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hwloc support

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NAKAMURA Gou
2016-04-11 13:32:33 +09:00
parent 2a1823d52c
commit 1bb948f43b
10 changed files with 1012 additions and 0 deletions
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38
arch/x86/kernel/cpu.c
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@ -1678,4 +1678,42 @@ void arch_start_pvclock(void)
return;
} /* arch_start_pvclock() */
static struct cpu_mapping *cpu_mapping = NULL;
int arch_get_cpu_mapping(struct cpu_mapping **buf, int *nelemsp)
{
int error;
size_t size;
int npages;
struct cpu_mapping *mapping;
int cpu;
struct x86_cpu_local_variables *v;
if (!cpu_mapping) {
size = sizeof(*mapping) * num_processors;
npages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
mapping = allocate_pages(npages, IHK_MC_AP_NOWAIT);
if (!mapping) {
error = -ENOMEM;
ekprintf("arch_get_cpu_mapping:allocate_pages failed. %d\n", error);
goto out;
}
for (cpu = 0; cpu < num_processors; ++cpu) {
v = get_x86_cpu_local_variable(cpu);
mapping[cpu].cpu_number = cpu;
mapping[cpu].hw_id = v->apic_id;
}
cpu_mapping = mapping;
}
error = 0;
*buf = cpu_mapping;
*nelemsp = num_processors;
out:
return error;
} /* arch_get_cpu_mapping() */
/*** end of file ***/