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x86, apic: Clean up bigsmp apic selection code 

Make generic_bigsmp_probe() return struct apic *. This will
avoid exporting apic_bigsmp, which will be consistent with
others.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Tested-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: steiner@sgi.com
Cc: gorcunov@openvz.org
Cc: yinghai@kernel.org
Link: http://lkml.kernel.org/r/20110521005526.252703851@sbsiddha-MOBL3.sc.intel.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Suresh Siddha 2011-05-20 17:51:19 -07:00 committed by Ingo Molnar
parent 8b37e88061
commit 69c252ffce
3 changed files with 32 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/include/asm/apic.h
View File

@ -500,7 +500,7 @@ static inline void default_wait_for_init_deassert(atomic_t *deassert)
return;
}
extern void generic_bigsmp_probe(void);
extern struct apic *generic_bigsmp_probe(void);
#ifdef CONFIG_X86_LOCAL_APIC

8
arch/x86/kernel/apic/bigsmp_32.c
View File

@ -255,4 +255,12 @@ struct apic apic_bigsmp = {
.x86_32_early_logical_apicid = bigsmp_early_logical_apicid,
};
struct apic * __init generic_bigsmp_probe(void)
{
if (probe_bigsmp())
return &apic_bigsmp;
return NULL;
}
apic_driver(apic_bigsmp);

52
arch/x86/kernel/apic/probe_32.c
View File

@ -52,31 +52,6 @@ static int __init print_ipi_mode(void)
}
late_initcall(print_ipi_mode);
void __init default_setup_apic_routing(void)
{
int version = apic_version[boot_cpu_physical_apicid];
if (num_possible_cpus() > 8) {
switch (boot_cpu_data.x86_vendor) {
case X86_VENDOR_INTEL:
if (!APIC_XAPIC(version)) {
def_to_bigsmp = 0;
break;
}
/* If P4 and above fall through */
case X86_VENDOR_AMD:
def_to_bigsmp = 1;
}
}
#ifdef CONFIG_X86_BIGSMP
generic_bigsmp_probe();
#endif
if (apic->setup_apic_routing)
apic->setup_apic_routing();
}
static int default_x86_32_early_logical_apicid(int cpu)
{
return 1 << cpu;
@ -224,24 +199,43 @@ static int __init parse_apic(char *arg)
}
early_param("apic", parse_apic);
void __init generic_bigsmp_probe(void)
void __init default_setup_apic_routing(void)
{
int version = apic_version[boot_cpu_physical_apicid];
if (num_possible_cpus() > 8) {
switch (boot_cpu_data.x86_vendor) {
case X86_VENDOR_INTEL:
if (!APIC_XAPIC(version)) {
def_to_bigsmp = 0;
break;
}
/* If P4 and above fall through */
case X86_VENDOR_AMD:
def_to_bigsmp = 1;
}
}
#ifdef CONFIG_X86_BIGSMP
/*
* This routine is used to switch to bigsmp mode when
* This is used to switch to bigsmp mode when
* - There is no apic= option specified by the user
* - generic_apic_probe() has chosen apic_default as the sub_arch
* - we find more than 8 CPUs in acpi LAPIC listing with xAPIC support
*/
if (!cmdline_apic && apic == &apic_default) {
if (apic_bigsmp.probe()) {
apic = &apic_bigsmp;
struct apic *bigsmp = generic_bigsmp_probe();
if (bigsmp) {
apic = bigsmp;
printk(KERN_INFO "Overriding APIC driver with %s\n",
apic->name);
}
}
#endif
if (apic->setup_apic_routing)
apic->setup_apic_routing();
}
void __init generic_apic_probe(void)