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authorLen Brown <len.brown@intel.com>2005-09-08 01:45:47 -0400
committerLen Brown <len.brown@intel.com>2005-09-08 01:45:47 -0400
commit64e47488c913ac704d465a6af86a26786d1412a5 (patch)
treed3b0148592963dcde26e4bb35ddfec8b1eaf8e23 /arch/i386/mach-generic/probe.c
parent4a35a46bf1cda4737c428380d1db5d15e2590d18 (diff)
parentcaf39e87cc1182f7dae84eefc43ca14d54c78ef9 (diff)
downloadblackbird-op-linux-64e47488c913ac704d465a6af86a26786d1412a5.tar.gz
blackbird-op-linux-64e47488c913ac704d465a6af86a26786d1412a5.zip
Merge linux-2.6 with linux-acpi-2.6
Diffstat (limited to 'arch/i386/mach-generic/probe.c')
-rw-r--r--arch/i386/mach-generic/probe.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/i386/mach-generic/probe.c b/arch/i386/mach-generic/probe.c
index 5497c65a8790..cea5b3ce4b57 100644
--- a/arch/i386/mach-generic/probe.c
+++ b/arch/i386/mach-generic/probe.c
@@ -30,6 +30,25 @@ struct genapic *apic_probe[] __initdata = {
NULL,
};
+static int cmdline_apic;
+
+void __init generic_bigsmp_probe(void)
+{
+ /*
+ * This routine is used to switch to bigsmp mode when
+ * - There is no apic= option specified by the user
+ * - generic_apic_probe() has choosen apic_default as the sub_arch
+ * - we find more than 8 CPUs in acpi LAPIC listing with xAPIC support
+ */
+
+ if (!cmdline_apic && genapic == &apic_default)
+ if (apic_bigsmp.probe()) {
+ genapic = &apic_bigsmp;
+ printk(KERN_INFO "Overriding APIC driver with %s\n",
+ genapic->name);
+ }
+}
+
void __init generic_apic_probe(char *command_line)
{
char *s;
@@ -52,6 +71,7 @@ void __init generic_apic_probe(char *command_line)
if (!changed)
printk(KERN_ERR "Unknown genapic `%s' specified.\n", s);
*p = old;
+ cmdline_apic = changed;
}
for (i = 0; !changed && apic_probe[i]; i++) {
if (apic_probe[i]->probe()) {
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