Commit-ID: 6f802c4bfa2acf1bffa8341fe9084da0205d581d
Gitweb: http://git.kernel.org/tip/6f802c4bfa2acf1bffa8341fe9084da0205d581d
Author: Tejun Heo <tj@xxxxxxxxxx>
AuthorDate: Sun, 23 Jan 2011 14:37:31 +0100
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Fri, 28 Jan 2011 14:54:05 +0100
x86: Always use x86_cpu_to_logical_apicid for cpu -> logical apic id
Currently, cpu -> logical apic id translation is done by
apic->cpu_to_logical_apicid() callback which may or may not use
x86_cpu_to_logical_apicid. This is unnecessary as it should
always equal logical_smp_processor_id() which is known early
during CPU bring up.
Initialize x86_cpu_to_logical_apicid after apic->init_apic_ldr()
in setup_local_APIC() and always use x86_cpu_to_logical_apicid
for cpu -> logical apic id mapping.
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
Cc: eric.dumazet@xxxxxxxxx
Cc: yinghai@xxxxxxxxxx
Cc: brgerst@xxxxxxxxx
Cc: gorcunov@xxxxxxxxx
Cc: penberg@xxxxxxxxxx
Cc: shaohui.zheng@xxxxxxxxx
Cc: rientjes@xxxxxxxxxx
LKML-Reference: <1295789862-25482-6-git-send-email-tj@xxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
arch/x86/kernel/apic/apic.c | 8 ++++++++
arch/x86/kernel/apic/ipi.c | 8 ++++----
arch/x86/kernel/smpboot.c | 7 +++----
3 files changed, 15 insertions(+), 8 deletions(-)
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 126d5a3..ae08246 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1248,6 +1248,14 @@ void __cpuinit setup_local_APIC(void)
*/
apic->init_apic_ldr();
+#ifdef CONFIG_X86_32
+ /*
+ * APIC LDR is initialized. Fetch and store logical_apic_id.
+ */
+ early_per_cpu(x86_cpu_to_logical_apicid, cpu) =
+ logical_smp_processor_id();
+#endif
+
/*
* Set Task Priority to 'accept all'. We never change this
* later on.
diff --git a/arch/x86/kernel/apic/ipi.c b/arch/x86/kernel/apic/ipi.c
index 5037736..cce91bf 100644
--- a/arch/x86/kernel/apic/ipi.c
+++ b/arch/x86/kernel/apic/ipi.c
@@ -73,8 +73,8 @@ void default_send_IPI_mask_sequence_logical(const struct cpumask *mask,
local_irq_save(flags);
for_each_cpu(query_cpu, mask)
__default_send_IPI_dest_field(
- apic->cpu_to_logical_apicid(query_cpu), vector,
- apic->dest_logical);
+ early_per_cpu(x86_cpu_to_logical_apicid, query_cpu),
+ vector, apic->dest_logical);
local_irq_restore(flags);
}
@@ -92,8 +92,8 @@ void default_send_IPI_mask_allbutself_logical(const struct cpumask *mask,
if (query_cpu == this_cpu)
continue;
__default_send_IPI_dest_field(
- apic->cpu_to_logical_apicid(query_cpu), vector,
- apic->dest_logical);
+ early_per_cpu(x86_cpu_to_logical_apicid, query_cpu),
+ vector, apic->dest_logical);
}
local_irq_restore(flags);
}
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index df934e4..ca20f6b 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -168,19 +168,18 @@ static void unmap_cpu_to_node(int cpu)
static void map_cpu_to_logical_apicid(void)
{
int cpu = smp_processor_id();
- int apicid = logical_smp_processor_id();
- int node = apic->apicid_to_node(apicid);
+ int logical_apicid = early_per_cpu(x86_cpu_to_logical_apicid, cpu);
+ int node;
+ node = apic->apicid_to_node(logical_apicid);
if (!node_online(node))
node = first_online_node;
- early_per_cpu(x86_cpu_to_logical_apicid, cpu) = apicid;
map_cpu_to_node(cpu, node);
}
void numa_remove_cpu(int cpu)
{
- early_per_cpu(x86_cpu_to_logical_apicid, cpu) = BAD_APICID;
unmap_cpu_to_node(cpu);
}
#else
--
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