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| author | Alexander Gordeev <agordeev@redhat.com> | 2012-06-05 13:23:44 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-06-06 10:22:18 +0200 |
| commit | 6398268d2bc454735f11e08705e858f9fdf5c750 (patch) | |
| tree | f6b430e540f1a5da11b371d450d3262550a330b0 /arch/x86/kernel/apic/apic.c | |
| parent | bf721d3a3bc7a731add45c8078b142b494ab413e (diff) | |
| download | lwn-6398268d2bc454735f11e08705e858f9fdf5c750.tar.gz lwn-6398268d2bc454735f11e08705e858f9fdf5c750.zip | |
x86/apic: Factor out default cpu_mask_to_apicid() operations
Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/20120605112340.GA11454@dhcp-26-207.brq.redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/apic/apic.c')
| -rw-r--r-- | arch/x86/kernel/apic/apic.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 39a222e094af..96a2608252f1 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -2123,6 +2123,34 @@ void default_init_apic_ldr(void) apic_write(APIC_LDR, val); } +unsigned int default_cpu_mask_to_apicid(const struct cpumask *cpumask) +{ + int cpu; + + /* + * We're using fixed IRQ delivery, can only return one phys APIC ID. + * May as well be the first. + */ + cpu = cpumask_first(cpumask); + if (likely((unsigned)cpu < nr_cpu_ids)) + return per_cpu(x86_cpu_to_apicid, cpu); + + return BAD_APICID; +} + +unsigned int +default_cpu_mask_to_apicid_and(const struct cpumask *cpumask, + const struct cpumask *andmask) +{ + int cpu; + + for_each_cpu_and(cpu, cpumask, andmask) { + if (cpumask_test_cpu(cpu, cpu_online_mask)) + break; + } + return per_cpu(x86_cpu_to_apicid, cpu); +} + /* * Power management */ |