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| author | travis@sgi.com <travis@sgi.com> | 2008-01-30 13:33:12 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:33:12 +0100 |
| commit | e8c10ef9dde3ab7b7d7db6804859d9daf38f01c4 (patch) | |
| tree | 528635634911cc977325b746aa149a55b402b2bf /arch/x86/kernel/apic_64.c | |
| parent | ea348f3e58f43a27c8ac414dd3a14ee59528b86a (diff) | |
| download | lwn-e8c10ef9dde3ab7b7d7db6804859d9daf38f01c4.tar.gz lwn-e8c10ef9dde3ab7b7d7db6804859d9daf38f01c4.zip | |
x86: change bios_cpu_apicid to percpu data variable
Change static bios_cpu_apicid array to a per_cpu data variable.
This includes using a static array used during initialization
similar to the way x86_cpu_to_apicid[] is handled.
There is one early use of bios_cpu_apicid in apic_is_clustered_box().
The other reference in cpu_present_to_apicid() is called after
smp_set_apicids() has setup the percpu version of bios_cpu_apicid.
[ mingo@elte.hu: build fix ]
Signed-off-by: Mike Travis <travis@sgi.com>
Reviewed-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/apic_64.c')
| -rw-r--r-- | arch/x86/kernel/apic_64.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/arch/x86/kernel/apic_64.c b/arch/x86/kernel/apic_64.c index 01d4ca27ecf0..f9919c492699 100644 --- a/arch/x86/kernel/apic_64.c +++ b/arch/x86/kernel/apic_64.c @@ -1180,14 +1180,26 @@ __cpuinit int apic_is_clustered_box(void) bitmap_zero(clustermap, NUM_APIC_CLUSTERS); for (i = 0; i < NR_CPUS; i++) { - id = bios_cpu_apicid[i]; + /* are we being called early in kernel startup? */ + if (x86_bios_cpu_apicid_early_ptr) { + id = ((u16 *)x86_bios_cpu_apicid_early_ptr)[i]; + } + else if (i < nr_cpu_ids) { + if (cpu_present(i)) + id = per_cpu(x86_bios_cpu_apicid, i); + else + continue; + } + else + break; + if (id != BAD_APICID) __set_bit(APIC_CLUSTERID(id), clustermap); } /* Problem: Partially populated chassis may not have CPUs in some of * the APIC clusters they have been allocated. Only present CPUs have - * bios_cpu_apicid entries, thus causing zeroes in the bitmap. Since + * x86_bios_cpu_apicid entries, thus causing zeroes in the bitmap. Since * clusters are allocated sequentially, count zeros only if they are * bounded by ones. */ |