linux/arch/x86/kernel/smpcommon.c
Jens Axboe 3b16cf8748 x86: convert to generic helpers for IPI function calls
This converts x86, x86-64, and xen to use the new helpers for
smp_call_function() and friends, and adds support for
smp_call_function_single().

Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-06-26 11:21:54 +02:00

28 lines
709 B
C

/*
* SMP stuff which is common to all sub-architectures.
*/
#include <linux/module.h>
#include <asm/smp.h>
#ifdef CONFIG_X86_32
DEFINE_PER_CPU(unsigned long, this_cpu_off);
EXPORT_PER_CPU_SYMBOL(this_cpu_off);
/* Initialize the CPU's GDT. This is either the boot CPU doing itself
(still using the master per-cpu area), or a CPU doing it for a
secondary which will soon come up. */
__cpuinit void init_gdt(int cpu)
{
struct desc_struct *gdt = get_cpu_gdt_table(cpu);
pack_descriptor(&gdt[GDT_ENTRY_PERCPU],
__per_cpu_offset[cpu], 0xFFFFF,
0x2 | DESCTYPE_S, 0x8);
gdt[GDT_ENTRY_PERCPU].s = 1;
per_cpu(this_cpu_off, cpu) = __per_cpu_offset[cpu];
per_cpu(cpu_number, cpu) = cpu;
}
#endif