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)

diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index c9a596b..5b4f9ac 100644 (file)
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -271,8 +271,11 @@ static inline bool invalid_phys_cpuid(phys_cpuid_t phys_id)
 /* Arch dependent functions for cpu hotplug support */
 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu);
 int acpi_unmap_cpu(int cpu);
+int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid);
 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
 
+void acpi_set_processor_mapping(void);
+
 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 int acpi_get_ioapic_id(acpi_handle handle, u32 gsi_base, u64 *phys_addr);
 #endif