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x86: use x2apic id reported by cpuid during topology discovery

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use x2apic id reported by cpuid during topology discovery, instead of the
apic id configured in the APIC. For most of the systems, x2apic id
reported by cpuid leaf 0xb will be same as the physical apic id reported
by the APIC_ID register of the APIC. We follow the suggested guidelines
and use the apic id reported by the cpuid.

No change to non-generic UV platforms, will use the apic id reported in the
APIC_ID register as the cpuid reported apic id's may not be unique.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Suresh Siddha 2008-08-23 17:47:11 +02:00 committed by Ingo Molnar
parent bbb65d2d36
commit e17941b0c1
2 changed files with 2 additions and 12 deletions
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7
arch/x86/kernel/genx2apic_cluster.c
View File

@ -120,14 +120,9 @@ static unsigned long set_apic_id(unsigned int id)
return x; return x;
} }
static unsigned int x2apic_read_id(void)
{
return apic_read(APIC_ID);
}
static unsigned int phys_pkg_id(int index_msb) static unsigned int phys_pkg_id(int index_msb)
{ {
return x2apic_read_id() >> index_msb; return current_cpu_data.initial_apicid >> index_msb;
} }
static void x2apic_send_IPI_self(int vector) static void x2apic_send_IPI_self(int vector)

7
arch/x86/kernel/genx2apic_phys.c
View File

@ -118,14 +118,9 @@ static unsigned long set_apic_id(unsigned int id)
return x; return x;
} }
static unsigned int x2apic_read_id(void)
{
return apic_read(APIC_ID);
}
static unsigned int phys_pkg_id(int index_msb) static unsigned int phys_pkg_id(int index_msb)
{ {
return x2apic_read_id() >> index_msb; return current_cpu_data.initial_apicid >> index_msb;
} }
void x2apic_send_IPI_self(int vector) void x2apic_send_IPI_self(int vector)