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authorSuresh Siddha <suresh.b.siddha@intel.com>2008-08-23 17:47:11 +0200
committerIngo Molnar <mingo@elte.hu>2008-08-23 17:47:11 +0200
commite17941b0c140562d92e5a3bc12b4ad88281c7926 (patch)
tree3bfdc8bf5611da7eb9abb8905dce3a1f17c0926a /arch/x86/kernel/genx2apic_phys.c
parentbbb65d2d365efe9951290e61678dcf81ec60add4 (diff)
downloadop-kernel-dev-e17941b0c140562d92e5a3bc12b4ad88281c7926.zip
op-kernel-dev-e17941b0c140562d92e5a3bc12b4ad88281c7926.tar.gz
x86: use x2apic id reported by cpuid during topology discovery
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>
Diffstat (limited to 'arch/x86/kernel/genx2apic_phys.c')
-rw-r--r--arch/x86/kernel/genx2apic_phys.c7
1 files changed, 1 insertions, 6 deletions
diff --git a/arch/x86/kernel/genx2apic_phys.c b/arch/x86/kernel/genx2apic_phys.c
index 3229c68..e2401ab 100644
--- a/arch/x86/kernel/genx2apic_phys.c
+++ b/arch/x86/kernel/genx2apic_phys.c
@@ -118,14 +118,9 @@ static unsigned long set_apic_id(unsigned int id)
return x;
}
-static unsigned int x2apic_read_id(void)
-{
- return apic_read(APIC_ID);
-}
-
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)
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